A Universal Self‐Propagating Synthesis of Aluminum‐Based Oxyhalide Solid‐State Electrolytes

作者：Simeng Zhang, Yang Xu, Han Wu, Tianlu Pang, Nian Zhang, Changtai Zhao, Junyi Yue, Jiamin Fu, Shengjie Xia, Xiangzhen Zhu, Guanzhi Wang, Hui Duan, Biwei Xiao, Tao Mei, Jianwen Liang, Xueliang Sun, Xiaona Li · 发表于：Angewandte Chemie International Edition · 年份：2024 · DOI：10.1002/anie.202401373 · 被引用次数：48 · 研究领域：Advanced Battery Materials and Technologies、Layered Double Hydroxides Synthesis and Applications、Inorganic Chemistry and Materials

Abstract Inorganic solid‐state electrolytes (SSEs) play a vital role in high‐energy all‐solid‐state batteries (ASSBs). However, the current method of SSE preparation usually involves high‐energy mechanical ball milling and/or a high‐temperature annealing process, which is not suitable for practical application. Here, a facile strategy is developed to realize the scalable synthesis of cost‐effective aluminum‐based oxyhalide SSEs, which involves a self‐propagating method by the exothermic reaction of the raw materials. This strategy enables the synthesis of various aluminum‐based oxyhalide SSEs with tunable components and high ionic conductivities (over 10 −3 S cm −1 at 25 °C) for different cations (Li + , Na + , Ag + ). It is elucidated that the amorphous matrix, which mainly consists of various oxidized chloroaluminate species that provide numerous sites for smooth ion migration, is actually the key factor for the achieved high conductivities. Benefit from their easy synthesis, low cost, and low weight, the aluminum‐based oxyhalide SSEs synthesized by our approach could further promote practical application of high‐energy‐density ASSBs.