Coating Basics
Purpose: To uniformly coat a fluid slurry onto the surface of a metal foil, dry it, and produce a battery electrode
Principle: The coating roller rotates to carry the slurry, and the amount of slurry transferred is adjusted by adjusting the gap between the doctor blade and the roller. The relative rotation of the back roller and the coating roller is used to transfer the slurry onto the substrate. Subsequently, the solvent in the slurry is evaporated through drying and heating, causing the solid matter to adhere to the substrate.
Note: Taking transfer coating as an example
Blade Coating-1
The most commonly used coating method
Blade Coating-2
The most commonly used coating method, Controllable thickness
Dip Coating
Rolling
Suitable for situations with very few materials, with poor coating uniformity and poor battery consistency
Common current collectors
There are many types of current collectors, and their selection depends on different material systems and applications.
Selection of Current Collectors for Supercapacitors
There are many types of current collectors, which need to be selected based on different material systems and applications. Taking supercapacitors as an example
Common issues
Using thicker foil material to increase strength
Screening the slurry
- difficult to level the slurry on the surface of nickel foam
- high viscosity of the slurry prevents effective infiltration
high viscosity of the slurry prevents effective infiltration
- difficult to control the uniformity of coating
- Poor bonding and easy shedding occur in areas with heavy coating weight
Adjust the solid content or formula of the slurry to reduce its viscosity
Produce the sheets separately first, and then transfer and compress them together with the nickel foam
Company introduction
Welcome to Canrd Company (Canrd stands for “Creating Avenues for New Research Development”，website: www.canrd.com ). We specialized in:
- Electrochemical experiment consumables, including coin cell cases, cathodes, anodes, electrodes, electrolytes, and various other materials.
- Battery cell research and development outsourcing, offering Custom-made electrodes, dry cells, finished battery cells, and battery cell testing.
- Test line equipment, such as coin cell equipment lines, pouch cell test lines, cylindrical cell test lines, and more.
We have strong research and development capabilities.If you are interested, please feel free to contact us at any time.
Phone：+86 19867737979
Email：contact@canrd.com
Wechat：contactcanrd
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