Visualization of Tetrahedral Li in the Alkali Layers of Li-Rich Layered Metal Oxides.

ABSTRACT: Understanding Li⁺ ion diffusion pathways in Li-rich layered transition metal (TM) oxides is crucial for understanding the sluggish kinetics in anionic O^2- redox. Although Li diffusion within the alkali layers undergoes a low-barrier octahedral-tetrahedral-octahedral pathway, it is less clear how Li diffuses in and out of the TM layers, particularly given the complex structural rearrangements that take place during the oxidation of O^2-. Here, we develop simultaneous electron ptychography and annular dark field imaging methods to unlock the Li migration pathways in Li_1.2Ni_0.13Mn_0.54Co_0.13O₂ associated with structural changes in the charge-discharge cycle. At the end of TM oxidation and before the high-vol

SUBMITTER: Song W 

PROVIDER: S-EPMC11363138 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature