气候变化领域集成服务门户(CCPortal): In situ observation of cracking and self-healing of solid electrolyte interphases during lithium deposition

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DOI	10.1016/j.scib.2021.05.002
	In situ observation of cracking and self-healing of solid electrolyte interphases during lithium deposition
	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.
发表日期	2021
ISSN	20959273
起始页码	1754
结束页码	1763
卷号	66 期号:17
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
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
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207639
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
推荐引用方式 GB/T 7714	Yang T.,Li H.,Tang Y.,et al. In situ observation of cracking and self-healing of solid electrolyte interphases during lithium deposition[J],2021,66(17).
APA	Yang T..,Li H..,Tang Y..,Chen J..,Ye H..,...&Huang J..(2021).In situ observation of cracking and self-healing of solid electrolyte interphases during lithium deposition.Science Bulletin,66(17).
MLA	Yang T.,et al."In situ observation of cracking and self-healing of solid electrolyte interphases during lithium deposition".Science Bulletin 66.17(2021).