Patent ID: 8016896
Filing Date: 2011-09-13
Classification: C04B,H01M,Y02E,Y10T

Abstract:
1. A process for producing a separator for an electrochemical cell, the separator comprising (A) a flexible perforate support, (B) a porous first ceramic material which fills the perforations in the support and which wherein (C) an electrolyte-contactable pore surface of the first porous ceramic material is covered with fine particles of a further material to extend the use life, the average size of the fine particles being in the range from 0.5 to 30% of the average pore size of the ceramic material, wherein the process comprises: (a) applying a dispersion as a thin layer onto and into a woven and/or nonwoven, the dispersion comprising: (b) solidifying the dispersion at a temperature from 100° C. to 680° C. to form the separator.