Polymer electrolyte composition and uses thereof

Abstract

The present invention provides a polymer electrolyte composition excellent in radical resistance and/or proton conductivity. The polymer electrolyte composition comprises an aromatic polymer phosphonic acid derivative represented by the following formula (1); and at least one selected from the group consisting of a phosphoric acid derivative and a polymer electrolyte. 1 (wherein —Z— represents —SO2— or —CO—, x and y each represent 0.01-0.99 provided that the sum of x and y is 1, —Ar— represents a divalent aromatic group of 4-18 carbon atoms which may contain a hetero atom and may contain one or more substituents, n represents the average number of substituents per unit structure of polymeric moiety containing the aromatic group and is a positive number of 8 or less, and R and R′ each independently represent a hydrogen atom or an alkyl group).

Dependencies are inferred from the claim text.