Patent ID: 8163406

Claim:
A membrane-electrode assembly for solid polymer electrolyte fuel cell, comprising: an anode electrode, a cathode electrode, and a proton conductive membrane, the anode electrode and the cathode electrode being disposed on opposite sides of the proton conductive membrane, wherein the proton conductive membrane includes a repeating constitutional unit represented by the formula (1): wherein, A and D, independently from each other, are a direct bond or are selected from the group consisting of: —O—, —S—, —CO—, —SO 2 —, —SO—, —CONH—, —COO—, —(CF 2 ) i —, —(CH 2 ) j —, —CR′ 2 —, a cyclohexylidene group, and a fluorenylidene group, wherein i is an integer of 1 to 10, wherein j is an integer of 1 to 10, and wherein R′ represents an aliphatic hydrocarbon group, an aromatic hydrocarbon group, or a halogenated hydrocarbon group; B represents an oxygen atom or a sulfur atom; Ph represents a fused aromatic ring; R 1 to R 2 ° may be the same or different from each other and represent at least one atom or group selected from the group consisting of: a hydrogen atom, a fluorine atom, an alkyl group, a partly or fully halogenated alkyl group, an ally! group, an aryl group, a nitro group and a nitrile group; I and m are an integer of 0 to 4; q is an integer of 2 or greater; t is an integer of 0 to 4; and n and p represent the composition ratio of each unit where p is a value greater than 0 and 1 or less, and n+p is 1.