ELECTRODE FOR ELECTRIC DOUBLE LAYER CAPACITOR

摘要

PROBLEM TO BE SOLVED: To provide an electrode, for an electric double layer capacitor, which reduces an irreversible capacitance due to a charging operation and a discharge operation and which is favorable to maintain a discharge capacitance when the charging operation and the discharge operation are repeated. SOLUTION: In an electrode for an electric double layer capacitor, active carbon in which the ratio of oxygen atoms to carbon atms is 0.055 or lower is used as a base material. A heat treatment is executed to the active carbon (whose O/C ratio before a heat treatment is 0.061) in a nitrogen airflow at a temperature of 500 to 1100 deg.C, and heat-treated active carbon whose O/C ratio is 0.055 or lower is obtained. The electrode is formed by using the active carbon.