| abstract |
A method for preparing a lithium-nickel-manganese-cobalt composite oxide used as a positive electrode material for a lithium ion battery, wherein a mixture containing a lithium compound and nickel-manganese-cobalt hydroxide is subjected to a first stage firing. And subjecting to the second stage firing, further comprising adding a binder and / or a binder solution after the first stage firing, and the binder and / or the binder solution and the first stage firing. A method is provided wherein the mixture with the product is fired in the second stage firing. The tap density and volume specific capacity of the positive electrode material lithium-nickel-manganese-cobalt composite oxide prepared by the method of the present invention increase to 2.4 g / cm 3 and 416.4 mAh / cm 3 , respectively. In addition, the positive electrode material lithium-nickel-manganese-cobalt composite oxide prepared by the method of the present invention has a high specific capacity and good cycle stability. [Selection] Figure 1 |