Realizing reversible anionic redox based on a Na–O–Li configuration for Na-layered oxide cathodes with solid-solution reaction

Mn-based layered oxide cathodes with anionic redox activity are desirable for sodium-ion batteries due to their high specific energy and low cost. Rational modulation of electronic configurations enables a complete solid-solution reaction in the Na-O-Li configuration, enhancing and stabilizing the capacity derived from anionic redox.