Capacitive characteristics of Ni–Co oxide nano-composite via coordination homogeneous co-precipitation method

A series of Ni–Co oxide nano-composites were prepared by thermal decomposition of the precursors obtained via coordination homogeneous co-precipitation method. Thermogravimetric analysis (TGA), powder X-ray diffraction (XRD), and transition electron microscopy (TEM) tests were applied to investigate...

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Bibliographic Details
Published in:Journal of materials science 2009-06, Vol.44 (11), p.2828-2835
Main Authors: Deng, Jing-Jing, Deng, Jian-Cheng, Liu, Zi-Ling, Deng, Hui-Ren, Liu, Bo
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Cobalt
Coordination
Coprecipitation
Crystallography and Scattering Methods
Electrochemical analysis
Electrodes
Materials Science
Morphology
Nanocomposites
Oxidation
Polymer Sciences
Solid Mechanics
Thermal decomposition
Thermodynamic properties
Thermogravimetric analysis
X ray powder diffraction
X-ray diffraction
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Summary:A series of Ni–Co oxide nano-composites were prepared by thermal decomposition of the precursors obtained via coordination homogeneous co-precipitation method. Thermogravimetric analysis (TGA), powder X-ray diffraction (XRD), and transition electron microscopy (TEM) tests were applied to investigate the thermal behavior, crystalline. and morphology of the Ni–Co oxide composites. The electrochemical properties of Ni–Co oxide electrodes were evaluated by cyclic voltammetry, galvanostatic charge–discharge, and electrochemical impedance measurements. Results showed that the calcination temperature had great effect on morphology and specific capacitance of product. The effect of the molar ratios of Ni 2+ /Co 2+ in the reaction system on the electrochemical properties of Ni–Co oxide electrodes was also discussed.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-009-3373-3