METHOD FOR PRODUCING ELECTROLYTE MATERIAL, MEMBRANE FOR SOLID POLYMER-TYPE FUEL BATTERY AND METHOD FOR PRODUCING ELECTRODE ASSEMBLY

摘要

PROBLEM TO BE SOLVED: To provide a method for producing an electrode material which has a practically sufficient ion exchange capacity and molecular weight, and a high softening temperature, and of which the mechanical strength is maintained even when used in a high-temperature condition.

SOLUTION: The method for producing the electrode material comprising a copolymer containing a monomer unit based on a monomer represented by CF2=CF(CF2CF2)nSO3H (n is an integer of 1-4) and a monomer unit based on tetrafluoroethylene, and having 0.7-1.5 meq./g-dry resin of the ion exchange capacity involves a polymerization step for radically copolymerizing the monomer represented by CF2=CF(CF2CF2)nSO3H and the tetrafluoroethylene at 90-180°C.

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