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Issue 8, 2019
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Outstanding cycle stability and rate capabilities of the all-solid-state Li–S battery with a Li7P3S11 glass-ceramic electrolyte and a core–shell S@BP2000 nanocomposite

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Abstract

All-solid-state Li–S batteries (ASSLSBs) can substantially alleviate poly-sulfide shuttling, which greatly improves the electrochemical performance of Li–S batteries. However, poor cycling and rate performances are still severe challenges for ASSLSBs and are mainly ascribed to the low ionic conductivity of the solid electrolyte and the unstable cathode/solid electrolyte interface resulting from the volume variation during the repeated charge–discharge process. In consideration of this, a Li7P3S11 glass-ceramic solid electrolyte with high ionic conductivity and a S@BP2000 nanocomposite with a core–shell structure are introduced to fabricate a novel ASSLSB in this work. As expected, the S@BP2000 cathode in the fabricated ASSLSB displays outstanding specific capacity (1391.3 mA h g−1, 0.2 C) and rate performance (678.6 mA h g−1, 4 C) and ultrahigh cycling performance (capacity retention of nearly 100% after 1200 cycles, 3 C) at room temperature. Moreover, further improved specific capacity (1597.7 mA h g−1, 0.2 C) and rate performance (1092.9 mA h g−1, 8 C) can be obtained at 80 °C, benefiting from the improved ionic conductivity at higher test temperature. The ultrahigh cycling and rate performances indicate that this strategy may provide a tremendous opportunity for constructing high-performance ASSLSBs.

Graphical abstract: Outstanding cycle stability and rate capabilities of the all-solid-state Li–S battery with a Li7P3S11 glass-ceramic electrolyte and a core–shell S@BP2000 nanocomposite

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Publication details

The article was received on 26 Dec 2018, accepted on 21 Jan 2019 and first published on 21 Jan 2019


Article type: Paper
DOI: 10.1039/C8TA12443D
J. Mater. Chem. A, 2019,7, 3895-3902

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    Outstanding cycle stability and rate capabilities of the all-solid-state Li–S battery with a Li7P3S11 glass-ceramic electrolyte and a core–shell S@BP2000 nanocomposite

    Q. Han, X. Li, X. Shi, H. Zhang, D. Song, F. Ding and L. Zhang, J. Mater. Chem. A, 2019, 7, 3895
    DOI: 10.1039/C8TA12443D

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