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Issue 6, 2017
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Tailored Li2S–P2S5 glass-ceramic electrolyte by MoS2 doping, possessing high ionic conductivity for all-solid-state lithium-sulfur batteries

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Abstract

Tailored synthesis of high-quality solid electrolytes is critical for the development of advanced all-solid-state batteries. Currently, the performance of solid electrolytes is still hindered by low ionic conductivity and poor electrochemical stability. Herein, we report a novel high-quality MoS2-doped Li2S–P2S5 glass-ceramic electrolyte (Li7P2.9S10.85Mo0.01) prepared by a facile combined method of high-energy ball milling plus annealing. Impressively, the obtained Li7P2.9S10.85Mo0.01 exhibits a high ionic conductivity of 4.8 mS cm−1 at room temperature, and a stable wide electrochemical window up to 5 V (vs. Li/Li+). The MoS2-doped electrolyte is demonstrated to have more stability on the lithium metal as compared to the Li7P3S11 counterpart. In addition, all-solid-state Li-S cells are assembled based on the Li7P2.9S10.85Mo0.01 electrolyte and show a high discharge capacity of 1020 mA h g−1, better than that of a cell based on a Li7P3S11 electrolyte. Our study provides a new type of solid electrolyte for the construction of high-performance all-solid-state Li-S batteries.

Graphical abstract: Tailored Li2S–P2S5 glass-ceramic electrolyte by MoS2 doping, possessing high ionic conductivity for all-solid-state lithium-sulfur batteries

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Publication details

The article was received on 24 Nov 2016, accepted on 23 Dec 2016 and first published on 23 Dec 2016


Article type: Paper
DOI: 10.1039/C6TA10142A
J. Mater. Chem. A, 2017,5, 2829-2834

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    Tailored Li2S–P2S5 glass-ceramic electrolyte by MoS2 doping, possessing high ionic conductivity for all-solid-state lithium-sulfur batteries

    R. Xu, X. Xia, X. Wang, Y. Xia and J. Tu, J. Mater. Chem. A, 2017, 5, 2829
    DOI: 10.1039/C6TA10142A

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