WO2015133388A1 - フィルム付き固体電解質膜およびその製造方法 - Google Patents
フィルム付き固体電解質膜およびその製造方法 Download PDFInfo
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- WO2015133388A1 WO2015133388A1 PCT/JP2015/055787 JP2015055787W WO2015133388A1 WO 2015133388 A1 WO2015133388 A1 WO 2015133388A1 JP 2015055787 W JP2015055787 W JP 2015055787W WO 2015133388 A1 WO2015133388 A1 WO 2015133388A1
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- solid electrolyte
- electrolyte membrane
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
- G01D5/24471—Error correction
- G01D5/24485—Error correction using other sensors
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- 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
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- 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
- H01B1/08—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances oxides
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- 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
- H01B1/10—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances sulfides
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/14—Non-insulated conductors or conductive bodies characterised by their form comprising conductive layers or films on insulating-supports
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- 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
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- 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
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/06—Rotor flux based control involving the use of rotor position or rotor speed sensors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
- H02P6/18—Circuit arrangements for detecting position without separate position detecting elements
- H02P6/182—Circuit arrangements for detecting position without separate position detecting elements using back-emf in windings
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- 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
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- 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
- H01M2300/0094—Composites in the form of layered products, e.g. coatings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
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- 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
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Definitions
- the present invention relates to a solid electrolyte membrane with a film and a method for producing the same.
- Secondary batteries are widely used as power sources for portable devices because of their high energy density and high voltage. In recent years, with the reduction in size, weight, and performance of portable devices, there has been an increasing demand for higher performance and improved safety of secondary batteries. Secondary batteries are also spreading to large-size applications such as electric vehicles and household power storage systems.
- Patent Document 1 describes a method of obtaining a polymer solid electrolyte membrane by coating a polymer terephthalate (PET) film with a polymer solid electrolyte.
- Patent Document 2 describes a method in which an electrolyte solution is applied directly on an electrode, and heated and dried.
- Patent Document 3 describes a method of obtaining a film that is a solid electrolyte by heating and pressurizing after casting an electrolyte solution on a mold and drying it.
- the conventional method has a problem in that the electrolyte solution repels on the PET film, and the shape, thickness, width, and the like of the solid electrolyte membrane vary and become non-uniform. Further, there is a problem that the solid electrolyte membrane cannot be easily peeled off from a film or a mold, and the solid electrolyte membrane is damaged.
- An object of the present invention is to provide a solid electrolyte membrane with a film in which variation in the shape of the solid electrolyte membrane is suppressed and the film has good peelability and a method for producing the same.
- the solid electrolyte membrane with a film includes a film having a surface having a contact angle with respect to acetonitrile of 35 ° to 75 ° and a contact angle with chloroform of 15 ° to 40 °, and the film And a solid electrolyte membrane in contact with the surface.
- the solid electrolyte membrane with a film it is preferable that the solid electrolyte membrane includes a polymer compound having a mass average molecular weight of 10,000 or more and a metal salt.
- the metal salt is preferably a lithium salt.
- the contact angle with respect to acetonitrile is 35 degrees or more and 75 degrees or less, and the contact angle with respect to chloroform is 15 degrees or more and 40 degrees or less. It has the process of apply
- the present invention it is possible to provide a solid electrolyte membrane with a film in which variation in the shape of the solid electrolyte membrane is suppressed and the film has good peelability. Further, when the solid electrolyte membrane is a solid electrolyte membrane with a film containing a polymer compound having a mass average molecular weight of 10,000 or more and a metal salt, the mechanical strength and flexibility are also excellent. In the case of a solid electrolyte membrane with a film in which the metal salt is a lithium salt, a solid electrolyte membrane with high energy density and excellent conductivity can be provided.
- FIG. 1 is a cross-sectional view of a solid electrolyte membrane 1 with a film according to an embodiment of the present invention.
- the solid electrolyte membrane with film 1 includes a film 11 and a solid electrolyte membrane 12 formed on one surface A of the film 11.
- the film 11 has a contact angle with respect to acetonitrile of 35 ° to 75 ° and a contact angle with chloroform of 15 ° to 40 ° on the surface A in contact with the solid electrolyte membrane 12.
- the contact angle with respect to acetonitrile on the surface A is preferably 55 degrees or more and 65 degrees or less.
- the contact angle with respect to chloroform on the surface A is preferably 17 degrees or more and 37 degrees or less. If the contact angle of the surface A of the film 11 is outside the above contact angle range (exceeding the upper limit value), repelling occurs between the upper solid electrolyte membrane 12 and the shape (for example, thickness) of the solid electrolyte membrane 12 (Width and width) will vary.
- the contact angle of the surface A of the film 11 is outside the range of the contact angle (below the lower limit value), the film 11 cannot be easily peeled from the solid electrolyte membrane 12 during use, and the solid The electrolyte membrane 12 is deformed.
- the contact angle is the ⁇ / 2 method by dropping 2 ⁇ l of the solvent (acetonitrile or chloroform) on the surface A in contact with the solid electrolyte membrane of the film 11 and using an automatic contact angle meter at a temperature of 23 ⁇ 5 ° C. To obtain the static contact angle.
- a surface treatment by an oxidation method or the like or a peeling treatment can be performed.
- the oxidation method include corona discharge treatment, plasma discharge treatment, chromium oxidation treatment (wet), flame treatment, hot air treatment, ozone treatment, and ultraviolet irradiation treatment.
- These surface treatment methods are appropriately selected according to the type of the film, but in general, the corona discharge treatment method is preferably used from the viewpoint of the effect of improving the wet tension and the operability.
- the film 11 is not particularly limited as long as the contact angle of the surface A is controlled within the above range.
- an arbitrary film can be appropriately selected from conventionally known substrates and used as it is.
- Examples of the material for the substrate include synthetic resin films, paper materials, nonwoven fabrics, wood, and metal foils.
- Examples of the material of the synthetic resin film include polyester (for example, polyethylene terephthalate and polyethylene naphthalate), polyolefin (for example, polyethylene, polypropylene, and polymethylpentene), polycarbonate, polyvinyl acetate, polyvinyl chloride, acrylic, Examples include acrylonitrile, butadiene, styrene, polyimide, polyurethane, and polystyrene.
- Examples of the paper material include fine paper, impregnated paper, glassine paper, and coated paper.
- the substrate may be a single layer or a multilayer of two or more layers of the same or different types.
- the substrate is preferably a synthetic resin film
- the material of the synthetic resin film is preferably a polyester film, more preferably a polyethylene terephthalate film, and even more preferably a biaxially stretched polyethylene terephthalate film.
- the polyethylene terephthalate film is less likely to generate dust and the like during processing and use, and can effectively prevent, for example, poor coating due to dust and the like.
- the thickness of the film 11 can be appropriately designed according to the application.
- the thickness of the film 11 should just be 10 micrometers or more and 300 micrometers or less normally, Preferably they are 15 micrometers or more and 200 micrometers or less, More preferably, they are 20 micrometers or more and 125 micrometers or less.
- a film in which a release agent is applied to one surface of the substrate and a release agent layer is provided may be used as the film 11.
- the film 11 has a release agent layer
- the surface of the release agent layer has a contact angle in the above range, and the solid electrolyte membrane 12 is formed on the surface of the release agent layer.
- the release agent used for the release agent layer of the film 11 is not particularly limited.
- silicone resin release agents alkyd resin release agents, long-chain alkyl group-containing compound release agents, acrylic release agents, olefin release agents such as polyethylene, and rubber release agents such as isoprene resins Is mentioned.
- silicone resin release agents include solvent-type release agents and solvent-free release agents. Since the solvent-type silicone resin is diluted with a solvent to form a coating solution, it can be widely used from a high molecular weight high viscosity polymer to a low viscosity low molecular weight polymer (oligomer). For this reason, the solvent-type silicone resin is easier to control in accordance with the required performance (quality) than the solvent-free type silicone resin, since the releasability can be easily controlled.
- the silicone resin-based release agent include addition reaction type, condensation reaction type, ultraviolet curable type, and electron beam curable type release agents.
- the addition reaction type silicone resin has high reactivity and excellent productivity, and has advantages such as a small change in peel strength after production and no curing shrinkage compared to the condensation reaction type silicone resin. Therefore, it is preferable to use an addition reaction type silicone resin as the release agent constituting the release agent layer.
- the addition reaction type silicone resin is not particularly limited, and various silicone resins can be used.
- a silicone resin commonly used as a conventional thermosetting addition reaction type silicone resin release agent can be used.
- this addition reaction type silicone resin for example, a silicone resin having an alkenyl group such as a vinyl group and an electrophilic group such as a hydrosilyl group as a functional group in the molecule is an addition reaction type silicone that can be easily cured.
- resin Polydimethylsiloxane having such a functional group, or a silicone resin in which a part or all of methyl groups of polydimethylsiloxane are substituted with an aromatic functional group such as a phenyl group can be used as an addition reaction type silicone resin. .
- additives may be added to the silicone resin release agent as necessary.
- examples of other additives include silica, silicone resin, antistatic agent, dye, and pigment.
- the method of curing the coated silicone resin release agent coating is not particularly limited.
- the method of heat-processing in the oven of a coating machine, the method of using ultraviolet irradiation together after heat-processing, etc. are mentioned.
- the latter method is preferable in terms of prevention of wrinkles due to thermal contraction of the base material, curability of silicone, and adhesion of the release agent to the base material.
- the photopolymerization initiator is not particularly limited, and an arbitrary photopolymerization initiator can be appropriately selected from photopolymerization initiators commonly used as photopolymerization initiators that generate radicals upon irradiation with ultraviolet rays or electron beams. Can be used.
- photopolymerization initiator examples include benzoins, alkylphenones, benzophenones, acetophenones, ⁇ -hydroxyketones, ⁇ -aminoketones, ⁇ -diketones, ⁇ -diketone dialkylacetals, anthraquinones, thioxanthones Acylphosphine oxides, titanocenes, triazines, bisimidazoles, and oxime esters.
- an alkyd resin having a crosslinked structure is used as the alkyd resin release agent.
- the alkyd resin layer having a crosslinked structure can be formed by, for example, a method in which a layer made of a thermosetting resin composition containing an alkyd resin, a crosslinking agent, and a curing catalyst as required is heated and cured.
- the alkyd resin may be a modified product such as a long-chain alkyl-modified alkyd resin and a silicone-modified alkyd resin.
- Examples of the long-chain alkyl group-containing compound-based release agent include polyvinyl carbamate obtained by reacting a polyvinyl alcohol polymer with a long-chain alkyl isocyanate having 8 to 30 carbon atoms, and polyethyleneimine having 8 to 30 carbon atoms.
- An alkyl urea derivative obtained by reacting a long-chain alkyl isocyanate is used.
- the acrylic release agent for example, an acrylic resin having a crosslinked structure is used.
- the acrylic resin may be a modified product such as a long-chain alkyl-modified acrylic resin and a silicone-modified acrylic resin.
- a crystalline olefin resin is used as the olefin resin release agent.
- this crystalline olefin resin for example, polyethylene and crystalline polypropylene resin are suitable.
- polyethylene include high-density polyethylene, low-density polyethylene, and linear low-density polyethylene.
- the crystalline polypropylene resin include propylene homopolymers and propylene- ⁇ -olefin copolymers having an isotactic structure or a syndiotactic structure. These crystalline olefin resins may be used alone or in combination of two or more.
- the rubber release agent for example, natural rubber resin and synthetic rubber resin are used.
- the synthetic rubber resin include butadiene rubber, isoprene rubber, styrene-butadiene rubber, methyl methacrylate-butadiene rubber, and acrylonitrile-butadiene rubber.
- a silicone resin release agent is preferable from the viewpoint of easily controlling the contact angle with respect to acetonitrile and chloroform within the above range.
- the thickness of the release agent layer is not particularly limited, but is preferably 0.01 ⁇ m or more and 1 ⁇ m or less, and more preferably 0.03 ⁇ m or more and 0.5 ⁇ m or less.
- the shape of the film 11 is not particularly limited, for example, a rectangular shape such as a square and a rectangle, a polygonal shape such as a triangle, a pentagon, and a hexagon, a circular shape, an elliptical shape, an indefinite shape, and a long roll Various shapes may be selected depending on the use of the final product.
- stacked on the elongate film 11 is illustrated.
- the solid electrolyte membrane 12 is a polymer solid electrolyte membrane containing a polymer compound and a metal salt.
- the solid electrolyte membrane 12 includes a polymer compound and a metal salt, and is a gel containing a polymer compound, a metal salt, and a solvent even in a solid state (solvent-free solid electrolyte membrane) that does not contain a solvent. (Polymer gel electrolyte membrane).
- the content of the solvent in the polymer gel electrolyte membrane is usually 30% by mass or more and 99% by mass or less of the entire solid electrolyte membrane 12.
- the content of the polymer compound in the solid electrolyte membrane 12 is preferably 5% by mass or more and 99% by mass or less of the entire solid electrolyte membrane 12. It is more preferable that the content be not less than 95% by mass.
- the content of the polymer compound in the solid electrolyte membrane 12 is preferably 0.5% by mass or more and 65% by mass or less of the entire solid electrolyte membrane 12.
- the polymer compound contained in the solid electrolyte membrane 12 preferably has a mass average molecular weight of 10,000 or more, more preferably a mass average molecular weight of 10,000 or more and 1,000,000 or less, and a mass average molecular weight of 20,000 or more. More preferably, it is 500,000 or less.
- Specific examples of polymer compounds having a mass average molecular weight of 10,000 or more include polyethylene oxide, polyethylene carbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, polyhexafluoropropylene, and polyethylene oxide. Illustrated. When the mass average molecular weight of the polymer compound is 10,000 or more, the shape stability of the solid electrolyte membrane 12 is excellent. Therefore, the solid electrolyte membrane with film 1 has good mechanical strength and excellent flexibility.
- a well-known metal salt can be utilized according to the kind of nonaqueous electrolyte secondary battery, the kind of active material, etc.
- alkali metal salts such as lithium salt and sodium salt
- alkaline earth metal salts such as magnesium salt and calcium salt
- lithium salt is more preferable because of its high energy density.
- the metal salt can exist as a cation such as an alkali metal and a counter ion of the cation. If the metal salt is a lithium salt, lithium ions are transported through the polymer compound.
- lithium salt LiClO 4, LiBF 4, LiI , LiPF 6, LiCF 3 SO 3, LiCF 3 COO, LiNO 3, LiAsF 6, LiSbF 6, LiAlCl 4, LiCl, LiBr, LiB (C 2 H 5) 4 , LiCH 3 SO 3 , LiC 4 F 9 SO 3 , Li (CF 3 SO 2 ) 2 N, Li (C 2 F 5 SO 2 ) N, and Li [(CO 2 ) 2 ] 2 B Can do.
- the concentration of the metal salt in the solid electrolyte membrane 12 is not particularly limited.
- the ratio of the mass Ms of the metal salt to the mass Mp of the polymer compound in the solid electrolyte membrane 12 is preferably 0.01 or more and 10 or less, and 0.05 or more and 7 or less. Is more preferable.
- the thickness of the solid electrolyte membrane 12 is preferably 1 ⁇ m or more and 300 ⁇ m or less, more preferably 10 ⁇ m or more and 100 ⁇ m or less, and further preferably 20 ⁇ m or more and 70 ⁇ m or less. If the thickness of the solid electrolyte membrane 12 is within the above range, a short circuit is not caused and the resistance can be kept low.
- the solid electrolyte membrane 1 with a film may have a protective sheet 15 that covers the solid electrolyte membrane 12 (see FIG. 3).
- the material of the protective sheet 15 is not particularly limited, but is preferably a material that can be easily peeled off from the solid electrolyte membrane 12.
- the protective sheet 15 may have a release agent layer on the surface.
- a release agent layer may be formed on the surface of the protective sheet 15 and the solid electrolyte membrane 12 may be covered so that the release agent layer is in contact therewith.
- the same base material as the film 11 can also be used.
- the release agent which comprises a release agent layer may be the same as the release agent which comprises the above-mentioned release agent layer.
- the manufacturing apparatus 100 includes a first supply unit 20 for feeding out the film 11, a coating unit 30 for applying the composition for forming a solid electrolyte membrane, a drying unit 40 for curing the applied composition for forming a solid electrolyte membrane, The second supply means 60 for feeding out the protective sheet 15, the bonding part 70 for bonding the protective sheet 15 to the solid electrolyte membrane 1 with film, and the winding for winding the solid electrolyte membrane 1 with film to which the protective sheet 15 has been bonded. And taking means 80.
- the first supply means 20 includes a rotation motor 21 as a driving device and a support roller 22 provided so as to be rotatable by the rotation motor 21.
- the support roller 22 supports the long film 11 wound in a roll shape. The film 11 fed out from the support roller 22 is supplied to the coating means 30 while being guided in the conveyance direction by a guide roller.
- the coating means 30 forms a solid electrolyte membrane on the surface A of the film 11 having a contact angle with respect to acetonitrile of 35 ° to 75 ° and a contact angle with chloroform of 15 ° to 40 °.
- the coating composition is applied to form a coating film.
- the coating means 30 include a gravure coater, a knife coater, a roll coater, a die coater, a dip coater, a bar coater, a comma coater, and a lip coater.
- the composition for forming a solid electrolyte membrane includes a polymer compound, a metal salt, and a solvent.
- the composition for forming a solid electrolyte membrane may further contain other components as desired.
- This composition preferably contains the above-described polymer compound having a mass average molecular weight of 10,000 or more as the polymer compound. Moreover, it is preferable that this composition contains lithium salt as a metal salt.
- the content of the polymer compound is preferably 5% by mass or more and 98% by mass or less, and more preferably 10% by mass or more and 94% by mass or less of the entire composition.
- the content of the metal salt is preferably 1% by mass or more and 94% by mass or less, and more preferably 5% by mass or more and 89% by mass or less of the entire composition.
- the content of the solvent is usually 99% by mass or less, preferably 94% by mass or less, more preferably 85% by mass or less of the entire composition.
- the solvent may be any solvent that can dissolve the polymer compound and uniformly disperse the metal salt.
- the solvent used for the slurry for nonaqueous electrolyte secondary battery electrodes can be used.
- a solvent capable of exhibiting excellent ion conductivity because of low viscosity and high ion mobility, high dielectric constant and high effective carrier concentration, or both is preferable.
- Examples of the solvent contained in the composition for forming a solid electrolyte membrane of the present embodiment include, for example, alkyl carbonates such as ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate, butylene carbonate, and methyl ethyl carbonate, ⁇ -butyrolactone, and methyl formate.
- Esters, ethers such as 1,2-dimethoxyethane, tetrahydrofuran, sulfolane, dimethyl sulfoxide, acetonitrile, chloroform and the like. These solvents may be used as a mixture of two or more.
- the method for preparing the composition for forming a solid electrolyte membrane is not particularly limited.
- the monomer may be polymerized to obtain the polymer compound and then the metal salt may be contained, or the monomer is polymerized in the presence of the metal salt. To form a polymer compound.
- the drying unit 40 cures the coating film formed by the coating unit 30.
- the solid electrolyte membrane 1 with a film is obtained by removing the solvent contained in the coating film by the drying means 40 and curing the coating film.
- the drying means 40 may have a plurality of drying zones that can be set to different temperatures. Examples of the drying means 40 include a hot air circulation drying device and a far infrared drying device. What is necessary is just to set drying conditions (drying time, drying temperature, etc.) suitably.
- the second supply means 60 includes a rotation motor 61 as a drive device, and a support roller 62 that is rotatably provided by the rotation motor 61.
- the support roller 62 supports the long protective sheet 15 wound in a roll shape. The protective sheet 15 fed out from the support roller 62 is supplied to the bonding unit 70.
- the bonding unit 70 includes a first bonding roller 71 on which the solid electrolyte membrane 1 with a film is laid and a second bonding roller 72 on which the protective sheet 15 is laid.
- the film-attached solid electrolyte membrane 1 and the protective sheet 15 are bonded by passing between the first bonding roller 71 and the second bonding roller 72, and the protective sheet 15 is bonded thereto. 1
- the solid electrolyte membrane with film 1 to which the protective sheet 15 is bonded is guided to the downstream side where the winding means 80 is disposed by the first bonding roller 71 and the second bonding roller 72.
- the winding means 80 includes a rotation motor 81 as a drive device, and a support roller 82 that is rotatably provided by the rotation motor 81.
- the support roller 82 supports the solid electrolyte membrane 1 with a film on which the protective sheet 15 is bonded by winding it in a roll shape.
- the solid electrolyte membrane 1 with a film wound in a roll shape is cut into a predetermined shape and a predetermined dimension, and can be used as, for example, the solid electrolyte membrane 1 with a film to which a protective sheet 15 is bonded.
- the contact angle of the surface A of the film 11 with which the solid electrolyte membrane 12 is in contact is within the predetermined range described above, so that repelling occurs between the film 11 and the solid electrolyte membrane 12. It is suppressed.
- the variation in the shape of the solid electrolyte membrane 12 can be suppressed, and the film 11 can be easily peeled off.
- the versatility of the solid electrolyte membrane 12 is high. For example, it is possible to use the solid electrolyte membrane 12 with the film 11 peeled off, and the electrode 11 can be used in various ways.
- the problem of repelling is remarkable when the concentration of the metal salt in the electrolyte solution is high and the concentration of the compound serving as the binder is low.
- the solid electrolyte membrane with film 1 according to the embodiment even if the concentration of the metal salt in the solid electrolyte membrane 12 is high and the concentration of the polymer compound serving as the binder is low, repelling is suppressed, Variations in the shape of the solid electrolyte membrane 12 can be suppressed.
- the solid electrolyte membrane 12 may have tackiness.
- the film 11 is attached to the solid electrolyte membrane 12, it is excellent in handling property compared with the aspect which handles the solid electrolyte membrane 12 independently.
- the solid electrolyte membrane 12 has tackiness, it is preferable that the solid electrolyte membrane 12 is covered with the protective sheet 15. Since the solid electrolyte membrane 12 is not exposed, handling properties are further improved.
- the film 11 and the protective sheet 15 may be peeled sequentially.
- a coating film is formed by applying the composition for forming a solid electrolyte membrane on the surface A having a contact angle within the predetermined range. Therefore, the repellency of the composition on the surface A is suppressed, and the repellency of the solid electrolyte membrane 12 obtained by drying the coating film is also suppressed. And according to the manufactured solid electrolyte membrane 1 with a film, the film 11 can be easily peeled from the solid electrolyte membrane 12.
- the method for manufacturing a solid electrolyte membrane with a film according to the embodiment since the contact angle of the surface A of the film 11 is within the predetermined range described above, the solid electrolyte is continuously supplied while the long film 11 is continuously supplied. Even if the film-forming composition is applied and the coating film is dried and cured, repellency is suppressed. Therefore, according to the method for manufacturing a solid electrolyte membrane with a film according to the above-described embodiment, production by so-called Roll to Roll is possible, so that the production efficiency can be significantly improved. Conventionally, since the film was formed on a mold, there was a problem that the production efficiency of the solid electrolyte membrane was low.
- the aspect of manufacturing by Roll to Roll has been described as an example, but the present invention is not limited to such an aspect.
- the solid electrolyte membrane with a film may be produced by applying the composition for forming a solid electrolyte membrane to the film using a coating means such as a doctor blade and then drying in an oven.
- a solid electrolyte membrane may be further formed on the second surface opposite to the surface A.
- the second surface also preferably has a contact angle with respect to acetonitrile of 35 ° to 75 ° and a contact angle with chloroform of 15 ° to 40 °.
- the entire one surface A of the film may not have a contact angle in the above range.
- region where a solid electrolyte membrane is formed in the one side A of a film should just be a contact angle of the said range.
- composition applied by the coating means 30 is not limited to the configuration described in the above embodiment.
- the composition applied by the coating means 30 may be a composition containing a polymer compound and a metal salt and no solvent (solvent-free composition).
- the composition applied by the coating means 30 may be configured to include a monomer, a polymerization initiator, a metal salt, and a solvent. If it is a composition by such a structure, a monomer can be polymerized by UV irradiation. Thus, when it is the aspect which superposes
- the UV irradiation conditions (wavelength, intensity, irradiation time, etc.) may be set as appropriate.
- the coating film may be cured by appropriately combining the drying means 40 and the UV irradiation means according to the composition of the composition to be applied.
- the solid electrolyte membrane 12 When the solid electrolyte membrane 12 is formed using a composition containing a monomer, a polymerization initiator, a metal salt, and a solvent, the solid electrolyte membrane 12 has a mass average molecular weight of 10,000 to 1,000,000 in the polymer after monomer polymerization. It is preferable to be formed. If the mass average molecular weight after polymerization is 10,000 or more and 1,000,000 or less, the solid electrolyte membrane with film 1 is excellent in workability and moldability.
- Examples of such monomers include 2- (2-ethoxyethoxy) ethyl acrylate, 2-cyanoethyl acrylate, methoxypolyethylene glycol methacrylate, methoxypolypropylene glycol methacrylate, ethoxypolyethylene glycol methacrylate, ethoxypolypropylene glycol methacrylate, and methoxypolyethylene glycol acrylate. , Methoxypolypropylene glycol acrylate, ethoxypolyethylene glycol acrylate, ethoxypolypropylene glycol acrylate, and mixtures thereof.
- a crosslinking aid for the ultraviolet crosslinking reaction for example, ethylene glycol diacrylate, ethylene glycol dimethacrylate, oligoethylene glycol diacrylate, oligoethylene glycol dimethacrylate, propylene glycol diacrylate, propylene glycol dimethacrylate, oligopropylene glycol Diacrylate, oligopropylene glycol dimethacrylate, 1,3-butylene glycol diacrylate, 1,4-butylene glycol diacrylate, 1,3-glycerol dimethacrylate, 1,1,1-trimethylolpropane dimethacrylate, 1,1 , 1-Trimethylolethane diacrylate, pentaerythritol trimethacrylate, 1,2,6-hexanetriacrylate Sorbitol pentamethacrylate, methylene bisacrylamide, methylene bismethacrylamide divinylbenzene, vinyl methacrylate, vinyl crotonate, vinyl acrylate
- the polymerization initiator, metal salt, and solvent are exemplified by the same photopolymerization initiator, metal salt, and solvent as those described above.
- the composition to be applied may be a composition containing a monomer, a polymerization initiator, and a metal salt and not containing a solvent.
- Example 1 100 parts by mass of polyethylene oxide (PEO) having a mass average molecular weight of 110,000 [Meisei Chemical Industry Co., Ltd. “Alcox L-11 (trade name)”], 10 parts by mass of lithium bistrifluoromethanesulfonylimide (LiTFSI), The composition for solid electrolyte membrane formation was prepared by mix
- the film is coated on the layer side with a die coater, and dried for 10 minutes in a dryer with a temperature gradient set so that the first drying zone on the upstream side is 80 ° C. and the second drying zone on the downstream side is 120 ° C.
- a solid electrolyte membrane was obtained.
- Alcox is a registered trademark.
- Example 2 100 parts by weight of polyethylene carbonate (PEC) having a weight average molecular weight of 120,000 [“QPAC-25 (trade name)” manufactured by EMPOWER MATERIALS]], 400 parts by weight of LiTFSI, and 500 parts by weight of chloroform are mixed and stirred well. Thereby, the composition for solid electrolyte membrane formation was prepared. Thereafter, a solid electrolyte membrane with a film was obtained in the same procedure as in Example 1. Each evaluation was performed in the same manner as in Example 1.
- QPAC is a registered trademark.
- Example 3 The film used was changed to “NF SP-PET3801 (trade name)” [film having a silicone resin release agent layer on one side of a 38 ⁇ m thick base material (polyethylene terephthalate film)] manufactured by Lintec Corporation. A solid electrolyte membrane with a film was obtained in the same manner as in Example 1 except that. Each evaluation was performed in the same manner as in Example 1.
- Example 4 A solid electrolyte membrane with a film was obtained in the same manner as in Example 2 except that the used film was changed to “NF SP-PET3801 (trade name)” manufactured by Lintec Corporation. Each evaluation was performed in the same manner as in Example 1.
- Example 5 The film used was changed to “NF SP-PET 381031C (trade name)” [film having a silicone resin release agent layer on one surface of a 38 ⁇ m thick base material (polyethylene terephthalate film)] manufactured by Lintec Corporation. A solid electrolyte membrane with a film was obtained in the same manner as in Example 1 except that. Each evaluation was performed in the same manner as in Example 1.
- Example 6 A solid electrolyte membrane with a film was obtained in the same manner as in Example 2 except that the used film was changed to “NF SP-PET 381031C (trade name)” manufactured by Lintec Corporation. Each evaluation was performed in the same manner as in Example 1.
- Example 7 The used film is changed to a 100 ⁇ m-thick Naflon sheet (manufactured by ASONE), and the surface of the film is treated with a corona treatment machine (“CORONA STATION” manufactured by Kasuga Electric Co., Ltd.) with a discharge amount of 20 W ⁇ min / m 2 .
- a solid electrolyte membrane with a film was obtained in the same manner as in Example 1 except that it was applied. Each evaluation was performed in the same manner as in Example 1.
- Example 8 The used film is changed to a 100 ⁇ m thick Naflon sheet (manufactured by ASONE), and the surface of the film is treated with a corona treatment machine (“CORONA STATION” manufactured by Kasuga Electric Co., Ltd.) with a discharge amount of 20 W ⁇ min / m 2
- a corona treatment machine (“CORONA STATION” manufactured by Kasuga Electric Co., Ltd.) with a discharge amount of 20 W ⁇ min / m 2
- CORONA STATION manufactured by Kasuga Electric Co., Ltd.
- Example 1 A solid electrolyte membrane with a film was obtained in the same manner as in Example 1 except that the used film was changed to “PET38 T-100 (trade name)” manufactured by Mitsubishi Plastics. Each evaluation was performed in the same manner as in Example 1.
- Example 2 A solid electrolyte membrane with a film was obtained in the same manner as in Example 2 except that the used film was changed to “PET38 T-100 (trade name)” manufactured by Mitsubishi Plastics. Each evaluation was performed in the same manner as in Example 1.
- Example 3 A solid electrolyte membrane with a film was obtained in the same manner as in Example 1 except that the used film was changed to a 100 ⁇ m-thick Naflon sheet (manufactured by ASONE). Each evaluation was performed in the same manner as in Example 1. Naflon is a registered trademark.
- Example 4 A solid electrolyte membrane with a film was obtained in the same manner as in Example 2 except that the used film was changed to a 100 ⁇ m-thick Naflon sheet (manufactured by ASONE). Each evaluation was performed in the same manner as in Example 1.
- Example 5 A solid electrolyte membrane with a film was obtained in the same manner as in Example 1 except that the used film was changed to “PET38 AL-5 (trade name)” manufactured by Lintec Corporation. Each evaluation was performed in the same manner as in Example 1.
- Example 6 A solid electrolyte membrane with a film was obtained in the same manner as in Example 2 except that the used film was changed to “PET38 AL-5 (trade name)” manufactured by Lintec Corporation. Each evaluation was performed in the same manner as in Example 1.
- Example 7 The film used was changed to “NF SP-PET3801 (trade name)” manufactured by Lintec Corporation, and the surface of the silicone resin release agent layer of the film was subjected to a corona treatment machine (“CORONA STATION” manufactured by Kasuga Electric Co., Ltd.). A solid electrolyte membrane with a film was obtained in the same manner as in Example 1 except that a treatment with a discharge amount of 20 W ⁇ min / m 2 was performed. Each evaluation was performed in the same manner as in Example 1.
- Example 8 The film used was changed to “NF SP-PET3801 (trade name)” manufactured by Lintec Corporation, and the surface of the silicone resin release agent layer of the film was subjected to a corona treatment machine (“CORONA STATION” manufactured by Kasuga Electric Co., Ltd.). A solid electrolyte membrane with a film was obtained in the same manner as in Example 2 except that a treatment with a discharge amount of 20 W ⁇ min / m 2 was performed. Each evaluation was performed in the same manner as in Example 1.
- the solid electrolyte membrane with a film according to the present invention can be used as a solid electrolyte membrane by peeling the film.
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Abstract
Description
また、固体電解質膜が、質量平均分子量1万以上の高分子化合物と、金属塩とを含むフィルム付き固体電解質膜の場合、機械的強度および柔軟性にも優れる。
また、金属塩がリチウム塩であるフィルム付き固体電解質膜の場合、エネルギー密度が高く、導電性に優れる固体電解質膜を提供することができる。
[フィルム付き固体電解質膜]
図1は、本発明の一実施形態に係るフィルム付き固体電解質膜1の断面図である。
フィルム付き固体電解質膜1は、フィルム11と、フィルム11の一方の面Aに形成された固体電解質膜12とを有する。
フィルム11の面Aの接触角が前記接触角の範囲外である(上限値を超える)と、上層の固体電解質膜12との間にハジキが生じて、固体電解質膜12の形状(例えば、厚さおよび幅等)がばらついてしまう。
また、フィルム11の面Aの接触角が前記接触角の範囲外である(下限値を下回る)と、使用の際に、固体電解質膜12からフィルム11を容易に剥離することができず、固体電解質膜12が変形してしまう。
なお、接触角は、フィルム11の固体電解質膜と接する面Aについて、前記溶媒(アセトニトリルまたはクロロホルム)2μリットルを滴下し、23±5℃の温度で自動接触角計を用いて、θ/2法により静的接触角を算出することにより得られる。
基材は、単層であってもよいし、同種又は異種の2層以上の多層であってもよい。基材としては、合成樹脂フィルムであることが好ましく、合成樹脂フィルムの材質としては、ポリエステルフィルムが好ましく、ポリエチレンテレフタレートフィルムがより好ましく、二軸延伸ポリエチレンテレフタレートフィルムがさらに好ましい。ポリエチレンテレフタレートフィルムは、加工時および使用時等において、埃等が発生しにくいため、例えば、埃等による塗工不良等を効果的に防止することができる。
固体電解質膜12が高分子ゲル電解質膜である場合、固体電解質膜12中の高分子化合物の含有量は、固体電解質膜12全体の0.5質量%以上65質量%以下であることが好ましい。
質量平均分子量1万以上の高分子化合物として、具体的には、ポリエチレンオキシド、ポリエチレンカーボネート、ポリアクリロニトリル、ポリフッ化ビニリデン、ポリメタクリル酸メチル、ポリヘキサフルオロプロピレン、およびポリエチレンオキサイド等のイオン伝導性ポリマーが例示される。
高分子化合物の質量平均分子量が1万以上であれば、固体電解質膜12の形状安定性に優れる。そのため、フィルム付き固体電解質膜1は、機械的強度が良好で、柔軟性にも優れる。
固体電解質中で金属塩は、アルカリ金属等の陽イオンおよび当該陽イオンの対イオンとして存在し得る。金属塩がリチウム塩であれば、リチウムイオンが高分子化合物を介して輸送される。
固体電解質膜12の厚さが上記範囲内であれば、短絡することもなく、また、抵抗を低く抑えることができる。
次に、本実施形態に係るフィルム付き固体電解質膜の製造方法について説明する。
図2には、本実施形態に係るフィルム付き固体電解質膜の製造方法を説明する概略図が示されている。
本実施形態では、製造装置100を用いて、フィルム付き固体電解質膜1を製造する。
製造装置100は、フィルム11を繰り出す第一供給手段20と、固体電解質膜形成用組成物を塗布する塗工手段30と、塗布された固体電解質膜形成用組成物を硬化させる乾燥手段40と、保護シート15を繰り出す第二供給手段60と、フィルム付き固体電解質膜1に保護シート15を貼合する貼合部70と、保護シート15が貼合されたフィルム付き固体電解質膜1を巻き取る巻取手段80とを備える。
塗工手段30は、本実施形態では、アセトニトリルに対する接触角が35度以上75度以下であり、かつクロロホルムに対する接触角が15度以上40度以下であるフィルム11の面Aに、固体電解質膜形成用組成物を塗布して塗膜を形成する。
塗工手段30としては、例えば、グラビアコーター、ナイフコーター、ロールコーター、ダイコーター、ディップコーター、バーコーター、コンマコーター、およびリップコーター等を挙げることができる。
この組成物は、高分子化合物として、前述の質量平均分子量1万以上の高分子化合物を含んでいることが好ましい。また、この組成物は、金属塩として、リチウム塩を含んでいることが好ましい。
金属塩の含有量は、組成物全体の1質量%以上94質量%以下であることが好ましく、5質量%以上89質量%以下であることがより好ましい。
溶媒の含有量は、通常、組成物全体の99質量%以下、好ましくは94質量%以下、より好ましくは85質量%以下である。
乾燥手段40は、塗工手段30にて形成された塗膜を硬化させる。乾燥手段40により塗膜に含まれる溶媒を除去し、塗膜を硬化させることで、フィルム付き固体電解質膜1が得られる。
乾燥手段40は、互いに異なる温度に設定できる複数の乾燥ゾーンを有していてもよい。
乾燥手段40としては、例えば、熱風循環式乾燥装置、および遠赤外線式乾燥装置等を挙げることができる。
乾燥条件(乾燥時間および乾燥温度等)は、適宜設定すればよい。
第二供給手段60は、駆動機器としての回動モータ61と、回動モータ61により回転可能に設けられた支持ローラ62とを備える。支持ローラ62は、ロール状に巻回した長尺状の保護シート15を支持する。支持ローラ62から繰り出された保護シート15は、貼合部70へ供給される。
巻取手段80は、駆動機器としての回動モータ81と、回動モータ81により回転可能に設けられた支持ローラ82とを備える。支持ローラ82は、保護シート15が貼合されたフィルム付き固体電解質膜1をロール状に巻回して支持する。
例えば、面Aとは反対側の第二の面にさらに固体電解質膜が形成されていてもよい。この場合、当該第二の面も、アセトニトリルに対する接触角が35度以上75度以下であり、かつクロロホルムに対する接触角が15度以上40度以下であることが好ましい。
重合後の質量平均分子量が1万以上100万以下であれば、フィルム付き固体電解質膜1は、加工性および成形性に優れる。
このようなモノマーとしては、例えば、アクリル酸2-(2-エトキシエトキシ)エチル、2-シアノエチルアクリレート、メトキシポリエチレングリコールメタクリレート、メトキシポリプロピレングリコールメタクリレート、エトキシポリエチレングリコールメタクリレート、エトキシポリプロピレングリコールメタクリレート、メトキシポリエチレングリコールアクリレート、メトキシポリプロピレングリコールアクリレート、エトキシポリエチレングリコールアクリレート、エトキシポリプロピレングリコールアクリレート、およびこれらの混合物等が挙げられる。
質量平均分子量110,000であるポリエチレンオキシド(PEO)[明成化学工業株式会社「アルコックスL-11(商品名)」]100質量部と、リチウムビストリフルオロメタンスルホニルイミド(LiTFSI)10質量部と、アセトニトリル500質量部とを配合し、よく撹拌することで、固体電解質膜形成用組成物を調製した。得られた組成物を、リンテック株式会社製「PLS31T161(商品名)」[厚さ31μmの基材(ポリエチレンテレフタレートフィルム)の一方の面上に、シリコーン樹脂系剥離剤層を有するフィルム]の剥離剤層側に、ダイコーターにより塗布し、上流側の第1乾燥ゾーンは80℃、下流側の第2乾燥ゾーンは120℃となるように温度勾配を設定したドライヤー中で10分間乾燥させて、フィルム付き固体電解質膜を得た。アルコックスは、登録商標である。
得られたフィルム付き固体電解質膜につき、ハジキの有無を目視にて観察した。結果を表1に示す。なお、評価は次に示す基準に基づいて行った。
A:塗布幅に対して得られた固体電解質膜の幅の変動率が10%以内。
B:塗布幅に対して得られた固体電解質膜の幅の変動率が10%超過
またはハジキによる無塗布部分が発生。
得られたフィルム付き固体電解質膜を、露点-60℃以下に制御されたアルゴン雰囲気下に移動させた後に、フィルムから固体電解質膜を引き剥がし、剥離性の評価を行った。結果を表1に示す。なお、評価は次に示す基準に基づいて行った。
C:容易にフィルムより剥離できた。
D:容易に剥離できず、固体電解質膜が変形した。
質量平均分子量120,000であるポリエチレンカーボネート(PEC)[EMPOWER MATERIALS社製「QPAC-25(商品名)」]100質量部と、LiTFSI400質量部と、クロロホルム500質量部とを配合し、よく撹拌することで、固体電解質膜形成用組成物を調製した。その後、実施例1と同様の手順で、フィルム付き固体電解質膜を得た。各評価も、実施例1と同様にして行った。QPACは、登録商標である。
使用したフィルムを、リンテック株式会社製「NF SP-PET3801(商品名)」[厚さ38μmの基材(ポリエチレンテレフタレートフィルム)の一方の面上に、シリコーン樹脂系剥離剤層を有するフィルム]に変更した以外は、実施例1と同様にして、フィルム付き固体電解質膜を得た。各評価も、実施例1と同様にして行った。
使用したフィルムを、リンテック株式会社製「NF SP-PET3801(商品名)」に変更した以外は、実施例2と同様にして、フィルム付き固体電解質膜を得た。各評価は、実施例1と同様にして行った。
使用したフィルムを、リンテック株式会社製「NF SP-PET381031C(商品名)」[厚さ38μmの基材(ポリエチレンテレフタレートフィルム)の一方の面上に、シリコーン樹脂系剥離剤層を有するフィルム]に変更した以外は、実施例1と同様にして、フィルム付き固体電解質膜を得た。各評価も、実施例1と同様にして行った。
使用したフィルムを、リンテック株式会社製「NF SP-PET381031C(商品名)」に変更した以外は、実施例2と同様にして、フィルム付き固体電解質膜を得た。各評価は、実施例1と同様にして行った。
使用したフィルムを、厚み100μmのナフロンシート(アズワン社製)に変更し、当該フィルムの表面にコロナ処理機(春日電機株式会社製「CORONA STATION」)で放電量20W・min/m2の処理を施した以外は、実施例1と同様にして、フィルム付き固体電解質膜を得た。各評価も、実施例1と同様にして行った。
使用したフィルムを、厚み100μmのナフロンシート(アズワン社製)に変更し、当該フィルムの表面にコロナ処理機(春日電機株式会社製「CORONA STATION」)で放電量20W・min/m2の処理を施した以外は、実施例2と同様にして、フィルム付き固体電解質膜を得た。各評価は、実施例1と同様にして行った。
使用したフィルムを、三菱樹脂社製「PET38 T-100(商品名)」に変更した以外は、実施例1と同様にして、フィルム付き固体電解質膜を得た。各評価も、実施例1と同様にして行った。
使用したフィルムを、三菱樹脂社製「PET38 T-100(商品名)」に変更した以外は、実施例2と同様にして、フィルム付き固体電解質膜を得た。各評価は、実施例1と同様にして行った。
使用したフィルムを、厚み100μmのナフロンシート(アズワン社製)に変更した以外は、実施例1と同様にして、フィルム付き固体電解質膜を得た。各評価も、実施例1と同様にして行った。ナフロンは、登録商標である。
使用したフィルムを、厚み100μmのナフロンシート(アズワン社製)に変更した以外は、実施例2と同様にして、フィルム付き固体電解質膜を得た。各評価は、実施例1と同様にして行った。
使用したフィルムを、リンテック株式会社製「PET38 AL-5(商品名)」に変更した以外は、実施例1と同様にして、フィルム付き固体電解質膜を得た。各評価も、実施例1と同様にして行った。
使用したフィルムを、リンテック株式会社製「PET38 AL-5(商品名)」に変更した以外は、実施例2と同様にして、フィルム付き固体電解質膜を得た。各評価は、実施例1と同様にして行った。
使用したフィルムを、リンテック株式会社製「NF SP-PET3801(商品名)」に変更し、当該フィルムのシリコーン樹脂系剥離剤層の表面にコロナ処理機(春日電機株式会社製「CORONA STATION」)で放電量20W・min/m2の処理を施した以外は、実施例1と同様にして、フィルム付き固体電解質膜を得た。各評価も、実施例1と同様にして行った。
使用したフィルムを、リンテック株式会社製「NF SP-PET3801(商品名)」に変更し、当該フィルムのシリコーン樹脂系剥離剤層の表面にコロナ処理機(春日電機株式会社製「CORONA STATION」)で放電量20W・min/m2の処理を施した以外は、実施例2と同様にして、フィルム付き固体電解質膜を得た。各評価は、実施例1と同様にして行った。
一方、比較例1、比較例2、比較例5、比較例6、比較例7、および比較例8では、ハジキによる固体電解質膜の形状のばらつきはなかったが、剥離性が悪かった。また、比較例3および比較例4では、剥離性は良好であったが、ハジキによる固体電解質膜の形状のばらつきが見られた。
Claims (4)
- アセトニトリルに対する接触角が35度以上75度以下であり、かつクロロホルムに対する接触角が15度以上40度以下である面を有するフィルムと、
前記フィルムの前記面に接する固体電解質膜と、を備える、
フィルム付き固体電解質膜。 - 前記固体電解質膜が、質量平均分子量1万以上の高分子化合物と、金属塩とを含む、請求項1に記載のフィルム付き固体電解質膜。
- 前記金属塩が、リチウム塩である、請求項2に記載のフィルム付き固体電解質膜。
- アセトニトリルに対する接触角が35度以上75度以下であり、かつクロロホルムに対する接触角が15度以上40度以下であるフィルムの面に、固体電解質膜形成用組成物を塗布する工程と、
塗布された前記固体電解質膜形成用組成物を硬化させて固体電解質膜を形成する工程と、を有する、
フィルム付き固体電解質膜の製造方法。
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JP7542817B2 (ja) | 2020-05-29 | 2024-09-02 | エンテックアジア株式会社 | 固体電解質含有繊維製品の製造方法及び固体電解質被覆繊維の製造方法 |
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US20220093958A1 (en) * | 2020-09-24 | 2022-03-24 | International Business Machines Corporation | Ion-conducting membrane for batteries |
US20230035720A1 (en) * | 2021-07-30 | 2023-02-02 | Solid Energies Inc. | Large-dimension, flexible, ultrathin high-conductivity polymer-based composite solid-state electrolyte membrane |
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