SOLID POLYMER FILM, ELECTROLYTE MEMBRANE-ELECTRODE ASSEMBLY, AND SOLID POLYMER ELECTROLYTE FUEL CELL

摘要

PROBLEM TO BE SOLVED: To provide a solid polymer film capable of maintaining excellent durability and dimensional stability for a long period of time even in use under high-temperature environment, as well as an electrolyte membrane-electrode assembly and a solid polymer electrolyte fuel cell using the solid polymer film.

SOLUTION: The solid polymer film 1, equipped with micro pores 2 communicated with each other, is of a glass transition temperature of ≥210°C, and with an area change rate of ≤10% when the micro cores 2 are impregnated with electrolyte. The electrolyte membrane-electrode assembly 4 and the solid polymer electrolyte fuel cell are structured with the use of the solid polymer film 1.

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