Positive-electrode properties and crystal structures of Mg-rich transition metal oxides for magnesium rechargeable batteries.

ABSTRACT: In this work, we focus on Mg-Fe-O and Mg-Ni-O with Mg-rich compositions as positive-electrode materials for magnesium rechargeable batteries, and prepare them by a thermal decomposition of precipitates obtained by a solution method. It is indicated from X-ray diffraction patterns that the Mg-Fe-O and Mg-Ni-O samples have the spinel and rocksalt structures, respectively. X-ray absorption near edge structures indicate that Fe and Ni are trivalent and divalent, respectively, in the Mg-rich oxides. From charge/discharge cycle test, it is demonstrated that the Mg-Fe-O shows higher discharge capacity than the other and then has good cycle performance while keeping a discharge capacity over 100 mA h g^-1. To gain deeper understanding on a relationship between the electrode properties an

SUBMITTER: Kitamura N 

PROVIDER: S-EPMC9613765 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature