Regarding high coating edges in the lithium-ion battery coating proces
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Electrode coating is a crucial part of the manufacturing process, significantly influencing the final microstructure. Therefore, it is a key area for the application of advanced metrology. One of the essential parameters in coating production is the achieved coating thickness. This is vital for electrode performance, as thicker electrodes contain more active materials, which increases energy density.

However, thicker electrodes also have greater diffusion distances, which can lower power output and potentially cause uneven responses across the electrode, leading to faster degradation.

On the other hand, these thicker parts can be damaged during the calendering process due to the unbalanced pressing force and deformation between the edge and the center of the coating lane.

Many coating defects are related to the edges of the coating. This is due to several factors:

The affect of viscosity of the slurry is approximately 80% higher at the edges.
– The height of the coating edge is highly dependent on factors such as slurry flow, the coating gap between the slot die and substrate, coating speed, and surface tension.

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