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Reduced graphene oxide@ sulfur nanocomposite as high capacity host matrix for advanced lithium sulfur batteries

Abstract

Nanosheets of reduced graphene oxide are promising cathode material for achieving advanced Li/S batteries with high energy density and high performance. Here, we report a simple procedure to synthesize reduced graphene oxide (RGO) conductive matrix for trapping nano sulfur particles and polysulfide intermediates that impedes sulfur from depositing onto the external surface of carbon wall. The obtained results have demonstrated high specific capacities and good cycling stability of proposed cathode. The RGO@S cathode renders discharge capacities of 1131.5, 991.45, 799.23, 765.2 and 645.76 mAh g-1 at different current rates of 0.1, 0.2, 0.5, 1 and 2 C, respectively. Also, High specific discharge capacity of about 593.2 mAh g-1 was delivered at 1 C rate after 300 cycles of charge/discharge process with reduced capacity of about 22.5%. As explained, the RGO@S structure has a high potential as cathode of next generation of lithium- sulfur batteries with high energy and power density.

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Publication details

The article was received on 10 Jan 2017, accepted on 31 Aug 2017 and first published on 31 Aug 2017


Article type: Paper
DOI: 10.1039/C7NJ00123A
Citation: New J. Chem., 2017, Accepted Manuscript
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    Reduced graphene oxide@ sulfur nanocomposite as high capacity host matrix for advanced lithium sulfur batteries

    M. R. Sovizi, M. R. Yaftian and S. T. Seyyedin, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ00123A

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