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Preparation and properties of Co3O4 nanorods as supercapacitor material

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Abstract

Co3O4 nanorods have been successfully synthesized by thermal decomposition of the precursor prepared via a facile and efficient microwave-assisted hydrothermal method, using cetyltrimethylammonium bromide (CTAB) with ordered chain structures as soft template for the first time. The obtained Co3O4 was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and electrochemical measurements. The results demonstrate that the as-synthesized nanorods are single crystalline with an average diameter of about 20 to 50 nm and length up to several micrometers. Preliminary electrochemical studies, including cyclic voltammetry (CV), galvanostatic charge–discharge, and electrochemical impedance spectroscopy (EIS) measurements, are carried out in 6 M KOH electrolyte. Specific capacitance of 456 F g−1 for a single electrode could be achieved even after 500 cycles, suggesting its potential application in electrochemical capacitors. This promising method could provide a universal green chemistry approach to synthesize other low-cost and environmentally friendly transition metal hydroxide or oxide.

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Acknowledgements

This study has been supported by the National Natural Science Foundation of China (No.20663006). We also thank Scientific Research Program of the Higher Education Institution of Xinjiang (XJEDU2006S206) for partial support of this study.

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Authors and Affiliations

  1. College of Chemistry and Chemical Engineering, Xinjiang University, 830046, Urumqi, People’s Republic of China

    Li Cui & Juan Li

  2. School of Science, Xi’an Jiaotong University, 710049, Xi’an, People’s Republic of China

    Juan Li

  3. College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, People’s Republic of China

    Xiao-Gang Zhang

Authors
  1. Li Cui
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  2. Juan Li
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  3. Xiao-Gang Zhang
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Correspondence to Juan Li.

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Cui, L., Li, J. & Zhang, XG. Preparation and properties of Co3O4 nanorods as supercapacitor material. J Appl Electrochem 39, 1871–1876 (2009). https://doi.org/10.1007/s10800-009-9891-5

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  • DOI: https://doi.org/10.1007/s10800-009-9891-5

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