Preparation process of cathode slurry of shunting type lithium battery

Abstract

The invention discloses a preparation process of cathode slurry of a shunting type lithium battery. The preparation process comprises the following steps: (1) weighing graphene, nano-silicon, a conducting agent and polyvinyl alcohol dry powder in a mass ratio of (85-90) to (3-8) to (3-6) to (6-10), adding graphene, nano-silicon, the conducting agent and 50% of the polyvinyl alcohol dry powder intoa stirring tank, and starting the rotation and revolution of the stirring tank A for primary stirring; (2) adding 20%-40% of pure water with a solid content of 45%-50%, and carrying out secondary stirring; (3) adding the 50% of the rest polyvinyl alcohol dry powder, and carrying out third stirring; (4) adding 40%-80% of rest pure water, and carrying out fourth stirring; and (5) standing for a period of time, taking out 50% of volume of a mixed dispersion system at an upper layer, carrying out ultrasonic dispersion, putting the mixed dispersion system into a stirring tank B with the same specification of the stirring tank A, and circularly applying the 50% of volume of the rest mixed dispersion system in the stirring tank A to the process in the step (1).

Description

technical field [0001] The invention relates to the technical field of preparation of negative electrode materials for lithium batteries, in particular to a preparation process for negative electrode slurry of shunt lithium batteries. Background technique [0002] The slurry mixing and dispersion process of lithium batteries has a great influence on the entire production process of lithium batteries, and is the most important link in the entire production process. The positive electrode slurry of lithium battery is composed of binder, conductive agent, positive electrode material, etc.; the negative electrode slurry is composed of binder, graphite carbon powder, etc. The preparation of positive and negative electrode slurries includes a series of processes such as mixing, dissolving, and dispersing between liquid and liquid, liquid and solid materials. Moreover, changes in temperature, viscosity, and environment during this process will affect the dispersion and uniformity ...

AI Technical Summary

Problems solved by technology

Moreover, in this process, changes in temperature, viscosity, environment, etc. will affect the dispersion and uniformity of particles in the positive and negative electrode slurry, and then affect the movement of lithium ions between the two electrodes of the battery.

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