Revisiting the ion dynamics in Li _<i>x</i> CoO₂ and Na _<i>x</i> CoO₂.

ABSTRACT: Layered oxides (AMO₂, where A = Li or Na and M = transition metal) are essential positive electrode materials for lithium- and sodium-ion batteries. A fundamental question in ion transport is whether Li⁺ or Na⁺ diffuses faster in these materials; however, distinguishing intrinsic diffusion properties from the effects of particle size and electrode composition is challenging. Using operando muon spin spectroscopy and molecular dynamics simulations, we determined the Li⁺ and Na⁺ self-diffusion coefficients in O3-Li _x CoO₂, O3-Na _x CoO₂, and P2-Na _x CoO₂. Our findings revealed that Na⁺ diffusion is higher in the P2-type structure than

SUBMITTER: Tatara R 

PROVIDER: S-EPMC12481442 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature