FILM-CATALYST LAYER ASSEMBLY, FILM-ELECTRODE ASSEMBLY, AND POLYMER ELECTROLYTE TYPE FUEL CELL

摘要

A catalyst-coated membrane includes: a first catalyst layer (2a) and a second catalyst layer (2b) which are opposed to each other; a polymer electrolyte membrane 1 which is disposed between the first catalyst layer (2a) and the second catalyst layer (2b) and has a first main surface (F10) and a second main surface (F20) which are opposed to each other; and a membrane catalyst concentration reduced region 80 which is formed so as to contact an outer periphery of the first catalyst layer (2a) and the first main surface (F10) of the polymer electrolyte membrane 1 and has hydrogen ion conductivity and fire resistance, wherein: an outer periphery of the main surfaces of the second catalyst layer (2b) is located between an edge of the membrane catalyst concentration reduced region (80) which edge contacts the first catalyst layer (2a) and an edge opposed to the edge contacting the first catalyst layer (2a); and the membrane catalyst concentration reduced region (80) includes a first portion (8) which contacts the first main surface (F10) of the polymer electrolyte membrane (1) and has the hydrogen ion conductivity and the fire resistance and a second portion (81) which is a remaining portion other than the first portion (8), has the hydrogen ion conductivity and the fire resistance, and contains a catalyst.