Structural Evolution in Disordered Rock Salt Cathodes.

ABSTRACT: Li-excess Mn-based disordered rock salt oxides (DRX) are promising Li-ion cathode materials owing to their cost-effectiveness and high theoretical capacities. It has recently been shown that Mn-rich DRX Li_1+xMn_yM_1-x-yO₂ (y ≥ 0.5, M are hypervalent ions such as Ti⁴⁺ and Nb⁵⁺) exhibit a gradual capacity increase during the first few charge-discharge cycles, which coincides with the emergence of spinel-like domains within the long-range DRX structure coined as "δ phase". Here, we systematically study the structural evolution upon heating of Mn-based DRX at different levels of delithiation to gain insight into the structural rearrangements occurring during battery cycling and the mechanism behi

SUBMITTER: Li T 

PROVIDER: S-EPMC11378274 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature