Abstract
All-solid-state lithium-ion batteries (ASSLBs) are an important milestone for the future of energy storage because of their capability of impressive energy density and outstanding safety. However, oxide and sulfide solid-state electrolytes (SSEs) suffer from either low ionic conductivity or poor chemical stability. In contrast, halide-based SSEs, are promising as candidate materials owing to high conductivity, good stability, and broad cathode compatibility. Element doping is an effective and common approach to further improve the electrochemical properties of SSEs. For this aspect, a serious of Li3-xIn1-xZrxCl6 were synthesised to explore the influences of zircounium dopant on Li3InCl6 . The synthesized Li2.75In0.75Zr0.25Cl6 exhibited Li ionic conductivity of 5.82 × 10–3 S·cm–1 at room temperature, which is the highest among reported halide SSEs. The ASSLB formed with Li2CoO2-Li2.75In0.75Zr0.25Cl6-Li/In delivers a high initial capacity of 129.3 mAh·g-1. Conclusively, this work provides an effective approach for the development of halide SSEs with improved stability and conductivity. The compelling results provide further possibilities and capabilities in future SSE research.
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