ELECTRIC DOUBLE-LAYER CAPACITOR AND CARBON MATERIAL USED FOR THE CAPACITOR

摘要

PROBLEM TO BE SOLVED: To provide an electric double-layer capacitor exhibiting good low- temperature properties and a carbon material used for its electrodes. SOLUTION: An electric double layer capacitor is formed by using a nonaqueous electrolytic solution and polarized electrodes, containing mainly a carbon material for the two poles. In this case, the carbon material is formed by treating a carbon raw material in alkaline. The inter-face distance d002 measured by X-ray diffraction is 0.365 nm or less, and the ratio of surface area to BET measured by nitrogen adsorption method is 0.5 m<2> /g-290 m<2> /g.