Tailored Li2S-P2S5 glass-ceramic electrolyte by MoS2 doping, possessing high ionic conductivity for all-solid-state lithium-sulfur batteries
Tailored Li2S-P2S5 glass-ceramic electrolyte by MoS2 doping, possessing high ionic conductivity for all-solid-state lithium-sulfur batteries
复制标题
MoS2掺杂定制的Li2S-P2S5微晶玻璃电解质，具有高离子电导率，适用于全固态锂硫电池
DOI：
10.1039/c6ta10142a
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发表时间：
2017
影响因子：
11.9
通讯作者：
Tu Jiang-ping
中科院分区：
文献类型：
--
作者：
Xu Ruo-chen;Xia Xin-hui;Wang Xiu-li;Xia Yan;Tu Jiang-ping
高质量固体电解质的定制合成对于开发先进的全固态电池至关重要。目前，固体电解质的性能仍然受到低离子电导率和差的电化学稳定性的阻碍。在此，我们报道了一种新型高质量MoS 2掺杂Li2S-P2S5玻璃陶瓷电解质（www.example.com），该电解质通过高能球磨加退火的简单组合方法制备。令人印象深刻的是，所获得的www.example.com在室温下表现出4.8mS cm-1的高离子电导率，以及高达5V（相对于Li/Li+）的稳定的宽电化学窗口。与Li7P3S11对应物相比，MoS2掺杂的电解质被证明对锂金属具有更高的稳定性。此外，基于www.example.com电解质组装的全固态Li-S电池表现出1020 mA h g − 1的高放电容量，优于基于Li7P3S11电解质的电池。本研究为高性能全固态锂硫电池的构建提供了一种新型的固体电解质。
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.