Treatment method of nickel cobalt lithium manganate positive electrode material

Abstract

The invention relates to a treatment method of a nickel cobalt lithium manganate positive electrode material, specifically comprising the following steps: (1) calcining a nickel cobalt manganese positive electrode material at 300-600 DEG C to obtain a calcined nickel cobalt manganese positive electrode material; (2) preparing a dilute sulfuric acid solution, adding the dilute sulfuric acid solution into the calcined nickel cobalt manganese positive electrode material in the step (1), heating to 90-100 DEG C, and reacting for 2 hours to obtain a low-manganese solution and leaching residues; and(3) treating the low-manganese solution by using a low-manganese line treatment method, and treating the leaching residues by using a high-manganese line treatment method. According to the treatmentmethod of the nickel cobalt lithium manganese positive electrode material, the problems of environmental pollution, low recovery rate, more waste of useful components in a nickel cobalt lithium manganese battery and low resource utilization rate in the treatment method in the prior art are solved, the environment-friendly production is realized, and the resource recycling effect is improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a treatment method for nickel-cobalt lithium manganese oxide cathode material. Background technique [0002] Nickel-cobalt lithium manganese oxide is one of the key materials of lithium-ion batteries. Lithium cobalt oxide is currently the most widely used battery material, but cobalt resources are increasingly scarce and expensive, and there are safety hazards in the use of lithium cobalt oxide batteries. Lithium cobalt manganese oxide replaces more than two-thirds of the cobalt in lithium cobalt oxide with relatively cheap nickel and manganese. The cost advantage is very obvious. Compared with other lithium ion battery cathode materials lithium manganese oxide and lithium iron phosphate, nickel Lithium cobalt manganese oxide material and lithium cobalt oxide are very close in terms of electrochemical performance and processing performance, making nickel cobalt lith...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems mentioned in the background technology, the present invention proposes a treatment method of nickel-cobalt lithium manganese oxide positive electrode material, which solves the environmental problems existing in the treatment methods of the prior art. Pollution, low recovery rate, waste of useful components in nickel-cobalt-lithium manganese oxide batteries, and low utilization rate of resources have been achieved, and environmental protection production has been realized, and the effect of resource recycling and utilization has been improved.