Dynamic Pressure Regulation for Close Coupled Atomization Nozzle Systems
Dynamic regulation of gas supply pressure preserves aspiration differential at close-coupled nozzles, eliminating melt freeze-off and controlling powder size.
Slurry Spray
Meaning
Liquid deposition techniques atomize a mixture of active material, binder, and solvent into fine droplets to create a uniform coating on a substrate. The implementation of slurry spray processes enables the continuous production of thin, homogeneous electrodes for advanced batteries. This atomization technique is particularly useful for applying thin layers of solid electrolyte or cathode materials onto fragile substrates.
By utilizing a continuous roll to roll feed system, the manufacturing line maintains high throughput while ensuring consistent thickness.
Coating Process
Pressurized nozzles or rotating disks break the liquid mixture into a fine mist that settles evenly onto the current collector foil. Controlling the droplet size is essential for avoiding the formation of large agglomerates that would cause surface defects in the dried electrode. This method allows for precise adjustment of the coating thickness across the entire width of the foil.
Dryer Integration
Rapid evaporation of the solvent occurs as the sprayed mist passes through a heated drying zone or contacts a preheated substrate. This immediate drying prevents the migration of binders toward the surface, which is a common problem in thick wet coatings. By locking the distribution of materials in place, the process ensures a highly uniform electrode structure.
Electrode Quality
High adhesion of the deposited layer to the metal foil is achieved because the fine droplets wet the surface thoroughly. This intimate contact reduces contact resistance and improves the high rate performance of the resulting battery cell. Using this technique is a reliable method for manufacturing high quality electrodes with minimal defects.