Fabrication of the electrode for capacitor cell prepared by the electrophoretic deposition method

Abstract

A co-deposited film consisting of activated carbon (AC) and ketjenblack powder (KB) particles was prepared using the electrophoretic deposition (EPD) method and utilized as the electrode for a capacitor cell. As a result of evaluating various organic solvents as the dispersion solvent for the EPD bath, it was found that the best deposition condition was obtained using acetonitrile (AN). However, there was the problem that the co-deposited film consisting of AC and KB particles had a poor adhesion. The co-deposited film fabricated by adding polyvinylidine difluoride (PVdF) as a binder to the bath was able to be used as the electrode for a capacitor cell. The specific capacitance per unit weight of the electrode was almost equal to that of the commercial sheet electrode.