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Halide Layer Cathodes for Compatible and Fast-Charged Halides-Based All-Solid-State Li Metal Batteries |
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| Authors: | Dr Jianwen Liang Dr Xiaona Li Jung Tae Kim Xiaoge Hao Dr Hui Duan Ruying Li Prof Xueliang Sun |
| Institution: | 1. Department of Mechanical and Materials Engineering, University of Western Ontario, 1151 Richmond St, London, Ontario, N6A 3K7 Canada
These authors contributed equally to this work.;2. Department of Mechanical and Materials Engineering, University of Western Ontario, 1151 Richmond St, London, Ontario, N6A 3K7 Canada |
| Abstract: | Insertion-type compounds based on oxides and sulfides have been widely identified and well-studied as cathode materials in lithium-ion batteries. However, halides have rarely been used due to their high solubility in organic liquid electrolytes. Here, we reveal the insertion electrochemistry of VX3 (X=Cl, Br, I) by introducing a compatible halide solid-state electrolyte with a wide electrochemical stability window. X-ray absorption near-edge structure analyses reveal a two-step lithiation process and the structural transition of typical VCl3. Fast Li+ insertion/extraction in the layered VX3 active materials and favorable interface guaranteed by the compatible electrode-electrolyte design enables high rate capability and stable operation of all-solid-state Li-VX3 batteries. The findings from this study will contribute to developing intercalation insertion electrochemistry of halide materials and exploring novel electrode materials in viable energy storage systems. |
| Keywords: | All-Solid-State Battery Halide Solid Electrolyte Insertion Electrochemistry Intercalation Cathode Materials VCl3 |