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Issue 26, 2012
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Controllable synthesis of porous nickel–cobalt oxide nanosheets for supercapacitors

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Abstract

Vertically aligned nickel–cobalt oxide (NCO) nanosheets with porous structure were successfully synthesized on FTO substrates by a simple electrochemical method without any templates. Cyclic voltammetry (CV) and galvanostatic charge/discharge measurements show that the porous NCO nanosheets have an ideal capacitive performance and long-term stability. With an optimum amount of Ni, the specific capacitance for the NCOs could reach as high as 453 F g−1 at a scan rate of 5 mV s−1 and 506 F g−1 at a current density of 1 A g−1, showing an improvement of around 50% compared with cobalt oxide. Furthermore, a symmetric supercapacitor based on two NCO electrodes exhibits a maximum specific capacitance of 89.2 F g−1 at 0.17 A g−1.

Graphical abstract: Controllable synthesis of porous nickel–cobalt oxide nanosheets for supercapacitors

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Supplementary files

Article information


Submitted
15 Feb 2012
Accepted
15 Apr 2012
First published
24 Apr 2012

J. Mater. Chem., 2012,22, 13357-13364
Article type
Paper

Controllable synthesis of porous nickel–cobalt oxide nanosheets for supercapacitors

X. Lu, X. Huang, S. Xie, T. Zhai, C. Wang, P. Zhang, M. Yu, W. Li, C. Liang and Y. Tong, J. Mater. Chem., 2012, 22, 13357
DOI: 10.1039/C2JM30927K

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