SEPARATOR FILM COATING MATERIAL FOR SECONDARY BATTERY AND MANUFACTURING METHOD OF SEPARATOR FILM USING THIS AND SEPARATOR FILM THEREFROM AND SECONDARY BATTERY USING THE SAME

摘要

In the method for manufacturing a secondary battery separator according to the present invention, a polyvinylidene fluoride-hexafluoropropylene copolymer (PVdF-HFP copolymer) is dissolved in a liquid phase using an acetone solvent in a separator substrate having a microporous structure, and ethanol is added thereto. Mixing and applying a nano polymer particles in a liquid mixture prepared by stirring and dispersing, the liquid polymer composite is acetone solvent: PVdF-HFP copolymer: ethanol: nano inorganic particles 1 ~ 1.2: 0.01 ~ 0.04: 0.01 to 0.05: 0.01 to 0.1 by weight ratio, the liquid polymer composite is applied to the separator base material is heated to evaporate the acetone solvent and then heat is added to evaporate ethanol to obtain a secondary battery separator by Its thermal characteristics and safety improve battery performance and lifespan and improve the impregnation capacity of electrolytes. Jigwa has the advantage of producing a high-power battery allows.;Secondary Battery, Microporous Separator, Coating Layer, Nano Inorganic Particles