Manganese nickel cobalt composite lithium-inserting oxide and manufacturing method thereof

The invention is lithium ion cell positive material and the manganese-nickel-cobalt compound embedded lithium oxide and the manufacturing method, the chemical formula is: Li0.7-1.0MnxNiyCozO2, x+y+z=1, x=0.2-0.5, x/y=0.8-1.2, z/x=0.1-1, the crystal structure is hexagonal system, the manufacturing method is: the mol proportion is Mn:Ni:Co=1:0.8-1.2:0.1-1, the compound liquid of the Mn2+, Ni2+, and Co2+ is confected, then they are heated, adds in excess alkali, the compound hydroxide is deposited and separated; the compound oxide can be acquired through baking and decomposition; the lithium material and the manganese-nickel-cobalt compound oxide is pressed after blended according to proportion of Li:(Mn+Ni+Co)=0.7-1.0:1, they are baked in oxide atmosphere under temperature of 700-1000oC for 6-36 hours, then they are cooled and crushed into the product. The process is simple, the capacity of the lithium ion cell positive material is large, the circular performance is good, and the cost is low.