| 摘要 |
PURPOSE:To increase electric capacity by activating a carbon porous material, heat- treating the carbon porous material in vacuum to give active carbon and forming an electrical double layer capacitor comprising a polarizable electrode containing the active carbon and an electrolyte solution in contact with the electrode. CONSTITUTION:Resin foam comprising a resol type phenolic resin is processed into a given shape and calined at 500-1,200 deg.C in a nonoxidizing atmosphere to give a blocked porous material. Then the blocked porous material is activated in the presence of an oxidizing gas such as steam at 800-1,200 deg.C into >=0.1g/cm<3> bulk density and >=500m<2>/g specific surface area, and heat-treated under <=10<-2>Torr degree of vacuum in an inert gas flow at 60-250 deg.C to give a blocked active carbon. Then the active carbon trimmed into a given shape to give polarizable electrodes 1. The electrode and a separator 3 are degassed and impregnated with an electrolyte prepared by dissolving an organic electrolyte such as tetraethylammonium tetrafluoroborate in an organic solvent. Then, a pair of polarizable electrodes 1 are arranged while laying the separator 3 between the electrodes and providing a collector 2 such as graphite outside, put in a plastic case and screwed through an insulating packing 4 to give an electrical double layer capacitor. |
