Patent ID: 8728662

Claim:
An electrode active material including a polyradical compound, comprising: a repeated structural unit represented by the following general formula (1): wherein R 1 to R 3 each independently represent hydrogen or methyl group and R 4 to R 7 each independently represent C 1 to C 3 alkyl group, wherein said polyradical compound is formed by crosslinking said structural unit with a bifunctionalized crosslinking agent having two polymerizing groups represented by the following general formula (2): wherein R 8 to R 13 each independently represent hydrogen or methyl group, X represents a single bond, a linear, a branched or a cyclic C 1 to C 15 alkylenedioxy group, an alkylene group, a phenylenedioxy group, a phenylene group or a structure represented by general formula (3): wherein k represents an integer of 2 to 5, wherein, the polyradical compound is utilized in at least one of a positive electrode and a negative electrode of a battery cell, said battery cell comprises, at least, said positive electrode, said negative electrode and an electrolyte.