1results about How to "Control roughness" patented technology

The present application belongs to the field of batteries. The present application provides a kind of pole piece for improving surface flatness, its preparation method and battery, the preparation method includes that the coating layer of pole piece has formed is carried out re-coating, the mode of re-coating is gravure coating, control the particle size of substance in slurry used in re-coating is less than the particle size of substance in the coating layer that has formed, then carries out isostatic pressing treatment, forms re-coating layer.The specific re-coating layer formed by isostatic pressing treatment of the present application can prevent the generation of internal and surface defects of pole piece caused by roll pressing, improve the surface roughness and thickness uniformity of pole piece, effectively improve the surface flatness of pole piece and reduce interface impedance, optimize the solid-solid contact state and effect of electrode active material and solid electrolyte in pole piece, and further improve the cycle stability of battery.