Patent ID: 7544441

Claim:
A secondary battery utilizing an electrode reaction of active material, wherein a reactant is a radical compound represented by formulae (1), (2), (4) and (5), wherein said electrode reaction is a discharge reaction cleaving a bond of said radical compound and an electrolytic anion, wherein said electrolytic anion is selected from BF 4 − , CF 3 SO 3 − , (CF 3 SO 2 ) 2 N − , (C 2 F 5 SO 2 ) 2 N − , (CF 3 SO 2 ) 3 C − , or (C 2 F 5 SO 2 ) 3 C − , and a charge reaction as a reverse reaction to said discharge reaction: wherein in the formula (1), X 1 and X 2 each independently represents a group represented by the formula (3), an alkoxyl group, a halogen atom, a hydroxyl group or a cyano group, and R 1 to R 8 each independently represents a hydrogen atom or an alkyl group; wherein in the formula (2), X 1 represents a group represented by the formula (3), an alkoxyl group, a halogen atom, a hydroxyl group or a cyano group, and R 1 to R 4 each independently represents a hydrogen atom or an alkyl group, and R 9 represents a group represented by the formula (3); wherein in the formula (3), R 10 represents an alkyl group or a substituted or unsubstituted phenyl group; wherein in the formula (4), R 11 to R 14 each independently represents a hydrogen atom, an alkyl group, an alkoxyl group, a cyano group, or a halogen atom, and n represents a natural number; wherein in the formula (5), R 15 to R 18 each independently represents a hydrogen atom, an alkyl group, an alkoxyl group, a cyano group, a nitro group or a halogen atom.