# US 8,465,856 B2 · Solid polymer electrolyte membrane and production method of the same

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- Number: US 8,465,856 B2
- Document ID: US8465856B2
- Status: Granted
- Kind: B2
- Application number: 12/805,967
- Filed: 2010-08-26
- Published: 2010-12-30
- Granted: 2013-06-18
- Earliest claimed: 2004-09-09
- Assignees: Asahi Kasei Chemicals Corporation
- Applicants: Yoshinori Yanagita; Kohei Kita; Naoki Sakamoto; Takehiro Koga
- Inventors: Yoshinori Yanagita; Kohei Kita; Naoki Sakamoto; Takehiro Koga
- Web page: https://patentgrep.com/patent/US8465856B2

## CPC

- C08F 6/02: Neutralisation of the polymerisation mass, e.g. killing the catalyst (short-stopping C08F2/42 ){also removal of catalyst residues}
- C08J 5/2237: {containing fluorine}
- C08J 5/2256: {based on macromolecular compounds obtained by reactions other than those involving carbon-to-carbon bonds, e.g. obtained by polycondensation}
- H01M 8/1023: having only carbon, e.g. polyarylenes, polystyrenes or polybutadiene-styrenes
- H01M 8/1025: having only carbon and oxygen, e.g. polyethers, sulfonated polyetheretherketones [S-PEEK], sulfonated polysaccharides, sulfonated celluloses or sulfonated polyesters
- H01M 8/103: having nitrogen, e.g. sulfonated polybenzimidazoles [S-PBI], polybenzimidazoles with phosphoric acid, sulfonated polyamides [S-PA] or sulfonated polyphosphazenes [S-PPh]
- H01M 8/1039: halogenated, e.g. sulfonated polyvinylidene fluorides
- H01M 8/1046: Mixtures of at least one polymer and at least one additive
- H01M 8/1072: by chemical reactions, e.g. in situ polymerisation or in situ crosslinking
- C08J 2327/18: Homopolymers or copolymers of tetrafluoroethylene
- H01M 2300/0082: Organic polymers
- H01M 2300/0091: in the form of mixtures
- Y02E 60/50: Fuel cells
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A polymer electrolyte-containing solution is obtained by preparing a first solution, preparing a second solution and mixing the first and second solutions. The first solution is prepared by dissolving a perfluorocarbonsulfonic acid resin (component A) having an ion-exchange capacity of 0.5 to 3.0 meq/g in a protic solvent. The second solution is prepared separate from the first solution, by dissolving a polyazole-based compound (component B) and an alkali metal hydroxide in a protic solvent. The first and second solutions are mixed to prepare a polymer electrolyte-containing solution in which a weight ratio of the component A to component B, (A/B) , is from 2:3 to 199 and a total weight of the component A and the component B is from 0.5 to 30% by weight on the basis of the solution including the protic solvent. The protic solvent is an aliphatic alcohol.

## Claims

### Claim 1

A polymer electrolyte-containing solution which is obtained by a process comprising:
preparing a first solution by dissolving a perfluorocarbonsulfonic acid resin (component A) having an ion-exchange capacity of 0.5 to 3.0 meq/g in a protic solvent,
preparing a second solution, separate from the first solution, by dissolving a polyazole-based compound (component B) and an alkali metal hydroxide in a protic solvent,
mixing the first and second solutions to prepare the polymer electrolyte-containing solution in which a weight ratio of the component A to the component B, (A/B), is from 2.3 to 199 and a total weight of the component A and the component B is from 0.5 to 30% by weight on the basis of the solution including the protic solvent, wherein the protic solvent is an aliphatic alcohol.

### Claim 2 (depends on 1)

A polymer electrolyte-containing solution wherein an alkali metal ion is decreased or removed by subjecting the polymer electrolyte-containing solution according to claim 1 to a cation-exchange resin treatment and/or a dialysis treatment using a cation-exchange membrane.

### Claim 3 (depends on 1)

The polymer electrolyte-containing solution according to claim 1, wherein the polyazole-based compound is at least one compound selected from the group consisting of a polyimidazole-based compound, a polybenzimidazole-based compound, a polybenzobisimidazole-based compound, a polybenzoxazolebased compound, a polyoxazole-based compound, a polythiazole-based compound and a polybenzthiazole-based compound.

### Claim 4 (depends on 2)

The polymer electrolyte-containing solution according to claim 2, wherein the polyazole-based compound is at least one compound selected from the group consisting of a polyimidazole-based compound, a polybenzimidazole-based compound, a polybenzobisimidazole-based compound, a polybenzoxazolebased compound, a polyoxazole-based compound, a polythiazole-based compound and a polybenzthiazole-based compound.