A High‐Performance Li–Mn–O Li‐rich Cathode Material with Rhombohedral Symmetry via Intralayer Li/Mn Disordering

within 2.0-4.8 V. The excellent performance is attributed to its highly structural reversibility, mitigation of Jahn-Teller distortion, lower bandgap, and faster Li-ion 2D channels during the lithium-ion de/intercalation process. This material is not only a promising cathode material candidate but also raises new possibilities for the design of low-cost and high-performance cathode materials.