CA2379277C - Polymer electrolyte and process for producing the same - Google Patents
Polymer electrolyte and process for producing the same Download PDFInfo
- Publication number
- CA2379277C CA2379277C CA2379277A CA2379277A CA2379277C CA 2379277 C CA2379277 C CA 2379277C CA 2379277 A CA2379277 A CA 2379277A CA 2379277 A CA2379277 A CA 2379277A CA 2379277 C CA2379277 C CA 2379277C
- Authority
- CA
- Canada
- Prior art keywords
- group
- formula
- carbon atoms
- polymer electrolyte
- integer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1016—Fuel cells with solid electrolytes characterised by the electrolyte material
- H01M8/1018—Polymeric electrolyte materials
- H01M8/1058—Polymeric electrolyte materials characterised by a porous support having no ion-conducting properties
- H01M8/106—Polymeric electrolyte materials characterised by a porous support having no ion-conducting properties characterised by the chemical composition of the porous support
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G75/00—Macromolecular compounds obtained by reactions forming a linkage containing sulfur with or without nitrogen, oxygen, or carbon in the main chain of the macromolecule
- C08G75/20—Polysulfones
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C311/00—Amides of sulfonic acids, i.e. compounds having singly-bound oxygen atoms of sulfo groups replaced by nitrogen atoms, not being part of nitro or nitroso groups
- C07C311/48—Amides of sulfonic acids, i.e. compounds having singly-bound oxygen atoms of sulfo groups replaced by nitrogen atoms, not being part of nitro or nitroso groups having nitrogen atoms of sulfonamide groups further bound to another hetero atom
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/20—Manufacture of shaped structures of ion-exchange resins
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/20—Manufacture of shaped structures of ion-exchange resins
- C08J5/22—Films, membranes or diaphragms
- C08J5/2206—Films, membranes or diaphragms based on organic and/or inorganic macromolecular compounds
- C08J5/2275—Heterogeneous membranes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
- H01B1/12—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances organic substances
- H01B1/122—Ionic conductors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0565—Polymeric materials, e.g. gel-type or solid-type
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1016—Fuel cells with solid electrolytes characterised by the electrolyte material
- H01M8/1018—Polymeric electrolyte materials
- H01M8/102—Polymeric electrolyte materials characterised by the chemical structure of the main chain of the ion-conducting polymer
- H01M8/1027—Polymeric electrolyte materials characterised by the chemical structure of the main chain of the ion-conducting polymer having carbon, oxygen and other atoms, e.g. sulfonated polyethersulfones [S-PES]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1016—Fuel cells with solid electrolytes characterised by the electrolyte material
- H01M8/1018—Polymeric electrolyte materials
- H01M8/102—Polymeric electrolyte materials characterised by the chemical structure of the main chain of the ion-conducting polymer
- H01M8/103—Polymeric electrolyte materials characterised by the chemical structure of the main chain of the ion-conducting polymer having nitrogen, e.g. sulfonated polybenzimidazoles [S-PBI], polybenzimidazoles with phosphoric acid, sulfonated polyamides [S-PA] or sulfonated polyphosphazenes [S-PPh]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1016—Fuel cells with solid electrolytes characterised by the electrolyte material
- H01M8/1018—Polymeric electrolyte materials
- H01M8/102—Polymeric electrolyte materials characterised by the chemical structure of the main chain of the ion-conducting polymer
- H01M8/1032—Polymeric electrolyte materials characterised by the chemical structure of the main chain of the ion-conducting polymer having sulfur, e.g. sulfonated-polyethersulfones [S-PES]
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2365/00—Characterised by the use of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain; Derivatives of such polymers
- C08J2365/02—Polyphenylenes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0065—Solid electrolytes
- H01M2300/0082—Organic polymers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0088—Composites
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Electrochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Crystallography & Structural Chemistry (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Dispersion Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Fuel Cell (AREA)
- Conductive Materials (AREA)
- Primary Cells (AREA)
- Secondary Cells (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Polyethers (AREA)
- Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
Abstract
A polymer electrolyte having, in a main chain, a structural unit represented by the following formula (1): -[Ar1-(SO2-N-(X+)-SO2-Ar2)m-SO2-N-(X+)-SO2-Ar1-O]- (1) wherein Ar1 and Ar2 independently represent a divalent aromatic groups, m represents an integer of 0 to 3, and X+ represents an ion selected from hydrogen ion, an alkali metal ion and ammonium ion, which is excellent in proton conductivity, thermal resistance and strength. The polymer electrolyte is soluble in solvents and has excellent film forming property and recycling efficiency.
Description
Polymer Electrolyte And Process For Producing The Same BACKGROUND OF THE INVENTION
Field of the Invention The present invention relates to a polymer electrolyte, in particular a polymer electrolyte suitably used as a separator in electrochemical devices such as batteries, fuel cells and the like, and to a process for producing the same.
Description of the Related Art Polymer electrolytes having ion-conducting property have been used as separators in electrochemical devices such as primary cells, secondary cells, solid polymer type fuel cells and the like. Polymer materials having an acidic group such as sulfonic acid group, carboxylic acid group, phosphoric acid group and the like or a metal salt thereof are used as such polymer electrolytes.
For example, in the solid polymer type fuel cells, polymer electrolytes of perfluorosulfonic acid type including Naf ion (trademark, E. I. DuPont de Nemours Co.) have been used as the polymer electrolytes having ion-conducting property.
Since, however, these electrolytes had a problem that they were low in the membrane strength, thermal resistance and so on. While sulfonated products of random copolymers obtained from 4,4'-dihydroxydiphenylsulfone, 4,41-dihydroxybiphenyl and 4,4'-dichlorodiphenylsulfone have also been proposed, their proton conductivity is not necessarily sufficient for satisfaction and polymer electrolytes having a higher proton conductivity have been demanded.
On the other hand, compounds having disulfonylimide units in the cross-linking moieties have been known as polymer electrolytes having a disulfonylimide unit. For example, polymer electrolytes formed by cross-linking perf luoro-type sulfonyl fluoride membrane with perfluorobutane-1,4-disulfonamide (JP-A-2000-188013), polymer electrolytes formed by cross-linking chlorosulfonated polyether-ether ketone with 2,5-dichlorobenzene-1,4-disulfonamide (WO 99/61141) and the like have been proposed. Since these cross-linked polymer electrolyte membranes are insoluble and infusible, there has been a fear that recovery and reuse of materials become very difficult due to difficult separation thereof from electrode materials when they are used as separators in cells. In addition, since a step of cross-linkage is necessary after membrane molding, there is a problem that the process for production becomes complicated.
SUMMARY OF THE INVENTION
Under these circumstances, the present inventors have conducted extensive studies on polymer compounds having a disulfonylimide unit. As the result, they have found the facts that polymer compounds having a specif ic disulfonylimide unit, i.e. bis(arylsulfonyl)imide, in a main chain have a characteristic as the polymer electrolyte, are excellent in thermal resistance, can be easily formed membranes, and can be recovered as a material so that they have a good possibility for recycling, and additionally, the fact that said polymer compounds keep a high ion-conducting property when they are formed as a composite membrane with a porous membrane.
Accordingly, the present invention provides [1] a polymer electrolyte, which is excellent in practical use, having, in a main chain, a structural unit represented by the following formula (1):
-[Arl-(SO2-N-(X+)-SO2-Ar2 )m-SO2-N- (X+)-SO2-Arl-O]- (1) wherein Arland Ar 2 independently represent divalent aromatic groups , m represents an integer of 0 to 3, and X+ represents an ion selected from hydrogen ion, an alkali metal ion and ammonium ion.
The invention also provides [2]the polymer electrolyte of the above [ 1], further having, in a main chain, a structural unit represented by the following formula (2):
-[Ar3-O]- (2) wherein Ar3 represents a divalent aromatic group The invention provides [3] the polymer electrolyte of the above [2], further having, in a main chain, a structural unit represented by the following formula (2') which is different from the formula (2):
Field of the Invention The present invention relates to a polymer electrolyte, in particular a polymer electrolyte suitably used as a separator in electrochemical devices such as batteries, fuel cells and the like, and to a process for producing the same.
Description of the Related Art Polymer electrolytes having ion-conducting property have been used as separators in electrochemical devices such as primary cells, secondary cells, solid polymer type fuel cells and the like. Polymer materials having an acidic group such as sulfonic acid group, carboxylic acid group, phosphoric acid group and the like or a metal salt thereof are used as such polymer electrolytes.
For example, in the solid polymer type fuel cells, polymer electrolytes of perfluorosulfonic acid type including Naf ion (trademark, E. I. DuPont de Nemours Co.) have been used as the polymer electrolytes having ion-conducting property.
Since, however, these electrolytes had a problem that they were low in the membrane strength, thermal resistance and so on. While sulfonated products of random copolymers obtained from 4,4'-dihydroxydiphenylsulfone, 4,41-dihydroxybiphenyl and 4,4'-dichlorodiphenylsulfone have also been proposed, their proton conductivity is not necessarily sufficient for satisfaction and polymer electrolytes having a higher proton conductivity have been demanded.
On the other hand, compounds having disulfonylimide units in the cross-linking moieties have been known as polymer electrolytes having a disulfonylimide unit. For example, polymer electrolytes formed by cross-linking perf luoro-type sulfonyl fluoride membrane with perfluorobutane-1,4-disulfonamide (JP-A-2000-188013), polymer electrolytes formed by cross-linking chlorosulfonated polyether-ether ketone with 2,5-dichlorobenzene-1,4-disulfonamide (WO 99/61141) and the like have been proposed. Since these cross-linked polymer electrolyte membranes are insoluble and infusible, there has been a fear that recovery and reuse of materials become very difficult due to difficult separation thereof from electrode materials when they are used as separators in cells. In addition, since a step of cross-linkage is necessary after membrane molding, there is a problem that the process for production becomes complicated.
SUMMARY OF THE INVENTION
Under these circumstances, the present inventors have conducted extensive studies on polymer compounds having a disulfonylimide unit. As the result, they have found the facts that polymer compounds having a specif ic disulfonylimide unit, i.e. bis(arylsulfonyl)imide, in a main chain have a characteristic as the polymer electrolyte, are excellent in thermal resistance, can be easily formed membranes, and can be recovered as a material so that they have a good possibility for recycling, and additionally, the fact that said polymer compounds keep a high ion-conducting property when they are formed as a composite membrane with a porous membrane.
Accordingly, the present invention provides [1] a polymer electrolyte, which is excellent in practical use, having, in a main chain, a structural unit represented by the following formula (1):
-[Arl-(SO2-N-(X+)-SO2-Ar2 )m-SO2-N- (X+)-SO2-Arl-O]- (1) wherein Arland Ar 2 independently represent divalent aromatic groups , m represents an integer of 0 to 3, and X+ represents an ion selected from hydrogen ion, an alkali metal ion and ammonium ion.
The invention also provides [2]the polymer electrolyte of the above [ 1], further having, in a main chain, a structural unit represented by the following formula (2):
-[Ar3-O]- (2) wherein Ar3 represents a divalent aromatic group The invention provides [3] the polymer electrolyte of the above [2], further having, in a main chain, a structural unit represented by the following formula (2') which is different from the formula (2):
- [Ar4-O] - (21) wherein Ar4 represents a divalent aromatic group.
The invention further provides [4] a composite membrane comprising a polymer electrolyte of the above [1], 5[2] or [3], and a porous membrane, which is excellent in practical use.
The invention also provides processes for producing the above-described polymer electrolytes.
The invention also provides a disulfonyl compound of the formula (3' ) :
Z-Ar'- (SOZ-N- (X+) -SO2-Ar2) n-SO2-N- (X+) -SOZ-Arl-Z (31) wherein Arl, Ar 2 and X+ are as defined above; Z is halogen or nitro; and n is an integer of 1 to 3.
The invention further provides processes for producing the disulfonyl compound of the formula (3').
DETAILED DESCRIPTION OF THE INVENTION
Arl and Ar2 in the above formula (1) independently represent a divalent aromatic group. Examples of the divalent aromatic groups include the following groups.
The invention further provides [4] a composite membrane comprising a polymer electrolyte of the above [1], 5[2] or [3], and a porous membrane, which is excellent in practical use.
The invention also provides processes for producing the above-described polymer electrolytes.
The invention also provides a disulfonyl compound of the formula (3' ) :
Z-Ar'- (SOZ-N- (X+) -SO2-Ar2) n-SO2-N- (X+) -SOZ-Arl-Z (31) wherein Arl, Ar 2 and X+ are as defined above; Z is halogen or nitro; and n is an integer of 1 to 3.
The invention further provides processes for producing the disulfonyl compound of the formula (3').
DETAILED DESCRIPTION OF THE INVENTION
Arl and Ar2 in the above formula (1) independently represent a divalent aromatic group. Examples of the divalent aromatic groups include the following groups.
Oj ~
(R')a (R') b (R )c (R') b (R )c (R)a (R~)a (R~)a jY =Y =Y -(R~)a (R~)a ( I 1)a ( I 1 ) a wherein R' represents alkyl having 1 to 10 carbon atoms, alkoxy having 1 to 10 carbon atoms, halogenated alkyl having 1 to carbon atoms, aryl, acetyl, benzoyl, nitrile, sulf onic acid, carboxylic acid, phosphonic acid or halogen; a represents an integer of 0 to 4; b and c represent integers of 0 to 4, with the sum of b and c being an integer of 0 to 6; when a plurality of R's exist, they may be the same or dif ferent; Y represents - 4a -a direct bond, -0-, -S-, -C(O)-, -SO2- or -C(R3)2- wherein R3 represents hydrogen, alkyl having 1 to 10 carbon atoms or halogenated alkyl having 1 to 10 carbon atoms, aryl , with the two R3s being possible to be the same or different or to form a ring; and when a plurality of Ys exist, they may be the same or different.
Examples of alkyl having 1 to 10 carbon atoms include methyl, ethyl, propyl, phenyl, naphthyl and the like.
Examples of alkoxy having 1 to 10 carbon atoms include methoxy, ethoxy, and the like. Halogenated alkyl having 1 to 10 carbon atomsinclude trif luoromethyl, pentaf luoroethyl, and the like.
Examples of aryl include phenyl, naphthyl, phenoxy and the like. Examples of halogen include fluorine, chlorine and bromine.
Examples of halogenated alkyl having 1 to 10 carbon atoms for R3 include trifluoromethyl and the like. Examples of the ring formed by two R3s include cyclohexane ring, fluorene ring and the like.
The degree of ionic dissociation for sulfonylimide group varies depending on substituents on the adjacent aromatic groups Arl and Ar2, and the degree of ionic dissociation increases with increasing electron attracting property of the substituent. Therefore, compounds having a substituent of higher electron attracting property as Arl and Ar2, for example those having a halogen atom as a substituent, are preferred, and those having a fluorine atom as a substituent are more preferred. In particular, compounds wherein Arl or Ar2 are tertrafluorophenylene are particularly preferred because the degree of ionic dissociation for disulfonylimide group in this case is higher.
X+ includes hydrogen ion, an alkali metal ion and ammonium ion. When the polymer electrolyte is used in fuel cells, X+
is preferably hydrogen ion.
The polymer electrolyte of the invention is characterized in that it has a structural unit represented by the formula (1) as described above in the main chain. But usually the electrolyte has this structural unit together with another structural unit, and it may be an alternating copolymer, a random copolymer or a block copolymer.
Examples of preferred structural unit other than the structural unit represented by the formula (1) include structural unit s represented by the formula (2) , shown below, and the like. In addition to the structural unit of the formula (2), the electrolyte may have a structural unit different from this structural unit. Examples of such structural unit include structural units represented by the formula (2'), without particular limitation.
-[Ar3-O]- (2) -[Ar4-o]- (21) wherein Ar3 andAr4 independently represent a divalent aromatic group. The divalent aromatic group is has usually 6 to 24 carbon atoms, preferably 6 to 18 carbon atoms, and may have a substituent, such as methyl, ethyl, sulfonic acid group, etc.
Examples of the divalent aromatic groups include the groups as the same with Arl and Ar2 as described above.
The polymer electrolyte having structural units represented by the above formulae (1) and (2) can be produced, for example, by using a compound represented by the formula (3) shown below, an aromatic diol represented by the formula (4) shown below or the like and polymerizing them.
Z-Arl- ( SO2-N-(X+) -SOZ-Ar2)m-SO2-N-(X+) -SO2-Arl-Z (3) HO-Ar3-OH (4) wherein Arl, Ar2 , Ar3 , m and X+ represent the same meanings as above formula (1); and Z represents halogen or nitro.
Examples of halogen here include fluorine, chlorine, bromine and the like. Preferred examples are fluorine and chlorine, with fluorine being more preferred.
Typical examples of the aromatic diol represented by formula (4) include hydroquinone, resorcinol, catechol, 2-methylhydroquinone, 2,6-dimethylhydroquinone, 2-methoxyhydroquinone, 2-phenylhydroquinone, 2,6-diphenyihydroquinone, 2-sulfohydroquinone, 2,6-disulfohydroquinone, 2-methylresorcinol, 2,4-dimethylresorcinol, 2-phenyiresorcinol, 2,4-diphenylresorcinol, 1,2-dihydroxynaphthalene, 1,4-dihydroxynaphthalene, 1,5-dihydroxynaphthalene, 2,6-dihydroxynaphthalene, 2,7-dihydroxynaphthalene, 6,7-dihydroxy-2-naphthalenesulfonic acid, 2,7-dihydroxynaphthalene-3,6-disulfonic acid, 4,5-dihydroxynaphthalene-2,7-disulfonic acid, 4,4'-dihydroxybiphenyl, 4,4'-dihydroxy-3,3'-disulfobiphenyl, 4,4'-dihydroxy-3,3'-diphenylbiphenyl, 2,4'-dihydroxybiphenyl, 2,2'-dihydroxybiphenyl, 4,4'-dihydroxydiphenylmethane, 1,1-bis(4-hydroxyphenyl)ethane, 2,2-bis(4-hydroxyphenyl)propane, 2,2-bis(4-hydroxyphenyl)butane, 1,1-bis(4-hydroxyphenyl)cyclohexane, 2,2-bis(4-hydroxyphenyl)-1,1,1,3,3,3-hexafluoropropane, 1,1-bis(4-hydroxyphenyl)-1-phenylethane, bis(4-hydroxyphenyl)diphenylmethane, 9,9-bis(4-hydroxyphenyl)fluorene, 4,4'-dihydroxydiphenylether, bis(4-hydroxyphenyl)sulfide, bis(3,5-dimethyl-4-hydroxyphenyl)sulfide, 4,4'-dihydroxybenzophenone, 4,4'-dihydroxydiphenylsulfone, 4,4'-dihydroxy-3,3'-disulfodiphenylsulfone, bis(3,5-dimethyl-4-hydroxyphenyl)sulfone, alkali metal salts (sodium salt, potassium salt) of them and the like. Two or more of them can be used.
(R')a (R') b (R )c (R') b (R )c (R)a (R~)a (R~)a jY =Y =Y -(R~)a (R~)a ( I 1)a ( I 1 ) a wherein R' represents alkyl having 1 to 10 carbon atoms, alkoxy having 1 to 10 carbon atoms, halogenated alkyl having 1 to carbon atoms, aryl, acetyl, benzoyl, nitrile, sulf onic acid, carboxylic acid, phosphonic acid or halogen; a represents an integer of 0 to 4; b and c represent integers of 0 to 4, with the sum of b and c being an integer of 0 to 6; when a plurality of R's exist, they may be the same or dif ferent; Y represents - 4a -a direct bond, -0-, -S-, -C(O)-, -SO2- or -C(R3)2- wherein R3 represents hydrogen, alkyl having 1 to 10 carbon atoms or halogenated alkyl having 1 to 10 carbon atoms, aryl , with the two R3s being possible to be the same or different or to form a ring; and when a plurality of Ys exist, they may be the same or different.
Examples of alkyl having 1 to 10 carbon atoms include methyl, ethyl, propyl, phenyl, naphthyl and the like.
Examples of alkoxy having 1 to 10 carbon atoms include methoxy, ethoxy, and the like. Halogenated alkyl having 1 to 10 carbon atomsinclude trif luoromethyl, pentaf luoroethyl, and the like.
Examples of aryl include phenyl, naphthyl, phenoxy and the like. Examples of halogen include fluorine, chlorine and bromine.
Examples of halogenated alkyl having 1 to 10 carbon atoms for R3 include trifluoromethyl and the like. Examples of the ring formed by two R3s include cyclohexane ring, fluorene ring and the like.
The degree of ionic dissociation for sulfonylimide group varies depending on substituents on the adjacent aromatic groups Arl and Ar2, and the degree of ionic dissociation increases with increasing electron attracting property of the substituent. Therefore, compounds having a substituent of higher electron attracting property as Arl and Ar2, for example those having a halogen atom as a substituent, are preferred, and those having a fluorine atom as a substituent are more preferred. In particular, compounds wherein Arl or Ar2 are tertrafluorophenylene are particularly preferred because the degree of ionic dissociation for disulfonylimide group in this case is higher.
X+ includes hydrogen ion, an alkali metal ion and ammonium ion. When the polymer electrolyte is used in fuel cells, X+
is preferably hydrogen ion.
The polymer electrolyte of the invention is characterized in that it has a structural unit represented by the formula (1) as described above in the main chain. But usually the electrolyte has this structural unit together with another structural unit, and it may be an alternating copolymer, a random copolymer or a block copolymer.
Examples of preferred structural unit other than the structural unit represented by the formula (1) include structural unit s represented by the formula (2) , shown below, and the like. In addition to the structural unit of the formula (2), the electrolyte may have a structural unit different from this structural unit. Examples of such structural unit include structural units represented by the formula (2'), without particular limitation.
-[Ar3-O]- (2) -[Ar4-o]- (21) wherein Ar3 andAr4 independently represent a divalent aromatic group. The divalent aromatic group is has usually 6 to 24 carbon atoms, preferably 6 to 18 carbon atoms, and may have a substituent, such as methyl, ethyl, sulfonic acid group, etc.
Examples of the divalent aromatic groups include the groups as the same with Arl and Ar2 as described above.
The polymer electrolyte having structural units represented by the above formulae (1) and (2) can be produced, for example, by using a compound represented by the formula (3) shown below, an aromatic diol represented by the formula (4) shown below or the like and polymerizing them.
Z-Arl- ( SO2-N-(X+) -SOZ-Ar2)m-SO2-N-(X+) -SO2-Arl-Z (3) HO-Ar3-OH (4) wherein Arl, Ar2 , Ar3 , m and X+ represent the same meanings as above formula (1); and Z represents halogen or nitro.
Examples of halogen here include fluorine, chlorine, bromine and the like. Preferred examples are fluorine and chlorine, with fluorine being more preferred.
Typical examples of the aromatic diol represented by formula (4) include hydroquinone, resorcinol, catechol, 2-methylhydroquinone, 2,6-dimethylhydroquinone, 2-methoxyhydroquinone, 2-phenylhydroquinone, 2,6-diphenyihydroquinone, 2-sulfohydroquinone, 2,6-disulfohydroquinone, 2-methylresorcinol, 2,4-dimethylresorcinol, 2-phenyiresorcinol, 2,4-diphenylresorcinol, 1,2-dihydroxynaphthalene, 1,4-dihydroxynaphthalene, 1,5-dihydroxynaphthalene, 2,6-dihydroxynaphthalene, 2,7-dihydroxynaphthalene, 6,7-dihydroxy-2-naphthalenesulfonic acid, 2,7-dihydroxynaphthalene-3,6-disulfonic acid, 4,5-dihydroxynaphthalene-2,7-disulfonic acid, 4,4'-dihydroxybiphenyl, 4,4'-dihydroxy-3,3'-disulfobiphenyl, 4,4'-dihydroxy-3,3'-diphenylbiphenyl, 2,4'-dihydroxybiphenyl, 2,2'-dihydroxybiphenyl, 4,4'-dihydroxydiphenylmethane, 1,1-bis(4-hydroxyphenyl)ethane, 2,2-bis(4-hydroxyphenyl)propane, 2,2-bis(4-hydroxyphenyl)butane, 1,1-bis(4-hydroxyphenyl)cyclohexane, 2,2-bis(4-hydroxyphenyl)-1,1,1,3,3,3-hexafluoropropane, 1,1-bis(4-hydroxyphenyl)-1-phenylethane, bis(4-hydroxyphenyl)diphenylmethane, 9,9-bis(4-hydroxyphenyl)fluorene, 4,4'-dihydroxydiphenylether, bis(4-hydroxyphenyl)sulfide, bis(3,5-dimethyl-4-hydroxyphenyl)sulfide, 4,4'-dihydroxybenzophenone, 4,4'-dihydroxydiphenylsulfone, 4,4'-dihydroxy-3,3'-disulfodiphenylsulfone, bis(3,5-dimethyl-4-hydroxyphenyl)sulfone, alkali metal salts (sodium salt, potassium salt) of them and the like. Two or more of them can be used.
Amongst preferred are hydroquinone, 4,41-dihydroxybiphenyl, 2,2-bis(4-hydroxyphenyl)propane, 4,4'-dihydroxy-3,3'-diphenylbiphenyl, 4,4'-dihydroxydiphenylether, alkali metal salts of them and the like, because of their high reactivity.
The compound represented by the formula (3) as the other raw material can be produced in the following manner.
The compounds wherein m is 0 can easily be produced, for example, by reacting Z-Ar1-SO2C1 which is the corresponding sulfonyl chloride compound with Z-Arl-SO2NH2 which is the corresponding sulfonamide compound. Usually, the reaction is carried out in a solvent adjusting the pH value in the system to 7 to 8 and with addition of 2 times the equivalent or more of a base.
Examples of the solvent include acetone, 2-butanone, tetrahydrofuran, 1,4-dioxane, acetonitrile, N,N-dimethylacetamide, N,N-dimethylformamide, dimethylsulfoxide, a mixture of two or more of them and the like. Usable base includes sodium hydride, lithium hydride, triethylamine, pyridine, dime thylaminopyridine and the like.
The reaction temperature is preferably about 0 C to 150 C and more preferably 20 C to 80 C. The reaction period is usually about 1 hour to 20 hours.
The sulfonamide compound used here can be produced, for example, by reacting Z-Ar1-SO2C1 which is the corresponding sulfonyl chloride compound with ammonia, ammonium chloride or the like in the presence of two times the equivalent or more of a base.
Among the compound represented by the formula (3), the compound wherein m is 1 can easily be produced, for example, by reacting Z - Arl -S02NH2which is the sulfonamide compound with C1SO2-Ar2-S02C1 which is the corresponding bissulfonyl chloride compound, or by reacting Z-Ar1-S02C1 which is the sulfonyl chloride compound with NH2SO2-Ar2-SO2NH2 which is the corresponding bissulfonamide compound. The reaction is carried out, for example, under conditions similar to those for the compound wherein m is 0. The bissulfonamide compound used here can also be produced, for example, by reacting the corresponding bissulfonyl chloride compound with ammonia, ammonium chloride or the like.
Among the compound represented by the formula (3), the compound wherein m is 2 or 3 can be produced, for example, by reacting the bissulfonyl chloride compound and the bissulfonamide compound with the sulfonyl chloride compound or the sulfonamide compound in a ternary system. The length of oligomer chain can be adjusted by the molar ratio of compounds.
However, since increase in the molecular weight of the final polymer is tometimes difficult because of difficulty in purification at the stage of the compound (3) due to the distribution in chain length, it is preferred to use the compound (3) wherein m is 0 or m is 1.
Typical examples of the sulfonyl chloride compound used for the production of the compound (3) include 4-fluorobenzenesulfonyl chloride, 3-fluorobenzenesulfonyl chloride, 2-fluorobenzenesulfonyl chloride, difluorobenzenesulfonyl chloride, trifluorobenzenesulfonyl chloride, tetrafluorobenzenesulfonyl chloride, pentafluorobenzenesulfonyl chloride, 4-chlorobenzenesulfonyl chloride, 3-chlorobenzenesulfonyl chloride, 2-chlorobenzenesulfonyl chloride, dichlorobenzenesulfonyl chloride, trichlorobenzenesulfonyl chloride, 4-bromobenzenesulfonyl chloride, 3-bromobenzenesulfonyl chloride, 2-bromobenzenesulfonyl chloride, dibromobenzenesulfonyl chloride, 4-nitrobenzenesulfonyl chloride, 3-nitrobenzenesulfonyl chloride and the like. Two or more of them can be used. In addition, sulfonyl fluoride compounds can be used in place of these sulfonyl chloride compounds.
Typical examples of the bissulfonyl chloride compound used for the production of the compound (3) include 1,4-benzenedisulfonyl chloride, 1,3-benzenedisulfonyl chloride, 1,2-benzenedisulfonyl chloride, 4,41-biphenyldisulfonyl chloride, naphthalenedisulfonyl chloride and the like. Two or more of them can be used. In addition, bissulfonyl fluoride compounds can be used in place of these bissulfonyl chloride compounds.
The polymer electrolyte of the invention can be produced by using a compound represented by the formula (3), an aromatic diol represented by the formula (4) or the like, described above, as the raw materials and polymerizing them. Specific process for the production is not particularly limited and includes for example, [1] a process in which a compound represented by the above formula (3) and an aromatic diol represented by the above formula (4) are reacted; [ 2] a process in which a compound represented by the above formula (3), an aromatic diol represented by the above formula (4) and a compound represented by the formula (5) shown below are reacted; [ 3] a process in which a compound represented by the above formula (3) and an aromatic diol represented by the above formula (4) are reacted, followed by the reaction with a compound having a hydroxyl group represented by the formula (6) shown below; [ 4] a process in which a compound represented by the above formula (3) and an aromatic diol represented by the above formula (4) are reacted, followed by the reaction with a compound represented by the formula (7) shown below;
[5] a process in which a compound represented by the above formula (3) and an aromatic diol represented by the above formula (4) are reacted, followed by the reaction with a compound represented by the formula (5) shown below and a compound having a hydroxyl group represented by the formula (6) shown below; [ 6] a process in which a compound represented by the above formula (3) and an aromatic diol represented by the above formula (4) are reacted, followed by the reaction with an aromatic diol represented by the above formula (4) and a compound represented by the formula (7) shown below;
and the like, in the presence of an alkali.
W-Ar4-W (5) HO-[Ar5-0] j-H (6) W-[Ar6-0]j-Ar6-W (7) wherein Ar4 represents the same meanings as above; Ar5 and Arfi independently represent a divalent aromatic group ; and W represents halogen or nitro; and j represents an integer of 1 to 5000. The divalent aromatic group is has usually 6 to 24 carbon atoms, preferably 6 to 18 carbon atoms, and may have a substituent, such as methyl, phenyl, halogen, etc.
Examples of halogen include fluorine, chlorine, bromine and the like.
Examples of halogen (W) used in formula (5) or (7) include fluorine, chlorine, bromine and the like.
Typical examples of the compound represented by the formula (5) include 4,4'-difluorobenzophenone, 4,4'-dichlorobenzophenone, 2,4-difluorobenzophenone, 4,4'-dibromobenzophenone, 3,4'-dinitrobenzophenone, 4,4'-difluorodiphenylsuifone, 4,4'-difluoro-3,3'-disulfodiphenylsulfone, dipotassium salt of4,4'-difluoro-3,3'-disulfodiphenylsulfone,disodium salt of 4, 4' -difluoro-3, 3' -disulfodiphenylsulfone, 4,4'-dichlorodiphenylsulfone, 4,4'-dichloro-3,3'-disulfodiphenylsulfone, dipotassium salt of4,4'-dichloro-3,3'-disulfodiphenylsulfone,disodium salt of 4,4'-dichloro-3,31-disulfodiphenylsulfone, 4,4'-dibromodiphenylsulfone, 4,4'-dinitrodiphenylsulfone, 2,6-difluorobenzonitrile, 2,6-dichlorobenzonitrile, hexafluorobenzene, decafluorobiphenyl, octafluoronaphthalene and the like. Two or more of them can be used.
Amongst them, 4,4'-difluorobenzophenone, 4,4'-difluorodiphenylsulfone, 4,4'-dichlorodiphenylsulfone, decafluorobiphenyl and the like are preferred.
Examples of Ars in the compound having a hydroxyl group represented by the formula (6) include the same divalent aromatic group as described above. Ar5 may be the same as or be different from Ar3, Ar4 and the like. Examples of the compound (6) having a hydroxyl group are not particularly limited and include aromatic polymers such as polyphenylene ethers, polyether ketones, polyether-ether ketones, polysulf ones, polyether sulf ones, polyphenylene sulfides and the like having a hydroxyl group at their terminal. Two or more of them can be used.
The compound represented by the formula (3) as the other raw material can be produced in the following manner.
The compounds wherein m is 0 can easily be produced, for example, by reacting Z-Ar1-SO2C1 which is the corresponding sulfonyl chloride compound with Z-Arl-SO2NH2 which is the corresponding sulfonamide compound. Usually, the reaction is carried out in a solvent adjusting the pH value in the system to 7 to 8 and with addition of 2 times the equivalent or more of a base.
Examples of the solvent include acetone, 2-butanone, tetrahydrofuran, 1,4-dioxane, acetonitrile, N,N-dimethylacetamide, N,N-dimethylformamide, dimethylsulfoxide, a mixture of two or more of them and the like. Usable base includes sodium hydride, lithium hydride, triethylamine, pyridine, dime thylaminopyridine and the like.
The reaction temperature is preferably about 0 C to 150 C and more preferably 20 C to 80 C. The reaction period is usually about 1 hour to 20 hours.
The sulfonamide compound used here can be produced, for example, by reacting Z-Ar1-SO2C1 which is the corresponding sulfonyl chloride compound with ammonia, ammonium chloride or the like in the presence of two times the equivalent or more of a base.
Among the compound represented by the formula (3), the compound wherein m is 1 can easily be produced, for example, by reacting Z - Arl -S02NH2which is the sulfonamide compound with C1SO2-Ar2-S02C1 which is the corresponding bissulfonyl chloride compound, or by reacting Z-Ar1-S02C1 which is the sulfonyl chloride compound with NH2SO2-Ar2-SO2NH2 which is the corresponding bissulfonamide compound. The reaction is carried out, for example, under conditions similar to those for the compound wherein m is 0. The bissulfonamide compound used here can also be produced, for example, by reacting the corresponding bissulfonyl chloride compound with ammonia, ammonium chloride or the like.
Among the compound represented by the formula (3), the compound wherein m is 2 or 3 can be produced, for example, by reacting the bissulfonyl chloride compound and the bissulfonamide compound with the sulfonyl chloride compound or the sulfonamide compound in a ternary system. The length of oligomer chain can be adjusted by the molar ratio of compounds.
However, since increase in the molecular weight of the final polymer is tometimes difficult because of difficulty in purification at the stage of the compound (3) due to the distribution in chain length, it is preferred to use the compound (3) wherein m is 0 or m is 1.
Typical examples of the sulfonyl chloride compound used for the production of the compound (3) include 4-fluorobenzenesulfonyl chloride, 3-fluorobenzenesulfonyl chloride, 2-fluorobenzenesulfonyl chloride, difluorobenzenesulfonyl chloride, trifluorobenzenesulfonyl chloride, tetrafluorobenzenesulfonyl chloride, pentafluorobenzenesulfonyl chloride, 4-chlorobenzenesulfonyl chloride, 3-chlorobenzenesulfonyl chloride, 2-chlorobenzenesulfonyl chloride, dichlorobenzenesulfonyl chloride, trichlorobenzenesulfonyl chloride, 4-bromobenzenesulfonyl chloride, 3-bromobenzenesulfonyl chloride, 2-bromobenzenesulfonyl chloride, dibromobenzenesulfonyl chloride, 4-nitrobenzenesulfonyl chloride, 3-nitrobenzenesulfonyl chloride and the like. Two or more of them can be used. In addition, sulfonyl fluoride compounds can be used in place of these sulfonyl chloride compounds.
Typical examples of the bissulfonyl chloride compound used for the production of the compound (3) include 1,4-benzenedisulfonyl chloride, 1,3-benzenedisulfonyl chloride, 1,2-benzenedisulfonyl chloride, 4,41-biphenyldisulfonyl chloride, naphthalenedisulfonyl chloride and the like. Two or more of them can be used. In addition, bissulfonyl fluoride compounds can be used in place of these bissulfonyl chloride compounds.
The polymer electrolyte of the invention can be produced by using a compound represented by the formula (3), an aromatic diol represented by the formula (4) or the like, described above, as the raw materials and polymerizing them. Specific process for the production is not particularly limited and includes for example, [1] a process in which a compound represented by the above formula (3) and an aromatic diol represented by the above formula (4) are reacted; [ 2] a process in which a compound represented by the above formula (3), an aromatic diol represented by the above formula (4) and a compound represented by the formula (5) shown below are reacted; [ 3] a process in which a compound represented by the above formula (3) and an aromatic diol represented by the above formula (4) are reacted, followed by the reaction with a compound having a hydroxyl group represented by the formula (6) shown below; [ 4] a process in which a compound represented by the above formula (3) and an aromatic diol represented by the above formula (4) are reacted, followed by the reaction with a compound represented by the formula (7) shown below;
[5] a process in which a compound represented by the above formula (3) and an aromatic diol represented by the above formula (4) are reacted, followed by the reaction with a compound represented by the formula (5) shown below and a compound having a hydroxyl group represented by the formula (6) shown below; [ 6] a process in which a compound represented by the above formula (3) and an aromatic diol represented by the above formula (4) are reacted, followed by the reaction with an aromatic diol represented by the above formula (4) and a compound represented by the formula (7) shown below;
and the like, in the presence of an alkali.
W-Ar4-W (5) HO-[Ar5-0] j-H (6) W-[Ar6-0]j-Ar6-W (7) wherein Ar4 represents the same meanings as above; Ar5 and Arfi independently represent a divalent aromatic group ; and W represents halogen or nitro; and j represents an integer of 1 to 5000. The divalent aromatic group is has usually 6 to 24 carbon atoms, preferably 6 to 18 carbon atoms, and may have a substituent, such as methyl, phenyl, halogen, etc.
Examples of halogen include fluorine, chlorine, bromine and the like.
Examples of halogen (W) used in formula (5) or (7) include fluorine, chlorine, bromine and the like.
Typical examples of the compound represented by the formula (5) include 4,4'-difluorobenzophenone, 4,4'-dichlorobenzophenone, 2,4-difluorobenzophenone, 4,4'-dibromobenzophenone, 3,4'-dinitrobenzophenone, 4,4'-difluorodiphenylsuifone, 4,4'-difluoro-3,3'-disulfodiphenylsulfone, dipotassium salt of4,4'-difluoro-3,3'-disulfodiphenylsulfone,disodium salt of 4, 4' -difluoro-3, 3' -disulfodiphenylsulfone, 4,4'-dichlorodiphenylsulfone, 4,4'-dichloro-3,3'-disulfodiphenylsulfone, dipotassium salt of4,4'-dichloro-3,3'-disulfodiphenylsulfone,disodium salt of 4,4'-dichloro-3,31-disulfodiphenylsulfone, 4,4'-dibromodiphenylsulfone, 4,4'-dinitrodiphenylsulfone, 2,6-difluorobenzonitrile, 2,6-dichlorobenzonitrile, hexafluorobenzene, decafluorobiphenyl, octafluoronaphthalene and the like. Two or more of them can be used.
Amongst them, 4,4'-difluorobenzophenone, 4,4'-difluorodiphenylsulfone, 4,4'-dichlorodiphenylsulfone, decafluorobiphenyl and the like are preferred.
Examples of Ars in the compound having a hydroxyl group represented by the formula (6) include the same divalent aromatic group as described above. Ar5 may be the same as or be different from Ar3, Ar4 and the like. Examples of the compound (6) having a hydroxyl group are not particularly limited and include aromatic polymers such as polyphenylene ethers, polyether ketones, polyether-ether ketones, polysulf ones, polyether sulf ones, polyphenylene sulfides and the like having a hydroxyl group at their terminal. Two or more of them can be used.
Examples of Ar6 in the compound represented by the f ormula (7) include the same divalent aromatic group as described above. Ar6 may be the same as or be different from Ar3, Ar4, Ar5 and the like. Examples of such compound (7) are not particularly limited and include aromatic polymers such as polyphenylene ethers, polyether ketones, polyether-ether ketones, polysulfones, polyether sulfones, polyphenylene sulfides and the like having a halogen or a nitro group at their terminal. Two or more of them can be used together.
The number average molecular weight of the compounds (6) and (7) described above is preferably 2,000 to 500,000, more preferably 5, 000 to 200, 000, and most preferably 8, 000 to 100,000. When the number average molecular weight is smaller than 2, 000, sometimes the membrane strength or thermal resistance of the block copolymer becomes lowered, and when the number average molecular weight is more than 500,000, sometimes the solubility becomes lowered.
The polymerization reaction can be carried out according to a known process in which the reaction is realized in the co-presence of an alkali. Any known alkali having a polymerization activity can be used as the alkali here.
Preferably used alkalis include alkali metal hydroxides, alkali metal carbonates and the like. Among them, potassium carbonate is preferred.
In addition, while the polymerization reaction may be carried out in a molten state without solvent, the reaction preferably carried out in a solvent. Usable solvents include aromatic hydrocarbon solvents, ether solvents, ketone solvents, amide solvents, sulfone solvents, sulfoxide solvents and the like, with dimethylsulfoxide, sulfolane, N,N-dimethylformamide, N,N-dimethylacetamide, N-methylpyrrolidone, N,N'-dimethylimidazolidinone, diphenylsulfone and the like being preferred.
The reaction temperature for the polymerization reaction is usually 20 C to 300 C, preferably 50 C to 200 C.
In view of the heat resistance and strength of the film, the number average molecular weight of the polymer is preferably 5000 to 1000000, and more preferably 10000 to 500000.
The polymer electrolyte can be taken out, for example, by adding dropwise the reaction solution after completion of the reaction into a non-solvent for the polymer to form precipitates, which are filtered or decanted. Examples of the non-solvent include methanol, water, hydrochloric acid, diethyl ether, acetone and the like. They can be used independently, and in a mixture of two or more, if necessary.
Particularly preferred are water, methanol, a mixture of hydrochloric acid and methanol, a mixture of hydrochloric acid and water, and the like.
In addition, a substituent can be introduced on an aromatic ring after the polymerization. For example, sulfonic acid group can be introduced by reacting the obtained polymer electrolyte with concentrated sulfuric acid, fuming sulfuric acid, chlorosulfonic acid or the like.
The polymer electrolytes of the invention having the structural units represented by the formulae (1) in the main chain are produced in the above manner, and when the polymer electrolytes of the.invention are used as a separator in electrochemical devices such as lithium cell, fuel cell and the like, they are usually used in the form of films . Processes for transforming the polymer electrolytes of the invention into films are not particularly limited and a process in which a film is produced from a solution (solvent casting process) is preferred.
Specific examples of the solvent casting process include a process in which a polymer electrolyte is dissolved in an appropriate solvent, the solution is casted by applying it on a glass plate, a Teflori plate or the like, and removzng the solventw.ith heating under reduced pressure, if necessary, to form a membrane.
The solvents used for the production of membranes are not particularly limited as =far as they can dissolve the polymer electrolyte and can be removed thereafter, and preferred examples include aprotic polar solvents such as N,N-dimethylformamide, N,N-dimethylacetamide, N-methyl-2-pyrrolidone, dimethylsulfoxide and the like;
*Trade-mark chlorinated solvents such as dichioromethane, chloroform, 1,2-dichioroethane, chlorobenzene, dichlorobenzene and the like; alcohols such as methanol, ethanol, propanol and the like; and alkylene glycol monoalkyl ethers such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether and the like. They can be used independently, and in amixture of two ormore, if necessary. Particularly preferred among them are N,N-dimethylformamide,N,N-dimethylacetamide, N-methylpyrrolidone, dimethylsulfoxide, a mixed solvent of methylene chloride and methanol and the like, because of their high solubility for the polymer electrolytes.
The thickness of films is not particularly limited and preferably 10 to 200 jem, more preferably 20 to 150 m. When the film has a thickness less than 10 m, the practical strength is not sufficient, sometimes. When the film has a thickness greater than 200 p,m, the film has a tendency to a too greater membrane resistance causing insufficient properties of electrochemical devices. The membrane thickness can be controlled by the concentration of the polymer electrolyte solution and the thickness of the coating on substrate.
In addition, any solvents, salts or the like contained in the membrane can be removed by washing the membrane obtained in the above manner with, for example, ion-exchange water.
An electrolyte membrane of the formula (1) wherein X+ is H+
The number average molecular weight of the compounds (6) and (7) described above is preferably 2,000 to 500,000, more preferably 5, 000 to 200, 000, and most preferably 8, 000 to 100,000. When the number average molecular weight is smaller than 2, 000, sometimes the membrane strength or thermal resistance of the block copolymer becomes lowered, and when the number average molecular weight is more than 500,000, sometimes the solubility becomes lowered.
The polymerization reaction can be carried out according to a known process in which the reaction is realized in the co-presence of an alkali. Any known alkali having a polymerization activity can be used as the alkali here.
Preferably used alkalis include alkali metal hydroxides, alkali metal carbonates and the like. Among them, potassium carbonate is preferred.
In addition, while the polymerization reaction may be carried out in a molten state without solvent, the reaction preferably carried out in a solvent. Usable solvents include aromatic hydrocarbon solvents, ether solvents, ketone solvents, amide solvents, sulfone solvents, sulfoxide solvents and the like, with dimethylsulfoxide, sulfolane, N,N-dimethylformamide, N,N-dimethylacetamide, N-methylpyrrolidone, N,N'-dimethylimidazolidinone, diphenylsulfone and the like being preferred.
The reaction temperature for the polymerization reaction is usually 20 C to 300 C, preferably 50 C to 200 C.
In view of the heat resistance and strength of the film, the number average molecular weight of the polymer is preferably 5000 to 1000000, and more preferably 10000 to 500000.
The polymer electrolyte can be taken out, for example, by adding dropwise the reaction solution after completion of the reaction into a non-solvent for the polymer to form precipitates, which are filtered or decanted. Examples of the non-solvent include methanol, water, hydrochloric acid, diethyl ether, acetone and the like. They can be used independently, and in a mixture of two or more, if necessary.
Particularly preferred are water, methanol, a mixture of hydrochloric acid and methanol, a mixture of hydrochloric acid and water, and the like.
In addition, a substituent can be introduced on an aromatic ring after the polymerization. For example, sulfonic acid group can be introduced by reacting the obtained polymer electrolyte with concentrated sulfuric acid, fuming sulfuric acid, chlorosulfonic acid or the like.
The polymer electrolytes of the invention having the structural units represented by the formulae (1) in the main chain are produced in the above manner, and when the polymer electrolytes of the.invention are used as a separator in electrochemical devices such as lithium cell, fuel cell and the like, they are usually used in the form of films . Processes for transforming the polymer electrolytes of the invention into films are not particularly limited and a process in which a film is produced from a solution (solvent casting process) is preferred.
Specific examples of the solvent casting process include a process in which a polymer electrolyte is dissolved in an appropriate solvent, the solution is casted by applying it on a glass plate, a Teflori plate or the like, and removzng the solventw.ith heating under reduced pressure, if necessary, to form a membrane.
The solvents used for the production of membranes are not particularly limited as =far as they can dissolve the polymer electrolyte and can be removed thereafter, and preferred examples include aprotic polar solvents such as N,N-dimethylformamide, N,N-dimethylacetamide, N-methyl-2-pyrrolidone, dimethylsulfoxide and the like;
*Trade-mark chlorinated solvents such as dichioromethane, chloroform, 1,2-dichioroethane, chlorobenzene, dichlorobenzene and the like; alcohols such as methanol, ethanol, propanol and the like; and alkylene glycol monoalkyl ethers such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether and the like. They can be used independently, and in amixture of two ormore, if necessary. Particularly preferred among them are N,N-dimethylformamide,N,N-dimethylacetamide, N-methylpyrrolidone, dimethylsulfoxide, a mixed solvent of methylene chloride and methanol and the like, because of their high solubility for the polymer electrolytes.
The thickness of films is not particularly limited and preferably 10 to 200 jem, more preferably 20 to 150 m. When the film has a thickness less than 10 m, the practical strength is not sufficient, sometimes. When the film has a thickness greater than 200 p,m, the film has a tendency to a too greater membrane resistance causing insufficient properties of electrochemical devices. The membrane thickness can be controlled by the concentration of the polymer electrolyte solution and the thickness of the coating on substrate.
In addition, any solvents, salts or the like contained in the membrane can be removed by washing the membrane obtained in the above manner with, for example, ion-exchange water.
An electrolyte membrane of the formula (1) wherein X+ is H+
is obtained by immersing the membrane in hydrochloric acid and then washing it with ion-exchange water.
The ion exchange capacity of the polymer electrolyte (molar number of acidic group per 1 g of the polymer electrolyte) is preferably 0.5 meq/g to 3.0 meq/g and more preferably 0.8 meq/g to 1.8 meq/g. When the ion exchange capacity is less than 0. 5 meq/g, sometimes asufficient ion-conducting property cannot be obtained and the performance as a polymer electrolyte is lowered. When the ion exchange capacity is greater than 3.0 meq/g, sometimes the water resistance is lowered.
Furthermore, in the present invention, a plasticizer, stabilizer, release agent or the like usually used in the polymer can be added to the polymer electrolyte of the invention for the purpose of improvement in various physical properties of the film. In addition, it is also possible to make a complex alloy of the polymer electrolyte with another polymer by the mixed co-casting process in the same solvent or other processes.
In particular, co-use of an aromatic polyimide is preferred and, by such a co-use, the film strength, water resistance or the like can be improved.
Methods containing addition of a low molecular electrolyte, an acid compound, or another polymer electrolyte, and impregnation of a solvent or else have been known for the purpose of improving the ion-conducting property or others.
Furthermore, in the fuel cell use, in order to make easy the water control, addition of inorganic or organic fine particles is known as the water retention agent. All these known techniques can also be used as far as the purpose of the invention is not damaged.
Additionally, in the present invention, the product can be cross-linked by irradiating an electron beam, radiation or the like for the purpose of improvement in the mechanical strength of the film. Furthermore, reinforcement of the film is known by impregnating the porous film or sheet (porous membrane) to form a composite material or by mixing a fiber or pulp. All these known techniques can also be used as far as the purpose of the invention is not damaged.
Since the porous membrane is used in order to further improvement in the strength, flexibility and durability, any membrane can be used as far as it meets the purpose of use irrespective of its shape and material. When it is used as a separator in the solid polymer type fuel cell, the membrane thickness is usually 1 to 100 lim, preferably 3 to 30 m, more preferably 5 to 20 gm, the pore diameter is usually 0.01 to tn, preferably 0.02 to 7 pm, and the porosity is usually to 98%, preferably 30 to 95%. The material for the porous membrane is preferably an aliphatic polymer or a fluorine-containing polymer, from the viewpoint of thermal resistance and in view of reinforcing effect on the mechanical strength.
The ion exchange capacity of the polymer electrolyte (molar number of acidic group per 1 g of the polymer electrolyte) is preferably 0.5 meq/g to 3.0 meq/g and more preferably 0.8 meq/g to 1.8 meq/g. When the ion exchange capacity is less than 0. 5 meq/g, sometimes asufficient ion-conducting property cannot be obtained and the performance as a polymer electrolyte is lowered. When the ion exchange capacity is greater than 3.0 meq/g, sometimes the water resistance is lowered.
Furthermore, in the present invention, a plasticizer, stabilizer, release agent or the like usually used in the polymer can be added to the polymer electrolyte of the invention for the purpose of improvement in various physical properties of the film. In addition, it is also possible to make a complex alloy of the polymer electrolyte with another polymer by the mixed co-casting process in the same solvent or other processes.
In particular, co-use of an aromatic polyimide is preferred and, by such a co-use, the film strength, water resistance or the like can be improved.
Methods containing addition of a low molecular electrolyte, an acid compound, or another polymer electrolyte, and impregnation of a solvent or else have been known for the purpose of improving the ion-conducting property or others.
Furthermore, in the fuel cell use, in order to make easy the water control, addition of inorganic or organic fine particles is known as the water retention agent. All these known techniques can also be used as far as the purpose of the invention is not damaged.
Additionally, in the present invention, the product can be cross-linked by irradiating an electron beam, radiation or the like for the purpose of improvement in the mechanical strength of the film. Furthermore, reinforcement of the film is known by impregnating the porous film or sheet (porous membrane) to form a composite material or by mixing a fiber or pulp. All these known techniques can also be used as far as the purpose of the invention is not damaged.
Since the porous membrane is used in order to further improvement in the strength, flexibility and durability, any membrane can be used as far as it meets the purpose of use irrespective of its shape and material. When it is used as a separator in the solid polymer type fuel cell, the membrane thickness is usually 1 to 100 lim, preferably 3 to 30 m, more preferably 5 to 20 gm, the pore diameter is usually 0.01 to tn, preferably 0.02 to 7 pm, and the porosity is usually to 98%, preferably 30 to 95%. The material for the porous membrane is preferably an aliphatic polymer or a fluorine-containing polymer, from the viewpoint of thermal resistance and in view of reinforcing effect on the mechanical strength.
Examples of the aliphatic polymer include polyethylene, polypropylene, ethylene-propylene copolymer and the like.
The polyethylene referred to here means an ethylene polymer having a polyethylene crystal structure and includes, for example, a copolymer of ethylene and another monomer.
Specifically included is a copolymer of ethylene and an a-olefin, called linear low density polyethylene (LLDPE).
The polypropylene referred to here means a propylene polymer having a polypropylene crystal structure and includes generally used propylene block copolymers, random copolymers and the like (which are copolymers with ethylene and 1-butene).
As the fluorine-containing porous membrane, any thermoplastic resins having at least one carbon-fluorine bond in the molecule can be used without limitation. Usually, resins having a structure in which all or most of hydrogen atoms in the aliphatic polymer is replaced by fluorine atoms are preferably used. Examples include polytrifluoroethylene, polytetrafluoroethylene, polychlorotrifluoroethylene, poly(tetrafluoroethylene-hexafluoropropylene), poly(tetrafluoroethylene-perfluoroalkyl ether), polyvinylidene fluoride and the like. Among them, polytetrafluoroethylene and poly(tetrafluoroethylene-hexafluoropropylene) are preferred, with polytetrafluoroethylene being particularly preferred. These fluorine resins preferably have an average molecular weight of 100,000 or more, in view of their good mechanical strength.
Methods for making a composite material with a porous membrane are not particularly limited. Examples include a method in which a porous membrane is immersed in a solution of a polymer electrolyte, taken out and then freed from the solvent to give a composite membrane; a method in which a solution of a polymer electrolyte is applied onto a porous membrane and then freed from the solvent to give a composite membrane; a method in which a porous membrane is brought into contact with a solution of a polymer electrolyte under reduced pressure, then the solution is impregnated into pores of the porous membrane by applying the ordinary pressure, and the membrane is freed from the solvent to give a composite membrane ;
and others.
The fuel cell according to the present invention is described below.
The fuel cell of the invention is obtained by installing, into a cell, a membrane-electrodes assembly comprising an anode and a cathode comprising gas diffusion electrodes containing a catalyst and a polymer electrolyte placed between the anode and the cathode, said assembly being inserted between separators comprising a conductive carbon plate having a groove acting as a conduit for hydrogen gas, air or oxygen gas.
The polyethylene referred to here means an ethylene polymer having a polyethylene crystal structure and includes, for example, a copolymer of ethylene and another monomer.
Specifically included is a copolymer of ethylene and an a-olefin, called linear low density polyethylene (LLDPE).
The polypropylene referred to here means a propylene polymer having a polypropylene crystal structure and includes generally used propylene block copolymers, random copolymers and the like (which are copolymers with ethylene and 1-butene).
As the fluorine-containing porous membrane, any thermoplastic resins having at least one carbon-fluorine bond in the molecule can be used without limitation. Usually, resins having a structure in which all or most of hydrogen atoms in the aliphatic polymer is replaced by fluorine atoms are preferably used. Examples include polytrifluoroethylene, polytetrafluoroethylene, polychlorotrifluoroethylene, poly(tetrafluoroethylene-hexafluoropropylene), poly(tetrafluoroethylene-perfluoroalkyl ether), polyvinylidene fluoride and the like. Among them, polytetrafluoroethylene and poly(tetrafluoroethylene-hexafluoropropylene) are preferred, with polytetrafluoroethylene being particularly preferred. These fluorine resins preferably have an average molecular weight of 100,000 or more, in view of their good mechanical strength.
Methods for making a composite material with a porous membrane are not particularly limited. Examples include a method in which a porous membrane is immersed in a solution of a polymer electrolyte, taken out and then freed from the solvent to give a composite membrane; a method in which a solution of a polymer electrolyte is applied onto a porous membrane and then freed from the solvent to give a composite membrane; a method in which a porous membrane is brought into contact with a solution of a polymer electrolyte under reduced pressure, then the solution is impregnated into pores of the porous membrane by applying the ordinary pressure, and the membrane is freed from the solvent to give a composite membrane ;
and others.
The fuel cell according to the present invention is described below.
The fuel cell of the invention is obtained by installing, into a cell, a membrane-electrodes assembly comprising an anode and a cathode comprising gas diffusion electrodes containing a catalyst and a polymer electrolyte placed between the anode and the cathode, said assembly being inserted between separators comprising a conductive carbon plate having a groove acting as a conduit for hydrogen gas, air or oxygen gas.
Said catalyst is not particularly limited as far as it can activate the oxidation-reduction reaction of hydrogen or oxygen and may be a known product. Preferred product is fine powders of platinum or fine powders of platinum alloy. Said powders are often carried on a particulate or fibrous carbon such as activated carbon or graphite.
Gas diffusion layers in said gas diffusion electrodes may also be known materials and preferably a porous carbon nonwoven fabric or carbon paper.
Methods for producing a membrane-electrode assembly may be known processes. Examples include a method in which two plates are formed having a gas diffusion layer and a catalyst bound thereto, and a polymer electrolyte membrane is inserted and bound between them; and a method in which a catalyst is bound to a polymer electrolyte membrane and the obtained assembly is inserted and bound between gas diffusion layers.
EXAMPLES
The invention will now be described with reference to Examples, which should not be construed as a limitation upon the invention.
Methods of measurement (1) 10% weight loss temperature:
Using a thermogravimetric analyzer (TGA-50, manufactured by Shimadzu Corporation), 10% weight loss temperature was measured in the condition of a temperature raising rate of 10t/min under nitrogen atmosphere.
(2) Molecular weight (Mn):
Polystyrene-reduced number average molecular weight was measured by GPC (HLC-8020 (manuf actured by TOSOH Corporation) equipped with a UV detector (UV-8010 manufactured by TOSOH) ) with using a solvent of N,N-dimethylacetamide containing 0. 05M
LiBr.
(3) Ion exchange capacity:
After a polymer electrolyte film was immersed in O.1N
NaOH aqueous solution, neutralization titration of said aqueous solution with0.iN HC1 aqueous solution was conducted, and the value of ion exchange capacity was calculated.
(4) Proton conductivity:
With using a SI 1260 high performance IMPEDANCE/GAIN-PHASE ANALYZER (manufactured by Solartoron Company) and a 128 7 type potentiostat (ELECTROCHEMICAL INTERFACE, manufactured by Solartoron Company), proton conductivity was measured by AC impedance method in a thermo-hygrostat oven at 800C
and 90%RH.
Synthesis Example 1 (Synthesis Example of a disulfonylimide) To an aqueous solution of ammonium chloride was added dropwise an acetone solution of 1,3-benzenedisulfonyl chloride at room temperature. During addition, pH was adjusted to 7 with an aqueous sodium hydroxide solution.
Precipitated product was filtered and recrystallized from ethanol to give 1,3-benzenedisulfonamide. The structure was confirmed by 1H-NMR and IR.
Then, 4 times bymole of NaH was added to a tetrahydrofuran solution of 1,3-benzenedisulfonamide. Subsequently, 2 times by mole of pentafluorobenzenesulfonyl chloride was gradually added to the mixture and allowed to react at 60 C . The reaction mass was filtered and the filtrate was concentrated. The residue was dissolved in methanol and combined with a methanol solution of KOH to give the desired sulfonylimide (may be referred to as BSI 1) in the form of potassium salt. Theproduct was recrystallized from a mixed solvent of acetone and methanol.
F F K+ ` K+ F F
F SO2-N=S02 ~~ S02-N=SO2 ~ ~ F
F F F F
1H-NMR (ppm) : 7.52, 7.64, 7.71; 19F-NMR (ppm) : -129, -143, -154.
Example 1 (An alternating copolymer comprising BSI 1 and biphenol) Into a flask were placed 0.500 g of BSI 1, 0.121 g of 4,4'-dihydroxybiphenyl, 94~mg of potassium carbonate and 3 ml of dimethylsuifoxide (hereinafter, referred to as DMSO) under nitrogen stream and they were heated with stirring at 100 C for 18 hours. The reaction solution was added dropwise to 10% aqueous hydrochloric acid solution. The obtained precipitates were collected by filtration, washed with methanol and then dried under reduced pressure at 60 C to give 0.48 g of a disulfonylimide polymer in the form of a white solid. The result of molecular weight measurement (converted to polystyrene) is shown in Table 1.
The obtained polymer was dissolved in DMAc to a concentration of about 10$ by weight, casted in a glass dish and dried at 80 C for removing the solvent to give a colorless and transparent tough film having a thickness of 105 m. The proton conductivity of the film was measured by alternating current method under conditions including a temperature of 80 C and a humidity of 90%. Additionally, the ion exchange capacity was measured by titration method. The results are collectively shown in Table 1.
Example 2 (A random copolymer comprising BSI 1, Bisphenol A and decafluorobiphenyl) Into a flask were placed 0.773 g of BSI 1, 0.435 g of Bisphenol A, 0.334 g of decafluorobiphenyl, 0.290 g of potassium carbonate and 7.5 ml of DMSO under nitrogen stream and they were heated with stirring at 80 C for 30 hours. After completion of the reaction, the reaction solution was added dropwise to 10% methanolic hydrochloric acid solution. The obtained precipitates were collected by filtration, washed with methanol and then dried under reduced pressure at 60 C
to give 0.93 g of a disulfonylimide polymer in the form of a pale brown solid. The results of measurement for molecular weight and 10% weight loss temperature are shown in Table 1.
The obtained polymer was converted into a film in the same manner as that in Example 1 to give a transparent and pale brown tough film having a thickness of 36 m. The results of measurement for proton conductivity and the ion exchange capacity of the film are collectively shown in Table 1.
Example 3 (A block copolymer formed by reacting a disulfonylimide oligomer having terminal fluorine groups and composed of BSI
1 and Bisphenol A with a polyether sulfone having terminal hydroxy groups) A polyether sulf one oligomer (molecular weight Mn: 2.0 x 10 ) having terminal hydroxy groups was synthesized by polycondensing 4,4'-dihydroxydiphenylsulfone and 4,4'-dichlorodiphenylsulfone in a molar ratio of 16:15 in diphenylsulf one as the solvent at a temperature of 200 to 290 C .
Into a flask were placed 1.267 g of BSI 1, 0.310 g of Bisphenol A, 0.220 g of potassium carbonate and 6 ml of DMAc under nitrogen stream and they were heated with stirring at 80 C for 12 hours. Then, 1.00 g of the polyether sulfone oligomer having terminal hydroxy groups synthesized above was added and the reaction was continued at 80 C for 20 hours.
Gas diffusion layers in said gas diffusion electrodes may also be known materials and preferably a porous carbon nonwoven fabric or carbon paper.
Methods for producing a membrane-electrode assembly may be known processes. Examples include a method in which two plates are formed having a gas diffusion layer and a catalyst bound thereto, and a polymer electrolyte membrane is inserted and bound between them; and a method in which a catalyst is bound to a polymer electrolyte membrane and the obtained assembly is inserted and bound between gas diffusion layers.
EXAMPLES
The invention will now be described with reference to Examples, which should not be construed as a limitation upon the invention.
Methods of measurement (1) 10% weight loss temperature:
Using a thermogravimetric analyzer (TGA-50, manufactured by Shimadzu Corporation), 10% weight loss temperature was measured in the condition of a temperature raising rate of 10t/min under nitrogen atmosphere.
(2) Molecular weight (Mn):
Polystyrene-reduced number average molecular weight was measured by GPC (HLC-8020 (manuf actured by TOSOH Corporation) equipped with a UV detector (UV-8010 manufactured by TOSOH) ) with using a solvent of N,N-dimethylacetamide containing 0. 05M
LiBr.
(3) Ion exchange capacity:
After a polymer electrolyte film was immersed in O.1N
NaOH aqueous solution, neutralization titration of said aqueous solution with0.iN HC1 aqueous solution was conducted, and the value of ion exchange capacity was calculated.
(4) Proton conductivity:
With using a SI 1260 high performance IMPEDANCE/GAIN-PHASE ANALYZER (manufactured by Solartoron Company) and a 128 7 type potentiostat (ELECTROCHEMICAL INTERFACE, manufactured by Solartoron Company), proton conductivity was measured by AC impedance method in a thermo-hygrostat oven at 800C
and 90%RH.
Synthesis Example 1 (Synthesis Example of a disulfonylimide) To an aqueous solution of ammonium chloride was added dropwise an acetone solution of 1,3-benzenedisulfonyl chloride at room temperature. During addition, pH was adjusted to 7 with an aqueous sodium hydroxide solution.
Precipitated product was filtered and recrystallized from ethanol to give 1,3-benzenedisulfonamide. The structure was confirmed by 1H-NMR and IR.
Then, 4 times bymole of NaH was added to a tetrahydrofuran solution of 1,3-benzenedisulfonamide. Subsequently, 2 times by mole of pentafluorobenzenesulfonyl chloride was gradually added to the mixture and allowed to react at 60 C . The reaction mass was filtered and the filtrate was concentrated. The residue was dissolved in methanol and combined with a methanol solution of KOH to give the desired sulfonylimide (may be referred to as BSI 1) in the form of potassium salt. Theproduct was recrystallized from a mixed solvent of acetone and methanol.
F F K+ ` K+ F F
F SO2-N=S02 ~~ S02-N=SO2 ~ ~ F
F F F F
1H-NMR (ppm) : 7.52, 7.64, 7.71; 19F-NMR (ppm) : -129, -143, -154.
Example 1 (An alternating copolymer comprising BSI 1 and biphenol) Into a flask were placed 0.500 g of BSI 1, 0.121 g of 4,4'-dihydroxybiphenyl, 94~mg of potassium carbonate and 3 ml of dimethylsuifoxide (hereinafter, referred to as DMSO) under nitrogen stream and they were heated with stirring at 100 C for 18 hours. The reaction solution was added dropwise to 10% aqueous hydrochloric acid solution. The obtained precipitates were collected by filtration, washed with methanol and then dried under reduced pressure at 60 C to give 0.48 g of a disulfonylimide polymer in the form of a white solid. The result of molecular weight measurement (converted to polystyrene) is shown in Table 1.
The obtained polymer was dissolved in DMAc to a concentration of about 10$ by weight, casted in a glass dish and dried at 80 C for removing the solvent to give a colorless and transparent tough film having a thickness of 105 m. The proton conductivity of the film was measured by alternating current method under conditions including a temperature of 80 C and a humidity of 90%. Additionally, the ion exchange capacity was measured by titration method. The results are collectively shown in Table 1.
Example 2 (A random copolymer comprising BSI 1, Bisphenol A and decafluorobiphenyl) Into a flask were placed 0.773 g of BSI 1, 0.435 g of Bisphenol A, 0.334 g of decafluorobiphenyl, 0.290 g of potassium carbonate and 7.5 ml of DMSO under nitrogen stream and they were heated with stirring at 80 C for 30 hours. After completion of the reaction, the reaction solution was added dropwise to 10% methanolic hydrochloric acid solution. The obtained precipitates were collected by filtration, washed with methanol and then dried under reduced pressure at 60 C
to give 0.93 g of a disulfonylimide polymer in the form of a pale brown solid. The results of measurement for molecular weight and 10% weight loss temperature are shown in Table 1.
The obtained polymer was converted into a film in the same manner as that in Example 1 to give a transparent and pale brown tough film having a thickness of 36 m. The results of measurement for proton conductivity and the ion exchange capacity of the film are collectively shown in Table 1.
Example 3 (A block copolymer formed by reacting a disulfonylimide oligomer having terminal fluorine groups and composed of BSI
1 and Bisphenol A with a polyether sulfone having terminal hydroxy groups) A polyether sulf one oligomer (molecular weight Mn: 2.0 x 10 ) having terminal hydroxy groups was synthesized by polycondensing 4,4'-dihydroxydiphenylsulfone and 4,4'-dichlorodiphenylsulfone in a molar ratio of 16:15 in diphenylsulf one as the solvent at a temperature of 200 to 290 C .
Into a flask were placed 1.267 g of BSI 1, 0.310 g of Bisphenol A, 0.220 g of potassium carbonate and 6 ml of DMAc under nitrogen stream and they were heated with stirring at 80 C for 12 hours. Then, 1.00 g of the polyether sulfone oligomer having terminal hydroxy groups synthesized above was added and the reaction was continued at 80 C for 20 hours.
After completion of the reaction, the polymer was recovered in the same manner as that in Example 2 to give 2.01 g of a block copolymer having disulfonylimide blocks in the form of a pale yellow solid. The results of measurement for molecular weight and 10% weight loss temperature are shown in Table 1.
The obtained polymer was converted into a film in the same manner as that in Example 1 to give a semi-transparent and colorless tough film having a thickness of 147 pun. The results of measurement for proton conductivity and the ion exchange capacity of the film are collectively shown in Table 1.
Synthesis Example 2 (Synthesis Example of a disulfonylimide) To an aqueous solution of ammonium chloride was added dropwise an acetone solution of pentafluorobenzenesulfonyl chloride at room temperature. During addition, pH was adjusted to 7 by an aqueous sodium hydroxide solution.
Precipitated product was filtered and recrystallized from toluene to give pentafluorobenzenesulfonamide. The structure was confirmed by 'H-NMR, 19F-NMR and IR.
To a tetrahydrofuran solution of pentafluorobenzenesulfonamide was added 2 times by mole of NaH. Subsequently, equimolar of pentafluorobenzenesulfonyl chloride was gradually added to the mixture and allowed to react at 60 C. The reaction mass was filtered and the filtrate was concentrated. The residue was dissolved in methanol and combined with a methanol solution of KOH to give the desired sulfonylimide (may be referred to as BSI 2) in the form of potassium salt. The product was recrystallized from a mixed solvent of acetone and methanol. 19F-NMR ( ppm ): -130 ,-14 2, -154.
F K+ F
F SO2-N=SO2 F
F F F F
Example 4 (An alternating copolymer comprising BSI 2 and hydroquinone) Into a flask were placed 2.577 g of BSI 2, 0.551 g of hydroquinone, 0.795 g of potassium carbonate and 12 ml of dimethylsulf oxide under nitrogen stream and they were heated with stirring at 80 C for 19 hours. After completion of the reaction, the polymer was recovered in the same manner as that in Example 2 to give 3.00 g of a disulfonylimide polymer in the form of a brown solid. The results of measurements for molecular weight and 10% weight loss temperature are shown in Table 1.
The obtained polymer was converted into a film in the same manner as that in Example 1 to give a semi-transparent and pale brown tough film having a thickness of 54 m. The results of measurement for proton conductivity and the ion exchange capacity of the film are collectively shown in Table 1.
Example 5 (An alternating copolymer comprising BSI 2 and 4,4'-dihydroxy-3,3'-diphenylbiphenyl) Into a flask were placed 2.000 g of BSI 2, 1.313 g of 4,4'-dihydroxy-3,3'-diphenylbiphenyl, 0.563 g of potassium carbonate and 8 ml of dimethylsulf oxide under nitrogen stream and they were heated with stirring at 80 C for 20 hours. After completion of the reaction, the polymer was recovered in the same manner as that in Example 2 to give 3.00 g of a disulfonylimide polymer in the form of a white solid. The result of measurement for molecular weight and 10% weight loss temperature are shown in Table 1.
The obtained polymer was dissolved in a mixed solvent of methylene chloride and methanol in a volume ratio of 9:
1 to a concentration of about 10-t by weight, casted on a glass plate and dried at room temperature for removing the solvent to give a semi-transparent and colorless tough film having a thickness of 58 m. The results of measurement for proton conductivity and the ion exchange capacity of the film are collectively shown in Table 1.
Example 6 (A block copolymer formed by reacting a disulfonylimide oligomer having terminal fluorine groups and composed of BSI
The obtained polymer was converted into a film in the same manner as that in Example 1 to give a semi-transparent and colorless tough film having a thickness of 147 pun. The results of measurement for proton conductivity and the ion exchange capacity of the film are collectively shown in Table 1.
Synthesis Example 2 (Synthesis Example of a disulfonylimide) To an aqueous solution of ammonium chloride was added dropwise an acetone solution of pentafluorobenzenesulfonyl chloride at room temperature. During addition, pH was adjusted to 7 by an aqueous sodium hydroxide solution.
Precipitated product was filtered and recrystallized from toluene to give pentafluorobenzenesulfonamide. The structure was confirmed by 'H-NMR, 19F-NMR and IR.
To a tetrahydrofuran solution of pentafluorobenzenesulfonamide was added 2 times by mole of NaH. Subsequently, equimolar of pentafluorobenzenesulfonyl chloride was gradually added to the mixture and allowed to react at 60 C. The reaction mass was filtered and the filtrate was concentrated. The residue was dissolved in methanol and combined with a methanol solution of KOH to give the desired sulfonylimide (may be referred to as BSI 2) in the form of potassium salt. The product was recrystallized from a mixed solvent of acetone and methanol. 19F-NMR ( ppm ): -130 ,-14 2, -154.
F K+ F
F SO2-N=SO2 F
F F F F
Example 4 (An alternating copolymer comprising BSI 2 and hydroquinone) Into a flask were placed 2.577 g of BSI 2, 0.551 g of hydroquinone, 0.795 g of potassium carbonate and 12 ml of dimethylsulf oxide under nitrogen stream and they were heated with stirring at 80 C for 19 hours. After completion of the reaction, the polymer was recovered in the same manner as that in Example 2 to give 3.00 g of a disulfonylimide polymer in the form of a brown solid. The results of measurements for molecular weight and 10% weight loss temperature are shown in Table 1.
The obtained polymer was converted into a film in the same manner as that in Example 1 to give a semi-transparent and pale brown tough film having a thickness of 54 m. The results of measurement for proton conductivity and the ion exchange capacity of the film are collectively shown in Table 1.
Example 5 (An alternating copolymer comprising BSI 2 and 4,4'-dihydroxy-3,3'-diphenylbiphenyl) Into a flask were placed 2.000 g of BSI 2, 1.313 g of 4,4'-dihydroxy-3,3'-diphenylbiphenyl, 0.563 g of potassium carbonate and 8 ml of dimethylsulf oxide under nitrogen stream and they were heated with stirring at 80 C for 20 hours. After completion of the reaction, the polymer was recovered in the same manner as that in Example 2 to give 3.00 g of a disulfonylimide polymer in the form of a white solid. The result of measurement for molecular weight and 10% weight loss temperature are shown in Table 1.
The obtained polymer was dissolved in a mixed solvent of methylene chloride and methanol in a volume ratio of 9:
1 to a concentration of about 10-t by weight, casted on a glass plate and dried at room temperature for removing the solvent to give a semi-transparent and colorless tough film having a thickness of 58 m. The results of measurement for proton conductivity and the ion exchange capacity of the film are collectively shown in Table 1.
Example 6 (A block copolymer formed by reacting a disulfonylimide oligomer having terminal fluorine groups and composed of BSI
2 and hydroquinone with a polyether suifone having terminal hydroxy groups) Into a flask were placed 0.500 g of BSI 2, 0.105 g of hydroquinone, 0. 140 g of potassium carbonate and 4 ml of DMSO
under nitrogen stream and they were heated with stirring at 80 C for 15 hours. Then, 0.150 g of the polyether sulfone oligomer having terminal hydroxy groups similar to that in Example 3 was added and the reaction was continued at 80 C
for 24 hours. After completion of the reaction, the polymer was recovered in the same manner as that in Example 2 to give 0.57 g of a block copolymer having disulfonylimide blocks in the form of a brown solid. The results of measurement for molecular weight and 10% weight loss temperature are shown in Table 1.
The obtained polymer was converted into a film in the same manner as that in Example 1 to give a semi-transparent and pale brown tough film having a thickness of 26 m. The results of measurement for proton conductivity and the ion exchange capacity of the film are collectively shown in Table 1.
Example 7 (A block copolymer formed by reacting a disulfonylimide oligomer having terminal fluorine groups and composed of BSI
2 and hydroquinonesulfonic acid with a polyether sulfone having terminal hydroxy groups) Into a flask were placed 2.000 g of BSI 2, 0.780 g of potassium hydroquinonesulfonate, 0.563 g of potassium carbonate and 17 ml of DMSO under nitrogen stream and they were heated with stirring at 80 C for 6 hours. Then, 3.352 g of the polyether sulfone oligomer having terminal hydroxy groups similar to that in Example 3 was added and the reaction was continued at 80 C for 15 hours. After completion of the reaction, the polymer was recovered in the same manner as that in Example 2 to give 6.00 g of a block copolymer having disulfonylimide blocks in the form of a brown solid. The molecular weight is shown in Table 1.
The obtained polymer was converted into a film in the same manner as that in Example 5 to give a semi-transparent and pale brown tough film having a thickness of 27 pm. The results of measurement for proton conductivity and the ion exchange capacity of the film are collectively shown in Table 1.
Example 8 (A block copolymer formed by reacting a disulfonylimide oligomer having terminal fluorine groups and composed of BSI
2 and hydroquinonesulfonic acid with a polyether sulfone having terminal hydroxy groups) Into a flask were placed 5.153 g of BSI 2, 1.940 g of potassium hydroquinonesulfonate, 1.589 g of potassium carbonate and 40 ml of DMSO under nitrogen stream and they were heated with stirring at 80 C for 6 hours. Then, 10.800 g of the polyether sulfone oligomer having terminal hydroxy groups similar to that in Example 3 was added and the reaction was continued at 80 C for 10 hours. After completion of the reaction, the polymer was recovered in the same manner as that in Example 2 to give 14.40 g of a block copolymer having disulfonylimide blocks in the form of a brown solid. The results of measurement for molecular weight and 10% weight loss temperature are shown in Table 1.
The obtained polymer was converted into a film in the same manner as that in Example 5 to give a semi-transparent and pale brown tough film having a thickness of 45 m. The results of measurement for proton conductivity and the ion exchange capacity of the film are collectively shown in Table 1.
Example 9 (A polymer electrolyte membrane comprising the polymer electrolyte obtained in Example 8 composited with a polytetrafluoroethylene porous membrane) The polymer obtained in Example 8 was dissolved in a mixed solvent of methylene chloride and methanol in a volume ratio of 9 : 1 to a concentration of about 15%, applied onto polytetrafluoroethylene porous membrane (membrane thickness:
15 m, porosity: 90%, pore diameter: 3.0 m) fixed on a glass plate and dried at room temperature for removing the solvent to give a semi-transparent and pale brown tough film having a thickness of 57 m. The results of measurement for proton conductivity and the ion exchange capacity of the film are collectively shown in Table 1.
Comparative Example 1 Polycondensation was carried out with 4,4'-dihydroxydiphenylsulfone, 4,4'-dihydroxybiphenyl and 4, 4' -dichlorodiphenylsulfone in a molar ratio of 7 : 3 : 10 in the co-existence of potassium carbonate in diphenylsulfone as a solvent at a temperature of 200 to 290 C. The obtained polymer was sulfonated with concentrated sulfuric acid to give a random copolymer in which a sulfonic acid group is introduced into the biphenyl unit.
The obtained polymer was converted into a film in the same manner as that in Example 1 to give a colorless and transparent tough f ilm having a thickness of 42 m. The results of measurement for proton conductivity and the ion exchange capacity of the film are collectively shown in Table 1.
under nitrogen stream and they were heated with stirring at 80 C for 15 hours. Then, 0.150 g of the polyether sulfone oligomer having terminal hydroxy groups similar to that in Example 3 was added and the reaction was continued at 80 C
for 24 hours. After completion of the reaction, the polymer was recovered in the same manner as that in Example 2 to give 0.57 g of a block copolymer having disulfonylimide blocks in the form of a brown solid. The results of measurement for molecular weight and 10% weight loss temperature are shown in Table 1.
The obtained polymer was converted into a film in the same manner as that in Example 1 to give a semi-transparent and pale brown tough film having a thickness of 26 m. The results of measurement for proton conductivity and the ion exchange capacity of the film are collectively shown in Table 1.
Example 7 (A block copolymer formed by reacting a disulfonylimide oligomer having terminal fluorine groups and composed of BSI
2 and hydroquinonesulfonic acid with a polyether sulfone having terminal hydroxy groups) Into a flask were placed 2.000 g of BSI 2, 0.780 g of potassium hydroquinonesulfonate, 0.563 g of potassium carbonate and 17 ml of DMSO under nitrogen stream and they were heated with stirring at 80 C for 6 hours. Then, 3.352 g of the polyether sulfone oligomer having terminal hydroxy groups similar to that in Example 3 was added and the reaction was continued at 80 C for 15 hours. After completion of the reaction, the polymer was recovered in the same manner as that in Example 2 to give 6.00 g of a block copolymer having disulfonylimide blocks in the form of a brown solid. The molecular weight is shown in Table 1.
The obtained polymer was converted into a film in the same manner as that in Example 5 to give a semi-transparent and pale brown tough film having a thickness of 27 pm. The results of measurement for proton conductivity and the ion exchange capacity of the film are collectively shown in Table 1.
Example 8 (A block copolymer formed by reacting a disulfonylimide oligomer having terminal fluorine groups and composed of BSI
2 and hydroquinonesulfonic acid with a polyether sulfone having terminal hydroxy groups) Into a flask were placed 5.153 g of BSI 2, 1.940 g of potassium hydroquinonesulfonate, 1.589 g of potassium carbonate and 40 ml of DMSO under nitrogen stream and they were heated with stirring at 80 C for 6 hours. Then, 10.800 g of the polyether sulfone oligomer having terminal hydroxy groups similar to that in Example 3 was added and the reaction was continued at 80 C for 10 hours. After completion of the reaction, the polymer was recovered in the same manner as that in Example 2 to give 14.40 g of a block copolymer having disulfonylimide blocks in the form of a brown solid. The results of measurement for molecular weight and 10% weight loss temperature are shown in Table 1.
The obtained polymer was converted into a film in the same manner as that in Example 5 to give a semi-transparent and pale brown tough film having a thickness of 45 m. The results of measurement for proton conductivity and the ion exchange capacity of the film are collectively shown in Table 1.
Example 9 (A polymer electrolyte membrane comprising the polymer electrolyte obtained in Example 8 composited with a polytetrafluoroethylene porous membrane) The polymer obtained in Example 8 was dissolved in a mixed solvent of methylene chloride and methanol in a volume ratio of 9 : 1 to a concentration of about 15%, applied onto polytetrafluoroethylene porous membrane (membrane thickness:
15 m, porosity: 90%, pore diameter: 3.0 m) fixed on a glass plate and dried at room temperature for removing the solvent to give a semi-transparent and pale brown tough film having a thickness of 57 m. The results of measurement for proton conductivity and the ion exchange capacity of the film are collectively shown in Table 1.
Comparative Example 1 Polycondensation was carried out with 4,4'-dihydroxydiphenylsulfone, 4,4'-dihydroxybiphenyl and 4, 4' -dichlorodiphenylsulfone in a molar ratio of 7 : 3 : 10 in the co-existence of potassium carbonate in diphenylsulfone as a solvent at a temperature of 200 to 290 C. The obtained polymer was sulfonated with concentrated sulfuric acid to give a random copolymer in which a sulfonic acid group is introduced into the biphenyl unit.
The obtained polymer was converted into a film in the same manner as that in Example 1 to give a colorless and transparent tough f ilm having a thickness of 42 m. The results of measurement for proton conductivity and the ion exchange capacity of the film are collectively shown in Table 1.
Table 1 101 weight Molecular Ion Proton loss weight exchange conductivity temperature (Mn) capacity Example 1 356r, 1. 0 X 105 1.3 meq/g 3. 5 X 10-2 S/cm Example 2 339 6.3 X 104 1.1 4. 9 X 10-Z
Example 3 334 7.6X 104 1.2 3. 2 X 10"2 Example 4 305 5.3X 104 1.6 1. 4 X 10-1 Example 5 363 1.2X 105 1.2 4.2X 10"2 Example 6 346 1. 3 X 105 1.3 4. 8 X 10- 2 Example 7 324 7. 6 X 104 1.2 1. 2 X 10-1 Example 8 318 4.2X10' 1.1 6.5X10-2 Example 9 - - 1.0 8. 8 X 10-2 Comparative 341 8.2 X 104 1. 1 1. 3 X 10-2 example Example 10 (Evaluation of properties of a fuel cell) The polymer electrolyte obtained in Example 9 was inserted between carbon cloths having coatings of platinum on carbon to give a membrane-electrodes assembly (MEA). The MEA was inserted between separators for fuel cell to form a fuel cell.
For activation of the fuel cell, humidified hydrogen was fed to one side and humidified air was fed to the other side of the cell. The properties of the fuel cell were measured while keeping the acting temperature at 80 C. The relationship between the electric current density and the cell voltage is shown in Table 2.
Example 3 334 7.6X 104 1.2 3. 2 X 10"2 Example 4 305 5.3X 104 1.6 1. 4 X 10-1 Example 5 363 1.2X 105 1.2 4.2X 10"2 Example 6 346 1. 3 X 105 1.3 4. 8 X 10- 2 Example 7 324 7. 6 X 104 1.2 1. 2 X 10-1 Example 8 318 4.2X10' 1.1 6.5X10-2 Example 9 - - 1.0 8. 8 X 10-2 Comparative 341 8.2 X 104 1. 1 1. 3 X 10-2 example Example 10 (Evaluation of properties of a fuel cell) The polymer electrolyte obtained in Example 9 was inserted between carbon cloths having coatings of platinum on carbon to give a membrane-electrodes assembly (MEA). The MEA was inserted between separators for fuel cell to form a fuel cell.
For activation of the fuel cell, humidified hydrogen was fed to one side and humidified air was fed to the other side of the cell. The properties of the fuel cell were measured while keeping the acting temperature at 80 C. The relationship between the electric current density and the cell voltage is shown in Table 2.
Table 2 Electric current density (A/cm 2 ) Voltage (V) 0.00 0.96 0.50 0.61 1.00 0.40 The polymer electrolytes of the invention give films which are excellent in proton conductivity, thermal resistance and strength, and therefore are suitable to proton conductive membranes for fuel cells. In addition, they are soluble in solvents because they do not contain substantially a cross-linking structure, can be easily converted to films and are excellent recycling efficiency. Furthermore, when they are composited with porous membranes, they exhibit a high proton conductivity.
Claims (21)
1. A polymer electrolyte having, in a main chain, a structural unit represented by the following formula (1):
-[Ar1-(SO2-N-(X+)-SO2-Ar2)m-SO2-N-(X+)-SO2-Ar1-O1- (1) wherein Ar1 and Ar2 independently represent divalent aromatic groups, m represents an integer of 0 to 3, and X+ represents an ion selected from a hydrogen ion, an alkali metal ion and an ammonium ion.
-[Ar1-(SO2-N-(X+)-SO2-Ar2)m-SO2-N-(X+)-SO2-Ar1-O1- (1) wherein Ar1 and Ar2 independently represent divalent aromatic groups, m represents an integer of 0 to 3, and X+ represents an ion selected from a hydrogen ion, an alkali metal ion and an ammonium ion.
2. The polymer electrolyte according to claim 1, wherein the divalent aromatic groups are each at least one group selected from the following structures:
wherein R1 represents an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a halogenated alkyl group having 1 to 10 carbon atoms, an aryl group, an acetyl group, a benzoyl group, a nitrile group, a sulfonic acid group, a carboxyl acid group, a phosphonic acid group or a halogen atom; a represents an integer of 0 to 4; b and c each represent an integer of 0 to 4, with the sum of b and c being an integer of 0 to 6; when a plurality of R's exist, they may be the same or different; Y represents a direct bond, -O-, -S-, -C(O)-, -SO2- or -C(R3)2- wherein R3 represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms or a halogenated alkyl group having 1 to 10 carbon atoms or an aryl group, with the two R3s being possible to be the same or different or two R3 groups form a ring; and when a plurality of Ys exist, they may be the same or different.
wherein R1 represents an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a halogenated alkyl group having 1 to 10 carbon atoms, an aryl group, an acetyl group, a benzoyl group, a nitrile group, a sulfonic acid group, a carboxyl acid group, a phosphonic acid group or a halogen atom; a represents an integer of 0 to 4; b and c each represent an integer of 0 to 4, with the sum of b and c being an integer of 0 to 6; when a plurality of R's exist, they may be the same or different; Y represents a direct bond, -O-, -S-, -C(O)-, -SO2- or -C(R3)2- wherein R3 represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms or a halogenated alkyl group having 1 to 10 carbon atoms or an aryl group, with the two R3s being possible to be the same or different or two R3 groups form a ring; and when a plurality of Ys exist, they may be the same or different.
3. The polymer electrolyte according to claim 1 or 2, wherein Ar1 is tetrafluorophenylene.
4. The polymer electrolyte according to claim 1, 2 or 3, wherein m is 0 or 1.
5. The polymer electrolyte according to any one of claims 1 to 4, further having, in the main chain, a structural unit represented by the following formula (2):
-[Ar3-O]- (2) wherein Ar3 represents at least one divalent aromatic group selected from the following structures:
wherein R1 represents an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a halogenated alkyl group having 1 to 10 carbon atoms, an aryl group, an acetyl group, a benzoyl group, a nitrile group, a sulfonic acid group, a carboxyl acid group, a phosphonic acid group or a halogen atom; a represents an integer of 0 to 4; b and c each represent an integer of 0 to 4, with the sum of b and c being an integer of 0 to 6; when a plurality of R1s exist, they may be the same or different; Y represents a direct bond, -O-, -S-, -C(O)-, -SO2- or -C(R3)2- wherein R3 represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms or a halogenated alkyl group having 1 to 10 carbon atoms or an aryl group, with the two R3s being possible to be the same or different or two R3 groups form a ring; and when a plurality of Ys exist, they may be the same or different.
-[Ar3-O]- (2) wherein Ar3 represents at least one divalent aromatic group selected from the following structures:
wherein R1 represents an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a halogenated alkyl group having 1 to 10 carbon atoms, an aryl group, an acetyl group, a benzoyl group, a nitrile group, a sulfonic acid group, a carboxyl acid group, a phosphonic acid group or a halogen atom; a represents an integer of 0 to 4; b and c each represent an integer of 0 to 4, with the sum of b and c being an integer of 0 to 6; when a plurality of R1s exist, they may be the same or different; Y represents a direct bond, -O-, -S-, -C(O)-, -SO2- or -C(R3)2- wherein R3 represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms or a halogenated alkyl group having 1 to 10 carbon atoms or an aryl group, with the two R3s being possible to be the same or different or two R3 groups form a ring; and when a plurality of Ys exist, they may be the same or different.
6. The polymer electrolyte according to claim 5, further having, in the main chain, a structural unit represented by the following formula (2') which is different from the formula (2):
-[Ar4-O- (2') wherein Ar4 represents at least one divalent aromatic group selected from of the structures as defined for Ar3 in claim 5.
-[Ar4-O- (2') wherein Ar4 represents at least one divalent aromatic group selected from of the structures as defined for Ar3 in claim 5.
7. The polymer electrolyte according to claim 5, which is a block copolymer comprising a block having the structural unit represented by the formula (1) and the structural unit represented by the formula (2).
8. A process for producing the polymer electrolyte as defined in claim 5 which comprises polymerizing a compound represented by the formula (3) shown below with an aromatic diol represented by the formula (4) shown below:
Z-Ar'-(SO2-N-(X+)-SO2-Ar2)m-SO2-N-(X+)-SO2-Ar1-Z (3) HO-Ar3-OH (4) wherein Ar1 is as defined in claim 1 or 3; Ar2 is as defined in claim 1; Ar3 is as defined in claim 5; m is as defined in claim 1 or 4; X+ is as defined in claim 1; and Z represents halogen or nitro.
Z-Ar'-(SO2-N-(X+)-SO2-Ar2)m-SO2-N-(X+)-SO2-Ar1-Z (3) HO-Ar3-OH (4) wherein Ar1 is as defined in claim 1 or 3; Ar2 is as defined in claim 1; Ar3 is as defined in claim 5; m is as defined in claim 1 or 4; X+ is as defined in claim 1; and Z represents halogen or nitro.
9. A process for producing the polymer electrolyte as defined in claim 6 which comprises reacting a compound represented by the formula (3) shown below, an aromatic diol represented by the formula (4) shown below and a compound represented by the formula (5) shown below:
Z-Ar1-(SO2-N-(X+)-SO2-Ar2)m-SO2-N-(X+)-SO2-Ar1-Z (3) HO-Ar3-OH (4) W-Ar4-W (5) wherein Ar1 is as defined in claim 1 or 3; Ar 2 is as defined in claim 1; Ar3 is as defined in claim 5; m is as defined in claim 1 or 4; X+ is as defined in claim 1; Ar4 is as defined in claim 6; Z represents halogen or nitro; and W represents halogen or nitro.
Z-Ar1-(SO2-N-(X+)-SO2-Ar2)m-SO2-N-(X+)-SO2-Ar1-Z (3) HO-Ar3-OH (4) W-Ar4-W (5) wherein Ar1 is as defined in claim 1 or 3; Ar 2 is as defined in claim 1; Ar3 is as defined in claim 5; m is as defined in claim 1 or 4; X+ is as defined in claim 1; Ar4 is as defined in claim 6; Z represents halogen or nitro; and W represents halogen or nitro.
10. A process for producing the polymer electrolyte as defined in claim 5 which comprises polymerizing a compound represented by the formula (3) shown below with an aromatic diol represented by the formula (4) shown below, and then reacting a compound having hydroxyl represented by the formula (6) shown below:
Z-Ar1-(SO2-N-(X+)-SO2-Ar2)m-SO2-N-(X+)-SO2-Ar1-Z (3) HO-Ar3-OH (4) HO-[Ar5-O]j-H (6) wherein:
Ar1, Ar2, Ar3, and Ar5 are the same or different and each represent at least one divalent aromatic group selected from the structures:
wherein R1 represents an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a halogenated alkyl group having 1 to 10 carbon atoms, an aryl group, an acetyl group, a benzoyl group, a nitrile group, a sulfonic acid group, a carboxyl acid group, a phosphonic acid group or a halogen atom; a represents an integer of 0 to 4; b and c each represent an integer of 0 to 4, with the sum of b and c being an integer of 0 to 6; when a plurality of R1s exist, they may be the same or different; Y represents a direct bond, -O-, -S-, -C(O)-, -SO2- or -C(R3)2- wherein R3 represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms or a halogenated alkyl group having 1 to 10 carbon atoms or an aryl group, with the two R3s being possible to be the same or different or two R3 groups form a ring; and when a plurality of Ys exist, they may be the same or different;
m represents an integer of 0 to 3;
X+ represents a hydrogen ion, an alkali metal ion or an ammonium ion;
Z represent halogen or nitro; and j represents an integer of 1 to 5000.
Z-Ar1-(SO2-N-(X+)-SO2-Ar2)m-SO2-N-(X+)-SO2-Ar1-Z (3) HO-Ar3-OH (4) HO-[Ar5-O]j-H (6) wherein:
Ar1, Ar2, Ar3, and Ar5 are the same or different and each represent at least one divalent aromatic group selected from the structures:
wherein R1 represents an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a halogenated alkyl group having 1 to 10 carbon atoms, an aryl group, an acetyl group, a benzoyl group, a nitrile group, a sulfonic acid group, a carboxyl acid group, a phosphonic acid group or a halogen atom; a represents an integer of 0 to 4; b and c each represent an integer of 0 to 4, with the sum of b and c being an integer of 0 to 6; when a plurality of R1s exist, they may be the same or different; Y represents a direct bond, -O-, -S-, -C(O)-, -SO2- or -C(R3)2- wherein R3 represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms or a halogenated alkyl group having 1 to 10 carbon atoms or an aryl group, with the two R3s being possible to be the same or different or two R3 groups form a ring; and when a plurality of Ys exist, they may be the same or different;
m represents an integer of 0 to 3;
X+ represents a hydrogen ion, an alkali metal ion or an ammonium ion;
Z represent halogen or nitro; and j represents an integer of 1 to 5000.
11. A process for producing the polymer electrolyte as defined in claim 5 which comprises polymerizing a compound represented by the formula (3) shown below with an aromatic diol represented by the formula (4) shown below, and then reacting a compound represented by the formula (7) shown below:
Z-Ar1-(SO2-N-(X+)-SO2-Ar2)m-SO2-N-(X+)-SO2-Ar1-Z (3) HO-Ar3-OH (4) W-[Ar6-O]j-Ar6-W (7) wherein:
Ar1, Ar2, Ar3 and Ar6 are the same or different and each represent at least one divalent aromatic group selected from the structures:
wherein R1 represents an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a halogenated alkyl group having 1 to 10 carbon atoms, an aryl group, an acetyl group, a benzoyl group, a nitrile group, a sulfonic acid group, a carboxyl acid group, a phosphonic acid group or a halogen atom; a represents an integer of 0 to 4; b and c each represent an integer of 0 to 4, with the sum of b and c being an integer of 0 to 6; when a plurality of R1s exist, they may be the same or different; Y represents a direct bond, -O-, -S-, -C(O)-, -SO2- or -C(R3)2- wherein R3 represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms or a halogenated alkyl group having 1 to 10 carbon atoms or an aryl group, with the two R3s being possible to be the same or different or two R3 groups form a ring; and when a plurality of Ys exist, they may be the same or different;
m represents an integer of 0 to 3;
X+ represents a hydrogen ion, an alkali metal ion or an ammonium ion;
Z represents halogen or nitro;
j represents an integer of 1 to 5000; and W represents halogen or nitro.
Z-Ar1-(SO2-N-(X+)-SO2-Ar2)m-SO2-N-(X+)-SO2-Ar1-Z (3) HO-Ar3-OH (4) W-[Ar6-O]j-Ar6-W (7) wherein:
Ar1, Ar2, Ar3 and Ar6 are the same or different and each represent at least one divalent aromatic group selected from the structures:
wherein R1 represents an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a halogenated alkyl group having 1 to 10 carbon atoms, an aryl group, an acetyl group, a benzoyl group, a nitrile group, a sulfonic acid group, a carboxyl acid group, a phosphonic acid group or a halogen atom; a represents an integer of 0 to 4; b and c each represent an integer of 0 to 4, with the sum of b and c being an integer of 0 to 6; when a plurality of R1s exist, they may be the same or different; Y represents a direct bond, -O-, -S-, -C(O)-, -SO2- or -C(R3)2- wherein R3 represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms or a halogenated alkyl group having 1 to 10 carbon atoms or an aryl group, with the two R3s being possible to be the same or different or two R3 groups form a ring; and when a plurality of Ys exist, they may be the same or different;
m represents an integer of 0 to 3;
X+ represents a hydrogen ion, an alkali metal ion or an ammonium ion;
Z represents halogen or nitro;
j represents an integer of 1 to 5000; and W represents halogen or nitro.
12. A polymer electrolyte membrane comprising the polymer electrolyte as defined in any one of claims 1 to 7.
13. A composite polymer electrolyte membrane comprising the polymer electrolyte as defined in any one of claims 1 to 7 composited with a porous membrane.
14. The composite polymer electrolyte membrane according to claim 13, wherein the porous membrane comprises an aliphatic polymer or a fluorine-containing polymer.
15. The composite polymer electrolyte membrane according to claim 14, wherein the porous membrane comprises polytetrafluoroethylene.
16. A fuel cell comprising the polymer electrolyte membrane as defined in claim 12, or the composite membrane as defined in claim 13, 14 or 15.
17. A disulfonylimide compound represented by the following formula (3'):
Z-Ar1-(SO2-N-(X+)-SO2-Ar2)n-SO2-N-(X+)-SO2-Ar1-Z (31) wherein:
Ar1 and Ar2 are the same or different and are each at least one divalent aromatic group selected from the structures:
wherein R1 represents an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a halogenated alkyl group having 1 to 10 carbon atoms, an aryl group, an acetyl group, a benzoyl group, a nitrile group, a sulfonic acid group, a carboxyl acid group, a phosphonic acid group or a halogen atom; a represents an integer of 0 to 4; b and c each represent an integer of 0 to 4, with the sum of b and c being an integer of 0 to 6; when a plurality of R1s exist, they may be the same or different; Y represents a direct bond, -O-, -S-, -C(O)-, -SO2- or -C(R3)2- wherein R3 represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms or a halogenated alkyl group having 1 to 10 carbon atoms or an aryl group, with the two R3s being possible to be the same or different or two R3 groups form a ring; and when a plurality of Ys exist, they may be the same or different;
X+ represents a hydrogen ion, an alkali metal ion or an ammonium ion;
Z represents halogen or nitro; and n represents an integer of 1 to 3.
Z-Ar1-(SO2-N-(X+)-SO2-Ar2)n-SO2-N-(X+)-SO2-Ar1-Z (31) wherein:
Ar1 and Ar2 are the same or different and are each at least one divalent aromatic group selected from the structures:
wherein R1 represents an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a halogenated alkyl group having 1 to 10 carbon atoms, an aryl group, an acetyl group, a benzoyl group, a nitrile group, a sulfonic acid group, a carboxyl acid group, a phosphonic acid group or a halogen atom; a represents an integer of 0 to 4; b and c each represent an integer of 0 to 4, with the sum of b and c being an integer of 0 to 6; when a plurality of R1s exist, they may be the same or different; Y represents a direct bond, -O-, -S-, -C(O)-, -SO2- or -C(R3)2- wherein R3 represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms or a halogenated alkyl group having 1 to 10 carbon atoms or an aryl group, with the two R3s being possible to be the same or different or two R3 groups form a ring; and when a plurality of Ys exist, they may be the same or different;
X+ represents a hydrogen ion, an alkali metal ion or an ammonium ion;
Z represents halogen or nitro; and n represents an integer of 1 to 3.
18. The disulfonylimide compound according to claim 17, wherein n is 1.
19. The disulfonylimide compound according to claim 17, wherein n is 2 or 3.
20. A process for producing the disulfonylimide compound as defined in claim 18, which comprises:
(i) reacting a sulfonamide compound represented by the formula (8) shown below with a bissulfonyl chloride compound represented by the formula (9) shown below, or (ii) reacting a sulfonyl chloride compound represented by the formula (10) shown below with a bissulfonamide compound represented by the formula (11) shown below, in the presence of a base:
Z-Ar1-SO2NH2 (8) ClSO2-Ar2-SO2Cl (9) Z-Ar1-SO2Cl (10) NH2SO2-Ar2-SO2NH2 (11) wherein Ar1, Ar2 and Z are defined in claim 17.
(i) reacting a sulfonamide compound represented by the formula (8) shown below with a bissulfonyl chloride compound represented by the formula (9) shown below, or (ii) reacting a sulfonyl chloride compound represented by the formula (10) shown below with a bissulfonamide compound represented by the formula (11) shown below, in the presence of a base:
Z-Ar1-SO2NH2 (8) ClSO2-Ar2-SO2Cl (9) Z-Ar1-SO2Cl (10) NH2SO2-Ar2-SO2NH2 (11) wherein Ar1, Ar2 and Z are defined in claim 17.
21. A process for producing the disulfonylimide compound as defined in claim 19, which comprises:
reacting a bissulfonyl chloride compound represented by the formula (9) shown below and a bissulfonamide compound represented by the formula (11) shown below with at least one of:
a sulfonyl chloride compound represented by the formula (8) shown below and a sulfonamide compound represented by the formula (10) shown below in the presence of a base:
Z-Ar1-SO2NH2 (8) ClSO2-Ar2-SO2Cl (9) Z-Ar1-SO2Cl (10) NH2SO2-Ar2-SO2NH2 (11) wherein Ar1, Ar2 and Z are defined in claim 17.
reacting a bissulfonyl chloride compound represented by the formula (9) shown below and a bissulfonamide compound represented by the formula (11) shown below with at least one of:
a sulfonyl chloride compound represented by the formula (8) shown below and a sulfonamide compound represented by the formula (10) shown below in the presence of a base:
Z-Ar1-SO2NH2 (8) ClSO2-Ar2-SO2Cl (9) Z-Ar1-SO2Cl (10) NH2SO2-Ar2-SO2NH2 (11) wherein Ar1, Ar2 and Z are defined in claim 17.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001-105596 | 2001-04-04 | ||
| JP2001105596 | 2001-04-04 | ||
| JP2001297814 | 2001-09-27 | ||
| JP2001-297814 | 2001-09-27 | ||
| JP2001-376904 | 2001-12-11 | ||
| JP2001376904A JP3969077B2 (en) | 2001-04-04 | 2001-12-11 | POLYMER ELECTROLYTE AND METHOD FOR PRODUCING THE SAME |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2379277A1 CA2379277A1 (en) | 2002-10-04 |
| CA2379277C true CA2379277C (en) | 2010-02-09 |
Family
ID=27346459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2379277A Expired - Fee Related CA2379277C (en) | 2001-04-04 | 2002-03-27 | Polymer electrolyte and process for producing the same |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6939646B2 (en) |
| EP (1) | EP1248313B1 (en) |
| JP (1) | JP3969077B2 (en) |
| KR (1) | KR100810922B1 (en) |
| CA (1) | CA2379277C (en) |
| DE (1) | DE60225204T2 (en) |
Families Citing this family (45)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4052005B2 (en) * | 2001-12-20 | 2008-02-27 | 住友化学株式会社 | Production method of polymer electrolyte membrane |
| AU2003237849B2 (en) | 2002-05-13 | 2009-07-02 | Polyfuel, Inc. | Sulfonated copolymer |
| US7354679B2 (en) | 2002-05-13 | 2008-04-08 | Polyfuel, Inc. | Ion conductive random copolymers |
| CA2485971A1 (en) | 2002-05-13 | 2004-05-21 | Polyfuel, Inc. | Ion conductive block copolymers |
| JP4345269B2 (en) * | 2002-07-30 | 2009-10-14 | 住友化学株式会社 | POLYMER LAMINATED FILM, PROCESS FOR PRODUCING THE SAME AND USE THEREOF |
| KR20100022534A (en) | 2002-06-28 | 2010-03-02 | 스미또모 가가꾸 가부시끼가이샤 | Polymeric laminates, processes for producing the same, and use thereof |
| JP4241237B2 (en) * | 2002-10-15 | 2009-03-18 | 住友化学株式会社 | Block copolymer and use thereof |
| EP1465277A1 (en) * | 2003-03-19 | 2004-10-06 | HONDA MOTOR CO., Ltd. | Solid polymer electrolyte and protonconducting membrane |
| US6936377B2 (en) * | 2003-05-13 | 2005-08-30 | C. Glen Wensley | Card with embedded IC and electrochemical cell |
| US20040229127A1 (en) | 2003-05-13 | 2004-11-18 | Wensley C. Glen | Polyimide matrix electrolyte |
| US20040253520A1 (en) * | 2003-05-13 | 2004-12-16 | Wensley C. Glen | Polyimide matrix electrolyte and improved batteries therefrom |
| CA2530935A1 (en) * | 2003-06-30 | 2005-01-06 | Sumitomo Chemical Company, Limited | Polymer electrolyte composite film, method for production thereof and use thereof |
| CA2474314A1 (en) * | 2003-07-23 | 2005-01-23 | Takashi Ishizone | Copolymer and the use of the copolymer |
| US7390336B2 (en) * | 2003-07-29 | 2008-06-24 | Solicore, Inc. | Polyimide-based lithium metal battery |
| ATE550368T1 (en) * | 2003-09-30 | 2012-04-15 | Sumitomo Chemical Co | BLOCK COPOLYMER AND ITS USE |
| JP2005137972A (en) * | 2003-11-04 | 2005-06-02 | Chisso Corp | Polyolefin resin filter |
| GB0400626D0 (en) * | 2004-01-13 | 2004-02-11 | Johnson Matthey Plc | Polymer |
| JP2005209361A (en) * | 2004-01-20 | 2005-08-04 | Ube Ind Ltd | POLYMER ELECTROLYTE MEMBRANE, METHOD FOR PRODUCING THE SAME, MEMBRANE-ELECTRODE ASSEMBLY FOR FUEL CELL, AND FUEL CELL |
| JP2005209465A (en) * | 2004-01-22 | 2005-08-04 | Ube Ind Ltd | Method of manufacturing polyelectrolyte film, polyelectrolyte film, film-electrode connector for fuel cell and fuel cell |
| JP4581477B2 (en) * | 2004-05-12 | 2010-11-17 | トヨタ自動車株式会社 | Method for producing solid polymer electrolyte, solid polymer electrolyte membrane, and fuel cell |
| JP4997971B2 (en) * | 2004-07-12 | 2012-08-15 | 旭硝子株式会社 | Electrolyte membrane for polymer electrolyte fuel cell, production method thereof and membrane electrode assembly for polymer electrolyte fuel cell |
| EP1787344B1 (en) | 2004-07-22 | 2017-02-22 | BrightVolt, Inc. | Improved battery tab and packaging design |
| WO2006040985A1 (en) * | 2004-10-15 | 2006-04-20 | Matsushita Electric Industrial Co., Ltd. | Fuel cell system |
| US20070004900A1 (en) * | 2005-05-02 | 2007-01-04 | Gm Global Technology Operations, Inc. | Triblock copolymers with acidic groups |
| US7977394B2 (en) | 2005-05-03 | 2011-07-12 | GM Global Technology Operations LLC | Triblock copolymers with acidic groups |
| US7459505B2 (en) * | 2005-05-03 | 2008-12-02 | General Motors Corporation | Block copolymers with acidic groups |
| KR100868802B1 (en) | 2006-02-08 | 2008-11-17 | 고려대학교 산학협력단 | Composite Polymer Electrolyte Membrane, Manufacturing Method Thereof and Fuel Cell Employing the Electrolyte Membrane |
| US7993792B2 (en) * | 2006-07-26 | 2011-08-09 | GM Global Technology Operations LLC | Polymer blocks for PEM applications |
| US8492460B2 (en) * | 2006-07-28 | 2013-07-23 | GM Global Technology Operations LLC | Fluorinated polymer blocks for PEM applications |
| US20110207000A1 (en) * | 2006-09-07 | 2011-08-25 | Jow T Richard | Nitrile additive for non-aqueous electrolyte rechargeable electrochemical cells |
| TW200847513A (en) * | 2006-11-27 | 2008-12-01 | Sumitomo Chemical Co | Method for manufacturing polyelectrolyte membrane, and polyelectrolyte membrane |
| EP2523243A1 (en) * | 2007-03-09 | 2012-11-14 | Sumitomo Chemical Company, Limited | Membrane-electrode assembly and fuel battery using the same |
| WO2009048653A1 (en) * | 2007-05-18 | 2009-04-16 | Polyfuel, Inc. | Bis(aryl)sulfonimide functionalized ion conducting polymers |
| US20090269644A1 (en) * | 2008-04-24 | 2009-10-29 | 3M Innovative Properties Company | Proton conducting materials |
| JP5518573B2 (en) * | 2010-05-26 | 2014-06-11 | 三菱マテリアル株式会社 | Method for producing fluorinated sulfonimide compound |
| JP2014067605A (en) * | 2012-09-26 | 2014-04-17 | Nitto Denko Corp | Polymer electrolytic film and fuel battery using the same |
| KR101998724B1 (en) * | 2015-11-27 | 2019-10-01 | 주식회사 엘지화학 | Compound, polymer using the same, polymer electrolyte membrane using the same |
| KR102074551B1 (en) * | 2016-10-04 | 2020-02-06 | 주식회사 엘지화학 | Polymer and membrane comprising same |
| KR102141267B1 (en) * | 2016-11-04 | 2020-08-04 | 주식회사 엘지화학 | Compound including aromatic ring, polymer including the same |
| JP6907558B2 (en) * | 2017-01-25 | 2021-07-21 | 日本ゼオン株式会社 | Polyion Complex, Electrolyte for Electric Double Layer Capacitor and Electric Double Layer Capacitor |
| CN111834584A (en) * | 2019-04-16 | 2020-10-27 | 住友化学株式会社 | Porous layer for non-aqueous electrolyte secondary battery |
| KR102386260B1 (en) | 2020-03-25 | 2022-04-12 | 성균관대학교산학협력단 | Electrolyte membrane for lithium secondary battery, method of manufacturing membrane-electrode structure for lithium secondary battery |
| CN114400371B (en) * | 2021-12-13 | 2023-07-28 | 深圳市贝特瑞新能源技术研究院有限公司 | Polymer electrolyte and lithium ion battery |
| CN114989437B (en) * | 2022-05-09 | 2023-11-17 | 嘉庚创新实验室 | Polymer, process for producing the same, and anion exchange membrane |
| WO2025165255A1 (en) * | 2024-02-01 | 2025-08-07 | Aramco Innovations LLC | Method and system for production of produced water and desalination treatment resins |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2187046A1 (en) * | 1996-10-03 | 1998-04-03 | Alain Vallee | Sulfonylimides and sulfonylmethylides, use thereof as photoinitiators |
| JP4823401B2 (en) * | 1996-12-30 | 2011-11-24 | イドロ―ケベック | Perfluorinated amide salts and their use as ion-conducting substances |
| WO1999005126A1 (en) * | 1997-07-25 | 1999-02-04 | Acep Inc. | Perfluorovinyl ionic compounds and their use in conductive materials |
| US6090895A (en) | 1998-05-22 | 2000-07-18 | 3M Innovative Properties Co., | Crosslinked ion conductive membranes |
| JP3307891B2 (en) | 1998-12-22 | 2002-07-24 | 株式会社豊田中央研究所 | High heat-resistant polymer electrolyte and electrochemical device using the same |
-
2001
- 2001-12-11 JP JP2001376904A patent/JP3969077B2/en not_active Expired - Fee Related
-
2002
- 2002-03-27 CA CA2379277A patent/CA2379277C/en not_active Expired - Fee Related
- 2002-03-29 US US10/108,441 patent/US6939646B2/en not_active Expired - Fee Related
- 2002-04-02 DE DE60225204T patent/DE60225204T2/en not_active Expired - Lifetime
- 2002-04-02 EP EP02007287A patent/EP1248313B1/en not_active Expired - Lifetime
- 2002-04-02 KR KR1020020018062A patent/KR100810922B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP1248313A3 (en) | 2006-04-05 |
| EP1248313B1 (en) | 2008-02-27 |
| KR100810922B1 (en) | 2008-03-10 |
| DE60225204T2 (en) | 2008-06-12 |
| EP1248313A2 (en) | 2002-10-09 |
| JP2003173799A (en) | 2003-06-20 |
| DE60225204D1 (en) | 2008-04-10 |
| CA2379277A1 (en) | 2002-10-04 |
| KR20020079424A (en) | 2002-10-19 |
| US6939646B2 (en) | 2005-09-06 |
| US20020187377A1 (en) | 2002-12-12 |
| JP3969077B2 (en) | 2007-08-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2379277C (en) | Polymer electrolyte and process for producing the same | |
| CN101633734B (en) | Block copolymers and use thereof | |
| JP5905857B2 (en) | Polymer electrolyte, polymer electrolyte membrane, fuel cell catalyst layer binder, and use thereof | |
| US20100047661A1 (en) | Polymer laminate membrane, the method for producing the membrane and the use of the membrane | |
| JP2007517923A (en) | Ion conductive copolymers containing one or more hydrophobic oligomers | |
| US7910686B2 (en) | Block copolymer and application thereof | |
| KR20060023174A (en) | Polymer electrolyte composite membrane, its manufacturing method and its use | |
| WO2005063854A1 (en) | Polymer electrolyte and use thereof | |
| KR20060048879A (en) | Polymer Electrolyte Fuel Cells | |
| JP2004190003A (en) | Block copolymer and its use | |
| CN1910222B (en) | Ionically conductive polymers and membranes comprising them | |
| JP2007528930A (en) | Ion conductive copolymers containing one or more ion conductive oligomers | |
| KR20080018181A (en) | Ion conductive copolymers containing ion-conducting oligomers | |
| WO2006130859A2 (en) | Ion-conducting polymers containing pendant ion conducting groups | |
| JP4345269B2 (en) | POLYMER LAMINATED FILM, PROCESS FOR PRODUCING THE SAME AND USE THEREOF | |
| CA2607964A1 (en) | Polymer blend comprising ion-conducting copolymer and non-ionic polymer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20140327 |