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Issue 12, 2011
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Single-crystalline Ni(OH)2 and NiO nanoplatelet arrays as supercapacitor electrodes†

Jiangtian Li,‡ab   Wei Zhao,‡a   Fuqiang Huang,*a   Ayyakkannu Manivannanc  and  Nianqiang Wu*b  
Author affiliations

* Corresponding authors

a CAS key lab for energy storage and conversion, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai, P. R. China
E-mail: huangfq@mail.sic.ac.cn
Fax: +86 21 5241 6360
Tel: +86 21 5241 1620

b Department of Mechanical and Aerospace Engineering, West Virginia University, Morgantown, WV, USA
E-mail: nick.wu@mail.wvu.edu
Fax: +1 304 293 6689
Tel: +1 304 293 3326

c National Energy Technology Laboratory, U.S. Department of Energy, Morgantown, WV, USA

Abstract

Vertically aligned Ni(OH)2 and NiO single-crystalline nanoplatelet arrays were directly grown on the fluorine-doped tin oxide (FTO) substrate by a simple hydrothermal method. The effects of the hydrothermal parameters on the morphology and crystal structure of the nanoarray film were investigated. Controlling the ammonia and persulfate concentrations was the key to controlling the morphology of the nanoarray film. The experimental results showed that the single-crystalline NiO nanoplatelet array was a promising candidate for the supercapacitor electrode. It exhibited a high specific capacitance, prompt charge/discharge rate, and good stability of cycling performance. It is believed that the vertically oriented aligned single-crystalline NiO nanoplatelet array is beneficial to the charge transfer in the electrode and to the ion transport in the solution during redox reaction.

Graphical abstract: Single-crystalline Ni(OH)2 and NiO nanoplatelet arrays as supercapacitor electrodes

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Supplementary files

Article information

https://doi.org/10.1039/C1NR10802F
Submitted
12 Jul 2011
Accepted
05 Sep 2011
First published
07 Oct 2011
Nanoscale, 2011,3, 5103-5109
Article type
Paper
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Single-crystalline Ni(OH)2 and NiO nanoplatelet arrays as supercapacitor electrodes

J. Li, W. Zhao, F. Huang, A. Manivannan and N. Wu, Nanoscale, 2011, 3, 5103
DOI: 10.1039/C1NR10802F

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