POLYMER, FESTSTOFFPOLYMER-ELEKTROLYTMEMBRAN FÜR EINE FESTSTOFFPOLYMERBRENNSTOFFZELLE UND MEMBRAN- ELEKTRODEN-ANORDNUNG

摘要

To provide a polymer electrolyte membrane for polymer electrolyte fuel cells, which has a low electrical resistance, high heat resistance and is strong against repeats of swelling and shrinkage; and a membrane/electrode assembly having high power generation performance and excellent in durability. For a polymer electrolyte membrane 15, a polymer comprising units (U1) and units (U2) is used:
Q 1 , Q 2 , Q 3 : a perfluoroalkylene group or the like; R f1 , R f2 : a perfluoroalkyl group; X 1 , X 2 : an oxygen atom or the like; a, b: 0 or the like; Y 1 , Y 2 : a fluorine atom or the like; and s, t: 0 to 1.