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11 January 2023 Understanding the non-passivating behavior of silicon anodes for application in Li-ion batteries
Elisabetta Arca
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Proceedings Volume 12337, Photoemission Spectroscopy for Materials Analysis II; 1233704 (2023) https://doi.org/10.1117/12.2647202
Event: SPIE Photonex, 2022, Birmingham, United Kingdom
Abstract
In this report, the effect of the prelithiation process on the composition of the Solid Electrolyte Interphase (SEI) formed on Si anodes was investigated. It was demonstrated that the dry chemical method used for prelithiation compensate at least in part, the high first cycle irreversible capacity loss. X-ray Photoelectron Spectroscopy was used to determine the composition of the SEI at the end of the cycling process and compare it to previous studies carried out on these model electrodes. It was found that the prelithiation method does not interfere with the SEI dynamics, and both prelithiated and pristine samples show a very similar SEI composition. The method is thus suitable to compensate the first cycle irreversible capacity loss, however it does not help mitigating the underlaying SEI instability issue.
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Elisabetta Arca "Understanding the non-passivating behavior of silicon anodes for application in Li-ion batteries", Proc. SPIE 12337, Photoemission Spectroscopy for Materials Analysis II, 1233704 (11 January 2023); https://doi.org/10.1117/12.2647202
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KEYWORDS
Silicon
Lithium
Photoemission spectroscopy
Thin films
X-rays
X-ray characterization
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