A family of oxychloride amorphous solid electrolytes for long-cycling all-solid-state lithium batteries

Shumin Zhang, Feipeng Zhao, Jiatang Chen, Jiamin Fu, Jing Luo, Sandamini H. Alahakoon, Lo-Yueh Chang, Renfei Feng, Mohsen Shakouri, Jianwen Liang, Yang Zhao, Xiaona Li, Le He, Yining Huang, Tsun-Kong Sham () and Xueliang Sun ()
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Shumin Zhang: University of Western Ontario
Feipeng Zhao: University of Western Ontario
Jiatang Chen: University of Western Ontario
Jiamin Fu: University of Western Ontario
Jing Luo: University of Western Ontario
Sandamini H. Alahakoon: University of Western Ontario
Lo-Yueh Chang: National Synchrotron Radiation Research Centre
Renfei Feng: University of Saskatchewan
Mohsen Shakouri: University of Saskatchewan
Jianwen Liang: University of Western Ontario
Yang Zhao: University of Western Ontario
Xiaona Li: University of Western Ontario
Le He: Soochow University
Yining Huang: University of Western Ontario
Tsun-Kong Sham: University of Western Ontario
Xueliang Sun: University of Western Ontario

Nature Communications, 2023, vol. 14, issue 1, 1-10

Abstract: Abstract Solid electrolyte is vital to ensure all-solid-state batteries with improved safety, long cyclability, and feasibility at different temperatures. Herein, we report a new family of amorphous solid electrolytes, xLi2O-MCly (M = Ta or Hf, 0.8 ≤ x ≤ 2, y = 5 or 4). xLi2O-MCly amorphous solid electrolytes can achieve desirable ionic conductivities up to 6.6 × 10−3 S cm−1 at 25 °C, which is one of the highest values among all the reported amorphous solid electrolytes and comparable to those of the popular crystalline ones. The mixed-anion structural models of xLi2O-MCly amorphous SEs are well established and correlated to the ionic conductivities. It is found that the oxygen-jointed anion networks with abundant terminal chlorines in xLi2O-MCly amorphous solid electrolytes play an important role for the fast Li-ion conduction. More importantly, all-solid-state batteries using the amorphous solid electrolytes show excellent electrochemical performance at both 25 °C and −10 °C. Long cycle life (more than 2400 times of charging and discharging) can be achieved for all-solid-state batteries using the xLi2O-TaCl5 amorphous solid electrolyte at 400 mA g−1, demonstrating vast application prospects of the oxychloride amorphous solid electrolytes.

Date: 2023
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DOI: 10.1038/s41467-023-39197-8

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