To provide a polymer electrolyte composition achieving excellent fuel cell with prolonged stability; a polymer electrolyte membrane; a catalyst composition; a membrane-electrode assembly; and a polymer electrolyte fuel cell.
A polymer electrolyte composition includes a polymer electrolyte and a sulfur-containing polymer, where the sulfur-containing polymer has a first structural unit represented by formula (1) and a second structural unit represented by formula (2). In formulae, Ar01 and Ar02 are each an arylene group; E01 is a direct bond, thio group, sulfinyl group or oxy group; E02 is a thio group or sulfinyl group; Ar03 and Ar04 are each an arylene group; E03 is a direct bond, thio group, sulfinyl group, oxy group or a group represented by formula (3); Y01 is a direct bond, oxy group, carbonyl group, sulfonyl group or a group represented by formula (3); R1 and R2 are each H, an alkyl group, alkoxy group, aryl group, aryloxy group or acyl group.
ISHIYAMA TAKESHI
Naozumi Hiroyasu
Norihiko Ara
Hiroyuki Kato
Mitsunaga Igarashi