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

• Published in: Nature communications Vol. 14; no. 1; p. 3780
• Main Authors: Zhang, Shumin, Zhao, Feipeng, Chen, Jiatang, Fu, Jiamin, Luo, Jing, Alahakoon, Sandamini H, Chang, Lo-Yueh, Feng, Renfei, Shakouri, Mohsen, Liang, Jianwen, Zhao, Yang, Li, Xiaona, He, Le, Huang, Yining, Sham, Tsun-Kong, Sun, Xueliang
• Format: Journal Article
• Language: English
• Published: England Nature Publishing Group 24.06.2023; Nature Publishing Group UK; Nature Portfolio
• Subjects: Body Fluids; Chlorides; Chlorine; Electrochemical analysis; Electrochemistry; Electrolytes; Ions; Lithium; Lithium batteries; Lithium ions; Mixed anions; Molten salt electrolytes; Rechargeable batteries; Solid electrolytes; Solid state; Structural models
• ISSN: 2041-1723; 2041-1723
• DOI: 10.1038/s41467-023-39197-8

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, xLi O-MCl (M = Ta or Hf, 0.8 ≤ x ≤ 2, y = 5 or 4). xLi O-MCl amorphous solid electrolytes can achieve desirable ionic conductivities up to 6.6 × 10 S cm 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 xLi O-MCl 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 xLi O-MCl 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 xLi O-TaCl amorphous solid electrolyte at 400 mA g , demonstrating vast application prospects of the oxychloride amorphous solid electrolytes.