Patent ID: 7476465

Claim:
An electrode active material including a compound having a diazine-N,N′-dioxide structure, the electrode active material comprising: an oligomer or polymer compound containing in a side chain at least one monovalent group with one bond in a ring of the diazine-N,N′-dioxide structure shown by a general formula (1) described below, where x, y, x′ and y′ independently show integer numbers of 0 or more respectively, the order of condensation of diazine rings and benzene rings may be alternate or random, one of substituents R 1 , R 2 , R 3 , R 4 , R a , R b , R c , and R d shows at least one monovalent group having the one bond and the other substituents independently show hydrogen atom, halogen atom, hydroxyl group, nitro group, nitroso group, cyano group, carboxyl group, substituted or unsubstituted alkyl group, substituted or unsubstituted alkenyl group, substituted or unsubstituted cycloalkyl group, substituted or unsubstituted aromatic hydrocarbon group, substituted or unsubstituted heteroaromatic group, substituted or unsubstituted aralkyl group, substituted or unsubstituted amino group, substituted or unsubstituted alkoxy group, substituted or unsubstituted allyloxy group, substituted or unsubstituted alkoxycarbonyl group, substituted or unsubstituted allyloxycarbonyl group, substituted or unsubstituted acyl group, or substituted or unsubstituted acyloxy group, R a on each benzene ring is same or different and R b on each benzene ring is same or different if x is 2 or more, and R c on each benzene ring is same or different and R d on each benzene ring is same or different if x′ is 2 or more, wherein the molecular weight of the polymer compound is in a range of approximately 1000 to 500000.