Patent ID: 7892673
Filing Date: 2011-02-22
Classification: D06M,H01M,Y02E,Y10T

Abstract:
1. A process for producing a separator comprising a flexible nonwoven having a porous inorganic coating on and in said nonwoven, and wherein the material of said nonwoven is selected from non-woven, nonelectroconductive polymeric fibers, and wherein said nonwoven has a thickness of less than 30 μm, a porosity of more than 50% and a pore radius distribution, in which at least 50% of the pores have a pore radius from 75 to 150 μm, which process comprises: applying to the nonwoven a suspension comprising oxide particles and at least one sol, and heating one or more times to solidify said suspension on and in said nonwoven, wherein the separator comprises.