Tailoring the redox-active transition metal content to enhance cycling stability in cation-disordered rock-salt oxides

Lithium-excess cation-disordered rock-salt oxides (DRXs) are investigated intensively as cathode materials for future lithium-ion batteries combining cationic and anionic redox reactions. However, the lattice oxygen redox can cause severe oxygen release resulting in rapid capacity fading. Here, we investigate a series of xLi(2)TiO(3)-(1 - x)LiMnO2 (0