ELECTRIC DOUBLE-LAYER CAPACITORS WITH SHEET-TYPE POLARIZABLE ELECTRODES AND APPLICATION OF THE CAPACITORS

Sheet-type polarizable electrodes with low sheet resistances for elect ric double-layer capacitors were outlined. The sheet-type electrodes c onsisted of activated carbon layers on aluminium foils. The sheet resi stance of the sheet-type electrode mainly correlated with a filling de nsity of activated carbons in the carbon layer. The species of activat ed carbons and the particle size of activated carbons affected the fil ling density of activated carbons in the layer. High filling ratio of activated carbons with small particle size resulted in the sheet-type electrodes with very low sheet resistance and high capacitance. Capaci tors employing sheet-type electrodes showed very low internal resistan ce. Some application examples of the capacitor are described.