POLYACETYLENE ELECTRODE MATERIAL AND SECONDARY BATTERY USING THE SAME

PROBLEM TO BE SOLVED: To provide a proton shift-type secondary battery excellent in safety, reliability and high-speed current characteristic, and having a long life and a high capacity. SOLUTION: As an electrode material, a polyacetylene electrode material is used, capable of charge-discharge reaction by inserting and emitting protons, and having thiophene rings in side chains, or aromatic rings and/or carbazole derivative groups in side chains. This electrode material for the battery is characterized in that the charge-discharge reaction by proton insertion-emission distinguished by including the polyacetylene electrode material and conductive carbon material is possible. It is desirable that the polyacetylene electrode material to be used for the positive active material in the secondary battery in which the positive active material and/or the negative active material are/is the material that performs the charge-discharge reaction by the proton insertion- emission and in which the electrolyte is proton conductive.