Patent ID: 6955712

Claim:
A proton-conducting polymer having a repeating unit of formula (1) below: where each of A 1 and A 3 , which may be the same or different, is a tetravalent group having at least one selected from the group consisting of C 6 -C 10 aromatic ring and C 4 -C 9 heteroaromatic ring including one or ore hetero atoms chosen from among S, N, and O; A 2 is a divalent group having at least one C 6 -C 10 aromatic ring and/or aliphatic compound; A 4 is a trivalent a tetravalent group having at least one C 6 -C 10 aromatic ring; A 5 is a divalent group having at least one C 6 -C 10 aromatic ring: BH is at least one proton-bearable acid group selected from the group consisting of a sulfonic acid group, a phosphoric acid group, and sulfonyl(trifluoromethylsulfonyl) imide group; and n and m are integers from 0 to 20, which may be the same or different, and n/n+m=0˜0.95 where n+m≠0.