| abstract |
(57) [Summary] [Problem] A high output density per volume, and a small decrease in output density even if charge / discharge cycles are repeated under a large current or a constant voltage is continuously applied for a long time. An activated carbon suitable for an electric double layer capacitor is provided. The activated carbon is obtained by carbonizing coconut. BET specific surface area of 2,000 m 2 / g or more and 2500 m 2 / g Or less, the average pore diameter is 1.95 nm (19.5 °) or more and 2.20 nm (22.0 °) or less, and the pore volume between 50 ° and 300 ° calculated by the Cranston inclay method is 0. electric double layer activated carbon capacitor, wherein 05cm 3 / g or more 0.15 cm 3 / g or less. |