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DE19838800C1 - Battery separator based on ceramic-coated carrier material - Google Patents

Battery separator based on ceramic-coated carrier material

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Publication number
DE19838800C1
DE19838800C1 DE19838800A DE19838800A DE19838800C1 DE 19838800 C1 DE19838800 C1 DE 19838800C1 DE 19838800 A DE19838800 A DE 19838800A DE 19838800 A DE19838800 A DE 19838800A DE 19838800 C1 DE19838800 C1 DE 19838800C1
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DE
Germany
Prior art keywords
separator
substrate
ceramic
coating
battery separator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE19838800A
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German (de)
Inventor
Thomas Berger
Angela Piepke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
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Priority to DE19838800A priority Critical patent/DE19838800C1/en
Priority to PCT/EP1999/003080 priority patent/WO1999057769A1/en
Application granted granted Critical
Publication of DE19838800C1 publication Critical patent/DE19838800C1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/02—Diaphragms; Separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/403—Manufacturing processes of separators, membranes or diaphragms
    • H01M50/406—Moulding; Embossing; Cutting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/431—Inorganic material
    • H01M50/434—Ceramics
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
    • H01M50/491—Porosity
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0289—Means for holding the electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/06—Lead-acid accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/24—Alkaline accumulators
    • H01M10/30—Nickel accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/34—Gastight accumulators
    • H01M10/345—Gastight metal hydride accumulators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Cell Separators (AREA)

Abstract

Die vorliegende Erfindung betrifft einen Separator zum Trennen unterschiedlicher physikalisch-chemischer oder elektrischer Kompartimente, gekennzeichnet durch ein flächiges, mit einer Vielzahl von Öffnungen versehenes Substrat, das mit einer offene Poren aufweisenden Beschichtung aus einem chemisch inerten, elektrisch isolierenden Material versehen ist. Der Separator ist z. B. in Batterien, in der Filtertechnik und in der Isolationstechnik einsetzbar.The present invention relates to a separator for separating different physico-chemical or electrical compartments, characterized by a flat substrate provided with a plurality of openings and provided with a coating made of a chemically inert, electrically insulating material and having open pores. The separator is e.g. B. in batteries, in filter technology and in insulation technology.

Description

Die vorliegende Erfindung betrifft einen Separator, der zur Anwendung in Batterien geeignet ist. Ein Separator ist ein dünner, poröser, isolierender Stoff mit hoher Ionendurchlässigkeit, guter mechanischer Festigkeit und Langzeitstabilität gegen die im System, z. B. im Elektrolyten der Batterie, verwendeten Chemikalien und Lösungsmittel. Er soll z. B. in Batterien die Kathode von der Anode elektronisch völlig isolieren. Außerdem muß er dauerelastisch sein und den Bewegungen im System, z. B. im Elektrodenpaket beim Laden und Entladen, folgen.The present invention relates to a separator for Application in batteries is suitable. A separator is a thin, porous, insulating material with high Ion permeability, good mechanical strength and Long-term stability against those in the system, e.g. B. in the electrolyte Battery, chemicals and solvents used. He should e.g. B. in batteries, the cathode of the anode electronically completely isolate. In addition, it must be permanently elastic and that Movements in the system, e.g. B. in the electrode package when loading and Unload, follow.

Der Separator bestimmt maßgeblich die Lebensdauer von Batterie- Zellen.The separator largely determines the lifespan of battery Cells.

Die Entwicklung einer wiederaufladbaren Batterie mit Lithium- Elektrode (negative Masse) ist wünschenswert. Hierfür eignen sich jedoch käufliche Separatoren nicht. In Batterien werden derzeit folgende Separatoren eingesetzt:
Celgard®; microporöse Folie aus PP
Vliese oder Gewebe aus PP, Glasfaser oder dergleichen
Fest- oder Polymerelektrolyte (mit Isoliereigenschaften) Aluminiumoxidpapier.The development of a rechargeable battery with a lithium electrode (negative ground) is desirable. However, commercially available separators are not suitable for this. The following separators are currently used in batteries:
Celgard®; microporous film made of PP
Nonwovens or fabrics made of PP, glass fiber or the like
Solid or polymer electrolytes (with insulating properties) aluminum oxide paper.

Solche Separatoren sind ungeeignet, weil sie entweder chemisch oder mechanisch nicht beständig sind, was zu Kurzschlüssen führt.Such separators are unsuitable because they are either chemical or are not mechanically stable, leading to short circuits leads.

Das System Li/LiAlCl4.x SO2/LiCoO2 besteht aus einer Lithiumkobaltdioxid-Elektrode (positive Masse), in die Lithiumionen reversibel ein- und ausgelagert werden können (Interkalationselektrode). Bei der Ladung des Systems werden die Lithiumionen aus der Interkalationselektrode ausgelagert und metallisch, im allgemeinen dendritisch, auf einem Ableiter (negative Masse) abgeschieden. The Li / LiAlCl 4 .x SO 2 / LiCoO 2 system consists of a lithium cobalt dioxide electrode (positive mass) into which lithium ions can be reversibly stored and removed (intercalation electrode). When the system is charged, the lithium ions are removed from the intercalation electrode and deposited on a conductor (negative mass) in a metallic, generally dendritic, manner.

Als Separator für dieses System war bisher nur Aluminiumoxidpapier verwendbar, da die Elektrolytlösung bzw. die bei der Überladereaktion produzierten Stoffe sehr aggressiv sind und mit den Kunststoffseparatoren reagieren.So far, was only used as a separator for this system Aluminum oxide paper can be used because the electrolyte solution or substances produced in the overloading reaction are very aggressive and react with the plastic separators.

Fest- oder Polymerelektrolyte haben eine wesentlich geringere Leitfähigkeit als die eingesetzten Elektrolytlösungen. Sie eignen sich deshalb nicht für die Herstellung von Hochleistungsbatterien.Solid or polymer electrolytes have a much lower one Conductivity than the electrolyte solutions used. she are therefore not suitable for the production of High-performance batteries.

Aluminiumoxidpapier ist spröde und nicht immer in der Lage, das Durchwachsen von Lithiumdendriten zu verhindern. Durch die Verwendung von Aluminiumoxidpapier ist eine flache Bauform vorgegeben, da es nicht biegbar ist.Alumina paper is brittle and not always able to do that Prevent lithium dendrites from growing through. Through the Using alumina paper is a flat design given because it is not bendable.

Aufgabe der Erfindung ist es, einen Batterie-Separator bereitzustellen, der eine hohe Ionendurchlässigkeit, Stabilität gegenüber den eingesetzten Chemikalien sowie mechanische Stabilität und Flexibilität aufweist. Bevorzugt verhindert er wirksam das Auftreten von Kurzschlüssen beim Aufladen von Batterien. Der Separator sollte insbesondere auch für den Einsatz in Hochleistungsbatterien geeignet sein.The object of the invention is a battery separator to provide high ion permeability, stability compared to the chemicals used as well as mechanical Has stability and flexibility. He prefers to prevent effective the occurrence of short circuits when charging Batteries. The separator should also be used for Suitable for use in high-performance batteries.

Die Aufgabe wird durch die Bereitstellung eines Batterie- Separators gelöst, der ein flächiges, biegbares, mit einer Vielzahl durchgängiger Öffnungen versehenes Substrat und auf diesem eine die Öffnungen des Substrates schließende, poröse Beschichtung aus einem elektrisch isolierenden, keramischen Material umfaßt. Als Substrat eignen sich Metalle und Legierungen, aber auch Nichtmetalle wie beispielsweise Kunststoffe, Glas und Kohlefaser, sofern sie durchgängige Öffnungen besitzen und biegsam sind.The task is accomplished by providing a battery Separators solved a flat, bendable, with a Large number of through openings provided substrate and on this one, the porous closing the openings of the substrate Coating made of an electrically insulating, ceramic Material includes. Metals and are suitable as substrates Alloys, but also non-metals such as Plastics, glass and carbon fiber, provided they have through openings and are flexible.

Selbstverständlich kann das Substrat aus einer Kombination der genannten Materialien bestehen. Durchgängige Öffnungen und Biegsamkeit kann man beispielsweise dadurch erzielen, daß man textile Flachsubstrate wie Gewebe, Gewirke, Gelege (Filze, Vliese) verwendet. Unter "textil" soll hier die Verwendung von Fäden, Fasern, (ggf. sehr) dünnen, gut biegbaren Drähten oder dergleichen verstanden werden. Weiterhin können Lochbleche, Streckmetalle und dergleichen verwendet werden. Die offene Fläche des Substrats wird den Anforderungen entsprechend gewählt, ist aber im allgemeinen nicht kritisch.Of course, the substrate can be a combination of mentioned materials exist. Through openings and For example, flexibility can be achieved by: flat textile substrates such as fabrics, knitted fabrics, scrims (felts, Fleece) used. Under "textile" the use of Threads, fibers, (possibly very) thin, easily bendable wires or  the like can be understood. Perforated sheets, Expanded metals and the like can be used. The open one The surface of the substrate will meet the requirements chosen, but is generally not critical.

Als chemisch inerte, elektrisch isolierende Beschichtungen sind Keramiken gut geeignet, beispielsweise binäre Oxide oder ternäre Oxide entsprechend der Formel AxByOz. Insbesondere finden Oxide der III. und IV. Haupt- und Nebengruppe und deren Mischungen Verwendung. Die Porösität der Beschichtung kann in einem breiten Bereich variieren. Sie beträgt bevorzugt 20 bis 60%, stärker bevorzugt 25 bis 50% und ganz besonders bevorzugt beträgt sie 30 bis 40%. Die Porengröße im keramischen Material kann ebenfalls variieren und liegt bevorzugt im Bereich von etwa 10 bis 100 nm.Ceramics are well suited as chemically inert, electrically insulating coatings, for example binary oxides or ternary oxides corresponding to the formula A x B y O z . In particular, oxides of III. and IV. main and sub-group and mixtures thereof use. The porosity of the coating can vary within a wide range. It is preferably 20 to 60%, more preferably 25 to 50% and very particularly preferably 30 to 40%. The pore size in the ceramic material can also vary and is preferably in the range from about 10 to 100 nm.

Der erfindungsgemäße Separator ist insbesondere für sekundäre (wiederaufladbare) Lithium-Batterien geeignet. Er ist allerdings nicht auf derartige Batterien beschränkt, sondern kann auch beispielsweise in Systemen wie NiMeH/NiCd/Bleiakku/etc. eingesetzt werden.The separator according to the invention is in particular for secondary ones Suitable for (rechargeable) lithium batteries. However, it is not limited to such batteries, but also can for example in systems such as NiMeH / NiCd / lead acid battery / etc. be used.

Der erfindungsgemäße Separator genügt allen Anforderungen der genannten Systeme. Er ist flexibel, ionendurchlässig, mechanisch stabil und chemisch inert. Durch Anpassung der Ausgangsmaterialien oder durch Nachbehandlung der keramischen Schicht kann verschiedenen chemischen und technischen Ansprüchen Rechnung getragen werden. So kann beispielsweise durch Nachbehandlung oder durch Umsetzung mit entsprechenden chemischen Gruppen, die dem Fachmann bekannt sind, eine hydrophile oder hydrophobe Beschichtung erzeugt werden. Als Beschichtungsverfahren einsetzbar sind neben dem im untenstehenden Beispiel dargestellten Tauchverfahren auch Beschichtungen durch elektrophoretische Abscheidung, Sprühen, Aufzentrifugieren oder Spin-coaten. The separator according to the invention meets all the requirements of mentioned systems. It is flexible, ion-permeable, mechanical stable and chemically inert. By adjusting the Starting materials or by post-treatment of the ceramic Layer can have different chemical and technical requirements Be taken into account. For example, by Aftertreatment or by implementation with appropriate chemical groups known to the person skilled in the art hydrophilic or hydrophobic coating can be generated. As Coating processes can be used in addition to the The immersion method shown below also Coatings by electrophoretic deposition, spraying, Centrifuge or spin-coat.  

Der erfindungsgemäße Separator ist durch Auswahl des geeigneten Substrates und der aufzubringenden Schichtdicke in der Dicke variabel herstellbar. Bevorzugt liegt die Separatordicke zwischen 100 und 500 µm. Er läßt sich einfach und in gleichmäßiger Qualität erzeugen.The separator according to the invention is selected by selecting the appropriate one Substrate and the layer thickness to be applied in the thickness variably producible. The separator thickness is preferably between 100 and 500 µm. It can be easily and in produce uniform quality.

Die erfindungsgemäßen Separatoren sind widerstandsfähig gegen das Durchwachsen von Lithiumdendriten, was eine längere Lebensdauer der Batterie und mehr Sicherheit bedeutet.The separators according to the invention are resistant to the growth of lithium dendrites, which is a longer one Battery life and more safety means.

Außerdem ist der Batteriebau nun nicht mehr auf die flache Bauweise beschränkt. Es können z. B. auch Wickelzellen hergestellt werden.In addition, the battery construction is no longer on the flat one Construction limited. It can e.g. B. also winding cells getting produced.

Nachstehend wird die Herstellung eines erfindungsgemäßen Separators anhand eines Beispiels beschrieben.The following is the production of an inventive Separators described using an example.

EdelstahlgewebeStainless steel mesh

Von der Fa. Bückmann (Nr.: E 31 122) Dicke ca.: 80 bis 90 µm; Gewicht ca.: 16 mg/cm2
From Bückmann (no .: E 31 122) thickness approx .: 80 to 90 µm; Weight approx .: 16 mg / cm 2

  • - zuschneiden- cut
  • - entfetten- degrease
  • - in eine Vorrichtung einspannen- clamp in a device
Suspensionsuspension

  • - 750 g Aluminiumoxid der Fa. Alcoa (Nr.: N0713-10)- 750 g aluminum oxide from Alcoa (no .: N0713-10)
  • - 840 ml destilliertes Wasser werden ca.: 10 min lang mit einem Ultraschallhomogenisator behandelt, um Agglomerate zu zerschlagen.- 840 ml of distilled water approx .: 10 minutes with an ultrasonic homogenizer treated to smash agglomerates.
  • - 150 µl Acetylaceton werden zugegeben, um spätere Agglomeratbildung zu unterdrücken. Diese Suspension wird vor jeder Tauchbeschichtung noch durch Siebe gegossen (160, 80 und 40 µm), um eine möglichst agglomeratfreie Beschichtung zu erhalten.- 150 ul acetylacetone are added to later agglomerate formation suppress. This suspension is in front of everyone Dip coating still poured through sieves (160, 80 and 40 µm) to ensure that the coating is as agglomerate-free as possible receive.

Das Edelstahlgewebe wird durch Eintauchen in die Suspension beschichtet. The stainless steel mesh is immersed in the suspension coated.  

SinternSintering

Im Schutzgasofen werden die Separatoren in Inertgasatmosphäre bei 1000 bis 1100°C mind. 15 min lang gesintert.The separators are placed in an inert gas atmosphere in an inert gas furnace sintered at 1000 to 1100 ° C for at least 15 min.

ErgebnisResult

Die so entstandenen Separatoren sind abriebfest, flexibel und durchlässig. Sie sind ca. 150 µm dick und haben ein Flächengewicht von ca. 40 mg/cm2. Die Gesamtporosität der Separatoren beträgt ca. 35% (gemessen mit Quecksilber- Porosimetrie), und die Hauptporengröße in der keramischen Schicht liegt im Bereich zwischen 30 und 80 nm.The separators created in this way are abrasion-resistant, flexible and permeable. They are approx. 150 µm thick and have a weight per unit area of approx. 40 mg / cm 2 . The total porosity of the separators is approximately 35% (measured using mercury porosimetry), and the main pore size in the ceramic layer is in the range between 30 and 80 nm.

Die Fig. 1 und 2 zeigen einen erfindungsgemäßen Separator gemäß Beispiel im Querschliff (Vergrößerungen: Fig. 1: 130 : 1, Fig. 2: 648 : 1). Man erkennt deutlich, daß das Substrat vollständig mit Keramik belegt ist, so daß ein Durchwachsen von Dendriten nicht mehr möglich ist. Allein das Vorhandensein der offenen Poren der Beschichtung ermöglicht den ungehinderten Ionendurchtritt. Figs. 1 and 2 show a separator according to the invention according to Example in the micrograph (magnification: FIG. 1: 130: 1, Fig. 2: 648: 1). It can clearly be seen that the substrate is completely covered with ceramic, so that dendrites can no longer grow through. The mere presence of the open pores of the coating enables the unhindered passage of ions.

Claims (5)

1. Batterie-Separator, umfassend ein flächiges, mit einer Vielzahl von Öffnungen versehenes, flexibles Substrat mit einer darauf befindlichen Beschichtung, dadurch gekennzeichnet, daß das Material des Substrates ausgewählt ist unter Metallen, Legierungen, Kunststoffen, Glas und Kohlefaser oder einer Kombination solcher Materialien und das Substrat vollständig mit einer porösen, elektrisch isolierenden, keramischen Beschichtung belegt ist.1. Battery separator comprising a flat, provided with a plurality of openings, flexible substrate with a coating thereon, characterized in that the material of the substrate is selected from metals, alloys, plastics, glass and carbon fiber or a combination of such materials and the substrate is completely covered with a porous, electrically insulating, ceramic coating. 2. Separator nach Anspruch 1, dadurch gekennzeichnet, daß das Substrat ein textiles Flachsubstrat, insbesondere ein Gewebe, Gelege, Gewirke, Filz oder Vlies, oder ein Lochblech oder ein Streckmetall ist.2. Separator according to claim 1, characterized in that the A flat textile substrate, in particular a substrate Fabrics, scrims, knitted fabrics, felt or fleece, or a Perforated sheet or an expanded metal. 3. Separator nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das keramische Material aus mindestens einem binären Oxid und/oder einem ternären Oxid der Formel AxByOz besteht.3. Separator according to claim 1 or 2, characterized in that the ceramic material consists of at least one binary oxide and / or a ternary oxide of the formula A x B y O z . 4. Separator nach Anspruch 3, worin das oder die Oxide ausgewählt ist/sind unter Oxiden der III. und IV. Haupt- und Nebengruppe.4. The separator of claim 3, wherein the one or more oxides is / are selected from oxides of III. and IV. main and subgroup. 5. Separator nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß das keramische Material aus Aluminiumoxid gebildet ist.5. Separator according to one of the preceding claims, characterized characterized in that the ceramic material Alumina is formed.
DE19838800A 1998-05-06 1998-08-26 Battery separator based on ceramic-coated carrier material Expired - Lifetime DE19838800C1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19838800A DE19838800C1 (en) 1998-05-06 1998-08-26 Battery separator based on ceramic-coated carrier material
PCT/EP1999/003080 WO1999057769A1 (en) 1998-05-06 1999-05-05 Electrical separator on the basis of a substrate with ceramic coating

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19820229 1998-05-06
DE19838800A DE19838800C1 (en) 1998-05-06 1998-08-26 Battery separator based on ceramic-coated carrier material

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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004049471A3 (en) * 2002-11-26 2005-03-10 Creavis Tech & Innovation Gmbh Separator provided with asymmetrical pore structures for an electrochemical cell
DE102004018350A1 (en) * 2004-04-06 2005-10-27 Varta Microbattery Gmbh Galvanic element
US7525788B2 (en) 2003-10-14 2009-04-28 Degussa Ag Capacitor comprising a ceramic separating layer
KR100955794B1 (en) * 2002-02-26 2010-05-06 에보닉 데구사 게엠베하 Electrical separator, preparation method thereof and use thereof
WO2010149265A1 (en) 2009-06-25 2010-12-29 Schott Ag Battery separator
DE102009028145A1 (en) 2009-07-31 2011-02-03 Evonik Degussa Gmbh Ceramic membranes with polyaramid fiber-containing support materials and process for making these membranes
DE102009029598A1 (en) 2009-09-18 2011-03-24 Schott Ag Textile fabrics for use in separators
DE102010013293A1 (en) 2010-03-29 2011-09-29 Schott Ag Lithium ion battery cell comprises components, which contain inorganic multifunctional component having a low thermal conductivity, where the inorganic multifunctional component has a reciprocal of the thermal diffusivity
DE102010013295A1 (en) 2010-03-29 2011-09-29 Schott Ag Lithium ion battery cell comprises components, which contain inorganic multifunctional component having a low thermal conductivity, where the inorganic multifunctional component has a reciprocal of the thermal diffusivity
DE102010013294A1 (en) 2010-03-29 2011-09-29 Schott Ag Lithium ion battery cell comprises components, which contain inorganic multifunctional component having a low thermal conductivity, where the inorganic multifunctional component has a reciprocal of the thermal diffusivity
WO2011124347A1 (en) 2010-03-29 2011-10-13 Schott Ag Components for battery cells with inorganic parts with low thermal conductivity
WO2011157489A1 (en) * 2010-06-17 2011-12-22 Sb Limotive Company Ltd. Lithium ion cell
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