Proton-conducting electrolyte membrane, method for producing proton-conducting electrolyte membrane, and polymer electrolyte fuel cell

摘要

Disclosed is a proton conductive electrolyte membrane obtained by filling fine pores of an inorganic porous membrane with a proton conductive polymer. This proton conductive electrolyte membrane is characterized in that the proton reactive polymer is a reaction product of a haloalkylated and sulfonated polymer compound and a compound represented by the general formula (1) below. The proton conductive electrolyte membrane has sufficiently high proton conductivity and adequately low methanol permeability. Also disclosed are a method for producing such a proton conductive electrolyte membrane and a solid polymer fuel cell using such a proton conductive electrolyte membrane. (In the formula, RSUP1/SUP represents an alkyl group having 4 or less carbon atoms, RSUP2/SUP represents an arbitrary organic group, and m and n respectively represent an integer of 1-3. In this connection, m + n = 4 and when m is 2 or 3, RSUP2/SUPs may be different organic groups.)