Lithium metal stripping mechanisms revealed through electrochemical liquid cell electron microscopy
Date Published |
11/2022
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Publication Type | Journal Article
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Authors | |
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DOI |
10.1016/j.nanoen.2022.107641
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Abstract |
An understanding of lithium stripping is as important as that of lithium plating to achieve significant advances in using lithium metal anodes for high-energy rechargeable batteries. However, there have been limited studies on lithium stripping compared to lithium plating. Here we report the lithium stripping mechanisms revealed through in-situ electrochemical liquid cell transmission electron microscopy (TEM). We directly observe and compare the stripping behavior of the in-situ grown lithium dendrites and lithium nanograins covered by a lithium fluoride-rich solid-electrolyte interphase (SEI). We find the sporadic lithium stripping behavior and three important modes that can describe the stripping of individual lithium deposits, regardless of their morphology: (i) symmetric stripping, (ii) surface-preferred asymmetric stripping, and (iii) interface-preferred asymmetric stripping. In addition, SEI chemical mapping with high spatial resolution shows a remarkable SEI loss at the end of the lithium metal stripping, which illustrates the importance of SEI protection in the subsequent cycles. |
Journal |
Nano Energy
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Volume |
102
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Year of Publication |
2022
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Pagination |
107641
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ISSN Number |
22112855
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URL | |
Short Title |
Nano Energy
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Refereed Designation |
Refereed
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Organizations | |
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