Mitigating Mn‐Driven Interfacial Instability in LiMn _0.5 Fe _0.5 PO ₄ Cathodes for Lithium‐Ion Batteries via Surface‐Intensive Ta Doping

, 54.8%). In addition, under high-SOC storage conditions (60°C, 10d), Ta1@LMFP maintains 99.5% of its initial capacity, whereas Ta0@LMFP retains 83.1%, confirming that self-discharge and interfacial degradation are suppressed at high temperature and high SOC. This work demonstrates that surface-intensive Ta doping enables the wide-temperature-range and high-power operation of LMFP-based cathodes and provides compositional and structural design guidelines for developing robust cathode materials for Li-ion batteries.