摘要
以普通活性炭为基材,用Co(NO_3)_2溶液浸渍和高温热解法制备改性炭材料。采用循环伏安、恒流充放电、漏电流测试等电化学方法研究了由改性炭电极构成的电化学电容器的性能。结果显示虽然改性炭的比表面积比原炭有所下降,但是比电容却显著增加,从130.1F/g增加到198.8 F/g,提高了52.8%;其相应的体积比电容高达136.9 F/cm^3。
Commercial activated carbon （AC） was soaked in Co （NO3 ）2 solution and pyrolysed to prepare modified carbon as electrode material for electrochemical capacitor. The performance of the resultant coin-type capacitors was investigated by cyclic vohammetry, constant current and leakage current test. The results show that the specific surface area of the modified charge/discharge carbon decreased slightly, but the specific capacitance increased remarkably to 198.8 F/g, 52.8% higher than that of original carbon. The corresponding volumetric capacitance is 136.9F/cm^3.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2007年第4期653-657,764,共6页
Bulletin of the Chinese Ceramic Society
基金
国家自然科学基金(50472089)
关键词
活性炭
电化学电容器
准电容效应
氧化钴
炭电极
activated carbon
electrochemical capacitor
pseudo-capacitance
cobalt oxide
carbon electrode
