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Acta Physico-Chimica Sinica  2011, Vol. 27 Issue (03): 615-619    DOI: 10.3866/PKU.WHXB20110317
Supercapacitance of NiCo2O4 Nanowire Arrays Grown on Nickel Foam
YU Li-Qiu, CHEN Shu-Li, CHANG Sha, LI Yun-Hu, GAO Yin-Yi, WANG Gui-Ling, CAO Dian-Xue
College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, P. R. China
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We prepared an electrode consisting of NiCo2O4 nanowire arrays that stand freely on nickel foam by a template-free growth method. Its morphology was determined by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The phase structure of the nanowires was analyzed by X-ray diffraction (XRD). The supercapacitance of the electrode was investigated by cyclic voltammetry, galvanostatic charge-discharge testing, and electrochemical impedance spectroscopy. The results showed that the nanowires were nearly vertical grow on and densely cover the nickel foam substrate. The nanowires have diameters around 500-1000 nm and lengths up to around 10 μm. The NiCo2O4 nanowire arrays have a specific capacitance of 741 F·g-1 and this value is 655 F·g-1 after 420 charge-discharge cycles. Electrochemical impedance spectroscopy measurements showed that the charge transfer resistance was only 0.33 Ω and this increased by only 0.06 Ω after 420 cycles.

Key wordsNiCo2O4      Nanowire array      Template-free growth method      Nickel foam      Surpercapacitor     
Received: 15 October 2010      Published: 28 January 2011
MSC2000:  O646  

The project was supported by the National Natural Science Foundation of China (20973048) and Fundamental Research Funds for the Central Universities, China (HEUCF101004).

Corresponding Authors: CAO Dian-Xue     E-mail:
Cite this article:

YU Li-Qiu, CHEN Shu-Li, CHANG Sha, LI Yun-Hu, GAO Yin-Yi, WANG Gui-Ling CAO Dian-Xue. Supercapacitance of NiCo2O4 Nanowire Arrays Grown on Nickel Foam. Acta Physico-Chimica Sinica, 2011, 27(03): 615-619.

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