Progress on lithium manganese iron phosphate cathode materials

Lithium manganese iron phosphate (LMFP) cathode material, has been extensively researched. This paper systematically summarizes and introduces the Delithiation/lithiation mechanism of lithium iron phosphate and several mainstream research methods, including high-temperature solid-phase method, co-precipitation method and precursor method, elaborating the electrochemical properties of LMFPs with different Fe-Mn ratios by citing detailed cases. Meanwhile, this paper provides a comprehensive overview of the current research methods and research status of LMFP cathode materials focusing on carbon coating, ion doping and composite doping. Through several synthesis cases, the intrinsic correlation existing between different methods have been discussed in-depth in order to fully reflect the enhancement of the improved methods on the specific capacity and cycling performance of LMFP at high discharge multiplicity.