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Investigating the effect of lithiation on polycrystalline NMC811 Li-ion battery cathode cracking using in situ SEM micromechanical testing
File(s)
d5ee00976f.pdf (5.42 MB)
Published version
Author(s)
Omirkhan, Aigerim
Gavalda-Diaz, Oriol
Wang, Siyang
Stephens, Ifan EL
Giuliani, Finn
Type
Journal Article
Abstract
The mechanical degradation of polycrystalline NMC811 cathode particles during electrochemical cycling was investigated using in situ powder compression and nanoindentation. The research demonstrates a significant reduction in particle strength upon the first delithiation, with only partial recovery upon (re)lithiation. Continuous cycling within the normal operating window leads to further mechanical degradation, likely due to cracking and potential rock-salt layer formation. This method can be applied to other materials chemistries and used as a reliable and quick method to quantify the mechanical stability of other spherical particles exposed to electrochemical cycling.
Date Issued
2025-10-21
Date Acceptance
2025-09-16
Citation
Energy and Environmental Science, 2025, 18 (20), pp.9254-9262
URI
URL
DOI
ISSN
1754-5692
Publisher
Royal Society of Chemistry
Start Page
9254
End Page
9262
Journal / Book Title
Energy and Environmental Science
Volume
18
Issue
20
Copyright Statement
© The Royal Society of Chemistry 2025 Open Access Article This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
License URL
Publication Status
Published
Date Publish Online
2025-09-17