3D ordered NiO/silicon MCP array electrode materials for electrochemical supercapacitors

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• 作者：Fengjuan Miao ; Bairui Tao ; Pengliang Ci ; Jing Shi ; Lianwei Wang ; Paul K. Chu
• 关键词：A. Semiconductor ; B. Chemical synthesis ; D. Electrochemical properties
• 刊名：Materials Research Bulletin
• 出版年：2009
• 出版时间：September 2009
• 年：2009
• 卷：44
• 期：9
• 页码：1920-1925
• 全文大小：540 K

文摘

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.