SOLID ELECTROLYTE FILM, AND METHOD FOR PRODUCING SAME

摘要

Disclosed is a solid electrolyte film which comprises a resin having a repeating unit containing a bis(perfluoroalkanesulfonyl)methide moiety represented by general formula (1). (In the formula, R represents a hydrogen atom or a methyl group, and Y represents an oxygen atom or NH. Rf represents a C1-4 perfluoroalkyl group. W is a linking group, represents a C2-4 straight-chained or a C3-4 branched alkylene group or a C5-8 cyclic hydrocarbon group, and may have a branched or crosslinked structure.) Said solid electrolyte film has high proton conductivity and low methanol permeability for the purpose of inhibiting methanol from crossing over, and is suitable for use in direct methanol fuel cells.