Patent ID: 7816052

Claim:
A proton conductive electrolyte, comprising a polymerization product obtained by polymerizing a mixture of a polyurethane based compound represented by formula 1 and a polyethylene(metha)acrylic acid represented by formula 2: where R is a substituted or unsubstituted C1-C20 alkylene group, a substituted or unsubstituted C4-C20 cycloalkylene group, a substituted or unsubstituted C6-C20 arylene group, or substituted or unsubstituted C2-C20 heteroarylene group, a is a number between 10 and 500, and B + is H + , NH 4 + , or an alkali metal ion; and where R′ is hydrogen or a methyl group, m ranges from 70 to 90 mol %, n ranges from 10 to 30 mol %, and b is a number between 50 and 1000.