HIGH ENERGY DENSITY ELECTRIC DOUBLE LAYER CAPACITOR

摘要

PROBLEM TO BE SOLVED: To provide activated carbon for the electrode of an electric double layer capacitor having a larger capacitance by modifying the conventional activated carbon for the electrode of the electric double layer capacitor. SOLUTION: The activated carbon for the electrode of the electric double layer capacitor is heated at 700-1000°C by itself or with metallic salts in a steam or gaseous carbon dioxide atmosphere for modification. These modified activated carbon can form a larger capacitance in the electric double layer capacitor compared with the unmodified activated carbon. Hence, it is possible to provide the high energy density electric double layer capacitor. COPYRIGHT: (C)2004,JPO