摘要
竹节在隔绝空气的条件下 ,经不同温度炭化处理后与 KOH混合 ,制取竹节基高比表面积活性炭。考察了炭化温度、KOH与竹节炭的质量比、活化温度和活化时间对所得高比表面积活性炭比电容的影响和组装的双电层电容器的充放电特性。研究结果表明 ,控制适宜的炭化、活化工艺条件可制得比电容达 5 5 F/ g的竹节基高比表面积活性炭 ,由它组装的双电层电容器具有良好的充放电性能和循环性能。但内阻过高 。
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.
出处
《炭素》
2002年第1期11-15,共5页
Carbon
基金
湖南省自然科学基金 (0 1JJY10 0 5 )
关键词
竹节
高比表面积活性炭
双电层电容器
比电容
充放电特性
bamboo char
high surface area activated carbon
electric double-layer capacitor
specific capacitance
charge-discharge properties
