Preparation method of anode slurry of lithium ion battery

Abstract

The invention belongs to the technical field of manufacturing of lithium ion batteries and especially relates to a preparation method of anode slurry of a lithium ion battery. The preparation method comprises the following steps: 1) respectively weighting anode active materials, adhesives and conductive additive CNT powder in proportion; 2) mixing a part of anode active materials with all the conductive additive CNT powder, thereby obtaining mixed powder; 3) adding the adhesives and a part of solvent into the mixed powder; 4) kneading and stirring the mixture obtained in the step 3), thereby obtaining primary slurry; and 5) adding the remained solvent, the remained anode active materials and the remained adhesives into the primary slurry, and uniformly stirring, thereby obtaining the anode slurry. Compared with the prior art, the preparation method provided by the invention has the advantages that: the primary slurry is high in solid content in the kneading process, so that a huge mechanical force can be applied to the primary slurry by a stirring paddle; and meanwhile, the added anode active materials have a function of an abrasive material; and the force applied by a stirrer is finally applied to CNT aggregates, so that a better CNT scattering effect is obtained.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery manufacturing, and more specifically relates to a simple and easy preparation method for lithium-ion battery cathode slurry that can obtain better CNT dispersion effect. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, high reliability, good processability and no environmental pollution, and have been widely used in various portable electronic devices (such as mobile phones, notebooks, MP4, etc.). [0003] A lithium-ion battery generally includes a positive pole piece, a negative pole piece, and a separator spaced between the positive pole piece and the negative pole piece. The positive electrode sheet includes a positive electrode collector and a positive electrode membrane coated on the positive electrode collector, and the negative electrode sheet includes a negative electrode collector and a negative electrode membrane coated on the ne...

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Problems solved by technology

[0009] The purpose of the present invention is to: aim at the deficiencies of the prior art, and provide a kind of preparation method that can obtain better CNT dispersion effect, and simple and easy lithium-ion battery anode slurry, to overcome the lithium ion in the prior art CNTs in battery cathode slurry are easy to agglomerate and cannot be dispersed evenly

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