Patent ID: 8034484

Claim:
A secondary battery, comprising a positive electrode, a negative electrode and an electrolyte, wherein at least one of said positive electrode and said negative electrode includes an electrode active material comprising a polymer compound having a structure represented by the general formula (1a): where X is a sulfur atom or an oxygen atom; each of R 1 to R 4 is independently a linear or cyclic aliphatic group, a hydrogen atom, a hydroxyl group, a cyano group, an amino group, a nitro group or a nitroso group; each of R 5 and R 6 is independently a linear or cyclic aliphatic group, or a hydrogen atom; said aliphatic group includes at least one selected from the group consisting of an oxygen atom, a nitrogen atom, a sulfur atom, a silicon atom, a phosphorus atom, a boron atom, and a halogen atom, and wherein any from the group consisting of R 3 , R 4 , R 5 or R 6 is further bonded to another molecule in a polymer chain.