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Synthesis of graphene/nickel oxide composite with improved electrochemical performance in capacitors

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Abstract

A novel reduced graphene oxide/NiO nanosheet composite (r-GO/NiO) (ca. 75 % NiO in weight) was synthesized by a facile two-step method, where the NiO nanosheets were decorated with some voids. The composite was characterized by using X-ray diffraction, transmission electron microscopy, thermal gravimetric analysis, and Raman spectroscopy. The electrochemical properties of the composite were investigated by cyclic voltammetry, galvanostatic charge, and discharge measurements. The results show that the r-GO/NiO composite exhibits a stable average specific capacitance of ca. 1,139 F g−1 (at 0.5 A g−1) during 1,000 charge–discharge cycles, suggesting that the r-GO/NiO composite is a potential supercapacitor material. The main correlation between the electrochemical performance and the structure of the materials was studied, and the formation process of the composite was also discussed.

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Acknowledgments

This work was supported by 211 Project of Anhui University, the National Natural Science Foundations of China (51272002), Anhui Provincial Natural Science Foundation (1208085ME87), and Specialized Research Fund for the Doctoral Program of Higher Education (20093401110003).

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Authors and Affiliations

  1. College of Chemistry and Chemical Engineering, Anhui University, Hefei, 230039, People’s Republic of China

    Feng Gao, Qing Wei, Jiaxiang Yang & Hong Bi

  2. Key Laboratory of Environment-Friendly Polymer Materials of Anhui Province, Anhui University, Hefei, 230039, People’s Republic of China

    Feng Gao, Qing Wei, Jiaxiang Yang & Hong Bi

  3. Institute of Plasma Physic, Chinese Academy of Sciences, Hefei, 230031, People’s Republic of China

    Mingtai Wang

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  1. Feng Gao
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  2. Qing Wei
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  3. Jiaxiang Yang
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  4. Hong Bi
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  5. Mingtai Wang
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Correspondence to Hong Bi.

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Gao, F., Wei, Q., Yang, J. et al. Synthesis of graphene/nickel oxide composite with improved electrochemical performance in capacitors. Ionics 19, 1883–1889 (2013). https://doi.org/10.1007/s11581-013-0939-5

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  • DOI: https://doi.org/10.1007/s11581-013-0939-5

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