SOLID POLYMER ELECTROLYTE MATERIAL, LIQUID COMPOSITE, SOLID POLYMER FUEL CELL, FLUORINE-CONTAINING POLYMER AND SOLID POLYMER ELECTROLYTE FILM CONSISTING OF FLUORINE-CONTAINING POLYMER

摘要

PROBLEM TO BE SOLVED: To provide a solid polymer fuel cell which can constantly obtain a high fuel output power by involving a solid polymer electrolyte material with excellent ionie conductivity, water repellency and gas permeability, and further, to provide a solid polymer electrolyte material with high softening temperature suitable for a high-temperature operation. SOLUTION: The solid polymer electrolyte material consists of copolymers containing a repetition unit based on a fluorine-containing polymer giving a main chain a polymer having an aliphatic ring structure and a repetition unit based on a fluorine-containing vinyl compound as expressed with CF2 = CF(Rf )j SO2 X. [j is 0 or 1, X denotes a group expressed by F, Cl, or OM (M denotes H, Na, K or the like), and Rf denotes a perfluoroalkylene group with 1 to 20 carbon number (which may contain oxygen atom of ether linkage property)].