Magnetic Resonance
Magnetic Resonance
MR
Articles | Volume 5, issue 1
Articles | Volume 5, issue 1
https://doi.org/10.5194/mr-5-87-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/mr-5-87-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 5, issue 1
Research article
 | 
25 Jun 2024
Research article |  | 25 Jun 2024

Second-harmonic electron paramagnetic resonance spectroscopy and imaging reveal metallic lithium depositions in Li-ion batteries

Charles-E. Dutoit, Hania Ahouari, Quentin Denoyelle, Simon Pondaven, and Hervé Vezin

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Latest update: 20 Aug 2025
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Short summary
In our study, we correlate the first- and the second-harmonic detection modes of continuous-wave electron paramagnetic resonance (EPR) to identify traces of non-dendritic Li metal present on the graphite anode after multiple electrochemical cycles. Such metallic complexes are a source of limitations which reduce battery life and lead to serious safety issues. To improve their detection, we propose to simultaneously record the first- and second-harmonic EPR spectra.
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