Boosting lithium-ion transport in halide solid-state electrolytes by aliovalent substitution for all-solid-state lithium-ion batteries

We report a novel chemical aliovalent substitution strategy that induces lithium vacancy generation, expands 3D Li⁺ migration channels, and reduces activation energy. The optimized composition Li_1.8Zr_0.8Nb_0.2Cl₆ achieves a room-temperature ionic conductivity twice higher than that of pristine Li₂ZrCl₆, realizing stable cycling in all-solid-state lithium-ion batteries.