Structural Rearrangements of a Cobalt-Free Lithium-Rich Layered Oxide Cathode during Formation.

ABSTRACT: Formation during the first cycles of Li-rich layered oxide (LRLO) cathode materials consolidates the interphase and leads to structural changes that are decisive for long-term cyclability. However, the nature and effect of the changes are material-dependent and unknown for the important class of Co-free, Ni-poor LRLOs. Here, we analyze the processes during the tailored formation procedure of a typical class member, Li_1.28Ni_0.15Mn_0.57O₂, and demonstrate that it remarkably changes lattice composition and structure as a prerequisite for stable cycling. We combine electrochemistry, operando mass spectrometry, X-ray diffraction, and X-ray absorption spectroscopy with density functional theory simulations. Activation most prominently compresses

SUBMITTER: Busato M 

PROVIDER: S-EPMC12801421 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature