ELECTRIC DOUBLE LAYER CAPACITOR

PURPOSE:To improve a good temperature characteristic and a stable passage-of- time characteristic by a method wherein an element is constituted by laying a separator and an electrolyte between carbon electrodes composed of an active charcoal fiber fabric and carbon black is mixed with the electrolyte. CONSTITUTION:An aluminum layer as a polarizing electrode is formed by a plasma flame-spraying operation on one face of an active charcoal fiber fabric. Two sheets of the active charcoal fiber fabric of 6mm in diameter are formed; a metal case of 11mm in outer diameter, a metal lid and a stopper are prepared; the metal lid composed of an SUS 304 material whose potential is made negative and the metal case whose potential is made positive, whose inner face is composed of aluminum and whose external face is composed of the SUS 324 material are made clad and are united. A separator is composed of a nonwoven fabric of a polypropylene fiber; the stopper is composed of a polypropylene resin molded substance. An electrolyte is composed of propylene carbonate and 1mol of tetraethylammonium tetrafluoroborate; 30mul of this electrolyte is used.