The Boundary of Lithium Plating in Graphite Electrode for Safe Lithium‐Ion Batteries

Uncontrolled Li plating in graphite electrodes endangers battery life and safety, driving tremendous efforts aiming to eliminate Li plating. Herein we systematically investigate the boundary of Li plating in graphite electrode for safe lithium‐ion batteries. The cell exhibits superior safety perform...

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Veröffentlicht in:Angewandte Chemie International Edition 2021-06, Vol.60 (23), p.13007-13012
Hauptverfasser: Cai, Wenlong, Yan, Chong, Yao, Yu‐Xing, Xu, Lei, Chen, Xiao‐Ru, Huang, Jia‐Qi, Zhang, Qiang
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container_issue 23
container_start_page 13007
container_title Angewandte Chemie International Edition
container_volume 60
creator Cai, Wenlong
Yan, Chong
Yao, Yu‐Xing
Xu, Lei
Chen, Xiao‐Ru
Huang, Jia‐Qi
Zhang, Qiang
description Uncontrolled Li plating in graphite electrodes endangers battery life and safety, driving tremendous efforts aiming to eliminate Li plating. Herein we systematically investigate the boundary of Li plating in graphite electrode for safe lithium‐ion batteries. The cell exhibits superior safety performance than that with Li dendrites by defining the endurable amount of uniform Li plating in graphite anode. The presence of “dead Li” can be eliminated owing to the uniform distribution of Li plating, and the average Coulombic efficiency for deposited Li during reversible plating/stripping process is decoupled as high as about 99.5 %. Attributing to the limited Li plating with superior Coulombic efficiency, the LiNi0.5Mn0.3Co0.2O2 | graphite cell achieves a high capacity retention of 80.2 % over 500 cycles. This work sheds a different light on further improving the fast‐charging capability, low‐temperature performance, and energy density of practical lithium‐ion batteries. The boundary of Li plating in a graphite electrode for safe lithium‐ion batteries is defined. The cell with regulated Li plating exhibits highly reversible Li plating/stripping Coulombic efficiency >99.5 % with superior safety performance, offering a strategy to achieve safe high‐energy fast‐charging lithium‐ion batteries.
doi_str_mv 10.1002/anie.202102593
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subjects battery safety performance
Dendrites
Electrodes
Flux density
Graphite
high Coulombic efficiency
Lithium
lithium plating
Lithium-ion batteries
Plating
Product safety
uniform distribution
title The Boundary of Lithium Plating in Graphite Electrode for Safe Lithium‐Ion Batteries
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