| abstract |
An electrochemical capacitor includes: an organic electrolyte solution, and an electrode body including polarized electrodes having, as a main component, a partially oxidized carbon material having fine crystals of graphite-like carbon, a separator, and current collectors, the electrode body being immersed in the organic electrolyte solution, and the polarized electrodes expanding in volume due to charge and contracting in volume due to discharge. Mechanical stress is applied to a carbon material having fine crystals of graphite-like carbon to introduce cracks and/or fractures thereinto, and the carbon material is partially oxidized to give a raw material for the polarized electrodes. The electrochemical capacitor can contribute to an increase in capacity of the capacitor. |