Year: 2025
Type: article
Abstract: Lithium manganese nickel oxides are a prominent class of materials used for positively charged lithium-ion batteries. Three different archetype stoichiometries of lithium nickel manganese cobalt oxides (NMC) were studied with bulk-sensitive X-ray Raman and surface-sensitive soft X-ray absorption spectroscopy. We have conducted complementary operando battery X-ray experiments on the NMC622 electrode over one full charge and discharge cycle in a specifically designed operando battery cell. The ex situ NEXAFS spectra of the Ni L-edges show distinct differences in their multiplet characteristics depending on the cathode composition. The obtained operando X-ray Raman spectra show changes in the branching ratio of the Ni 2p spectra and confirms that the state of charge of the battery correlates with changes in the bulk of the electrode.
Source: MRS Advances
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,390
Funders: National Science Foundation, European Association of National Metrology Institutes, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Secretário de Ciência, Tecnologia e Ensino Superior, Governo do Estado de Parana, National Institutes of Health, National Institute of General Medical Sciences, SLAC National Accelerator Laboratory
OpenAlex ID: W4414494014