Lithium battery high-nickel ternary positive electrode slurry and preparation method thereof

Abstract

The invention discloses a lithium battery high-nickel ternary positive electrode slurry and a preparation method thereof. The positive electrode slurry is composed of a positive electrode active material, a conductive agent, an adhesive, an organic weak acid and an organic solvent. The preparation method comprises the following steps: S1, adding the positive electrode active material, the conductive agent and the adhesive into a stirrer, and uniformly performing mixing; S2, adding 50-70wt% of an organic solvent into S1, and performing stirring to obtain a coarse pulping material A; S3, addingthe residual solvent into S2, performing stirring, and performing stirring at a high speed to obtain a crude product B; S4, transferring the coarse slurry B prepared in the S3 into a ball mill, addingorganic weak acid, and carrying out ball milling to obtain ternary positive electrode slurry C. According to the preparation method, the problem that the high-nickel ternary material absorbs water toform jelly in the homogenizing process can be effectively solved, and the processability is improved; meanwhile, the preparation method can effectively shorten the preparation time of the slurry andimprove the production efficiency, and the prepared slurry is uniform in dispersion, stable in storage, beneficial to coating and easy to realize large-batch production.

Description

Technical field [0001] The invention belongs to the technical field of lithium ion batteries, and specifically relates to a lithium battery high nickel ternary positive electrode slurry and a preparation method thereof. Background technique [0002] With the promotion of energy saving and emission reduction, new energy vehicles are gradually becoming popular. To prepare new energy vehicles, power batteries are essential. Lithium-ion batteries have outstanding advantages such as high energy density, environmental friendliness, no memory effect, long cycle life, low self-discharge, and environmental protection. The materials used among them have also become the focus of research, especially positive electrode active materials. [0003] Currently, lithium battery cathode materials that have been commercially used include lithium cobalt oxide, lithium manganese oxide, lithium iron phosphate, and nickel cobalt manganese ternary materials. Lithium cobaltate is currently the most matur...

AI Technical Summary

Problems solved by technology

[0005] In view of the problems existing in the prior art, the object of the present invention is to provide a high-nickel ternary positive electrode slurry for lithium batteries and a preparation method thereof, aiming at solving the problem of water absorption into a jelly-like state during the homogenization process of high-nickel ternary materials, and improving The dispersion and stability of the slurry, so as to ensure the preparation of high-nickel ternary lithium batteries with excellent performance