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Amorphization of halide solid electrolytes for lithium super-ionic conductivity
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DOI：10.1039/d4ta05362a.png)
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All-solid-state Li batteries (ASSLBs) have drawn attention as strong contenders for future energy storage owing to their extreme safety. When paired with uncoated 4 V-class layered positive materials, halide solid-state electrolytes (SSEs) exhibit excellent stability and compatibility, strong Li+ conductivity, and softness, making them highly potential SSE materials. Despite its cost-effective precursors, Li2ZrCl6 is plagued by its inherently poor ionic conductivity. Herein, we report a non-crystalline halide SSE, Li2.2ZrCl5.8S0.2, which possesses a superior Li+ conductivity (0.86 mS cm-1) and can be applied in high-performance ASSLBs. By integrating the Li2.2ZrCl5.8S0.2 SSE with a LiIn negative material and an uncoated LiCoO2 positive material, we acquire ordinary-temperature ASSLBs exhibiting excellent cycle-life (93.4% capacity retention under 1C for 100 cycles) and high-rate capacity (exceeding 80 mA h g-1 at 2C). The work proposes a non-crystalline strategy to improve Li+ conductivity in Li2ZrCl6-family SSEs for ASSLSBs. A non-crystalline strategy to improve Li+ conductivity in Li2ZrCl6-family halide solid-state electrolytes for all-solid-state Li batteries.
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9.5
论文数:
3.3W
被引数:
21.7W
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