STUDY ON HIGH SPECIFIC SURFACE AREA ACTIVATED CARBON BASED ON BAMBOO CHAR FOR ELECTRIC DOUBLE-LAYER CAPACITOR

The high-specific surface area activated carbon was prepared from mixture of bamboo char which was carbonization in different temperature under isolation air and KOH.The effects of the carbonization temperature ,the quality ratio between potassium and bamboo char,activation temperature and activation time on specific capacitance of high-specific area activated carbon and charge-discharge property of electric double-layer capacitor were discussed.The results show that the specific capacitance of high surface area activated carbon can reach 55 F/g when controlling suitable carbonization and activation technology condition and the electric double-layer capacitor used the activated carbon as electrode materials have good charge/discharge properties and cycling property.Because the eletric double-layer capacitor has high inner resistance,its capacitance drop quickly when discharging at big current.