SOLID POLYMER ELECTROLYTE, MEMBRANE USING IT, ELECTROLYTE/CATALYST ELECTRODE ASSEMBLY, MEMBRANE/ELECTRODE ASSEMBLY AND FUEL CELL

摘要

PROBLEM TO BE SOLVED: To provide an easily manufacturable solid polymer electrolyte, while overcoming a weak point of inferior oxidation resistance of a sulfonated aromatic polymer compound used as a substitute for an expensive fluorine-based solid polymer electrolyte membrane, inexpensive as compared with the fluorine-based solid polymer electrolyte membrane, and having practically sufficient ion conductivity and high durability characteristic, and also to provide: a solid polymer electrolyte membrane formed of the solid polymer electrolyte; an electrolyte/catalyst electrode assembly formed of the solid polymer electrolyte; a membrane/electrode assembly using the electrolyte/catalyst electrode assembly; and a fuel cell using the membrane/electrode assembly.

SOLUTION: This solid polymer electrolyte is provided by introducing a proton conductive substituted group in a side chain of a hydrocarbon-based polymer comprising repeating units each having a structure expressed by formula (1) in a principal chain.

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