Depolarization of Li?rich Mn?based oxide via electrochemically active Prussian blue interface providing superior rate capability

The high-rate cyclability of Li-rich Mn-based oxide (LMO) is highly limited by the electrochemical polarization resulting from slow kinetic Li2MnO3 phase. Herein, Prussian blue (PB) coating layer with specific redox potential introduced as a functionalized interface to overcome side effect and escaping O on surface LMO, especially its poor rate capability. In detail, PB can restrict large LMO sharing overloaded current at high due synchronous LMO. Consequently, an enhanced performance capacity retention 87.8% over 300 cycles obtained, which superior 50.5% pristine electrode. Such strategies compatible good low-rate performances may attract great attention for pursuing durable performances.