Negative electrode material slurry lithium ion battery

What are lithium ion electrode slurries?

Typically, slurries for lithium-ion electrodes consist of a solvent, the anode or cathode active material, carbon black to ensure the electrical conductivity and a binder for the cohesion between the particles and the adhesion of the electrode layer to the current collector respectively.

What are the rheological characteristics of electrode slurry?

Viscosity is the most influential rheological characteristic of electrode slurry, and it is affected by a variety of characteristics (e.g., particle size, particle shape, roughness, temperature, fluid force, and solid content) [64, 69]. When CFD is employed for simulating the mixing process, the slurry viscosity should be determined first.

How does slurry coating affect the conductive properties of electrodes?

As a result, the slurry cannot be stably and evenly coated on the fluid collecting surface during the subsequent coating process, which directly affects the microstructure of the electrode and the distribution characteristics of the material, thus further affecting the mechanical stability and conductive properties of the electrode structure.

Does the mixing process of electrode slurry affect the internal resistance?

In this study, the relation between the mixing process of electrode-slurry and the internal resistance of the composite electrode was investigated in combination with the characterization of the electrode-slurries by the rheological analysis and the alternating current (AC) impedance spectroscopy.

Are electrode slurries Newtonian?

Electrode slurries are not Newtonian, and may show shear thinning and yield stress behavior. Maillard et al. observed yield stress fluids in a blade coater and found that a uniform shear region was formed between the material built up behind the blade and material close to the substrate.

Is electrode slurry a non-Newtonian fluid?

The rheological analysis indicated a shear rate dependence of the steady-flow viscosity of the electrode-slurry. Since the electrode-slurry is a solid dispersion system, it was treated as a non-Newtonian fluid. 28, 29 Table 1 shows the thixotropic index (TI) determined from the steady-flow viscosity at 0.01 s −1 and 1 s −1.