Stress‐Induced Anomalous Lithiation Plateau of LiFeyMn1−yPO4 Over High‐Rate Discharging (Adv. Energy Mater. 10/2025)

Cathode Materials

In article number 2404929, Kaipeng Wu and co-workers demonstrate that the anomalous lithiation plateau of LiFe_yMn_1−yPO₄ originates from stress concentration occurring at the interface between particle surface and bulk during rapid lithium insertion. This stress alleviates the lattice distortion of MnO₆ octahedra, thereby enhancing the Li⁺ diffusion kinetics and eventually unlocking the capacity of Mn³⁺.