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Nickel oxide/expanded graphite nanocomposite electrodes for supercapacitor application

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Abstract

Nickel oxide/expanded graphite (NiO/EG) nanocomposites with different loading of EG were prepared through chemically depositing Ni(OH)2 in EG followed by thermal annealing and characterized by scanning electron microscopy (SEM), powder X-ray diffraction (XRD), Brunauer–Emmet–Teller (BET) isotherm and electrochemical measurements. The prepared NiO/EG composites were found to be crystalline and highly porous with high specific surface area and pore volume. SEM analysis reveals uniform porous morphology for NiO in the NiO/EG-60 nanocomposites which shows good specific capacitance (510 F g−1) at a current density of 100 mA g−1 in 6 mol L−1 KOH measured by chronopotentiometry employing a three-electrode system. The specific capacitance retention of the NiO/EG-60 nanocomposites was found to be ca. 95% after 500 continuous galvanostatic charge–discharge cycles, indicating that the NiO/EG nanocomposites can become promising electro-active materials for supercapacitor application.

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Acknowledgments

The authors gratefully acknowledge financial support from the National Science Foundation of China (21003015 and 21103014), the Science Foundation of Jiangsu Province (BE201113 and 2011Z0062), the Science Foundation of Changzhou (CJ20115020), and the Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions.

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Authors and Affiliations

  1. Changzhou University, Changzhou, 213164, People’s Republic of China

    Juan Xu, Xiaofang Gu, Jianyu Cao, Wenchang Wang & Zhidong Chen

  2. Jiangsu Sola Materials and Technology Key Laboratory, Changzhou, 213164, People’s Republic of China

    Juan Xu & Zhidong Chen

Authors
  1. Juan Xu
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  2. Xiaofang Gu
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  3. Jianyu Cao
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  4. Wenchang Wang
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  5. Zhidong Chen
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Correspondence to Zhidong Chen.

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Xu, J., Gu, X., Cao, J. et al. Nickel oxide/expanded graphite nanocomposite electrodes for supercapacitor application. J Solid State Electrochem 16, 2667–2674 (2012). https://doi.org/10.1007/s10008-012-1689-4

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  • DOI: https://doi.org/10.1007/s10008-012-1689-4

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