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The Capacitive Behavior of Ni0.76Co0.24Ox Xerogels in KOH Solution

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Abstract:

Ni0.76Co0.24Ox xerogels were formed by the sol-gel method followed by heat-treatment in air. The structure and properties of these materials were characterized by using X-ray diffraction, TEM and N2 (77K) adsorption. Electrodes with the xerogels were activated by cyclic voltammetry (CV) and their capacitive performance was evaluated by galvanostatic technique in 7 mol/L KOH solutions. A maximum specific capacitance of 904 F/g was obtained by constant current discharge with a current density of 2.0 mA/cm2 for the Ni0.76Co0.24Ox xerogels heat-treated at 250°C. High performance obtained indicates that these materials are promising electrode materials for supercapacitors.

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Info:

Periodical:

Advanced Materials Research (Volumes 608-609)

Pages:

1092-1096

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.608-609.1092

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Online since:

December 2012

Authors:

Jie Cheng, Xin Jin Tian, Yue Hua Wen, Yan Xu, Han Min Liu, Gao Ping Cao, Yu Sheng Yang

Keywords:

Cyclic Voltammetry (CV), Galvanostatic Technique, Ni0.76Co0.24Ox Xerogels, Super-Capacitor (SC)

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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