Electr ochemical supercapacitor which has higher energy density than that of electrostatic capacitor and higher power density than that of batteries is a new energy storage eqiupment and component between electrostatic capacitors and batteries. When working with batteries, they can meet the high power out-put need of electric vehicles when starting-up or accelerating. They can also be used in many fields such as hybrid electric vehicle, fuel cell and microcomputer etc. .According to the principle of energy-...