Preparation method of spinel lithium manganate positive electrode material

The invention discloses a preparation method of a spinel lithium manganate positive electrode material. The preparation method is characterized by comprising the following steps: (1) under the protection of an inert atmosphere, uniformly mixing manganese oxide and metal lithium, sufficiently soaking in an electrolyte, and standing for at least 0.5 hour; (2) filtering to obtain a solid-phase material, washing the residual electrolyte, and drying; and (3) sintering at high temperature to obtain the spinel lithium manganate positive electrode material. According to the method, lithium ions are embedded into the manganese oxide material through electrolyte short circuit, uniform dispersion of the lithium ions is achieved, the prepared lithium manganate is high in purity and good in crystallinephase, meanwhile, a uniform product can be obtained through one-time sintering, and the energy consumption in the production process is low. 本发明公开了一种尖晶石锰酸锂正极材料的制备方法，其特征在于，包括以下步骤：(1)在惰性气氛保护下，将氧化锰和金属锂混合均匀后，充分浸泡在电解液中静置至少0.5小时；(