globalchange  > 气候变化与战略
DOI: 10.1016/j.scib.2021.05.002
论文题名:
In situ observation of cracking and self-healing of solid electrolyte interphases during lithium deposition
作者: Yang T.; Li H.; Tang Y.; Chen J.; Ye H.; Wang B.; Zhang Y.; Du C.; Yao J.; Guo B.; Shen T.; Zhang L.; Zhu T.; Huang J.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2021
卷: 66, 期:17
起始页码: 1754
结束页码: 1763
语种: 英语
中文关键词: Environmental transmission electron microscopy ; Lithium batteries ; Lithium whisker ; Solid electrolyte interphase
英文关键词: Deposition rates ; Lithium batteries ; Self-healing materials ; Solid electrolytes ; Solid-State Batteries ; Competing process ; Dendrite growth ; Environmental transmission electron microscopes ; Environmental transmission electron microscopy ; In-situ observations ; Lithium dendrite ; Lithium whisker ; Self-healing ; Solid electrolyte interphase ; Whisker growth ; High resolution transmission electron microscopy
英文摘要: The growth of lithium (Li) whiskers is detrimental to Li batteries. However, it remains a challenge to directly track Li whisker growth. Here we report in situ observations of electrochemically induced Li deposition under a CO2 atmosphere inside an environmental transmission electron microscope. We find that the morphology of individual Li deposits is strongly influenced by the competing processes of cracking and self-healing of the solid electrolyte interphase (SEI). When cracking overwhelms self-healing, the directional growth of Li whiskers predominates. In contrast, when self-healing dominates over cracking, the isotropic growth of round Li particles prevails. The Li deposition rate and SEI constituent can be tuned to control the Li morphologies. We reveal a new “weak-spot” mode of Li dendrite growth, which is attributed to the operation of the Bardeen-Herring growth mechanism in the whisker's cross section. This work has implications for the control of Li dendrite growth in Li batteries. © 2021 Science China Press
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170473
Appears in Collections:气候变化与战略

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作者单位: Clean Nano Energy Center, State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, China; Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education, School of Materials Science and Engineering, Xiangtan University, Xiangtan, 411105, China; Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, 066004, China; State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China; Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States

Recommended Citation:
Yang T.,Li H.,Tang Y.,et al. In situ observation of cracking and self-healing of solid electrolyte interphases during lithium deposition[J]. Science Bulletin,2021-01-01,66(17)
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