NANOCOMPOSITE POLYMER SEPARATOR WITH IMPROVED SAFETY CHARACTERISTICS AND METHOD OF MANUFACTURING THEREOF Russian patent published in 2025 - IPC H01M10/525 H01M50/417 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, specifically to a nanocomposite polymer separator with improved safety characteristics and a method for manufacturing thereof, which can be used in lithium-ion storage batteries. Technical result is achieved due to the fact that the lithium-ion battery separator manufacturing method includes the following stages: 1) compounding the polymer and the hydrophobic filler during dry mixing, 2) extruding the compounded mixture, wherein a cast film is obtained and 3) stretching the cast film to produce a porous membrane, wherein the hydrophobic filler is a nanostructured metal oxide which is selected from aluminium oxide, ZrO₂, MgO and ZnO and mixtures thereof, obtained after hydrophobic surface treatment, and where the amount of hydrophobic filler is in range from 5 wt.% to 40 wt.% based on the total weight of the polymer and filler.

EFFECT: high thermal stability, mechanical strength and stability of dimensions of the separator, which meets safety requirements, is the technical result.

12 cl, 12 dwg, 7 tbl