Strong Magnetic Exchange Interactions and Delocalized Mn-O States Enable High-Voltage Capacity in the Na-Ion Cathode P2-Na_0.67[Mg_0.28Mn_0.72]O₂.

ABSTRACT: The increased capacity offered by oxygen-redox active cathode materials for rechargeable lithium- and sodium-ion batteries (LIBs and NIBs, respectively) offers a pathway to the next generation of high-gravimetric-capacity cathodes for use in devices, transportation and on the grid. Many of these materials, however, are plagued with voltage fade, voltage hysteresis and O₂ loss, the origins of which can be traced back to changes in their electronic and chemical structures on cycling. Developing a detailed understanding of these changes is critical to mitigating these cathodes' poor performance. In this work, we present an analysis of the redox mechanism of P2-Na_0.67[Mg_0.28Mn_0.72]O₂, a layered NIB cathode whose high capacity has previousl

SUBMITTER: Bassey EN 

PROVIDER: S-EPMC11467838 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature