Ferric manganese phosphate precursor and preparation method thereof, and lithium iron manganese phosphate positive electrode material and preparation method thereof

The invention provides an iron manganese phosphate precursor and a preparation method thereof, and a lithium iron manganese phosphate positive electrode material and a preparation method thereof. The manganese iron phosphate precursor is a solid solution mixture formed by manganese phosphate and iron phosphate, the general formula of the manganese iron phosphate precursor is (Mn (PO4) 2/3) X (FePO4) 1-X, X is larger than or equal to 0.1 and smaller than or equal to 0.7, and the manganese iron phosphate precursor has the advantages of being safe, good in repeatability and the like and is used for overcoming the defects that the carbon coating effect is poor, the powder resistivity is high, manganese is dissolved out, and the batch stability is poor. The lithium manganese iron phosphate positive electrode material prepared from the manganese iron phosphate precursor can effectively improve the battery capacity, rate and other performances. 本发明提供一种磷酸锰铁前驱体和制备方法及一种磷酸锰铁锂正极材料和制备方法。该磷酸锰铁前驱体为磷酸錳和磷酸铁形成的固溶体混合物，其通式为(Mn(P