Preparation method of LiMn1-xMgxPO4/C anode material

The invention provides a preparation method of a LiMn1-xMgxPO4/C anode material. The method comprises the following steps: (1) slowly dropwise adding phosphoric acid or a phosphate solution into a lithium salt solution A in an inert atmosphere, and continuously stirring, so as to obtain suspension liquid C; (2) slowly pouring a manganese salt and magnesium salt mixed solution D into the suspensionliquid C, uniformly stirring and dispersing, carrying out microwave reaction, cooling, and carrying out centrifugation, washing, vacuum drying and grinding, so as to obtain manganese magnesium lithium phosphate precursor powder; (3) uniformly mixing the manganese magnesium lithium phosphate precursor powder with a carbon source, carrying out ball milling, uniformly mixing, roasting in the inert atmosphere, and grinding, so as to obtain the LiMn1-xMgxPO4/C anode material, wherein x is equal to 0.01-0.15. The method is simple in process, short in time and low in cost, the prepared LiMn1-xMgxPO4/C anode material is cont