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Construct Stable Lithium Sulfide Membrane to Greatly Confine Polysulfides for High Performance Lithium-Sulfur Batteries

Abstract

A stable lithium sulfide membrane is in situ constructed to wrap the mixed sulfur/C materials surface of lithium-sulfur batteries (LSBs) by delicately tuning galvanostatic discharge current. The membrane offers unique and selective channels allowing only ions/small sulfides passing but confine polysulfides transport through against shuttle effect, thus providing large capacity of 685 mAh g-1 at 1C and long cycling stability (0.03% capacity decay per cycle) for LSB, which are much superior to the same sulfur-loaded battery without the membrane (0.26% capacity decay per cycle over 207 cycles and 213 mAh g-1 at 1C) and also are the best among the all reported plain carbonaceous host materials-based LSBs. The mechanism responsible for such dramatically improved performance is discussed in detail. This work not only offers a facile approach to greatly improve the capacity and stability for practical applications but also offers new scientific insights in the lithium sulfur batteries.

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Publication details

The article was received on 04 Jan 2018, accepted on 12 Apr 2018 and first published on 13 Apr 2018


Article type: Paper
DOI: 10.1039/C8TA00098K
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Construct Stable Lithium Sulfide Membrane to Greatly Confine Polysulfides for High Performance Lithium-Sulfur Batteries

    C. Wu, C. Guo, J. Wu, W. Ai, T. Yu and C. M. Li, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA00098K

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