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Guiding Uniform Li Plating/Stripping through Lithium–Aluminum Alloying Medium for Long‐Life Li Metal Batteries
Author(s) -
Ye Huan,
Zheng ZiJian,
Yao HuRong,
Liu ShunChang,
Zuo TongTong,
Wu XiongWei,
Yin YaXia,
Li NianWu,
Gu JiangJiang,
Cao FeiFei,
Guo YuGuo
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201811955
Subject(s) - faraday efficiency , nucleation , stripping (fiber) , materials science , lithium (medication) , alloy , lithium metal , aluminium , plating (geology) , electrochemistry , layer (electronics) , electrode , cycling , metal , chemical engineering , metallurgy , nanotechnology , chemistry , composite material , electrolyte , medicine , organic chemistry , archaeology , geophysics , geology , engineering , history , endocrinology
The uncontrolled growth of Li dendrites upon cycling might result in low coulombic efficiency and severe safety hazards. Herein, a lithiophilic binary lithium–aluminum alloy layer, which was generated through an in situ electrochemical process, was utilized to guide the uniform metallic Li nucleation and growth, free from the formation of dendrites. Moreover, the formed LiAl alloy layer can function as a Li reservoir to compensate the irreversible Li loss, enabling long‐term stability. The protected Li electrode shows superior cycling over 1700 h in a Li|Li symmetric cell.