Preparation method of magnesium nickel cobalt aluminum oxide for lithium ion power battery and product thereof

The invention relates to a preparation method of a magnesium nickel cobalt aluminum oxide for a lithium ion power battery. The magnesium nickel cobalt aluminum oxide is prepared according to a co-precipitation method. The preparation method comprises the following steps of: (1) reaction solution preparation; (2) precipitation reaction; (3) impurity removal; (4) drying; and (5) reconstruction and curing; a certain molar concentration of a nickel salt, a cobalt salt, a magnesium salt and an aluminum acid salt are matched according to a certain proportion, chemical precipitation reaction is carried out in a non-magnetic reaction kettle compatible with high radial cutting force and axial turbulence and provided with a multi-dimensional moving system resistant to flow in conditions of a certain temperature, flow quantity, PH value, stirring speed and the like and in mixture system existing with a chelating agent and a system existing with the chelating agent and a precipitator so as to form an atomic-scale uniform mixture of nickel hydroxide, cobalt hydroxide, aluminum hydroxide and magnesium hydroxide for precipitation, and then the atomic-scale uniform mixture is dried at a low temperature, and reconstructed and curved at a high temperature to form the magnesium nickel cobalt aluminum oxide. The molecular formula of the magnesium nickel cobalt aluminum oxide is CoMbALMgO