POLYMER ELECTROLYTE MEMBRANE, MEMBRANE ELECTRODE ASSEMBLY AND FUEL CELL

摘要

A polymer electrolyte membrane which comprises: a membrane-like base material that is formed of a polymer electrolyte; and metal fine particles that are dispersed in the base material. The material which forms the metal fine particles contains one or more metals that are selected from the group consisting of noble metals and noble metal alloys, and the metal fine particles are dispersed so as to have a concentration gradient in the thickness direction of the base material.