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    Sulfur-doped nanoporous carbon spheres with ultrahigh specific surface area and high electrochemical activity for supercapacitor

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    Authors
    Liu, S.
    Cai, Y.
    Zhao, X.
    Liang, Y.
    Zheng, M.
    Hu, H.
    Dong, H.
    Jiang, San Ping
    Liu, Y.
    Xiao, Yong
    Date
    2017
    Type
    Journal Article
    
    Metadata
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    Citation
    Liu, S. and Cai, Y. and Zhao, X. and Liang, Y. and Zheng, M. and Hu, H. and Dong, H. et al. 2017. Sulfur-doped nanoporous carbon spheres with ultrahigh specific surface area and high electrochemical activity for supercapacitor. Journal of Power Sources. 360: pp. 373-382.
    Source Title
    Journal of Power Sources
    DOI
    10.1016/j.jpowsour.2017.06.029
    ISSN
    0378-7753
    School
    Fuels and Energy Technology Institute
    URI
    http://hdl.handle.net/20.500.11937/66185
    Collection
    • Curtin Research Publications
    Abstract

    © 2017 Development of facile and scalable synthesis process for the fabrication of nanoporous carbon materials with large specific surface areas, well-defined nanostructure, and high electrochemical activity is critical for the high performance energy storage applications. The key issue is the dedicated balance between the ultrahigh surface area and highly porous but interconnected nanostructure. Here, we demonstrate the fabrication of new sulfur doped nanoporous carbon sphere (S-NCS) with the ultrahigh surface area up to 3357 m 2 g -1 via a high-temperature hydrothermal carbonization and subsequent KOH activation process. The as-prepared S-NCS which integrates the advantages of ultrahigh porous structure, well-defined nanospherical and modification of heteroatom displays excellent electrochemical performance. The best performance is obtained on S-NCS prepared by the hydrothermal carbonization of sublimed sulfur and glucose, S-NCS-4, reaching a high specific capacitance (405 F g -1 at a current density of 0.5 A g -1 ) and outstanding cycle stability. Moreover, the symmetric supercapacitor is assembled by S-NCS-4 displays a superior energy density of 53.5 Wh kg -1 at the power density of 74.2 W kg -1 in 1.0 M LiPF 6 EC/DEC. The synthesis method is simple and scalable, providing a new route to prepare highly porous and heteroatom-doped nanoporous carbon spheres for high performance energy storage applications.

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