材料科学
卤化物
电解质
热传导
离子
化学工程
无机化学
复合材料
物理化学
电极
有机化学
工程类
化学
作者
Xiaochen Yang,Xiaochen Yang,Sunny Gupta,Sunny Gupta,Yu Chen,Yu Chen,Doğancan Sarı,Doğancan Sarı,Han‐Ming Hau,Han‐Ming Hau,Zijian Cai,Zijian Cai,Chaochao Dun,Mei Qi,Lu Ma,Yi Liu,Jeffrey J. Urban,Gerbrand Ceder,Gerbrand Ceder
标识
DOI:10.1002/aenm.202400163
摘要
Abstract The discovery of mechanically soft solid‐state materials with fast Mg‐ion conduction is crucial for the development of solid‐state magnesium batteries. In this paper, novel magnesium gallium halide compounds are reported that achieve high ionic conductivity of 0.47 mS cm −1 at room temperature. These Mg‐ion conductors obtained by ball milling Mg and Ga salts exhibit clay‐like mechanical properties, enabling intimate contact at the electrode–electrolyte interface during battery cycling. With a combination of experimental and computational analysis, this study identifies that the soft‐clay formation is induced by partial anion exchange during milling. This partial anion exchange creates undercoordinated magnesium ions in a chlorine‐rich environment, yielding fast Mg‐ion conduction. This work demonstrates the potential of clay‐like halide electrolytes for all‐solid‐state magnesium batteries, with possible further extension to other multivalent battery systems.
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