期刊
NANOSCALE RESEARCH LETTERS
卷 9, 期 -, 页码 -出版社
SPRINGER
DOI: 10.1186/1556-276X-9-424
关键词
NiO nanosheets; Hydrothermal approach; Long cycle life; Flexible supercapacitors
资金
- National Natural Science Foundation of China [U1304108, U1204501, 11272274]
- Science and Technology Key Projects of Education Department Henan Province [13A430758]
- Natural Scientific Foundation of Hunan Province [13JJ4080]
- Young Backbone Teacher of Xinyang Normal University [2013GGJS-18]
- Innovative Research Team (in Science and Technology) in the University of Henan Province [13IRTSTHN018]
Well-aligned nickel oxide (NiO) nanosheets with the thickness of a few nanometers supported on a flexible substrate (Ni foam) have been fabricated by a hydrothermal approach together with a post-annealing treatment. The three-dimensional NiO nanosheets were further used as electrode materials to fabricate supercapacitors, with high specific capacitance of 943.5, 791.2, 613.5, 480, and 457.5 F g(-1) at current densities of 5, 10, 15, 20, and 25 A g(-1), respectively. The NiO nanosheets combined well with the substrate. When the electrode material was bended, it can still retain 91.1% of the initial capacitance after 1,200 charging/discharging cycles. Compared with Co3O4 and NiO nanostructures, the specific capacitance of NiO nanosheets is much better. These characteristics suggest that NiO nanosheet electrodes are promising for energy storage application with high power demands.
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