Nanoflake-like cobalt hydroxide/ordered mesoporous carbon composite for electrochemical capacitors

doi:10.1007/s10008-010-1035-7

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	Nanoflake-like cobalt hydroxide/ordered mesoporous carbon composite for electrochemical capacitors
	Zhang, Jing 2; Kong, Ling-Bin 1,2; Cai, Jian-Jun 2; Luo, Yong-Chun 1; Kang, Long 1
	2010-11-01
关键词	Capacitance Carbon carbon composites Electrochemical electrodes Electrochemical impedance spectroscopy Mesoporous materials Precipitation (chemical) Scanning electron microscopy Cobalt hydroxides Electrochemical capacitor Nanoflaks Ordered mesoporous carbon Specific capacitance
卷号	14
期号	11
DOI	10.1007/s10008-010-1035-7
页码	2065-2075
英文摘要	Nanocomposites consisting of mesoporous carbon CMK-3 and cobalt hydroxide nanoflakes are synthesized by a chemical precipitation method. The successful growth of nanometer-sized Co(OH)2 flakes on the surface of CMK-3 is confirmed by scanning electron microscopy. The Co(OH)2/CMK-3 composite electrodes are investigated for its use in the electrochemical capacitors with cyclic voltammograms, chronopotentiometric measurements, and electrochemical impedance spectroscopy. Experimental studies reveal that the Co(OH)2/CMK-3 composite electrode with the 20 wt.% CMK-3 presents excellent electrochemical performance with specific capacitance of 750 F/g (or 910 F/g after being corrected for the weight percentage of the Co(OH) 2 phase). The overall improved electrochemical behavior accounts for the unique structure design in the Co(OH)2/CMK-3 composite in terms of porous nanostructure, large specific surface area, and good electrical conductance. The Co(OH)2/CMK-3 composite electrode also shows better rate capability and cyclic stability, suggesting its potential applications as the electrode materials for electrochemical capacitors. © 2010 Springer-Verlag.
会议录	Journal of Solid State Electrochemistry
会议录出版者	Springer New York LLC
语种	英语
ISSN号	14328488
WOS研究方向	Electrochemistry
WOS记录号	WOS:000281092400015
内容类型	会议论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/116439]
专题	省部共建有色金属先进加工与再利用国家重点实验室材料科学与工程学院能源与动力工程学院
作者单位	1.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China 2.State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China;
推荐引用方式 GB/T 7714	Zhang, Jing,Kong, Ling-Bin,Cai, Jian-Jun,et al. Nanoflake-like cobalt hydroxide/ordered mesoporous carbon composite for electrochemical capacitors[C]. 见:.