Evonik Degussa Gmbh

Degussa Aktiengesellschaft

Forschungszentrum Karlsruhe Gmbh

Evonik Operations Gmbh

Volker Hennige

Christian Hying

Gerhard Hoerpel

Sven Augustin

Petr Novak

Jens Vetter

Gerhard Hörpel

Edwin Nun

Michael Holzapfel

Carsten Jost

Marie-Theres Wilkes

Hannelore Armoneit

Sigrid Banken

Norbert Kern

Eckart Berendes

Christian Herkt-Bruns

Anna Prodi-Schwab

Markus Oles

Andreas Gutsch

Frank-Martin Petrat

Joachim Binder

Bernhard Schleich

Jürgen Hausselt

Hans-Joachim Ritzhaupt-Kleissl

Gerhard Geipel

Thomas Schrief

Evelyn Albrecht

Uwe Paulmann

Hilmi Buqa

Kirsten Honnef

Shikha Ray

Petr Novák

David Lee

Chistian Hying

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 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

The invention relates to an electrode material for a lithium ion battery which is distinguished by the fact that the electrode material comprises

Nanoscalar silicon particles in negative electrode materials for use in lithium-ion batteries

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.

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 insulting ceramic coating, said separator being characterized by a thickness of less than 80 &#x3bc;m.

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

The present invention relates to a sealed natural cut stone, the pores of which are permeable to water vapor but are impermeable to aqueous liquids, and a method for the production thereof and the use of such natural cut stones.

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Duelmen, Germany

Volker Hennige