METHOD FOR MANUFACTURING POLARIZABLE ELECTRODE

摘要

PROBLEM TO BE SOLVED: To obtain an electrical double-layer capacitor with a high capacity density and a low resistance by depositing and adhering a layer with an active carbon as a main constituent to a conductive substrate by cataphoresis electrolytic deposition. SOLUTION: An active carbon powder 10 wt.pts and acetylene black 2 wt.pts are uniformly mixed and dissipated to methanol 5 wt.pts to obtain a liquid A. On the other hand, polyvinylpyrrolidone 2 wt.pt is dissolved to water 10 wt.pts to obtain a liquid B. The liquids A and B are mixed to obtain an active carbon slurry 2. By dipping Al foil which is subjected to surface polishing as a conductive substrate and Al plate as a counter electrode into an active carbon slurry 2 and setting Al foil 3 and Al plate 4 as positive and negative polarities, respectively, DC is applied between both at a room temperature. Then, the Al foil 3 is pulled up from the active carbon slurry 2 and the Al foil with the obtained active carbon layer is dried and is cut to a specific size, thus obtaining a foil electrode and hence obtaining a carbon electrode whose manufacture control can be simplified and which has a uniform film thickness where the volume filling rate of the active carbon is high and the controllability of the carbon film thickness can easily be controlled by an application voltage.