Electrochemical Capacitance of Ni Foam Supported Co(OH)2 Nanowires

doi:10.6023/A1110012

Acta Chimica Sinica ›› 2012, Vol. 70 ›› Issue (04): 372-376.DOI: 10.6023/A1110012 Previous Articles Next Articles

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泡沫镍载Co(OH)₂ 纳米线的电化学电容性能

徐暘^a,b, 刘新伟^a, 翟婧如^a, 陈书礼^a, 曹殿学^a, 王贵领^a

a 哈尔滨工程大学材料科学与化学工程学院哈尔滨 150001;
b 黑龙江中医药大学药学院哈尔滨 150040

投稿日期:2011-10-09 修回日期:2011-11-03 发布日期:2011-11-09
通讯作者: 王贵领
基金资助:
国家自然科学基金(No. 20973048)资助项目.

Electrochemical Capacitance of Ni Foam Supported Co(OH)₂ Nanowires

Xu Yang^a,b, Liu Xinwei^a, Zhai Jingru^a, Chen Shuli^a, Cao Dianxue^a, Wang Guiling^a

a College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001;
b College of Pharmacy, Heilongjiang University of Traditional Chinese Medicine, Harbin 150040

Received:2011-10-09 Revised:2011-11-03 Published:2011-11-09
Supported by:
Project was supported by the National Natural Science Foundation of China (No. 20973048).

The electrode of Co(OH)₂ nanowires freely standing on nickel foam was prepared via template- free growth method. Its morphology was examined by scanning electron microscopy (SEM) and transmission electron microscope (TEM), the phase structure of Co(OH)₂ was analyzed by X-ray diffraction spectroscopy (XRD), and the electrochemical capacitance of the electrode was investigated by cyclic voltammetry, galvanostatic charge-discharge test and electrochemical impedance spectroscopy. The results show that Co(OH)₂ nanowires grow on and densely cover the nickel foam substrate. The Co(OH)₂ nanowires have diameters around 300 nm and lengths up to around 8～10 μm. The Co(OH)₂ nanowires display a specific capacitance of 677 F·g^-1 and remain to be 574 F·g^-1 after 500 charge-discharge cycles. Electrochemical impedance spectroscopy measurement shows that the charge transfer resistance is only 0.23 Ω and increased only by 0.03 Ω after 500 cycles.

Key words: template-free growth method, Co(OH)₂ nanowire, nickel foam, morphology, electrochemical capacitor

Cite this article

Xu Yang, Liu Xinwei, Zhai Jingru, Chen Shuli, Cao Dianxue, Wang Guiling. Electrochemical Capacitance of Ni Foam Supported Co(OH)₂ Nanowires[J]. Acta Chimica Sinica, 2012, 70(04): 372-376.

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泡沫镍载Co(OH)₂ 纳米线的电化学电容性能

Electrochemical Capacitance of Ni Foam Supported Co(OH)₂ Nanowires

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泡沫镍载Co(OH)2 纳米线的电化学电容性能