Electrode of electrical double-layer capacitor

PURPOSE: To obtain electrodes which make an electric double-layer capacitor of large capacitance/volume by increasing the surface area of activated carbon rather than by changing the degree of activation. CONSTITUTION: Pitch material is spun into fiber through a melt spinning method, and fiber is thermally treated into carbon fiber. Carbon fiber is activated with alkaline metal hydroxide water solution, deashed with water or acid, and ground into powder whose maximum diameter is less than 0.2mm, and carbon power is molded into the electrode of an electric double-layer capacitor. COPYRIGHT: (C)1993,JPO&Japio