A High‐Entropy Engineering on Sustainable Anionic Redox Mn‐Based Cathode with Retardant Stress for High‐Rate Sodium‐Ion Batteries

at 5 C. Notably, comparative studies through multimodal characterization techniques highlight HE-NMCO's superior reversibility in oxygen anion redox (OAR) reactions over extensive cycling, contrasting sharply with conventional NMCO cathode. This work elucidates the potential for advancing high energy and power density Mn-based cathodes for SIBs through local species diversity.