Manganese based layered oxides with modulated electronic and thermodynamic properties for sodium ion batteries.

ABSTRACT: Manganese based layered oxides have received increasing attention as cathode materials for sodium ion batteries due to their high theoretical capacities and good sodium ion conductivities. However, the Jahn-Teller distortion arising from the manganese (III) centers destabilizes the host structure and deteriorates the cycling life. Herein, we report that zinc-doped Na_0.833[Li_0.25Mn_0.75]O₂ can not only suppress the Jahn-Teller effect but also reduce the inherent phase separations. The reduction of manganese (III) amount in the zinc-doped sample, as predicted by first-principles calculations, has been confirmed by its high binding energies and the reduced octahedral structural variations. In the viewpoint of thermodynamics, the zinc-doped sample has

SUBMITTER: Zhang K 

PROVIDER: S-EPMC6323141 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature