Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume 673, Issue -, Pages 43-47Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2012.03.019
Keywords
Oxides; Nanostructures; Chemical synthesis; Electrochemical properties
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Funding
- National Dong Hwa University
- National Science Council of the Republic of China, Taiwan
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The hierarchical structure of flower-like CuO standing on Cu(OH)(2) nanowire arrays was directly fabricated on the surface of copper foil via a simple and cost-effective liquid-solid reaction. The morphology and structure of lotus-like CuO/Cu(OH)(2) hierarchical arrays were examined by scanning electron microscopy and X-ray diffraction spectroscopy. Under varying polarization cut-offs and scan rates, cyclic voltammetry curves display the lotus-like CuO/Cu(OH)(2) array electrode with highly reversible features and good rate abilities, respectively. Significantly, this lotus-like CuO/Cu(OH)(2) array electrode exhibited the excellent specific capacitance of 278 Fg(-1), which corresponds to the energy density of 23.3 Wh kg(-1) by use of galvanostatic charge/discharge test at a current density of 2 mA cm(-2). Capacitance loss of 15% over 5000 cycles further indicates suitability of the cupric complex oxide as a potential electrode material for supercapacitors. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.
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