Ex Situ Raman Mapping of LiMn₂O₄ Electrodes Cycled in Lithium-Ion Batteries.

ABSTRACT: In this study, we focus on the large-scale ex situ Raman mapping of LiMn₂O₄ (LMO) electrodes maintained at varying states of charge. A comprehensive statistical analysis has been conducted at an area of ca. 3660 μm² on more than 3100 collected spectra for each LMO electrode sample. High-definition ex situ Raman maps provide profound insight into the lithiation process, offering an additional perspective on the mechanism of LMO intercalation. These maps clearly depict the coexistence of two phases, with evident phase transitions and state-of-charge gradients. The set of spectra with various state-of-charge has been successfully deconvoluted taking into account the two-phase character of the ongoing reaction. In addition, we performed the study on the samples

SUBMITTER: Buchberger DA 

PROVIDER: S-EPMC11256290 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature