Realizing Fe substitution through diffusion in preparing LiMn1 − xFexPO4-C cathode materials from MnPO4·H2O

We synthesize LiMn1 − xFexPO4-C cathode materials using MnPO4·H2O particles as the precursor. The substitution of Mn2 + with Fe2 + is successfully conducted by the diffusion of Fe2 + after the formation of LiMnPO4. Control experiment confirms that there exists a diffusion of Fe2 + and Mn2 + when LiMnPO4 contacts with LiFePO4 at high temperature. The obtained LiMn0.7Fe0.3PO4-C cathode material has a capacity of 140 mAh/g and good rate performance.