Sequential delithiation behavior and structural rearrangement of a nanoscale composite-structured Li_1.2Ni_0.2Mn_0.6O₂ during charge-discharge cycles.

ABSTRACT: Lithium- and manganese-rich layered oxides (LMRs) are promising positive electrode materials for next-generation rechargeable lithium-ion batteries. Herein, the structural evolution of Li_1.2Ni_0.2Mn_0.6O₂ during the initial charge-discharge cycle was examined using synchrotron-radiation X-ray diffraction, X-ray absorption spectroscopy, and nuclear magnetic resonance spectroscopy to elucidate the unique delithiation behavior. The pristine material contained a composite layered structure composed of Ni-free and Ni-doped Li₂MnO₃ and LiMO₂ (M = Ni, Mn) nanoscale domains, and Li ions were sequentially and inhomogeneously extracted from the composite structure. Delithiation from the LiMO₂ domain was observed in

SUBMITTER: Shimoda K 

PROVIDER: S-EPMC7308291 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature