Patent ID: 7862922

Claim:
A polymer electrolyte membrane, comprising: a proton-conducting polymer selected from the group consisting of a polymer represented by one of Formula 1 and Formula 4 and a combination thereof: (H + ) x [M((O(CH 2 ) y O) z Râ€²) a ((O(CH 2 ) yâ€² O) zâ€² Râ€³) b ((O(CH 2 ) yâ€³ O) zâ€³ Râ€²â€³) c ] âˆ’x (1) wherein M is Al, Au, Co, Cr, Fe, Ce, In, Mn, Ti, or V; x is 0 or 1 depending upon a valence of M; y, yâ€² and yâ€³ are independently integers ranging from 1 to 6; z, zâ€² and zâ€³ are integers ranging from 10 to 1000; Râ€², Râ€³ and Râ€²â€³ are independently H, or an alkyl group; and a, b and c are determined depending upon a valence of M and range from 0 to 6, and the sum of a, b and c is not more than 6, but is more than 0; and wherein M is Al, Au, Co, Cr, Fe, Ce, In, Mn, Ti, or V; x is 0 or 1 depending upon a valence of M; m and mâ€² are integers ranging from 1 to 5; n and nâ€² are integers ranging from 5 to 1000; R 1 to R 6 are independently H, or an alkyl group; and d and e are determined depending upon a valence of M and range from 0 to 6, and the sum of d and e is not more than 6, but is more than 0.