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Intercalation-Type Halide Cathode Material for All-Solid-State Lithium Batteries
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DOI：10.1021/acs.nanolett.5c04257.png)
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Abstract
En 中文
All-solid-state lithium batteries (ASSLBs) have garnered widespread attention due to their safety and high energy density. However, their electrochemical performances are significantly limited by the cathode materials. Herein, we present a layered halide cathode material, TiCl3, suitable for halide-based ASSLBs. TiCl3 undergoes reversible redox reactions, facilitating the insertion and extraction of Li+ at the Li1 and Li2 sites situated between the TiCl6 octahedral interlayers without any phase transformation. The ASSLBs utilizing TiCl3 as the cathode demonstrate a capacity of up to 170.6 mAh g-1, satisfactory rate performance, and excellent cycling stability, with a capacity retention of 81.4% after 200 cycles at 0.2 C. Long-term cycling neither causes a significant increase in impedance nor produces obvious element diffusion at the cathode/solid-state electrolyte interface, demonstrating the compatibility between them. This study will greatly promote the development of new cost-effective halide cathode materials and contribute to the industrialization of ASSLBs.
Keywords:
halide cathode
layered structure
intercalationchemistry
binary materials
all-solid-state lithiumbatteries
Journal
IF:
9.1
Papers:
2.7W
Citations:
16.5W