| abstract |
An object of the present invention is to provide a polymer electrolyte composition excellent in practicability, and a polymer electrolyte membrane, a membrane electrode assembly, and a solid polymer fuel cell using the same, the polymer electrolyte composition not only having the ability to withstand fuel The excellent chemical stability of the strong oxidizing atmosphere in the battery operation, but also the excellent proton conductivity, the excellent mechanical strength and the physical durability under low humidification conditions can be achieved. The polymer electrolyte composition contains an ionic group-containing polymer (A), a compound (B) having an azole ring, and an additive (C) containing a transition metal selected from cobalt, nickel, ruthenium, and rhodium , palladium, silver and one or more of the group consisting of gold. |