Temperature‐Dependent Nucleation and Growth of Dendrite‐Free Lithium Metal Anodes

It is essential to develop a facile and effective method to enhance the electrochemical performance of lithium metal anodes for building high‐energy‐density Li‐metal based batteries. Herein, we explored the temperature‐dependent Li nucleation and growth behavior and constructed a dendrite‐free Li me...

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Bibliographic Details
Published in:Angewandte Chemie (International ed.) 2019-08, Vol.58 (33), p.11364-11368
Main Authors: Yan, Kang, Wang, Jiangyan, Zhao, Shuoqing, Zhou, Dong, Sun, Bing, Cui, Yi, Wang, Guoxiu
Format: Article
Language:English
Subjects:
Anode effect
Anodes
Batteries
dendrite-free
Dendritic structure
Density
Diffusion coefficient
Electrochemical analysis
Electrochemistry
Electrolytes
Electrolytic cells
High temperature
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Ion diffusion
ion migration
Li metal anodes
Lithium
Metals
Microscopy
Nucleation
nucleation and growth
Temperature dependence
Temperature effects
temperature-dependent behavior
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Summary:It is essential to develop a facile and effective method to enhance the electrochemical performance of lithium metal anodes for building high‐energy‐density Li‐metal based batteries. Herein, we explored the temperature‐dependent Li nucleation and growth behavior and constructed a dendrite‐free Li metal anode by elevating temperature from room temperature (20 °C) to 60 °C. A series of ex situ and in situ microscopy investigations demonstrate that increasing Li deposition temperature results in large nuclei size, low nucleation density, and compact growth of Li metal. We reveal that the enhanced lithiophilicity and the increased Li‐ion diffusion coefficient in aprotic electrolytes at high temperature are essential factors contributing to the dendrite‐free Li growth behavior. As anodes in both half cells and full cells, the compact deposited Li with minimized specific surface area delivered high Coulombic efficiencies and long cycling stability at 60 °C. Electrode plating: Strong lithiophilicity and fast lithium‐ion migration at elevated temperature facilitate the formation of large and sparse Li nuclei, thus contributing to a compact and smooth Li deposition layer on anodes. Thus dendrite‐free Li metal anodes with excellent electrochemical performances were achieved for metal‐based batteries.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201905251