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Issue 1, 2016
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Graphene-directed two-dimensional porous carbon frameworks for high-performance lithium–sulfur battery cathodes

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Abstract

Graphene-directed two-dimensional (2D) nitrogen-doped porous carbon frameworks (GPF) as the hosts for sulfur were constructed via the ionothermal polymerization of 1,4-dicyanobenzene directed by the polyacrylonitrile functionalized graphene nanosheets. As cathodes for lithium–sulfur (Li–S) batteries, the prepared GPF/sulfur nanocomposites exhibited a high capacity up to 962 mA h g−1 after 120 cycles at 2 A g−1. A high reversible capacity of 591 mA h g−1 was still retained even at an extremely large current density of 20 A g−1. Such impressive electrochemical performance of GPF should benefit from the 2D hierarchical porous architecture with an extremely high specific surface area, which could facilitate the efficient entrapment of sulfur and polysulfides and afford rapid charge transfer, fast electronic conduction as well as intimate contact between active materials and the electrolyte during cycling.

Graphical abstract: Graphene-directed two-dimensional porous carbon frameworks for high-performance lithium–sulfur battery cathodes

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Publication details

The article was received on 09 Oct 2015, accepted on 15 Nov 2015 and first published on 17 Nov 2015


Article type: Paper
DOI: 10.1039/C5TA08109B
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J. Mater. Chem. A, 2016,4, 314-320

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    Graphene-directed two-dimensional porous carbon frameworks for high-performance lithium–sulfur battery cathodes

    J. Shan, Y. Liu, Y. Su, P. Liu, X. Zhuang, D. Wu, F. Zhang and X. Feng, J. Mater. Chem. A, 2016, 4, 314
    DOI: 10.1039/C5TA08109B

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