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Chao, Zhao
다차원 탄소재료 연구단
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Lithium Deposition-Induced Fracture of Carbon Nanotubes and Its Implication to Solid-State Batteries

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Title
Lithium Deposition-Induced Fracture of Carbon Nanotubes and Its Implication to Solid-State Batteries
Author(s)
Chen, Jingzhao; Chao Zhao; Xue, Dingchuan; Zhang, Liqiang; Yang, Tingting; Du, Congcong; Zhang, Xuedong; Fang, Ruyue; Guo, Baiyu; Ye, Hongjun; Li, Hui; Dai, Qiushi; Zhao, Jun; Li, Yanshuai; Harris, Stephen J.; Tang, Yongfu; Feng Ding; Zhang, Sulin; Huang, Jianyu
Publication Date
2021-08
Journal
Nano Letters, v.21, no.16, pp.6859 - 6866
Publisher
American Chemical Society
Abstract
© 2021 American Chemical Society.The increasing demand for safe and dense energy storage has shifted research focus from liquid electrolyte-based Li-ion batteries toward solid-state batteries (SSBs). However, the application of SSBs is impeded by uncontrollable Li dendrite growth and short circuiting, the mechanism of which remains elusive. Herein, we conceptualize a scheme to visualize Li deposition in the confined space inside carbon nanotubes (CNTs) to mimic Li deposition dynamics inside solid electrolyte (SE) cracks, where the high-strength CNT walls mimic the mechanically strong SEs. We observed that the deposited Li propagates as a creeping solid in the CNTs, presenting an effective pathway for stress relaxation. When the stress-relaxation pathway is blocked, the Li deposition-induced stress reaches the gigapascal level and causes CNT fracture. Mechanics analysis suggests that interfacial lithiophilicity critically governs Li deposition dynamics and stress relaxation. Our study offers critical strategies for suppressing Li dendritic growth and constructing high-energy-density, electrochemically and mechanically robust SSBs.
URI
https://pr.ibs.re.kr/handle/8788114/10231
DOI
10.1021/acs.nanolett.1c01910
ISSN
1530-6984
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > 1. Journal Papers (저널논문)
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