Detecting onset of lithium plating during fast charging of Li-ion batteries using operando electrochemical impedance spectroscopy
Date Published |
10/2021
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Publication Type | Journal Article
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Authors | |
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DOI |
10.1016/j.xcrp.2021.100589
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Abstract |
Electrochemical plating of Li metal on the graphite electrode is the key limitation behind slow charging times of Li-ion batteries (LIBs) in electric vehicles (EVs). Currently, electrochemical methods to detect the onset of Li plating while a battery is fast charging are sparse. In this study, we use operando electrochemical impedance spectroscopy to reliably detect the onset of Li plating on graphite electrodes in three-electrode LIBs. An increase in the graphite solid-electrolyte interface (SEI) resistance indicates that Li plating has occurred. By cross-validating with a highly sensitive ex situ chemical titration, we determine that this technique can detect very small amounts of plated Li (<0.6% of the graphite electrode’s capacity). We also offer physical explanations for the observed impedance behavior. Finally, we show that this technique can be applied to standard two-electrode LIB systems, making the method an important step toward safely implementing fast charging protocols for LIBs in EVs. |
Journal |
Cell Reports Physical Science
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Volume |
2
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Year of Publication |
2021
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Issue |
10
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Pagination |
100589
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ISSN Number |
26663864
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URL | |
Short Title |
Cell Reports Physical Science
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Refereed Designation |
Refereed
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Organizations | |
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