WO2007132549A1 - 燃料電池用セパレータ及びその製造方法 - Google Patents
燃料電池用セパレータ及びその製造方法 Download PDFInfo
- Publication number
- WO2007132549A1 WO2007132549A1 PCT/JP2007/000407 JP2007000407W WO2007132549A1 WO 2007132549 A1 WO2007132549 A1 WO 2007132549A1 JP 2007000407 W JP2007000407 W JP 2007000407W WO 2007132549 A1 WO2007132549 A1 WO 2007132549A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sheet
- fuel cell
- separator
- cell separator
- molding
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
- C04B35/536—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite based on expanded graphite or complexed graphite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/71—Ceramic products containing macroscopic reinforcing agents
- C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
- C04B35/80—Fibres, filaments, whiskers, platelets, or the like
- C04B35/83—Carbon fibres in a carbon matrix
-
- 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
- H01M8/02—Details
-
- 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
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0213—Gas-impermeable carbon-containing materials
-
- 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
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0221—Organic resins; Organic polymers
-
- 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
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0223—Composites
- H01M8/0226—Composites in the form of mixtures
-
- 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
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0223—Composites
- H01M8/0228—Composites in the form of layered or coated products
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/422—Carbon
- C04B2235/425—Graphite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/5212—Organic
-
- 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
Definitions
- the present invention relates to a fuel cell separator produced by press-molding a preform formed in a plate shape using a mold, and a method for producing the same.
- a separator for a fuel cell means that a MEA (membrane / electrode assembly) is appropriately held in a fuel cell (a unit body in which the MEA is sandwiched between separators for a fuel cell) and is used for the electrochemical reaction. It plays the role of supplying the necessary fuel (hydrogen) and air (oxygen), and collecting the electrons obtained by the electrochemical reaction to function as a fuel cell without loss. To fulfill these roles, fuel cell separators are required to have the following characteristics: 1. mechanical strength, 2. flexibility, 3. conductivity, 4. moldability, 5. gas impermeability.
- Patent Document 1 discloses a separator for a fuel cell that is excellent in molding processability and a method for manufacturing the same by first forming a preformed body by primary molding and then performing secondary molding. Are known.
- expanded graphite is used as graphite, which is the main raw material for fuel cell separators.
- graphite which is the main raw material for fuel cell separators.
- Patent Document 2 the one disclosed in Patent Document 2 is known.
- Fuel cell separators using expanded graphite can exhibit the desired battery performance by effectively utilizing the inherent heat resistance, corrosion resistance, electrical properties (conductivity), thermal conductivity, etc. of expanded graphite. It is desirable as a means. That is, the conductivity can be excellent.
- the thickness of the separator alone is not impaired. It is necessary to make it as thin as possible.
- Thinning makes it easy to crack and allows gas to pass therethrough, so there are difficulties in the above-mentioned mechanical strength and gas impermeability.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2 0 04 _ 2 1 6 7 5 6
- Patent Document 2 Japanese Patent Laid-Open No. 2 00 0 _ 2 3 1 9 2 6
- an object of the present invention is to provide a fuel cell separator prepared by press molding of a preformed body using expanded graphite as a main material so as to be excellent in conductivity and molding processability.
- the molded body By devising the molded body to be made using a papermaking method, the mechanical strength, flexibility, and gas impermeability are improved, making it lightweight and compact suitable for use in automobiles. Means to solve the problem of making it possible
- the invention according to claim 1 is a fuel cell separator produced by press-molding a preformed body 14 formed in a plate shape using a molding die, wherein the preformed body 14 is
- the first sheet 14 A obtained by papermaking using a raw material in which a fibrous filler is added to expanded graphite is a pair of second sheet 14 B made by applying a thermosetting resin to graphite. Sandwich structure with intervening It is comprised by these.
- the invention according to claim 2 is the fuel cell separator according to claim 1, wherein the first sheet 14A has a thermosetting resin impregnated after the paper making. It is a feature.
- the invention according to claim 3 is a fuel cell separator, wherein the thermosetting resin used in the second sheet and Z according to claim 1 or the first sheet according to claim 2. Is a phenolic resin.
- the invention according to claim 4 is a method for producing a separator for a fuel cell, comprising a secondary molding step of press-molding a preform 14 formed into a plate shape using a molding die 15; A papermaking process a in which the preform 14 is made using a raw material obtained by adding a fibrous filler to expanded graphite; and the first sheet 14 A obtained by the papermaking process a is thermoset into graphite.
- a first step S 1 having a laminating step c for interposing and laminating between a pair of second sheets 14 B formed by applying a functional resin.
- the invention according to claim 5 is the method for producing a fuel cell separator according to claim 4, wherein the primary step S1 is thermosetting to the sheet-like body made by the paper making step a. It has a post-impregnation step b in which the first sheet 14 A is made by impregnating a resin.
- the invention according to claim 6 is a method of manufacturing a separator for a fuel cell, wherein the second sheet 14 B and Z according to claim 4 or the first sheet 14 according to claim 5 is provided.
- a phenol resin is used as the thermosetting resin for producing A.
- the pre-formed body is a second sheet in which the first sheet made by papermaking is mainly made of graphite and a thermosetting resin.
- a separator for a fuel cell produced by press molding a preform with expanded graphite as a main material so as to be excellent in conductivity and moldability, and using the papermaking method for the preform.
- the second sheet with excellent formability is placed on the surface with the paper sheet to be created in between, the mechanical strength, flexibility, and gas impermeability characteristics are improved. It is possible to provide a fuel cell separator that has excellent moldability, is light and suitable for automobiles, and can be compacted.
- thermosetting resin is impregnated later in the first sheet made of paper made from expanded graphite as the main raw material, so that the thermosetting resin is blended.
- the thermosetting resin enters the gaps in the sheet-like body that has been made to fill the gaps, and has a positive effect on gas permeability and bulk density.
- the thermosetting resin used for the first sheet is a phenol resin synthesized by condensation polymerization of phenols and aldehydes, insulation and water resistance are achieved.
- thermosetting resin used for the second sheet phenol resin both improved gas permeability coefficient and excellent moldability It is possible to provide a fuel cell separator having a sandwich structure that can be obtained more effectively. Further, the following means 1 to 5 may be adopted.
- the invention of claim 4 is the invention of claim 1
- the invention of claim 5 is the invention of claim 2
- the invention of claim 6 is the invention of claim 3. It is possible to provide a method for manufacturing a fuel cell separator capable of exhibiting the same effects and effects as the actions and effects of the corresponding claims.
- FIG. 1 is an exploded perspective view showing a stack structure of a solid polymer electrolyte fuel cell.
- FIG. 2 Front view showing a separator of a solid polymer electrolyte fuel cell
- FIG. 7 Chart showing various data of separators of Examples 1 to 10 and Comparative Examples 1 to 3.
- FIG. 8 Chart showing various data of separators of Examples 1 to 1 to 7.
- FIG. 1 to 3 show the stack structure
- Fig. 4 is an enlarged front view of the main part showing the cell structure
- Fig. 4 is an enlarged view of the main part showing a single cell of another structure
- Fig. 5 is a schematic diagram showing the principle of papermaking
- Fig. 6 Process diagrams showing the manufacturing principle of the separator
- Figs. 7 and 8 are diagrams showing data of various examples and comparative examples.
- the “fuel cell separator” is simply referred to as “separator”.
- the solid polymer electrolyte fuel cell E is formed of, for example, an electrolyte membrane 1 that is an ion exchange membrane formed of a fluororesin, and a carbon cloth, carbon paper, or carbon felt woven with carbon fiber yarns.
- a stack structure is provided in which current collector plates (not shown) are arranged at both ends.
- both separators 4 have fuel gas holes 6 and 7 containing hydrogen, oxidizing gas holes 8 and 9 containing oxygen, and cooling water holes 10 in the periphery.
- each of the holes 6, 7, 8, 9, 10 of each separator 4 penetrates the inside of the fuel cell E in the longitudinal direction, and the fuel gas A supply manifold, a fuel gas discharge manifold, an oxidizing gas supply manifold, an oxidizing gas discharge manifold, and a cooling water channel are formed.
- Each separator 4 has ridges (ribs) 11 formed on the front and back so that the basic cross-sectional shape is a square wave shape, and the fuel gas flow caused by the contact between the anode 2 and each ridge 11 An oxidant gas flow path 13 is formed by the path 12 and the force sword 3 coming into contact with the ridges 11.
- the back side (inner side) portions of the outward protruding strips 11 in the separators 4 and 4 are adjacent to each other, thereby forming an independent cooling water passage 10. be able to.
- a fuel gas containing hydrogen supplied to the fuel cell E from a fuel gas supply device provided outside is the fuel gas supply manifold. It is supplied to the fuel gas flow path 12 of each single cell 5 via the hold and exhibits an electrochemical reaction on the side of the single cell 5 on the anode 2 side.
- the fuel gas after the reaction is the fuel gas of each single cell 5. It is discharged from the flow path 12 through the fuel gas discharge manifold.
- the oxidizing gas (air) containing oxygen supplied to the fuel cell E from the oxidizing gas supply device provided outside is supplied to the single cell 5 through the oxidizing gas supply manifold.
- the electrochemical reaction of the fuel cell E as a whole proceeds, and the chemical energy of the fuel is directly converted into electrical energy, whereby predetermined battery performance is exhibited.
- the fuel cell E generates heat because it is operated in the temperature range of about 80 to 100 ° C. from the properties of the electrolyte membrane 1. Therefore, during operation of the fuel cell E, cooling water is supplied to the fuel cell E from a cooling water supply device provided outside, and this is circulated through the cooling water channel, thereby increasing the temperature inside the fuel cell E. Is suppressed.
- the cell structure may be that shown in FIG. That is, in the cell of FIG. 4, each separator 4 is composed of a large number of dotted ribs (ribs of a predetermined shape) arranged vertically and horizontally at equal intervals. A vertical and horizontal fuel gas flow path 1 2 is formed between the surface of 2 and a vertical and horizontal oxidizing gas flow path 1 3 is formed between the surface of the rib 1 1 and the force sword 3. It is configured.
- the second sheet 14 B which has good formability in the intermediate layer, can easily change to a non-uniform density by flowing into the thick part, so that mechanical and electrical characteristics should be improved.
- the manufacturing method of No. 4 is a method in which a preform formed in a plate shape is formed by press forming using a mold, and as shown in FIG. 6, a plate shape approximating the shape of a separator is formed. It comprises a primary molding step S 1 for producing a preform 14 and a secondary molding step S 2 for pressurizing the preform 14 with a molding die 15 to form a final shaped separator 4.
- the target characteristics of the separator 4 are: contact resistance of 30 m Q 'cm 2 or less, bending strength of 25 MPa or more, bending strain of 0.6 to 2.1%, gas permeability coefficient of 1 X 1 0 _ 8 mol ⁇ m / m 2 ⁇ s ⁇ MP a or less.
- the primary molding step S1 is performed by applying a first sheet 14A obtained by papermaking using a raw material obtained by adding a fibrous filler to expanded graphite, as a thermosetting property. This is a process to create a sandwich-shaped preform 14 formed between a pair of second sheets 14 B made by applying graphite powder to the resin.
- the paper making step a is a step of making the first sheet 14 A by paper making using a raw material obtained by adding a fibrous filler to expanded graphite. As shown in FIG. A sheet of expanded graphite (conductive material) and a fibrous filler is made using a raw material having a predetermined blending ratio, thereby forming a first sheet 14 A for the preform 14.
- the original meaning of papermaking is “making paper by rinsing paper raw materials”, but papermaking here means “making the first sheet by rinsing the above materials for the first sheet”.
- FIG. 5 shows a schematic papermaking step a for creating the first sheet 14A.
- the post-impregnation step b is a step of impregnating the first sheet 14 A made by the paper making step a with phenol resin, and thereby the first sheet in a state where it becomes a component of the preform 14.
- Sheet 1 4 A is created.
- the laminating process c consists of the first sheet 14 A prepared in the paper making process a and the post-impregnation process b, and a graphite resin (graphite powder, etc.) coated with phenol resin (an example of a thermosetting resin).
- phenol resin an example of a thermosetting resin
- a three-layered preform 14 is pressed by a press using a molding die 15 comprising an upper die 15a and a lower die 15b.
- This is a step of creating a separator 4 having a predetermined final shape.
- the papermaking step a in the primary forming step S1 is as follows. Dissolve the fiber filler that is composed of 3% carbon fiber, 7% acrylic fiber, 1% PET fiber, and 1% carbamide fiber using a home mixer, and the specified pulp concentration (eg 1%) Adjust to. For example, 83% expanded graphite of 40 m is added to the adjusted pulp slurry, and water is further added to readjust the solid content to 0.1%. Yield-improving material [Himoloc NR 11-LH (trade name)] is added to make paper as a raw material for paper making (see Example 1 in FIG. 7) (see FIG. 5). The sheet-like body made by the paper making process a is processed using a standard square sheet machine to obtain a first sheet 14 A having a 25 cm square sheet shape with a basis weight of 100 g Zm 2 .
- impregnation is performed using a phenol resin liquid to obtain a first sheet 14A for the preform 14.
- the impregnation amount of phenol resin in Example 1 is 5% after impregnation. Determined.
- the first sheet 14A made by papermaking has slightly poor formability, such as being difficult to bend, but has excellent mechanical and electrical characteristics.
- the second sheet forming step in the primary molding step S 1 is not shown in the figure, but a black lead powder (preferably having a particle size of about 1 to 200 m ) is coated with phenol resin and resin carbon. This is a step of creating a certain second sheet 1 4 B.
- the second sheet 14B which is a resin carbon, is inferior in mechanical properties but excellent in moldability.
- the second sheet 14B may be prepared as follows.
- carbon prepared by mixing and reacting phenols, aldehydes, and carbon in the presence of a catalyst.It consists of a sheet-like molded product formed from a phenol resin molding material, and phenols and aldehydes. Are mixed with carbon in the presence of a catalyst to produce a carbon-phenol resin molding material obtained by coating carbon with a thin and uniform coating with phenol resin. In this case, even when the amount of carbon is increased, it is possible to obtain a thin plate-like molded body in which the carbon particles are securely bound and the gap between the carbon particles is filled with a phenol resin. A fuel cell separator having excellent mechanical strength and electrical conductivity and low gas permeability can be easily obtained.
- the three-layered preform 14 produced in the primary molding step S1 is 1 with a surface pressure of 2 OMPa using a 70 ° C mold.
- the separator 4 is obtained by press-molding for minutes (see Fig. 6).
- the separator 4 in Example 1 has the following characteristics: Contact resistance 1 OmQ ⁇ cm 2.
- FIGS. 7 and 8 show physical properties and characteristics tables of Examples 1 to 10 and Comparative Examples 1 to 3 of the separator 4 according to the present invention (FIG. 7), and physical properties and characteristics of Examples 1 to 17 ( Fig. 8).
- the specifications of the first sheet 14A are different, and the second sheet 14B is all the same as each other.
- the contact resistance is as follows. First, two test pieces are sandwiched between two flat copper plates, and the voltage under a pressure of 1 MPa is measured as voltage A. Next, four test pieces were measured as voltage B in the same manner as described above, and the difference between voltage A and voltage B was divided by 2, and then divided by the area of the test piece, so that the contact resistance (unit: m Q ⁇ Set to cm.
- the bending strength and bending strain are measured by a three-point bending test.
- the distance between the fulcrums was 7.8 mm
- the crosshead speed was 1 O mmZm in
- the test piece width was 15 mm.
- the gas permeation coefficient was measured using a gas permeation meter (BT-1 manufactured by Toyo Seiki Seisakusho) according to the JIS, K 7 12 6 method (differential pressure method).
- Examples 1 to 6 are data when the blending ratio of the phenol resin in the post-impregnation step b is changed in 5% increments in the range of 5 to 30%.
- Example 7 shows data obtained by post-impregnation of phenolic resin and natural graphite instead of post-impregnation of phenolic resin.
- Example 8 is data in the case where graphite coated with phenol resin is post-impregnated instead of post-impregnation of phenol resin, and
- Example 9 is 13% of post-impregnation of phenol resin, and This is the data when the content of phenol resin is 7% (the content is 7% phenol resin as a raw material for paper making process a).
- Example 10 is the surface of the preform 14, that is, the second sheet 14 B,
- Example 10 Data when graphite is applied to the surface side of 1 4 B. That is, in Example 10, the coating step of applying graphite to the surface of the second sheet body 14 B made of a carbon / phenol resin molding material is added.
- the carbon fiber, acrylic fiber, PET fiber, and aramid fiber constituting the fibrous filler have the same blending ratio (blending amount).
- Examples 1 1 to 17 are data when the blending ratio of the expanded graphite of the first sheet is changed in 5% increments in the range of 60 to 90%.
- the mixing ratio of the post-impregnated phenolic resin is the same as in Example 4 for Examples 1 to 1-4.
- Comparative Examples 1 and 2 are provided in the all-paper-made separator 4 that does not have the second sheet 1 4B formed by laminating three first sheets 14A according to Examples 4 and 5.
- Comparative Example 3 shows the case where the all-carbon-carbon separator 4 without the first sheet 1 4 A formed by laminating 3 sheets of the second sheet 1 4 B is set. It is data.
- the characteristics of the all-paper-made comparative examples 1 and 2 are excellent, but the contact resistance and gas permeability coefficient deviate significantly from the specified values. There are many chips and inferior moldability.
- the all-resin carbon type of Comparative Example 3 is not acceptable because the bending strain is out of the range and the corners are missing.
- the blending ratio (material ratio) of expanded graphite should be set in the range of 60 to 80%.
- the impregnation ratio of the phenol resin is in the range of 20 to 3 Oo / o, it is possible to make the bending strength ultra high strength of 8 OMPa or more. And if the impregnation ratio of phenol resin is in the range of 20-30% and the blending ratio (material ratio) of the expanded graphite is in the range of 60-70%, the bending strength is extremely high at 105 MPa or more. There is an advantage that a strong separator for fuel cells can be realized.
- the present invention provides a separator formed by press-molding a preform formed in a plate shape using a mold, and the preform is made of expanded graphite and fibrous material. Constructed in a sandwich structure in which a second sheet made of graphite is coated with a thermosetting resin between a pair of first sheets obtained by papermaking using raw materials with fillers added
- the contact resistance is 30 mQ ⁇ cm 2 or less
- the bending strength is 25 MPa or more
- the bending strain is 0.6 to 2.1%
- the gas permeability is 1 X 1 0_ 8 mol ⁇ m / m 2 ⁇ s ⁇
- Each characteristic value target below M Pa can be cleared. .
- a fuel cell separator produced by press-molding a preformed body made of expanded graphite as the main raw material so as to be excellent in electrical conductivity and molding processability is produced by two first sheets by papermaking.
- the mechanical strength, flexibility, and gas impermeability are improved, making it lightweight suitable for automobiles, etc.
- a separator that can be made compact can be provided.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Electrochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Ceramic Engineering (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Fuel Cell (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/227,363 US20090130534A1 (en) | 2006-05-16 | 2007-04-13 | Separator for fuel cell and process for producing the same |
EP07737064A EP2034545A1 (en) | 2006-05-16 | 2007-04-13 | Separator for fuel cell and process for producing the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-136449 | 2006-05-16 | ||
JP2006136449A JP4625785B2 (ja) | 2006-05-16 | 2006-05-16 | 燃料電池用セパレータの製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007132549A1 true WO2007132549A1 (ja) | 2007-11-22 |
Family
ID=38693651
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/000407 WO2007132549A1 (ja) | 2006-05-16 | 2007-04-13 | 燃料電池用セパレータ及びその製造方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20090130534A1 (ja) |
EP (1) | EP2034545A1 (ja) |
JP (1) | JP4625785B2 (ja) |
KR (1) | KR20080103601A (ja) |
CN (1) | CN101421874A (ja) |
WO (1) | WO2007132549A1 (ja) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4792445B2 (ja) * | 2007-10-10 | 2011-10-12 | 日本ピラー工業株式会社 | 燃料電池セパレータ |
JP4792448B2 (ja) * | 2007-10-10 | 2011-10-12 | 日本ピラー工業株式会社 | 燃料電池セパレータ及びその製造方法 |
JP4792446B2 (ja) * | 2007-10-10 | 2011-10-12 | 日本ピラー工業株式会社 | 燃料電池セパレータ |
JP6972772B2 (ja) * | 2017-08-24 | 2021-11-24 | 日清紡ホールディングス株式会社 | 燃料電池セパレータ前駆体及び燃料電池セパレータ |
CN114303264A (zh) * | 2019-09-10 | 2022-04-08 | 上海旭济动力科技有限公司 | 燃料电池用的隔板、制造方法以及使用该隔板的燃料电池 |
KR20230173711A (ko) * | 2021-07-16 | 2023-12-27 | 신에츠 폴리머 가부시키가이샤 | 연료 전지용 세퍼레이터 및 그 제조 방법 |
JP7056796B1 (ja) | 2021-12-20 | 2022-04-19 | 日清紡ケミカル株式会社 | 燃料電池セパレータ用前駆体シートおよび燃料電池セパレータ |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63270138A (ja) * | 1987-04-30 | 1988-11-08 | Kobe Steel Ltd | 複合炭素部材及びその製造方法 |
JP2000231926A (ja) | 1999-02-09 | 2000-08-22 | Nippon Pillar Packing Co Ltd | 燃料電池用セパレータ及びその製造方法 |
JP2001015131A (ja) * | 1999-06-29 | 2001-01-19 | Dainippon Ink & Chem Inc | 燃料電池用セパレータ、その製造方法及び燃料電池 |
JP2002093431A (ja) * | 2000-09-11 | 2002-03-29 | Toyo Tanso Kk | 燃料電池用セパレータ |
JP2004216756A (ja) | 2003-01-16 | 2004-08-05 | Sumitomo Bakelite Co Ltd | 予備成形体成形金型及び予備成形体を用いた燃料電池セパレーターの製造方法 |
JP2006164816A (ja) * | 2004-12-09 | 2006-06-22 | Jfe Chemical Corp | 抄造シート及び燃料電池用セパレータ |
JP2006172776A (ja) * | 2004-12-14 | 2006-06-29 | Tokai Carbon Co Ltd | 燃料電池用セパレータ材とその製造方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3437937B2 (ja) * | 1998-06-25 | 2003-08-18 | 日立化成工業株式会社 | 燃料電池、燃料電池用セパレータ及びその製造方法 |
ATE528814T1 (de) * | 1999-12-06 | 2011-10-15 | Hitachi Chemical Co Ltd | Brennstoffzelle, brennstoffzellenseparator und herstellungsverfahren dafür |
JP3504910B2 (ja) * | 2000-06-19 | 2004-03-08 | 日本ピラー工業株式会社 | 燃料電池用セパレータの製造方法 |
JP2002025572A (ja) * | 2000-07-10 | 2002-01-25 | Kureha Chem Ind Co Ltd | 固体高分子型燃料電池用溝付セパレータ |
JP2003213137A (ja) * | 2002-01-28 | 2003-07-30 | Sumitomo Bakelite Co Ltd | 熱硬化性樹脂成形材料およびこれを成形してなる成形品 |
JP2005108616A (ja) * | 2003-09-30 | 2005-04-21 | Nichias Corp | 燃料電池用セパレータおよびその製造方法 |
JP2006049304A (ja) * | 2004-07-05 | 2006-02-16 | Dainippon Ink & Chem Inc | 燃料電池用セパレータ及び燃料電池 |
-
2006
- 2006-05-16 JP JP2006136449A patent/JP4625785B2/ja not_active Expired - Fee Related
-
2007
- 2007-04-13 WO PCT/JP2007/000407 patent/WO2007132549A1/ja active Application Filing
- 2007-04-13 EP EP07737064A patent/EP2034545A1/en not_active Withdrawn
- 2007-04-13 KR KR1020087025154A patent/KR20080103601A/ko not_active Application Discontinuation
- 2007-04-13 CN CNA2007800131735A patent/CN101421874A/zh active Pending
- 2007-04-13 US US12/227,363 patent/US20090130534A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63270138A (ja) * | 1987-04-30 | 1988-11-08 | Kobe Steel Ltd | 複合炭素部材及びその製造方法 |
JP2000231926A (ja) | 1999-02-09 | 2000-08-22 | Nippon Pillar Packing Co Ltd | 燃料電池用セパレータ及びその製造方法 |
JP2001015131A (ja) * | 1999-06-29 | 2001-01-19 | Dainippon Ink & Chem Inc | 燃料電池用セパレータ、その製造方法及び燃料電池 |
JP2002093431A (ja) * | 2000-09-11 | 2002-03-29 | Toyo Tanso Kk | 燃料電池用セパレータ |
JP2004216756A (ja) | 2003-01-16 | 2004-08-05 | Sumitomo Bakelite Co Ltd | 予備成形体成形金型及び予備成形体を用いた燃料電池セパレーターの製造方法 |
JP2006164816A (ja) * | 2004-12-09 | 2006-06-22 | Jfe Chemical Corp | 抄造シート及び燃料電池用セパレータ |
JP2006172776A (ja) * | 2004-12-14 | 2006-06-29 | Tokai Carbon Co Ltd | 燃料電池用セパレータ材とその製造方法 |
Also Published As
Publication number | Publication date |
---|---|
JP4625785B2 (ja) | 2011-02-02 |
JP2007311061A (ja) | 2007-11-29 |
US20090130534A1 (en) | 2009-05-21 |
CN101421874A (zh) | 2009-04-29 |
EP2034545A1 (en) | 2009-03-11 |
KR20080103601A (ko) | 2008-11-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4580889B2 (ja) | 燃料電池用セパレータ及びその製造方法 | |
US8790846B2 (en) | Gas diffusion layer and process for production thereof, and fuel cell | |
US8518603B2 (en) | Sheet molding compound flow field plate, bipolar plate and fuel cell | |
JP4625785B2 (ja) | 燃料電池用セパレータの製造方法 | |
US9257706B2 (en) | Composite separator for polymer electrolyte membrane fuel cell and method for manufacturing the same | |
EP1116293B1 (en) | Water transport plate and method of using same | |
JP5368738B2 (ja) | 燃料電池用分離板及びその製造方法 | |
WO2016051633A1 (ja) | 燃料電池用ガス拡散層、燃料電池及び燃料電池用ガス拡散層の形成方法 | |
US7049025B2 (en) | Gas diffusion substrate | |
JP4792448B2 (ja) | 燃料電池セパレータ及びその製造方法 | |
JP2007188696A (ja) | 燃料電池用セパレータ及びその製造方法 | |
US20080220154A1 (en) | Method of forming fluid flow field plates for electrochemical devices | |
JP4792445B2 (ja) | 燃料電池セパレータ | |
JP4131665B2 (ja) | 燃料電池用セパレータ | |
JP4508574B2 (ja) | 燃料電池用セパレータ、燃料電池用セパレータの製造方法 | |
JP2010123360A (ja) | 燃料電池セパレータ及びその製造方法 | |
JP2011222329A (ja) | 燃料電池セパレータ及びその製造方法 | |
JP2002164058A (ja) | 燃料電池のガス拡散層 | |
JP4792446B2 (ja) | 燃料電池セパレータ |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 07737064 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 200780013173.5 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020087025154 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 12227363 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2007737064 Country of ref document: EP |