ELECTRIC DOUBLE LAYER CAPACITOR

摘要

PURPOSE:To contrive to reduce an internal resistance and make a capacity higher to improve a withstand voltage by constituting an apparatus of polarizable electrodes using an activated carbon block formed by carbonization and activation of a resin foam and of specific electrolytic solution coming in contact with the electrodes. CONSTITUTION:An activated carbon block is formed by carbonization and activation of a phenol formalin resin foam, substantially has an open-cell structure and has 0.1g/cm<3> or more bulk density and 500m<2>/g or more specific surface area. A pair of polarizable electrodes 1, 1 using the block and separator 3 arranged between are housed in a case 5 and impregnated with an electrolytic solution. This electrolytic solution is an organic electrolytic solution formed by dissolution of an electrolyte and ether compound represented by formula [I] in an organic solvent with 1.5cps [25 deg.C] or more viscosity. In the formula, R<1> and R<2> are straight chain or branched alkyl group with 1-4C and may be identical or different or may form a ring jointly.