Mechanochemically Disordered Li <sub>2</sub> Ta <sub>2</sub> OCl <sub>10</sub> Oxyhalide Unlocks Superionic Conductivity (>10 mS.cm <sup>−1</sup>
All‐solid‐state lithium‐metal batteries (ASSBs) offer a promising route to surpass the energy‐density limits of conventional lithium‐ion technology. However, their commercialization is hindered by interfacial instability, chemo‐mechanical degradation, and the limited ionic conductivity of current solid electrolytes...