Anionic Redox Processes in Maricite- and Triphylite-NaFePO of Sodium-Ion Batteries.

In recent years, NaFePO has been regarded as one of the most promising cathode materials for next-generation rechargeable sodium-ion batteries. There is significant interest in the redox processes of rechargeable batteries for high capacity applications. In this paper, the redox processes of triphylite-NaFePO and maricite-NaFePO materials have been analyzed based on first-principles calculations and analysis of Bader charges.