Method for treating spinel lithium-rich lithium manganate doped with divalent cations by using acidic salt

The invention relates to a method for treating spinel lithium-rich lithium manganate doped with divalent cations by using an acidic salt. The method comprises the following steps: mixing anode material powder of spinel lithium-rich lithium manganate doped with divalent cations (Mg2 +, Zn2 +, Ca2 +, Co2 +, Ni2 + or Cu2 +) with the acidic salt according to a molar ratio of 1:0.0010 to 0.090, adding a wet grinding medium to prepare a precursor 1, and preparing a precursor 3 by wet grinding, washing and drying steps; and sintering the precursor 3 to prepare modified spinel lithium-rich lithium manganate. According to the invention, the costs of the raw materials are relatively low, and the high current discharge performance of a sample is obviously improved, thereby laying a good foundation for industrialization.