| abstract |
PURPOSE:To obtain the title capacitor of high breakdown voltage and low internal resistance by a method wherein the capacitor is composed of polarizable electrodes, which are formed using polysaccharides and their derivatives as a binding agent and arranged through a separator, and an electrolyte. CONSTITUTION:Activated charcoal powder 6, a conductivity-giving agent 8 and carboxymethyl cellulose are dissolved into water, the dissolved material is applied on the aluminum foil which is roughened by a chemical etching method, and a polarizable electrode body 1 is formed. A pair of the polarizable electrode bodies 1 obtained as above are wound through the intermediary of a separator. The mixture obtained by dissolving tetraethylammonium tetrafluoroborate into propylene carbonate is used as an electrolyte, an aluminum lead 4, which is connected to the polarizable electrode 1 through the intermediary of a rubber packing 3, is led out and a housing is completed using an aluminum case 5 and a rubber packing 3. As a result, the distance between the activated charcoal powders in the polarizable electrode 1, in which activated charcoal and polysaccharides and their derivatives are used as a binding agent, becomes one-third or smaller of the conventional articles, the conductivity of the polarizable electrode is excellent and its resistance is small. |