Patent ID: 7759289
Filing Date: 2010-07-20
Classification: C01B,H01G,Y02E

Abstract:
1. A method for manufacturing a polarizing electrode for an electrical double layer capacitor, comprising: subjecting an easily graphitizable carbonaceous material to an alkali activation treatment; washing the alkali activation treatment product thus obtained with a liquid comprising carbonic acid; washing the carbonic acid washed product with hydrochloric acid to give an activated carbon, and preparing the polarizing electrode by mixing and forming the hydrochloric acid washed activated carbon, at least one binder and a conductive material, wherein the activated carbon has an overall content of alkali metals of 60 ppm or less, and the easily graphitizable carbonaceous material is one selected from the group consisting of a petroleum coke, a petroleum pitch, a synthetic mesophase pitch, a polyvinyl chloride, a polyimide and a polyacrylonitrile.