期刊
ELECTROCHIMICA ACTA
卷 182, 期 -, 页码 1101-1106出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2015.10.035
关键词
Supercapacitors; Electrodeposition; Co3O4 nanosheets; Specific capacitances
资金
- National Nature Science Foundation of China [61204102]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20124407120013]
- Science and Technology Program of Guangdong Province [2014B010119004, 2014B010121001, 2015A030313389, 2015B090903078, 2015A010103012]
- Science and Technology Scientific and Technological Projects of Zhongshan [2014A2FC204]
The Co3O4 nanosheets electrode have been fabricated on Ni foam by a facile synthesis process including the electrodeposition of Co(OH)(2) precursor followed by subsequent thermal transformation of precursor to Co3O4. The resulting Co3O4 nanosheets electrode exhibits an ultrahigh specific capacitance of 6469 F g(-1) at a current density of 5 mA cm(-2), exceeding their theoretical value. Moreover, at density of 15 mA cm(-2), the specific capacitance maintains 4127 F g(-1), with 81.6% retention after 2000 chargedischarge cycles. The work confirms the promising application of Co3O4 nanosheets as an efficient electrode for supercapacitors, and also offers a facile strategy to design and synthesis Co3O4 electrode with enhanced specific capacitance. (C) 2015 Elsevier Ltd. All rights reserved.
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