What are the slurry properties of lithium-ion power cells?

Pulp composition

Lithium-ion power battery slurry is basically composed of active substances, conductive agents, binders, solvents.

Pulp properties

As the material of the coating process, the properties of the slurry directly affect the coating quality. Through the composition of the slurry we can know that the slurry belongs to the solid liquid two-phase fluid. The main control points for slurry quality in production include viscosity, solid content, density, fineness and PH value. The uniform consistency of the slurry is very important for the coating process. The uniform consistency of the slurry can be obtained by detecting the quality control points of the slurry in different regions.

Since the viscosity of the slurry is related to temperature, stirring speed, settling time, etc., according to the definition of Newtonian fluid and non-Newtonian fluid, we classify the slurry as non-Newtonian fluid. After the slurry is stirred relatively evenly, the viscosity of the slurry gradually decreases with the increase of the mixing time, and finally it tends to a stable value. According to the relevant literature, under the ratio and homogenization of lithium ion battery slurry, there is a decrease in viscosity with the increase of shear rate, that is, shear dilution. To sum up, we attribute the lithium ion battery slurry to a non-Newtonian fluid with shear dilution. Because the fluid characteristics of the slurry vary under different conditions according to different materials, different proportions and different uniform conditions, this paper only introduces the fluid characteristics of the slurry under different conditions.

Density Hey: Lithium battery slurry density is generally 1400 ~ 2000 kg/m3

Viscosity μ: Lithium battery slurry is generally controlled at 1 ~ 10 Pa · s according to different process conditions

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