Factors affecting the fluidity of electrode paste
The fluidity of electrode paste refers to its ability to freely flow under certain conditions, which is crucial for the mixing, forming, and sintering processes of electrode paste. The fluidity of electrode paste is influenced by various factors, mainly including the following points:
Particle size and particle size distribution
The smaller the particle size of carbon powder and other raw materials in the electrode paste, the larger the surface area, and the better the fluidity of the electrode paste. A reasonable particle size distribution can reduce the internal friction of electrode paste, making it easier to mix and apply.
Types and quality of toner
The type of carbon powder (such as graphite powder, activated carbon, etc.) and quality (purity, surface treatment, etc.) also have a significant impact on the fluidity of electrode paste. Different types of carbon powder have different adsorption and hydrophilicity, which can affect the viscosity and fluidity of electrode paste.
Types and dosages of additives
Adding an appropriate amount of additives (such as plasticizers, lubricants, etc.) to the electrode paste can improve its fluidity. Plasticizers can increase the plasticity of the paste, while lubricants can reduce the frictional resistance between particles, both of which help improve the fluidity of the electrode paste.
temperature and humidity
The temperature and humidity of the environment can also affect the fluidity of the electrode paste. High temperature and high humidity environments may make the electrode paste too thin, reducing its fluidity; Low temperature and low humidity environments may cause the electrode paste to be too thick, which is not conducive to flow.
Mixing time
The interaction between raw materials during the mixing process of electrode paste can affect its fluidity. Short mixing time may lead to uneven distribution of raw materials and affect fluidity; If the mixing time is too long, it may lead to excessive solidification of the paste, which also affects its fluidity.
Pressure and shear force
During the molding process, the applied pressure and shear force can affect the structure and fluidity of the electrode paste. Appropriate pressure and shear force can help to make the paste fill the mold more tightly and evenly, while unreasonable pressure and shear force may cause damage to the structure of the paste and affect its fluidity.
