Redox Chemistry and the Role of Trapped Molecular O<sub>2</sub> in Li-Rich Disordered Rocksalt Oxyfluoride Cathodes
Ryan Sharpe, Robert A. House, Matthew Clarke, Dominic P. Förstermann, John‐Joseph Marie, Giannantonio Cibin, Ke‐Jin Zhou, Helen Y. Playford, Peter G. Bruce, M. Saiful Islam
Abstract
. We furthermore derive the relationship between local coordination environment and redox potential; this gives rise to the observed overlap in Mn and O redox couples and reveals that the onset potential of oxide ion oxidation is determined by the degree of ionicity around oxygen, which extends models based on linear Li-O-Li configurations. This study advances our fundamental understanding of redox mechanisms in disordered rocksalt oxyfluorides, highlighting their promise as high capacity cathodes.
Topics & Concepts
RedoxChemistryCathodeOctahedronIonVacancy defectOxygenChemical physicsLithium (medication)OxideInorganic chemistryCrystallographyPhysical chemistryOrganic chemistryEndocrinologyMedicineAdvancements in Battery MaterialsAdvanced Battery Materials and TechnologiesSupercapacitor Materials and Fabrication