ELECTRIC DOUBLE LAYER CAPACITOR

摘要

PROBLEM TO BE SOLVED: To provide a high energy density electric double layer capacitor which can be charged and discharged quickly, has a high withstand voltage, and is excellent in charging and discharge cycle durability. SOLUTION: An electric double layer capacitor is provided with a positive electrode 1 which is composed of a polarizable electrode and of a porous metal, with a negative electrode 5 which is composed of a carbon-based material formed in such a way that a carbon material which can occlude and desorb Li ions has occluded Li ions by a chemical method and/or an electrochemical method and of a collector by a porous metal and with a non-aqueous electrolytic solution 7 which contains a lithium salt.