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Fabrication of functionalized nitrogen-doped graphene for supercapacitor electrodes

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Abstract

A unique and convenient one-step hydrothermal process for synthesizing functionalized nitrogen-doped graphene (FGN) via ethylenediamine, hydroquinone, and graphene oxide (GO) is described. The graphene sheets of FGN provide a large surface area for hydroquinone molecules to be anchored on, which can greatly enhance the contribution of pseudocapacitance. X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Raman spectroscopy, and electrochemical workstation are used to characterize the materials. The nitrogen content exhibited in FGN can be up to 9.83 at.%, and the as-produced graphene material shows an impressive specific capacitance of 364.6 F g−1 at a scan rate of 10 mV s−1, almost triple that of the graphene (GN)-based one (127.5 F g−1). Furthermore, the FGN electrodes show excellent electrochemical cycle stability with 94.4 % of its initial capacitance retained after 500 charge/discharge cycles at the current density of 3 A g−1.

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Acknowledgments

The authors gratefully acknowledge financial support from the Hefei University of Technology, school-enterprise cooperation projects production (106–433168) of China.

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Authors and Affiliations

  1. Anhui Key Laboratory of Controllable Chemistry Reaction & Material Chemical Engineering, Hefei University of Technology, Hefei, 230009, Anhui, People’s Republic of China

    Chunnian Chen, Wei Fan, Ting Ma & Xuwang Fu

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  1. Chunnian Chen
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  2. Wei Fan
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  3. Ting Ma
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  4. Xuwang Fu
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Correspondence to Chunnian Chen.

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Chen, C., Fan, W., Ma, T. et al. Fabrication of functionalized nitrogen-doped graphene for supercapacitor electrodes. Ionics 20, 1489–1494 (2014). https://doi.org/10.1007/s11581-014-1231-z

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  • DOI: https://doi.org/10.1007/s11581-014-1231-z

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