POLYMER ELECTROLYTE COMPOSITION AND POLYMER ELECTROLYTE MEMBRANE, POLYMER ELECTROLYTE MEMBRANE WITH CATALYST LAYER, MEMBRANE ELECTRODE ASSEMBLY, AND POLYMER ELECTROLYTE FUEL CELL EACH USING THE SAME

摘要

A polymer electrolyte composition having excellent chemical stability to withstand a strong oxidizing atmosphere during fuel cell operation, excellent proton conductivity under low humidity conditions, excellent mechanical strength, and excellent practicality capable of achieving physical durability, and a polymer electrolyte membrane using the same , A membrane electrode composite, and a polymer electrolyte fuel cell. A polymer electrolyte composition comprising an ionic group-containing polymer (A), a phosphorus-containing additive (B), and a nitrogen-containing aromatic ring additive (C), wherein the phosphorus-containing additive (B) and the nitrogen-containing aromatic ring additive (C) are It is a polymer electrolyte composition which is a compound represented by a specific structural formula.