To make feasible of having high electrostatic capacity and extremely low inner resistance also performing high output discharge as an electrode by a method wherein a n activated charcoal material is kept alive under an existing alkali metallic hydroxide, and activated by means of water vapor after removing an alkali metallic compound.
An activated charcoal material is baked under an existing alkali metallic hydroxide. The baking steps are performed but it is preferable that the first step at low temperature, and the second step at high temperature are independently performed. Next, the activated charcoal by such baking steps is cleaned up using water or acid and water again to remove the alkali metallic compound and activated by means of water vapor after drying up if necessary. Steam temperature for activation is to be normally 650-1100°C, preferably, at 670-950°C but as for optimum requirement, at 700-900°C. Besides, the processing time is for 5 min-20 hours, preferably 10 min-10 hours but as for optimum requirement, for 20 min-5 hours. Finally, the partial steam pressure at the steam activating time is 5-100%, preferably 20-80%.
KUROSAKI TAKEO
UEDA SUGURU
MUKAI SEISHI
Next Patent: ELECTROLYTIC CAPACITOR WITH PROTECTOR