Evonik Degussa Gmbh

Degussa Aktiengesellschaft

Evonik Operations Gmbh

Jens Vetter

Christian Hying

Volker Hennige

Gerhard Hoerpel

Petr Novak

Gerhard Hörpel

A separator for an electrochemical cell, comprising (A) a flexible perforate support, and (B) a porous ceramic material which fills the perforations in the support and is suitable for receiving an ion-conducting electrolyte, wherein the porous ceramic material comprises a first porous layer which is characterized by an average pore size and also at least one second porous layer for contacting with an electrode, the second porous layer having an average pore size which is smaller than the average pore size of the first porous layer.

Asymetrical pore structure separator for an electrochemical cell

A separator for an electrochemical cell, comprising (A) a flexible perforate support, (B) a porous first ceramic material which fills the perforations in the support and which (i) has a pore structure which is characterized by an average pore size, and (ii) is suitable for receiving an ion-conducting electrolyte, wherein (C) the 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% and preferably in the range from 1 to 15% of the average pore size of the ceramic material.

Separator with long-term stability for an electrochemical cell

Separator provided with asymmetrical pore structures for an electrochemical cell

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Wuerenlingen, Switzerland

Jens Vetter