METHOD FOR PREPARING PRECURSOR OF NICKEL-COBALT-ALUMINUM TERNARY CATHODE MATERIAL, CATHODE PLATE, AND LITHIUM ION BATTERY

摘要

The present application provides a method for preparing precursor of nickel-cobalt-aluminum ternary cathode material, comprising steps of: 1) mixing a nickel salt solution, a cobalt salt solution, and an aluminum salt solution at a molar ratio of Ni:Co:Al=(0.6-0.9):(0.05-0.3):(0.01-0.1) to obtain a first mixture; 2) adding the first mixture into ammonia water, stirring, and adjusting pH by an alkaline solution to obtain a second mixture with a pH≥12; 3) adding an appropriate amount of additive to the second mixture, stirring, and ageing for 10-24 h to obtain a colloid; 4) washing the colloid and concentrating by centrifugation to obtain a gel; 5) drying the gel at 200-300° C. for 4-8 h, and sintering at 1100-1600° C. for 3-6 h to obtain a precursor of nickel-cobalt-aluminum ternary cathode material. The present application also provides a cathode plate and a lithium ion battery including the same.