China Petroleum & Chemical Corporation Applies for Patent on Advanced Battery Separator for Lithium-Sulphur Batteries

[Patent for Separator Material by China Petroleum & Chemical Corporation] Application for a patent titled "A Battery Separator, Its Preparation Method, and a Lithium-Sulphur Battery Containing the Separator." Application Publication Number: CN119581794A

Abstract: This invention discloses a battery separator, its preparation method, and a lithium-sulphur battery containing the separator. The battery separator of this invention comprises a polymer substrate film and a composite layer distributed on one side of the polymer substrate film. The composite layer includes heteroatom-doped molecular sieves and conductive carbon materials, with the heteroatoms located in the crystal framework of the molecular sieves. The battery separator of this invention effectively suppresses the shuttle effect of polysulphides in lithium-sulphur batteries through the dual effects of physical confinement and chemical adsorption, reducing the loss of active material and improving the cycling performance and capacity of the battery.