. "Although the positive electrode active substance for the secondary battery is not specifically defined, it may be freely selected from among such positive electrode active substances as FeS2, TiS2, TiS3, MnO2, Li1-x CoO2 (wherein 0???x???1), V2 O5, MoO3, CuF2, halogen such as iodine, bromine, chlorine, etc., P-type polyacetylene, P-type polyparaphenylene, and P-type polypyrrole." . . .