中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 35 No. 7 July 2025 |
（1. School of Metallurgy and Environment, Central South University, Changsha 410083, China;
2. Hunan Provincial Key Laboratory of Nonferrous Value-added Metallurgy, Central South University, Changsha 410083, China;
3. Advanced Battery Materials Engineering Research Center of the Ministry of Education, Central South University, Changsha 410083, China;
4. Hunan Energy Frontiers New Materials Technology Co., Ltd., Changsha 410208, China;
5. Wanxiang 123 Co., Ltd., Hangzhou 311200, China;
6. National Key Laboratory of Energy, Metal Resources and New Materials, Central South University, Changsha 410083, China）
Abstract:A dual-halide solid electrolyte, Li3YCl3Br3, was synthesized using a wet-chemistry route instead of the conventional mechanical ball-milling route. Li3YCl3Br3 exhibits an ion conductivity of 2.08 mS/cm and an electro- chemical stability window of 3.8 V. Additionally, an all-solid-state lithium-ion battery using Li3YCl3Br3 and LiNi0.83Co0.11Mn0.06O2 (NCM811) as the cathode material achieves a capacity retention of 93% after 200 cycles at 0.3C and maintains a specific capacity of 115 mA·h/g during 2C cycling. This exceptional performance is attributed to the high oxidative stability of Li3YCl3Br3 and the in-situ formation of Y2O3 inert protective layer on the NCM811 surface under high voltage. Consequently, the study demonstrates the feasibility of a simple, cost-effective wet-chemistry route for synthesizing multi-component halides, highlighting its potential for large-scale production of halide solid electrolytes for practical applications.
Key words: halide solid electrolytes; all-solid-state batteries; wet-chemistry route; by-product; inert layer
