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Electrochemical performance of polypyrrole nanorods/functionalized graphene composites for supercapacitors

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Abstract

Polypyrrole (PPy) hybrid composites are prepared with nitrogen-functionalized graphene (NFG) via in situ polymerization of pyrrole in the presence of NFG suspension (PPy/NFG). PPy nanorods with 60 nm in diameter are uniformly dispersed on the surface of NFG sheets. The PPy/NFG composites are used as supercapacitor electrodes, and the electrochemical performances are evaluated by cyclic voltammetry, galvanostatic charge/discharge measurement, and electrochemical impedance spectroscopy, respectively. The PPy/NFG composite exhibits good capacitive behavior with specific capacitances of 962 and 815 F g−1 at a current density of 0.5 and 8 A g−1, respectively. The PPy/NFG symmetric supercapacitor device also presents high specific capacitance, good cycle stability, and large energy density of 57.8 Wh kg−1 at power density of 14.9 kW kg−1. The results demonstrate the PPy/NFG composites can be used as promising supercapacitor electrode materials for high performance energy storage devices.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (51402185), the Natural Science Foundation of Shanghai (13ZR1454700), the Major Program of the National Natural Science Foundation of China (51590902), and the key subject of Shanghai Polytechnic University (Material Science and Engineering, XXKZD1601).

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Authors and Affiliations

  1. School of Environmental and Materials Engineering, College of Engineering, Shanghai Polytechnic University, Shanghai, 201209, People’s Republic of China

    Jing Li, Yang Zhang, Huaqing Xie, Yang Li & Cheng Zhen

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  1. Jing Li
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  2. Yang Zhang
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  3. Huaqing Xie
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  4. Yang Li
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  5. Cheng Zhen
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Correspondence to Huaqing Xie.

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Li, J., Zhang, Y., Xie, H. et al. Electrochemical performance of polypyrrole nanorods/functionalized graphene composites for supercapacitors. J Solid State Electrochem 21, 2201–2208 (2017). https://doi.org/10.1007/s10008-017-3546-y

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