期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 137, 期 2, 页码 576-579出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2012.10.004
关键词
Composite materials; Precipitation; Electrochemical properties
资金
- State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials [11zxfk26]
- Foundation from the Technology R&D Program of Sichuan Province [2010GZ0300]
- Postgraduate Innovation Fund
- Southwest University of Science and Technology [10ycjj15]
A new kind of Co2SnO4-based electrode materials for supercapacitor was synthesized by co-precipitation method. The microstructure and surface morphology of Co2SnO4 were characterized by X-ray diffraction and scanning electron microscopy, respectively. Cyclic voltammetry, chronopotentiometry and electrochemical impedance spectroscopy were employed for the determination of specific capacitance and the equivalent series resistance of Co(2)Sna(4)/activated carbon composite electrode in KCl solution. It was shown that the composite electrode with 25 wt% Co(2)Sna(4) had excellent specific capacitance up to 285.3 F g(-1) at the current density of 5 rnA cm(-2). In addition, the composite electrode exhibited excellent long-term stability and, after 1000 cycles, 70.6% of initial capacitance was retained. Regarding the low cost, easy preparation, steady performance and environment friendliness, Co2SnO4/activated carbon composite electrode could have potentially promising application for supercapacitor. (C) 2012 Elsevier B.V. All rights reserved.
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