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Halide Layer Cathodes for Compatible and Fast-Charged Halides-Based All-Solid-State Li Metal Batteries
Jianwen Liang1, Xiaona Li1, Jung Tae Kim1
1Department of Mechanical and Materials Engineering, University of Western Ontario, 1151 Richmond St, London, Ontario, N6A 3K7, Canada.
Angewandte Chemie (International Ed. in English)
|January 25, 2023
Summary
This study introduces halide insertion materials for all-solid-state lithium batteries. These novel vanadium halide (VX3) cathodes demonstrate high performance, overcoming previous solubility challenges.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Oxide and sulfide insertion compounds are established cathode materials for lithium-ion batteries.
- Halide materials are underexplored due to solubility issues in liquid electrolytes.
Purpose of the Study:
- To investigate the insertion electrochemistry of vanadium trihalides (VX3) as cathode materials.
- To develop a compatible halide solid-state electrolyte for stable battery operation.
Main Methods:
- Utilized X-ray absorption near-edge structure (XANES) spectroscopy for structural analysis.
- Designed and tested all-solid-state lithium batteries with VX3 cathodes and halide electrolytes.
Main Results:
- Demonstrated a two-step lithiation process and structural transition in VCl3.
- Achieved fast lithium-ion insertion/extraction kinetics in layered VX3 materials.
- Enabled high rate capability and stable cycling in all-solid-state Li-VX3 batteries.
Conclusions:
- Established the viability of halide materials for intercalation insertion electrochemistry.
- Highlighted the potential of VX3 compounds as novel electrode materials for energy storage.
- The compatible solid-state electrolyte design is crucial for stable halide-based battery performance.
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