Patent ID: 7595121

Claim:
An electrolyte membrane for a fuel cell comprising a laminated structure of a proton conductive polymer and a perfluorocarbonsulfonic acid containing polymer membrane, wherein the proton conductive polymer comprises a polymer including at least one repeating unit selected from the following chemical formulas 1-5: wherein A is a valence or a bivalent organic group, R is a hydrogen atom, R 1 is at least one selected from the group consisting of hydrogen atom, halogen atom, substituted or unsubstituted amino group, substituted or unsubstituted alkoxy group, and substituted or unsubstituted hydrocarbon group, and R 2 is at least one selected from the group consisting of hydrogen atom, halogen atom, substituted or unsubstituted amino group, substituted or unsubstituted alkoxy group, and substituted or unsubstituted hydrocarbon group, and wherein the proton conductive polymer film is different from the perfluorocarbonsulfonic acid containing polymer membrane.