摘要
用高导电性、高比表面积的工业炭黑(BET表面积为1080m2/g)作为超级电容器的电极材料。利用循环伏安法研究了不同扫描速度对电极电容特性的影响以及不同循环次数对循环伏安曲线的影响,用不同大小电流恒流充放电研究其充放电性能。结果表明:循环伏安曲线为矩形特征,炭黑电极表现出典型的电容行为,扫描速度与比电容基本无关;恒流充放电的电压和时间关系为线性关系,电极的大电流充放电性能良好,电极的循环寿命高。
Industrial carbon black (CB) with high specific surface area and excellent electrical conductivity was used as electrode material for supercapacitor. Effect of different scan rate on specific capacitance of CB electrode and effect of different cycle on CB electrode life were investigated by cyclic voltammetry (CV). The electrochemical properties of CB electrode were also studied by constant current charge/discharge. It was showed that the rectangular CV curves and linear potential-time curves exhibited typical capacitive behavior of CB electrode. The specific capacitance was nearly irrelevant to the scan rate. The CB electrode also showed high power characteristics and excellent cyclic life.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2005年第2期304-306,310,共4页
Journal of Functional Materials
关键词
超级电容器
炭黑
等效串联电阻
比容量
Capacitance
Capacitors
Cyclic voltammetry
Electric properties
Electrochemical electrodes
Electrochemistry
Scanning electron microscopy
Transmission electron microscopy
X ray diffraction analysis
