高分子電解質組成物、高分子電解質膜、及び膜−電極接合体

摘要

Provided is a polyelectrolyte composition which is inhibited from suffering chemical deterioration and which hence is suitable for use in applications such as polymer electrolyte membrane fuel cells and can render life prolongation possible. Also provided are a polyelectrolyte membrane and a membrane/electrode assembly. The polyelectrolyte composition is characterized by comprising a polyelectrolyte having ion-conductive groups and elemental phosphorus, the amount of the phosphorus being 0.02-25 parts by mass per 100 parts by mass of the polyelectrolyte.