In:
ECS Meeting Abstracts, The Electrochemical Society, Vol. MA2020-02, No. 2 ( 2020-11-23), p. 269-269
Abstract:
The capability of the tailored solid-solution spinel, MgCrMnO 4 , is evaluated by theoretical and experimental approaches. Lattice Mg 2+ in the designed oxide is electrochemically utilized at high potentials in a non-aqueous electrolyte. Complementary evidence supports bulk Mg 2+ (de)intercalation throughout the designed oxide frame where strong electrostatic interaction between Mg 2+ and O 2- exists. Mg/Mn antisite inversion in the spinel is lowered via post-annealing to further improve Mg +2 mobility. Spinel lattice is preserved upon removal of Mg 2+ without any phase transformations, denoting structural stability at the charged state at a high potential. In the remagnesiated state, insertion of Mg 2+ into interstitial sites in the spinel is detected possibly resulting in partial reversibility which needs to be addressed for structural stability. The observations constitute a first clear path to the development of a practical high voltage Mg-ion cathode using a spinel oxide.
Type of Medium:
Online Resource
ISSN:
2151-2043
DOI:
10.1149/MA2020-022269mtgabs
Language:
Unknown
Publisher:
The Electrochemical Society
Publication Date:
2020
detail.hit.zdb_id:
2438749-6