摘要
以烟煤为原料,采用金属催化法制备了具有较大中孔率的含铜活性炭电极材料,测定、比较了氧化铜、普通活性炭和含铜活性炭为原料所制备电极的循环伏安、定电流充放电、交流阻抗等电化学性能,探讨了含铜活性炭电极的电容产生机理.结果表明,活性炭电极中含有适量的铜可与活性炭产生协同效应,表现出较好的功率特性、容量特性和较小的阻抗;添加硝酸铜20%(以铜计)的活性炭具有大电流放电的特性;添加硝酸铜40%(以铜计)的活性炭比容量可达92.5F/g,是无铜活性炭比电容量的2.35倍.
Various activated carbons were prepared without additives and in the presence of Cucontaining compounds from bituminous coal. Then the electrodes prepared from copper oxide, activated carbon and copper-containing activated carbons, respectively, were characterized by cyclic voltammetry, alternative current （AC） impedance and charge-discharge at constant current, and the mechanism of copper-doped activated carbon electrode was discussed as well. The results show that the proper content of copper in activated carbon will positively influence the electrochemical performances of electrodes, which carry out greater power, higher capacity and lower impedance. The activated carbon containing 20% copper can be discharged in big current, and the specific capacitance of activated carbon containing 40% copper can reach 92.5 F/g, which is 2.35 times of that of the activated carbon without copper prepared under the same condition.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2007年第6期811-816,共6页
Journal of China University of Mining & Technology
基金
高等学校博士学科点专项科研基金项目(20060290006)
关键词
硝酸铜
活性炭
电极
电化学性能
copper nitric
activated carbon
electrode
electrochemical performance
