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WO1997033329A1 - Couche d'isolation electrique pour la connexion de composants electroconducteur d'une pile a combustible pour hautes temperatures - Google Patents

Couche d'isolation electrique pour la connexion de composants electroconducteur d'une pile a combustible pour hautes temperatures Download PDF

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Publication number
WO1997033329A1
WO1997033329A1 PCT/DE1997/000330 DE9700330W WO9733329A1 WO 1997033329 A1 WO1997033329 A1 WO 1997033329A1 DE 9700330 W DE9700330 W DE 9700330W WO 9733329 A1 WO9733329 A1 WO 9733329A1
Authority
WO
WIPO (PCT)
Prior art keywords
insulating layer
electrically insulating
layer
fuel cell
temperature fuel
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.)
Ceased
Application number
PCT/DE1997/000330
Other languages
German (de)
English (en)
Inventor
Horst Greiner
Edgar Friedl
Manfred Wohlfart
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to AU22862/97A priority Critical patent/AU2286297A/en
Publication of WO1997033329A1 publication Critical patent/WO1997033329A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
    • 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
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
    • H01M2008/1293—Fuel cells with solid oxide electrolytes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2300/00—Electrolytes
    • H01M2300/0017—Non-aqueous electrolytes
    • H01M2300/0065—Solid electrolytes
    • H01M2300/0068—Solid electrolytes inorganic
    • H01M2300/0071—Oxides
    • H01M2300/0074—Ion conductive at high temperature
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the invention relates to an electrically insulating layer for connecting electrically conductive components of a high-temperature fuel cell and to high-temperature fuel cells.
  • a method for joining components of a high-temperature fuel cell is known from the published patent application DE 43 34 438 A1, for example, in which the components are joined by means of a composite glass solder.
  • the glass and composite components are present in a powder which is arranged between the components and heated to a soldering temperature together with the components and is then held there for a soldering period.
  • the Components heated and thus included directly in the manufacturing process of the joining layer For the production of this joining layer, the Components heated and thus included directly in the manufacturing process of the joining layer.
  • components from a composite glass solder are known from published patent application DE 42 42 728 AI. However, these components are only used for supplying equipment for the high-temperature fuel cells. They are not used to assemble the components of the high-temperature fuel cells.
  • a problem with the manufacturing methods known from the prior art for electrical insulation with the additional property of gas impermeability proves that the components to be joined are actively involved in the manufacturing process of the insulating layer.
  • the properties of the components to be joined are partially changed, at least for a short time, or the components must be at least mechanically incorporated into the manufacturing process for the manufacture of the electrically insulating layer, which in turn leads to considerable expenditure on equipment.
  • the invention is therefore based on the object of specifying an electrically insulating layer for connecting electrically conductive components of a high-temperature fuel cell which is impermeable to gases and in which the production of the electrically insulating layer is largely independent of the electrically conductive components to be joined. Furthermore, high-temperature fuel lines are specified in which such an electrically insulating layer is used.
  • the first-mentioned object is achieved according to the invention by an electrically insulating layer for connecting electrically conductive components of a high-temperature fuel cell, the electrically insulating layer containing at least two layers of a glass solder and a layer of one between these layers Ceramic is arranged.
  • the second object is achieved according to the invention on the one hand by a high-temperature fuel cell in which an electrically insulating layer is arranged between two bipolar plates, the electrically insulating layer containing at least two layers of a glass solder and a layer between these layers a ceramic is arranged.
  • the second object is achieved according to the invention by a high-temperature fuel cell, in which an electrically insulating layer is arranged between a bipolar plate and an electrolyte, the electrically insulating layer containing at least two layers of a glass solder and between a layer of ceramic is arranged in these layers.
  • the layers of the electrically insulating layer are produced independently of one another and decoupled from the electrically conductive components to be joined.
  • the layers of the electrically insulated the layer largely individually made depending on the geometric boundary conditions of the electrically conductive components to be joined.
  • a template of the electrically insulating layer is created which corresponds to the desired area to be used.
  • the layers of the electrically insulating layer are then produced in accordance with the template and, in the finished state, are fitted into the high-temperature fuel cell arrangement, without the need to make any changes to the electrically conductive components to be joined.
  • the electrically insulating layer additionally fulfills the property of gas impermeability, gas-conducting channels can also be integrated into the electrically insulating layer, which channels are gas-insulated from the environment due to the nature of the insulating layer.
  • this electrically insulating layer acts as a supporting element between the bipolar plates of the high-temperature fuel cell. If several high-temperature fuel cells are stacked on top of one another for the assembly of a high-temperature fuel cell stack, a considerable weight arises, which is intercepted by these electrically insulating layers between the bipolar plates.
  • the outer layers of the electrically insulating layer preferably consist of an alkali-free glass solder with the highest possible transformation temperature.
  • the temperature at which the glass solder changes from the liquid to the glass state or vice versa is defined as the transformation temperature.
  • the glass solder AF45 is suitable as a glass solder, which experts also call thin glass. is drawn.
  • AF45 is a modified borosilicate glass with high proportions of BaO and Al 2 0 3 . Its synthesis is alkali-free and, in the finished embodiment, has fire-polished surfaces which are achieved by a special drawing process. This special glass is easy to process and is therefore suitable for the desired application.
  • the ceramic layer consists of sintered MgO.
  • Sintered MgO is particularly suitable for electrically conductive components to be connected made of alloys based on Fe and Ni.
  • the ceramic layer consists of the spinel MgO / Al 2 0 3 or an MgO / Al 2 0 3 mixture.
  • MgO / Al 2 0 3 spinel in other words magnesium aluminate, is particularly suitable for joining together electrically conductive components which consist of a Cr-based alloy.
  • the thickness of the layer of ceramic is preferably selected such that the layers of glass solder are between 100 and 200 ⁇ m thick. If the thickness of the electrically insulating layer is predetermined, due to the geometric structure of the electrically conductive components to be connected, the bulk of the electrically insulating layer is filled out of the ceramic by the volume of the layer.
  • the layer made of ceramic has a thickness between
  • the ceramic layer has a thickness between 200 and 300 ⁇ m.
  • FIG. 1 shows an electrically insulating layer for connecting electrically conductive components of a high-temperature fuel cell in a cross section in a schematic representation
  • FIG. 2 shows a section of a high-temperature fuel cell in a cross section in a schematic representation.
  • the electrically insulating layer 4 consists of three layers 8, 10, 12 arranged one above the other.
  • the two outer layers 8, 12 of the electrically insulating layer 4 consist of a glass solder and ensure an integral gas-insulating connection with the electrically conductive components 2, 6 to be joined together.
  • the layers 8, 12 of the electrically insulating layer 4 preferably consist of an alkali-free glass solder with a transformation temperature as high as possible, for example from the glass solder with the designation AF45.
  • the layer 10 of the electrically insulating layer 4 is arranged between the two layers 8, 12 and consists of one Ceramics. If the electrically conductive components 2, 6 are composed of an Fe or a Ni-based alloy, then a suitable material for the layer 10 of the electrically insulating layer 4 is sintered ceramic foil made of MgO. If a material made of a Cr-based alloy is selected for the electrically conductive components 2, 6, MgO / Al 2 O 3 Spi ⁇ nell or a MgO / Al 2 0 3 mixture are preferred as the material for the layer 10 of the electrically insulating layer suitable. For example, 63% by weight MgO and 37% by weight A1 2 0 3 are selected as the mixture.
  • the thickness of the layer 10 of the electrically insulating layer 4 is selected such that the layers 8, 12 of the electrically insulating layer 4 made of the glass solder are between 100 and 200 ⁇ m thick. Depending on the geometrically predetermined distance between the electrically conductive components 2, 6, which is to be filled by the electrically insulating layer 4, the thickness of the layers 8, 12 of the electrically insulating layer 4 remains approximately constant and that with a larger selected distance The area to be filled between the electrically conductive components 2, 6 is thus filled by the layer 10 from the ceramic.
  • FIG. 2 shows a section of a high-temperature fuel cell 20 with a solid electrolyte arrangement 22 which has two electrodes 24, 26.
  • An electrolyte 28 is arranged between the electrodes 24, 26.
  • An electrically conductive contact element 30 is arranged between the electrodes 24, 26 and the bipolar plates 32 and 34, respectively.
  • the solid electrolyte arrangement 22 is arranged in a gap 36 between the two bipolar plates 32, 34.
  • the solid electrolyte arrangement 22 is supplied with an operating medium via a feed 40 and the bipolar plates 32, 34.
  • An electrically insulating layer 42 connects the two bipolar plates 32, 34 to one another in a material-tight and gas-impermeable manner. Furthermore, an electrically insulating layer 44 connects the bipolar plate 34 to the electrolyte 28 in a cohesive and gas-impermeable manner. Both the electrically insulating layer 42 and the electrically insulating layer 44 are composed of the layers 8, 10, 12 known from FIG.
  • the feed 40 is thus gas-tight against an atmosphere outside the high-temperature fuel cell 20 and against at least one of the electrodes 24, 26.
  • the layer 10 of the electrically insulating layer 42 has a thickness between 400 and 800 ⁇ m in this embodiment.
  • the layer 10 of the electrically insulating layer 44 is between 200 and 300 ⁇ m thick.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fuel Cell (AREA)

Abstract

L'invention concerne une couche d'isolation électrique (4) servant à la connexion de composants électroconducteur (2, 6) d'une pile à combustible pour hautes températures. La couche d'isolation électrique (4) contient au moins deux strates (8, 12) constituées d'une soudure en verre. Une strate (10) constituée de céramique est disposée entre les deux strates (8, 12), ce qui simplifie la production de la couche d'isolation électrique (4).
PCT/DE1997/000330 1996-03-06 1997-02-24 Couche d'isolation electrique pour la connexion de composants electroconducteur d'une pile a combustible pour hautes temperatures Ceased WO1997033329A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU22862/97A AU2286297A (en) 1996-03-06 1997-02-24 Electrically insulating layer for connection of electrically conductive components of a high-temperature fuel cell

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19608727.9 1996-03-06
DE19608727A DE19608727C1 (de) 1996-03-06 1996-03-06 Elektrisch isolierende Schicht zum Verbinden von elektrisch leitenden Bauelementen einer Hochtemperatur-Brennstoffzelle

Publications (1)

Publication Number Publication Date
WO1997033329A1 true WO1997033329A1 (fr) 1997-09-12

Family

ID=7787436

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1997/000330 Ceased WO1997033329A1 (fr) 1996-03-06 1997-02-24 Couche d'isolation electrique pour la connexion de composants electroconducteur d'une pile a combustible pour hautes temperatures

Country Status (3)

Country Link
AU (1) AU2286297A (fr)
DE (1) DE19608727C1 (fr)
WO (1) WO1997033329A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6165632A (en) * 1997-10-02 2000-12-26 Siemens Aktiengesellschaft High-temperature fuel cell and high-temperature fuel cell stack
US9989420B2 (en) 2014-05-01 2018-06-05 Ngk Spark Plug Co., Ltd. Temperature sensitive element and temperature sensor

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE209399T1 (de) 1997-08-13 2001-12-15 Siemens Ag Verfahren zum herstellen einer isolierenden komponente für eine hochtemperatur- brennstoffzelle und hochtemperatur- brennstoffzelle
EP0921583A1 (fr) * 1997-12-05 1999-06-09 Siemens Aktiengesellschaft Etanchéification de piles à combustible et d'empilements de piles à combustible fonctionnant à haute température
US7222406B2 (en) 2002-04-26 2007-05-29 Battelle Memorial Institute Methods for making a multi-layer seal for electrochemical devices
AT505141B1 (de) * 2007-05-04 2009-02-15 Alpps Fuel Cell Systems Gmbh Verbindung von chemischen oder thermischen reaktoren

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0426265A2 (fr) * 1989-09-12 1991-05-08 Mitsubishi Jukogyo Kabushiki Kaisha Pile à combustible à électrolyte solide
DE4324181A1 (de) * 1992-08-24 1994-03-03 Siemens Ag Hochtemperatur-Brennstoffzelle, Brennstoffzellen-Einrichtung und Verfahren zur Herstellung derselben
JPH06231784A (ja) * 1992-09-01 1994-08-19 Fuji Electric Co Ltd 固体電解質型燃料電池
JPH0745295A (ja) * 1993-07-30 1995-02-14 Sanyo Electric Co Ltd 固体電解質燃料電池用ガスシール材
DE4334438A1 (de) * 1993-10-08 1995-04-13 Siemens Ag Composit-Glaslot sowie Verwendung des Composit-Glaslotes und Verfahren zum Fügen von Bauelementen
WO1996017394A1 (fr) * 1994-12-01 1996-06-06 Siemens Aktiengesellschaft Cellule electrochimique a joues bipolaires a revetement ceramique et leur production
DE19538034C1 (de) * 1995-10-12 1997-01-09 Siemens Ag Hochtemperatur-Brennstoffzelle mit wenigstens einer elektrisch isolierenden Schicht und Verfahren zum Herstellen einer Hochtemperatur-Brennstoffzelle

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4242728A1 (de) * 1992-12-17 1994-06-23 Dornier Gmbh Keramische Gasanschlußbauteile für Brennstoffzellen mit Zirkonoxid-Festelektrolyt

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0426265A2 (fr) * 1989-09-12 1991-05-08 Mitsubishi Jukogyo Kabushiki Kaisha Pile à combustible à électrolyte solide
DE4324181A1 (de) * 1992-08-24 1994-03-03 Siemens Ag Hochtemperatur-Brennstoffzelle, Brennstoffzellen-Einrichtung und Verfahren zur Herstellung derselben
JPH06231784A (ja) * 1992-09-01 1994-08-19 Fuji Electric Co Ltd 固体電解質型燃料電池
JPH0745295A (ja) * 1993-07-30 1995-02-14 Sanyo Electric Co Ltd 固体電解質燃料電池用ガスシール材
DE4334438A1 (de) * 1993-10-08 1995-04-13 Siemens Ag Composit-Glaslot sowie Verwendung des Composit-Glaslotes und Verfahren zum Fügen von Bauelementen
WO1996017394A1 (fr) * 1994-12-01 1996-06-06 Siemens Aktiengesellschaft Cellule electrochimique a joues bipolaires a revetement ceramique et leur production
DE19538034C1 (de) * 1995-10-12 1997-01-09 Siemens Ag Hochtemperatur-Brennstoffzelle mit wenigstens einer elektrisch isolierenden Schicht und Verfahren zum Herstellen einer Hochtemperatur-Brennstoffzelle
WO1997013731A2 (fr) * 1995-10-12 1997-04-17 Siemens Aktiengesellschaft Pile a combustible haute temperature dotee d'au moins une couche electroisolante et son procede de production

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, vol. 107, no. 2, 13 July 1987, Columbus, Ohio, US; abstract no. 10510, OGAWA ET AL: "Molten-carbonate fuel cells" XP002035059 *
CHEMICAL ABSTRACTS, vol. 121, no. 26, 26 December 1994, Columbus, Ohio, US; abstract no. 304686, HARUFUJI: "Solid electrolyte fuel cells with improved gas seals" XP002035058 *
PATENT ABSTRACTS OF JAPAN vol. 095, no. 005 30 June 1995 (1995-06-30) *
PATENT ABSTRACTS OF JAPAN vol. 11, no. 275 (E - 537) 5 September 1987 (1987-09-05) *
PATENT ABSTRACTS OF JAPAN vol. 18, no. 599 (E - 1631) 15 November 1994 (1994-11-15) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6165632A (en) * 1997-10-02 2000-12-26 Siemens Aktiengesellschaft High-temperature fuel cell and high-temperature fuel cell stack
AU730237B2 (en) * 1997-10-02 2001-03-01 Siemens Aktiengesellschaft High-temperature fuel cell and high-temperature fuel cell stack
US9989420B2 (en) 2014-05-01 2018-06-05 Ngk Spark Plug Co., Ltd. Temperature sensitive element and temperature sensor

Also Published As

Publication number Publication date
AU2286297A (en) 1997-09-22
DE19608727C1 (de) 1997-06-19

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