Perovskite Fluoride Anode Stabilized via Ligand‐Field Engineering for High‐Performance Lithium‐Ion Batteries

. Theoretical calculations further reveal that Mn doping stabilizes a low-spin Fe state, which mitigates crystal-field distortions while simultaneously facilitating the formation of a robust LiF-rich solid-electrolyte interphase (SEI). This work offers an electronic-state-driven solution to the coupled mechanical-chemical degradation, thereby establishing ligand-field regulation as a fundamental design principle for developing advanced conversion-type electrodes.