材料科学
枝晶(数学)
阳极
电解质
锂(药物)
电流密度
电极
固态
纳米技术
化学工程
物理化学
医学
化学
物理
几何学
数学
量子力学
工程类
内分泌学
作者
Xiaoming Bai,Guangyu Zhao,Guiye Yang,Ming Wang,Jiachi Zhang,Naiqing Zhang
标识
DOI:10.1016/j.ensm.2023.103041
摘要
Garnet-based solid-state Li batteries are considered as important candidates of the next generation batteries due to their potentially high energy density and reliable safety, however the Li dendrite issue is a serious impediment to their further development. Herein, a functional gradient interlayer (FGIL) is introduced at the interface between the garnet and Li anode, which is formed by the in-situ reaction of molten Li with FeF3 assisted by a magnetic force. The FGIL not only reduces the interfacial impedance, evens out the local current distribution, and prevents the growth of Li dendrites on the electrode surface, but also blocks electron transport and prevents the formation of "Li filaments" inside the electrolyte. Consequently, the Li|LLZTO-FGIL|Li cells have a critical current density of up to 2.3 mA cm−2 and exhibit stable cycling for more than 3400 h at 0.3 mA cm−2.
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