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Solution growth of NiO nanosheets supported on Ni foam as high-performance electrodes for supercapacitors.

ABSTRACT: 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.

SUBMITTER: Yan H

PROVIDER: S-EPMC4177676 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature

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Solution growth of NiO nanosheets supported on Ni foam as high-performance electrodes for supercapacitors.

Yan Hailong H Zhang Deyang D Xu Jinyou J Lu Yang Y Liu Yunxin Y Qiu Kangwen K Zhang Yihe Y Luo Yongsong Y

Nanoscale research letters 20140822 1

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 w ...[more]

PMID: 25276099

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