1results about How to "Improve sagging" patented technology

The application belongs to the technical field of battery separators, and particularly relates to a battery separator and a preparation method thereof. The battery separator comprises a separator base material and a support layer, wherein the support layer comprises at least nanocellulose and hexagonal flake magnesium hydroxide, and the mass ratio of the nanocellulose and the hexagonal flake magnesium hydroxide is 1-10:20-100. The hexagonal flake morphology of the magnesium hydroxide is easy to stack to form a flake layer structure on the surface of the base material, thereby supporting the base material. The fiber skeleton structure of the nanocellulose plays a connecting role, and keeps the interface stability of the coating while avoiding the risk of coating cracking and peeling caused by excessive rigidity of the coating.