Evonik Degussa Gmbh

Degussa Aktiengesellschaft

Creavis Gesellschaft Fuer Technologie Und Innovation Mbh

Evonik Operations Gmbh

Litarion Gmbh

Christian Hying

Volker Hennige

Gerhard Hoerpel

Bernd Penth

Sven Augustin

Petr Novak

Gerhard Hörpel

Jens Vetter

Carsten Jost

Rolf-Walter Terwonne

Edwin Nun

Friedrich Georg Schmidt

Matthias Pascaly

Michael Holzapfel

David Grzenia

Anna Prodi-Schwab

Markus Oles

Mark Duda

Andreas Gutsch

Patrik Stenner

Oliver Conradi

Kira Khaletskaya

Gerhard H&ouml;rpel

Adolf Kuehnle

Dirk Poppe

Bernhard Schleich

Marie-Theres Wilkes

Hannelore Armoneit

Gerhard Geipel

Sigrid Banken

Norbert Kern

Christian Herkt-Bruns

Eckart Berendes

Hans-Jürgen Nettelnbreker

Alexander Paasche

Tobias Stadtmüller

Bastian Matthias Brugger

Petr Novák

Michael Kube

Witold Friedemann Rex

Nicole Decker

Henrik Hahn

Frank Löffler

Elisabeth Gorman

Jessica Antoni

Huong Klink-tran

Meike Dahlhues

Sabrina Juretzka

Frank LÖFFFLER

Decker Nicole

Witold Friedeman Rex

A composite body comprising a porous layer (1) made from oxide particles connected to one another and partially to a substrate, containing at least one oxide of the elements Al, Zr, Ti or Si, and comprising a further porous layer (2) at least on one side, having oxide particles connected to one another and partially to the layer (1) and containing at least one oxide of the elements Al, Zr, Ti or Si, wherein the oxide particles in the layer (1) have a greater average particle size (dis 0.5 to 4 μm) than the oxide particles in the layer (2) (dis 0.015 to 0.15 μm), characterised in that a polymer coating (PB) is provided on or above the layer (2), containing one or more polysiloxanes. A method for producing corresponding composite bodies and to the use thereof.

Composite body and use thereof in organophilic nanofiltration

The present invention provides a composite body having, on a porous substrate and in the interstices of the substrate that includes fibers, preferably of an electrically nonconductive material, a porous layer (1) composed of oxide particles bonded to one another and partly to the substrate that include at least one oxide selected from oxides of the elements Al, Zr, Ti and Si, preferably selected from AlO, ZrO, TiOand SiO, and having, at least on one side, a further porous layer (2) including oxide particles bonded to one another and partly to layer (1) that include at least one oxide selected from oxides of the elements Al, Zr, Ti and Si, preferably selected from AlO, ZrO, TiOand SiO, where the oxide particles present in layer (1) have a greater median particle size than the oxide particles present in layer (2), which is characterized in that the median particle size (d) of the oxide particles in layer (1) is from 0.5 to 4 &#x3bc;m and the median particle size (d) of the oxide particles in layer (2) is from 0.015 to 0.15 &#x3bc;m, preferably 0.04 to 0.06 &#x3bc;m, a process for producing corresponding composite bodies and for the use thereof, especially in gas separation.

Composite body

Robust separator, which has on a substrate and in the intermediate spaces of the substrate, which comprises fibres of an electrically nonconducting material, an electrically nonconductive coating of oxide particles which are adhesively bonded to one another and to the substrate by an inorganic adhesive and comprise at least one oxide, selected from AlO, ZrOand SiO, wherein polymer particles are also present in the ceramic coating in addition to the oxide particles of AlO, ZrOand/or SiO. These separators are particularly easy to handle, since they are mechanically very stable.

Separator with improved ease of handling

Robust separator which has, on a substrate and in the voids of the substrate, which comprises fibers of an electrically nonconductive material, an electrically nonconductive coating comprising oxide particles which are adhesively bonded to one another and to the substrate by an inorganic adhesive and comprise at least one oxide selected from AlO, ZrOand SiO, polymer particles also being present in the ceramic coating in addition to the oxide particles of AlO, ZrOand/or SiO. These separators have particularly good handling properties since they are mechanically very stable.

The present invention relates to a membrane comprising a flat, flexible substrate having a plurality of openings and having a porous inorganic coating situated on and in said substrate, the material of the substrate being selected from woven or non-woven, electrically non-conductive fibers, characterized in that the substrate comprises polyaramide fibers that are pure or connected to fibers of the further polymer or at least of one of these further polymers, wherein the fibers of at least one of said further polymers comprise a melting point that is lower than the decomposition point of the polyaramide fibers.

Ceramic membrane having support materials comprising polyaramid fibers and method for producing said membranes

The invention relates to a process for producing a separator comprising the steps of: providing a sheetlike porous substrate, a solvent, ceramic particles and an adhesion promoter; preparing a slip by mixing the solvent, the adhesion promoter and the ceramic particles; coating the substrate with the slip and thermally drying the coated substrate to obtain the separator. The problem addressed is that of specifying a process useful for producing separators having a higher ceramic content. The problem is solved when the solvent used is a mixture of water and at least one organic component; the adhesion promoter used is a mixture of silanes and at least one thermally crosslinkable acrylic polymer; the slip is admixed with a carboxylic acid preparation and also with a defoamer component free from silicone oil.

Separator comprising an organic-inorganic adhesion promoter

The invention relates to a separator filled with an electrolyte composition. The separator has a ceramic surface and the electrolyte composition comprises an ionic fluid. Filling with the electrolyte composition can take place, for example, by inserting the separator into a battery, e.g. into a lithium ion battery, which is filled with a corresponding electrolyte composition.

Use of a ceramic separator in lithium ion batteries, comprising an electrolyte containing ionic fluids

The present invention relates to electrical separators and to a process for making them. An electrical separator is a separator used in batteries and other arrangements in which electrodes have to be separated from each other while maintaining ion conductivity for example. The separator is preferably a thin porous insulating material possessing high ion permeability, good mechanical strength and long-term stability to the chemicals and solvents used in the system, for example in the electrolyte of the battery. In batteries, the separator should fully electrically insulate the cathode from the anode. Moreover, the separator has to be permanently elastic and to follow movements in the system, for example in the electrode pack in the course of charging and discharging. This object is achieved by an electrical separator according to the invention, comprising a sheetlike flexible substrate having a multiplicity of openings and having a coating on and in said substrate, said substrate being a polymeric nonwoven and said coating being a porous electrically insulating ceramic coating, said separator being characterized by a thickness of less than 80 &#x3bc;m.

Electric separator, method for the production and use thereof

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

Disclosed is a wallcovering assembly consisting of a base material and at least one ceramic coating/topcoat with or without an optional ceramic interlayer.

Ceramic composite wall covering

The present invention relates to membranes and to a process for making them. The membranes according to the invention comprise a sheetlike flexible substrate having a multiplicity of openings and having a coating on and in said substrate, the material of said substrate being selected from nonwovens of polymeric fibers, said nonwovens having a porosity of more than 50% and said coating being a porous ceramic coating, said substrate preferably being from 10 to 200 &#x3bc;m in thickness. Such membranes provide a distinctly higher flux than conventional membranes. The membranes are useful as separators for batteries or as a microfiltration membrane.

Ceramic membrane based on a substrate containing polymer or natural fibres, method for the production and use thereof

The invention relates to an electrolyte separator system comprising an ionic liquid, a conductive salt and a ceramic separator, and the use of the electrolyte separator system according to the invention in electrochemical energy storage systems, in particular of lithium metal and lithium ion batteries.

Film former-free electrolyte/separator system and use thereof in electrochemical energy accumulators

Separator-electrode assemblies (SEAs) comprise a porous electrode useful as a positive or negative electrode, in a lithium battery and a separator layer applied to this electrode, the separator layer being an inorganic separator layer comprising at least two fractions of metal oxide particles different from each other in their average particle size and/or in the metal, and the electrode having active mass particles are bonded together and to the current collector by inorganic adhesive; and a process for their production.

Inorganic separator-electrode-unit for lithium-ion batteries, method for the production thereof and use thereof in lithium batteries

The present invention relates to a flexible ceramic membranes which, depending on embodiment, are useful as separators for batteries, especially lithium batteries and also as a process for their production. Ceramic or hybridic membranes have the advantage that, whatever the level of flexibility already achieved, they tend to crumble of the ceramic coating on bending. this is prevented by the present membranes, which comprise, on and in a polymeric nonwoven, a solidified ceramic coating which is constructed from two fraction which metal oxide particles of different size and which adheres to the polymeric nonwoven through a network constructed by two different adhesion promoters.

Ceramic, flexible membrane providing improved adhesion to the support fleece

A process for producing a separator-electrode assemblies (SEAs) which comprises a porous electrode useful as a positive or negative electrode in a lithium battery and a separator layer applied to this electrode wherein the separator layer being an inorganic separator layer comprising at least two fractions of metal oxide particles different from each other in their average particle size and/or in the metal, and the electrode having active mass particles that are bonded together and to a current collector by an inorganic adhesive; and the separator-electrode assembly comprises no organic polymer binder. The process comprising form the porous electrode by applying a suspension comprising active mass particles suspended in a sol or a dispersion of nanoscale active mass particles in a solvent and solidifying the suspension.

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Rhede, Germany

Christian Hying