In Situ Magnetism Decoupling Gradient-Regulated Mn–O Interaction Mechanism on Stabilizing Li-Rich Cathodes

at 1 C and outstanding retention of 91.8% after 200 cycles at 2 C. To elucidate the underlying atomic-level interaction mechanism behind them, in situ magnetism characterization is employed and reveals that the gradient design effectively stabilizes Mn-O interaction and suppresses O-O dimer formation, alleviating irreversible anionic oxygen redox and undesirable structural degradation after long-term cycling. This work affords an effective gradient strategy to regulate the Mn-O interaction, opening up a new perspective for developing Li-rich Mn-based cathode materials.