SOLID ELECTROLYTE FILM, METHOD FOR PRODUCING SAME, MEMBRANE-ELECTRODE ASSEMBLY FOR A FUEL CELL, POLYMER ELECTROLYTE FUEL CELL, AND DIRECT METHANOL FUEL CELL

摘要

A solid electrolyte film according to the present invention includes a resin having a repeating unit of the general formula (1) containing a bis(perfluoroalkanesulfonyl)methide moiety: where R represents a hydrogen atom or a methyl group; Y represents an oxygen atom or NH; Rf represents a C 1 -C 4 perfluoroalkyl group; and W represents either a C 2 -C 4 straight or C 3 -C 4 branched alkylene group or a C 5 -C 8 cyclic hydrocarbon group as a linking group, which may have a branched chain or a cross-linking structure. This solid electrolyte film combines high proton conductivity with low methanol permeability for prevention of methanol crossover and can suitably be used for a direct methanol fuel cell etc.