BATTERY

摘要

PURPOSE:To obtain a lightweight secondary battery in which self-discharge is small and discharge capacity is sufficient by using an active material obtained by mixing polypyrrole powder and polyaniline powder in a specified ratio and press-molding the mixture as an electrode. CONSTITUTION:An active material obtained by mixing polypyrrole powder and polyaniline powder so that the mixing ratio of the polyaniline is 5-50% based on the total weight and by press-molding the mixture is used as at least one electrode. Since polyaniline is used as a binder and an active material, the density of polypyrrole per area can be increased without the sacrifice of charge-discharge performance. A lightweight secondary battery in which selt- discharge is small and discharge capacity is sufficient is obtained.