1. Influence of Ag doped CuO nanosheet arrays on electrochemical behaviors for supercapacitors
- Author
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Huang, Jichun, Wu, Hongbin, Cao, Dianxue, and Wang, Guiling
- Subjects
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SILVER , *COPPER oxide , *DOPED semiconductors , *ELECTROCHEMICAL analysis , *SUPERCAPACITORS , *ELECTRODES , *CHEMICAL templates - Abstract
Abstract: The electrode of array of CuO nanosheet is prepared via a template-free growth method, and it is doped by Ag via the silver mirror reaction. The morphology of Ag-doped CuO nanosheet is examined by scanning electron microscopy. The phase structure of the Ag-doped CuO nanosheet is analyzed by X-ray diffraction spectroscopy. The supercapacitance behavior of Ag-doped CuO nanosheet is investigated by cyclic voltammetry, galvanostatic charge/discharge test and electrochemical impedance spectroscopy. The results show that the thickness of a single nanosheet is up to around 150nm. The specific capacitance of the Ag-doped CuO nanosheet electrode is 689Fg−1 at 1Ag−1 and 299Fg−1 at 10Ag−1, respectively, much higher than that of the unmodified CuO nanosheet arrays (418Fg−1 at 1Ag−1 and 127Fg−1 at 10Ag−1). The improved capacitance is explained in terms of the presence of dispersed Ag particle coated the CuO nanosheet arrays having good electrical conductivity. [Copyright &y& Elsevier]
- Published
- 2012
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