Back to Search
Start Over
Preparation and supercapacitance of CuO nanosheet arrays grown on nickel foam
- Source :
- Journal of Power Sources. 196:5756-5760
- Publication Year :
- 2011
- Publisher :
- Elsevier BV, 2011.
-
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 5 μm in thickness on nickel foam skeleton. The film is composed of clusters of arrays of nanosheets with a thickness up to around 150 nm. The CuO nanosheet arrays exhibit a specific capacitance of 569 F g−1 at a current density of 5 mA cm−2 in 6.0 mol dm−3 KOH electrolyte. The capacitance loss is less than 17.5% after 500 charge/discharge cycles at 10 mA cm−2 and with columbic efficiency higher than 93%.
- Subjects :
- Materials science
Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
chemistry.chemical_element
Nanotechnology
Electrolyte
Capacitance
Dielectric spectroscopy
Nickel
Chemical engineering
chemistry
Transmission electron microscopy
Electrical and Electronic Engineering
Physical and Theoretical Chemistry
Cyclic voltammetry
Current density
Nanosheet
Subjects
Details
- ISSN :
- 03787753
- Volume :
- 196
- Database :
- OpenAIRE
- Journal :
- Journal of Power Sources
- Accession number :
- edsair.doi...........679238797ad9b1c39d7a0627ea0e29d1
- Full Text :
- https://doi.org/10.1016/j.jpowsour.2011.02.049