Journal
MATERIALS RESEARCH BULLETIN
Volume 44, Issue 9, Pages 1920-1925Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2009.05.004
Keywords
Semiconductor; Chemical synthesis; Electrochemical properties
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Funding
- Shanghai Key Fundamental Project [08JC1408900]
- Hong Kong Research Grants Council (RGC) General Research Fund (GRF) [CityU 112307]
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The preparation and electrochemical properties of 3D ordered nickel oxide/silicon microchannel plate (NiO/Si-MCP) array electrode materials for supercapacitors are studied. The Si-MCP fabricated by electrochemical etching is used as a 3D supporting structure for electrodes. The active NiO is synthesized by electroless plating of nickel on the surface of the Si-MCP followed by annealing under oxygen. The electrochemical properties of the NiO/Si-MCP nanocomposite electrode materials are studied using cyclic voltammetry (CV), chronopotentiometry, and electrochemical impedance spectroscopy (EIS) in a 2 M KOH solution. The results reveal typical electrochemical capacitive behavior in the potential range from -0.6 to 1.0 V. The specific capacitance of approximately 586.4 F g(-1) decreases slightly with 4.8% loss after 500 cycles. The linear and symmetrical charge/discharge curves are measured by chronopotentiometry. The NiO/Si-MCP composite is a promising electrode material for integrated supercapacitors. (C) 2009 Elsevier Ltd. All rights reserved.
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