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Issue 11, 2012
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Facile synthesis of a interleaved expanded graphite-embedded sulphur nanocomposite as cathode of Li–S batteries with excellent lithium storage performance

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Abstract

This paper reports the facile synthesis of a unique interleaved expanded graphite-embedded sulphur nanocomposite (S-EG) by melt-diffusion strategy. The SEM images of the S-EG materials indicate the nanocomposites consist of nanosheets with a layer-by-layer structure. Electrochemical tests reveal that the nanocomposite with a sulphur content of 60% (0.6S-EG) can deliver the highest discharge capacity of 1210.4 mAh g−1 at a charge–discharge rate of 280 mA g−1 in the first cycle, the discharge capacity of the 0.6S-EG remains as high as 957.9 mAh g−1 after 50 cycles of charge–discharge. Furthermore, at a much higher charge–discharge rate of 28 A g−1, the 0.6S-EG cathode can still deliver a high reversible capacity of 337.5 mAh g−1. The high sulphur utilization, excellent rate capability and reduced over-discharge phenomenon of the 0.6S-EG material are exclusively attributed to the particular microstructure and composition of the cathode.

Graphical abstract: Facile synthesis of a interleaved expanded graphite-embedded sulphur nanocomposite as cathode of Li–S batteries with excellent lithium storage performance

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Publication details

The article was received on 06 Oct 2011, accepted on 14 Dec 2011 and first published on 30 Jan 2012


Article type: Paper
DOI: 10.1039/C2JM15041G
Citation: J. Mater. Chem., 2012,22, 4744-4750
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    Facile synthesis of a interleaved expanded graphite-embedded sulphur nanocomposite as cathode of Li–S batteries with excellent lithium storage performance

    Y. Wang, L. Huang, L. Sun, S. Xie, G. Xu, S. Chen, Y. Xu, J. Li, S. Chou, S. Dou and S. Sun, J. Mater. Chem., 2012, 22, 4744
    DOI: 10.1039/C2JM15041G

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