有機電解液を用いる電気二重層キャパシタ

抄録

Electric double-layer capacitors based on the charge storage at the interface between a high surface area activatedcarbon electrode and an organic electrolyte solution have been developed, and are widely used as maintenance-freepower source for IC memories and microcomputers. Electric double-layer capacitors exhibit in principle unlimited cyclelife and maintenance free operation as an alternative to batteries in power circuits. One of the new promising applicationfor electric double-layer capacitor is a pulse power source in electric and hybridvehicle application. The pulse powersource provides the peak power during acceleration and recovers energy during braking using a generator. The popularityof these devices is derived from their high energy density compared with conventional capacitors and their long cycle life and high power density relative to batteries. The performance of the capacitor depends not only on materials usedin the cells but also on the construction of the cells. Energy density of electricdouble-layer capacitors reported atpresent is more than 3.5Wh/kg at a power density of 500W/kg.