Patent ID: 7736539

Claim:
A polymer consisting of linked units, wherein each of at least 80% of the linked units consists of one ion-conducting region and one spacer region connected thereto, wherein a) the ion-conducting region consists of one or more aromatic groups, each of the one or more aromatic groups being adjacent to at least one electron-donating group and each of the one or more aromatic groups having attached thereto at least one pendant ion-conducting functional group, wherein if the ion-conducting region includes two or more aromatic groups, then at least two of the aromatic groups are optionally connected by electron-donating groups; and b) the spacer region consists of at least four aromatic groups, each of the at least four aromatic groups being adjacent to at least one electron-withdrawing group and none of the at least four aromatic groups having attached thereto an ion-conducting functional group, wherein at least two of the at least four aromatic groups are optionally connected by electron-withdrawing groups.