EXAFS measurements on LiMnNiO oxides for battery application

Résumé fourni par la source

LiMnFeNiO layered oxides are promising cathode materials for next-generation lithium-ion batteries due to their high energy density and the potential to reduce the use of critical elements. Understanding the local structural evolution of the transition-metal sublattice during electrochemical cycling is essential for improving their electrochemical performance and long-term stability. In this study, Fe and Mn K-edge EXAFS measurements will be performed to probe the local coordination environment, bond distances, and structural disorder around the Fe and Mn atoms at different states of charge. The element-selective nature of EXAFS will provide direct insight into the role of each transition metal during lithium extraction and insertion, allowing us to correlate local structural changes with the electrochemical behavior of the material. The results will contribute to a deeper understanding of the charge compensation mechanisms and structural stability of LiMnFeNiO cathodes, providing valu

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