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Issue 4, 2017
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Carbon-coated core–shell Li2S@C nanocomposites as high performance cathode materials for lithium–sulfur batteries

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Abstract

Li2S has made the concept of Li–S batteries much more promising due to the relatively high storage capacity, the possibility of using Li-free anodes and the increase of microstructural stability. However, similar to S, Li2S also suffers from an insulating nature and polysulfide dissolution problem. The results presented here show a facile and cost-effective approach by using a plasma sparking and chemical sulfurization process to synthesize core–shell Li2S@C nanocomposites. The nanocomposites show a significantly reduced particle size and well-developed core–shell architecture, effectively shortening the Li-ion diffusion distance, enhancing the electronic conductivity and suppressing the dissolution losses of polysulfides. As a result, a much improved rate and cycling performance has been achieved. The method presented in this study offers good opportunities for scaling up the production of high performance cathode materials in a simple and low-cost way to be applied in future generation Li–S batteries.

Graphical abstract: Carbon-coated core–shell Li2S@C nanocomposites as high performance cathode materials for lithium–sulfur batteries

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Publication details

The article was received on 21 Oct 2016, accepted on 12 Dec 2016 and first published on 13 Dec 2016


Article type: Communication
DOI: 10.1039/C6TA09146F
J. Mater. Chem. A, 2017,5, 1428-1433

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    Carbon-coated core–shell Li2S@C nanocomposites as high performance cathode materials for lithium–sulfur batteries

    C. Chen, D. Li, L. Gao, P. P. R. M. L. Harks, Rüdiger-A. Eichel and P. H. L. Notten, J. Mater. Chem. A, 2017, 5, 1428
    DOI: 10.1039/C6TA09146F

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