“…Therefore, the distinct two-step voltage profile can be explained with one from the Fe-rich phase and the other from the Mn-rich phase. The perfect homogeneous distribution of Fe and Mn ionic sites through the overall lattice structure should have produced an average plateau across the voltage profile [42][43][44]. In spite of primarily consisting of an electrochemically poor LiMnPO 4 phase, the solid solution LiFe 0.4 Mn 0.6 PO 4 has improved electrochemical properties, even compared to LiFePO 4 .…”