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Preparation and supercapacitance of CuO nanosheet arrays grown on nickel foam
- Source :
-
Journal of Power Sources . Jul2011, Vol. 196 Issue 13, p5756-5760. 5p. - Publication Year :
- 2011
-
Abstract
- Abstract: CuO nanosheet arrays freely standing on nickel foam are prepared via a template-free growth method. The morphology of CuO nanosheet arrays is examined by scanning and transmission electron microscopy and the phase structure of nanosheets is analyzed by X-ray diffraction spectroscopy. The supercapacitance of CuO nanosheet arrays is investigated by cyclic voltammetry, galvanostatic charge/discharge test and electrochemical impedance spectroscopy. The results show that the array of CuO nanosheets forms a uniform film of around 5μm in thickness on nickel foam skeleton. The film is composed of clusters of arrays of nanosheets with a thickness up to around 150nm. The CuO nanosheet arrays exhibit a specific capacitance of 569Fg−1 at a current density of 5mAcm−2 in 6.0moldm−3 KOH electrolyte. The capacitance loss is less than 17.5% after 500 charge/discharge cycles at 10mAcm−2 and with columbic efficiency higher than 93%. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 03787753
- Volume :
- 196
- Issue :
- 13
- Database :
- Academic Search Index
- Journal :
- Journal of Power Sources
- Publication Type :
- Academic Journal
- Accession number :
- 60159308
- Full Text :
- https://doi.org/10.1016/j.jpowsour.2011.02.049