CATALYST ELECTRODE, MEMBRANE ELECTRODE ASSEMBLY, AND SOLID POLYMER ELECTROLYTE FUEL CELL

摘要

PROBLEM TO BE SOLVED: To provide a catalyst electrode having superior protonic conductivity and durability, and a membrane electrode assembly that has the catalyst electrode, and to provide a polymer electrolyte fuel cell.

SOLUTION: The catalyst electrodes 12A, 12B include at least a catalyst 13A, and a polymer electrolyte 14. The polymer electrolyte is sulfonated aromatic polyimide with siloxane bond. The membrane electrode assembly 10 includes, at least an electrolyte membrane 15 and the catalyst electrode jointed on a surface of the electrolyte membrane via an electrolyte binder 16. The polymer electrolyte fuel cell has at least the membrane electrode assembly.

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