化学
离子键合
动力学
锂(药物)
金属锂
导电体
金属
快离子导体
无机化学
离子
物理化学
有机化学
电极
电解质
复合材料
医学
物理
材料科学
量子力学
内分泌学
作者
Wenbo Zhai,Yue Zhang,He Shi,Xiangchen Hu,Runlong Hao,Wei Liu,Yi Yu
摘要
Investigating the growth kinetics of Li metal in solid-state batteries is crucial to both a fundamental understanding and practical application. Here, by directly observing the formation of Li metal from Ta-doped Li6.4La3Zr1.4Ta0.6O12 (LLZTO) in a transmission electron microscope, the growth kinetics is analyzed quantitatively. The growth kinetics of Li deposits shows a cubic-curve characteristic for LLZTO with Li-source-free. Instead, a linear growth process is observed with Li-source supplied. The impact of the illuminating electron dose rate on the growth kinetics is clarified, indicating that even low dose rates (1–3 e–/Å2/s) could affect Li growth, highlighting the significance of controlling dose rates. Furthermore, a new pathway for the formation of Li metal from Li-containing materials utilizing the field-emission effect is reported. This work has implications on the failure mechanism in solid batteries by using limited Li anodes and opens pathways for regulating Li growth in LLZTO at various scenarios, which can also extend to other ionic conductors.
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