| 摘要 |
PURPOSE: To obtain an electrical double-layer capacitor which is lessened in resistance caused by macro pores on both an anode side polarizable electrode and a cathode side polarizable electrode and where resistances caused by macro pores on both an anode side and a cathode side are set nearly equal to each other by a method wherein the macro pores on the anode side polarizable electrode are set larger than those on the cathode side polarizable electrode in average diameter. CONSTITUTION: Macro pores on a cathode side are lessened in size as small as possible, and macro pores on an anode side macro pores are enhanced in size, whereby an electrical double-layer capacitor of this constitution is capable of being enhanced in quick charge properties and voltage stability when a large current is discharged without deteriorating in electrostatic capacity. Especially, when macro pores on an anode side are set larger than those on a cathode side in size, the double-layer capacitor is markedly enhanced in quick charge properties and voltage stability. Macro pores on a cathode side are set smaller than 0.7μm in size Dn , and provided that the size of macro pores on an anode side is represented by Dp , Dn and Dp , are so set as to satisfy a formula, Dp /Dn >1.0, to obtain an good result. That is, activated carbon possessed of macro pores distributed in a region where fine holes are larger than 0.1μm in diameter and micro pores distributed in a region where fine holes are smaller than 0.1μm in diameter is contained.
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