SEPARATOR WITH LONG-TERM STABILITY FOR AN ELECTROCHEMICAL CELL

摘要

The invention relates to a separator for an electrochemical cell, comprising (A) a flexible carrier provided with holes, and (B) a porous first ceramic material which is used to fill the holes of the carrier. The ceramic material (i) has a porous structure which is characterised by an average pore size, and (ii) is suitable for receiving an electrolyte for ionic conduction. The inventive separator is characterised in that (C) the porous surface of the first porous ceramic material - which can be brought into contact with the electrolyte - is covered with fine particles of another material in order to increase the service life of the separator. The average particle size of the fine particles is between 0.5 and 30 %, preferably between 1 and 15 %, of the average pore size of the ceramic material.