Patent ID: 7790321
Filing Date: 2010-09-07
Classification: H01M,Y02E,Y10T

Abstract:
1. A separator especially for lithium high energy batteries, comprising a sheetlike flexible substrate having a multiplicity of openings and having a porous inorganic coating on and in said substrate, the material of said substrate being selected from a nonwoven of electrically nonconductive polymeric fibers, wherein the separator has a weight of less than 50 g/m 2 and a thickness of less than 35 μm and in that the porous inorganic coating is constructed from oxide particles having a primary particle size of from 5 to 100 nm and adhered via SiO 2 or ZrO 2 , wherein the coating is prepared from a sol or suspension comprising a solvent which comprises a mixture of at least one alcohol and at least one hydrocarbon.