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Ding, Feng
IBS - Center for Multidimensional Carbon Materials (CMCM)
Research Interests
  • Theoretical methods development for materials studies.
  • The formation mechanism of various carbon materials, from fullerene to carbon nanotube and graphene.
  • Kinetics and thermodynamics of materials growth and etching.
  • The structure, properties and fundamentals of nanomaterials.
  • The experimental synthesis of carbon nanotubes.

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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
Chen, JingzhaoZhao, ChaoXue, DingchuanZhang, LiqiangYang, TingtingDu, CongcongZhang, XuedongFang, RuyueGuo, BaiyuYe, HongjunLi, HuiDai, QiushiZhao, JunLi, YanshuaiHarris, Stephen J.Tang, YongfuDing, FengZhang, SulinHuang, Jianyu
Issue Date
2021-08
Publisher
AMER CHEMICAL SOC
Citation
NANO LETTERS, v.21, no.16, pp.6859 - 6866
Abstract
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://scholarworks.unist.ac.kr/handle/201301/54005
URL
https://pubs.acs.org/doi/10.1021/acs.nanolett.1c01910
DOI
10.1021/acs.nanolett.1c01910
ISSN
1530-6984
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