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WO2008138787A1 - Module à pile à combustible haute température et procédé de production dudit module - Google Patents

Module à pile à combustible haute température et procédé de production dudit module Download PDF

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Publication number
WO2008138787A1
WO2008138787A1 PCT/EP2008/055451 EP2008055451W WO2008138787A1 WO 2008138787 A1 WO2008138787 A1 WO 2008138787A1 EP 2008055451 W EP2008055451 W EP 2008055451W WO 2008138787 A1 WO2008138787 A1 WO 2008138787A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel cell
cell module
temperature fuel
module according
housing
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/EP2008/055451
Other languages
German (de)
English (en)
Inventor
Patric Szabo
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.)
Deutsches Zentrum fuer Luft und Raumfahrt eV
Original Assignee
Deutsches Zentrum fuer Luft und Raumfahrt eV
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 Deutsches Zentrum fuer Luft und Raumfahrt eV filed Critical Deutsches Zentrum fuer Luft und Raumfahrt eV
Publication of WO2008138787A1 publication Critical patent/WO2008138787A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/2465—Details of groupings of fuel cells
    • H01M8/247—Arrangements for tightening a stack, for accommodation of a stack in a tank or for assembling different tanks
    • H01M8/2475—Enclosures, casings or containers of fuel cell stacks
    • 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
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/023—Porous and characterised by the material
    • H01M8/0232—Metals or alloys
    • 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
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/023—Porous and characterised by the material
    • H01M8/0241—Composites
    • H01M8/0245—Composites in the form of layered or coated products
    • 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
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04201—Reactant storage and supply, e.g. means for feeding, pipes
    • 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
    • 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
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
    • 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 a high-temperature fuel cell module comprising an anode-electrolyte-cathode unit with an anode, an electrolyte and a cathode, and a housing made of an electrically conductive material having one or more housing parts.
  • the invention further relates to a method for producing a high-temperature fuel cell module comprising one or more metallic components.
  • a fuel cell module which has a fuel cell which is provided at its anode and its cathode in each case with a current collector.
  • the anode is attached to its current collector by means of a solder.
  • a fuel cell unit comprising a cathode-electrolyte-anode unit and at least one contact element for electrically conductive contacting of the cathode-electrolyte-anode unit is known.
  • the at least one contact element comprises a plate provided with a plurality of openings.
  • a carrier for an electrochemical functional unit of a high-temperature fuel cell which for feeding of reactants and / or removal of reaction products has a porosity.
  • a fuel cell stack which comprises a plurality of fuel cells, which are connected by connecting elements electrically and mechanically.
  • the connecting elements are made of metal or a metal alloy and each connecting element has at least one electrode space and a porous wall. The porous wall of the connecting element separates the electrode space from an adjacent anode.
  • a solid electrolyte high-temperature fuel cell module which includes a plurality of series-connected and in a common, gas-tight and provided with supply ports for the fuel gas and oxygen housing planar solid electrolyte high-temperature fuel cells, wherein between at least one metallic bipolar plate connecting the cathode of one cell to the anode of the adjacent cell, electrically interconnecting the gas distribution by means of channels and forming a supporting structural element, and the metallic bipolar plate is made of a ferrite Chrome steel with 15% to 25% chromium and an aluminum additive.
  • an electrical contact for high-temperature fuel cells is known, which is formed as a composite of a metallic component and a ceramic component.
  • a fuel cell unit with a cathode-electrolyte-anode unit is known, in which an interconnector is formed from a KEA mounting element, a base plate and a gas distributor element, in this case the KEA mounting element and the Base plate as sheet metal parts as two shells of a housing gas-tight enclose the gas distributor element and applied / formed on an outer surface of the bottom plate webs of an electrically conductive material.
  • EP 1 263 067 A2 is a current collector of ferritic iron alloy for electrically connecting and mechanically supporting a stack of individual, an anode, electrolyte and cathode comprehensive planar SOFC high-temperature fuel cells, at temperatures between 700 0 C and 900 0 C. work and are equipped with a solid-state electrolyte.
  • the invention has for its object to provide a high-temperature fuel cell module, which can be produced in a simple manner and has advantageous properties.
  • At least one housing part is made by powder metallurgy.
  • components are obtained which can be produced without waste and waste (as they are produced, for example, during laser welding). It can produce near net shape components of the fuel cell module, which can also have complex geometries. For example, gas ducts or the like can be produced directly integrally. In conventional manufacturing processes components are punched or stamped. It has been shown that an elastic springback can take place, which can lead to a deterioration of the component quality and in particular to intolerable manufacturing tolerances. In the manufacture of a fuel cell module only small manufacturing tolerances are allowed, since fuel cell modules are merged into a fuel cell stack and while a high flatness of housing parts is required.
  • Powder metallurgical components can be produced with a high degree of automation.
  • At the at least one housing part can be, for example, integrally form a support device for the anode-electrolyte-cathode unit, said support device may be formed as a bipolar plate or is part of a bipolar plate.
  • the at least one housing part is a sintered part. It is made by sintering a green body. The sintered part can be produced close to contour.
  • the at least one housing part is made of a starting material which comprises a metal powder with a binder / solvent.
  • a porosity / non-porosity and thus a gas permeability / gas impermeability can be set via the binder fraction.
  • a pore-forming agent may be added if, for example, a porosity is to be provided in some areas.
  • the at least one housing part is made of steel.
  • Powder metallurgical steels (“PM steels”) with advantageous properties are commercially available.
  • a support device for the anode-electrolyte-cathode unit is arranged on the housing or a housing part.
  • the support device mechanically holds the anode-electrolyte-cathode unit.
  • the latter can be produced on the carrier device by successive layer construction.
  • the carrier device may be in the form of a bipolar plate. In particular, it directly holds an electrode (for example, the anode). It is made of an electrically conductive material (for electron conduction). It is also at least partially permeable to gas, so that the anode can be supplied with fuel gas.
  • the carrier device is arranged on the housing via an electrical contact device.
  • an electrical contact for electron conduction
  • the housing can be brought to anode potential if an anode is seated on the carrier device as the first layer.
  • the electrical contact device and / or the carrier device is made by powder metallurgy. It can then be manufactured in a defined manner in its geometry, for example with one or more gas-impermeable regions and one or more porous gas-permeable regions for supplying the anodes with fuel gas. It can also be integrally formed on the housing, for example.
  • the electrical contact device may be part of the carrier device or be a separate part which is fixed to the carrier device.
  • the support device can be supported on the housing.
  • the electrical contact device is made gas-permeable, so that the anode can be supplied with fuel gas via an anode chamber through the electrical contact device and the carrier device.
  • the carrier device is arranged directly on the housing and, for example, supported directly on a first housing part.
  • the housing is then designed accordingly, so that below the carrier device, an electrode space is formed, via which the directly arranged on the carrier device first electrode can be supplied with a corresponding reactant.
  • the housing is formed wavy at least in the region in which the support device is supported.
  • the housing has a substantially planar inner side, on which the carrier device (in particular via an electrical contact device) can be supported and can be fixed to the housing. It can also be provided that the housing is provided with a gas distribution structure. It is possible that the housing is provided with a gas distribution structure to supply an electrode which is disposed within the housing and / or provided with a gas distribution structure to reactivate an electrode of an adjacent fuel cell module in a fuel cell stack ,
  • a first housing part is "wavy" in such a way that an electrode space is formed and support surfaces are formed for the support device.
  • channels are provided, which are interconnected and form the anode compartment. Channels are also provided on an exterior of the housing.
  • the outer side provides a support surface for the connection of a cathode of an adjacent fuel cell module. Via the mentioned channels, this cathode can be supplied with an oxidizer.
  • the carrier device is made of an electrically conductive material to allow electrical contact between the anode and the housing.
  • the support device is integrally formed on the housing, wherein the housing part, on which the support device is formed, is produced by powder metallurgy and the support device is also manufactured by powder metallurgy.
  • the support device has a gas-impermeable frame region and at least one gas-permeable porous window region.
  • the at least one porous window area is held by the frame area.
  • the frame area ensures the mechanical stability of the carrier device, which is designed in particular as an interconnector or bipolar plate.
  • the support device can be fixed to the housing. For example, it is connected via the frame area with one or more housing parts.
  • an electrode (such as the anode) is arranged on the at least one window area.
  • the at least one window area provides a substrate for the anode, which is porous. This ensures the mechanical stability of the anode and the anode can be supplied with fuel gas. Furthermore, the electrical contact is ensured.
  • the housing has a first housing part, which is cup-shaped ("lower shell").
  • This first housing part in particular has a receiving space which at least partially accommodates the anode-electrolyte-cathode unit and on which the
  • Anode-electrolyte-cathode unit can be supported for example via the support device.
  • the housing has a second housing part, which is connected to the first housing part and which partially overlaps the anode-electrolyte-cathode unit.
  • the anode-electrolyte-cathode unit can be additionally connected to the housing, for example via a solder layer, for example via the anode and / or via a carrier device.
  • the second housing part has a window, on which spaced from the second housing part at least partially the cathode is arranged.
  • the anode-electrolyte-cathode unit and / or a support device for the anode-electrolyte-cathode unit is connected via a solder layer to the second housing part.
  • This improves the mechanical fixation of the anode-electrolyte-cathode unit or the carrier device in the housing.
  • a fluid seal for an anode space can be realized via the solder layer in order to be able to seal off this anode space from the cathode.
  • an additional provided electronic conduction path which improves the electrical contact of the anode to the housing.
  • solder layer is arranged on the electrolyte. As a result, the fluid-tight effect of the solder layer can be improved.
  • the carrier device is part of the housing.
  • the carrier device has in particular a gas-impermeable frame region, on which (integrally) at least one porous gas-permeable window region is arranged.
  • a corresponding fuel cell module can be built compact.
  • the carrier device forms a cover element of the housing, which closes off an electrode space (in particular anode space).
  • an electrode space in particular anode space.
  • a gas-tight electrolyte layer completely covers a gas-permeable window region of the carrier device, wherein an electrode is seated between the electrolyte layer and the carrier device. This is covered by the electrolyte layer, and to the extent that the window area is covered. Thereby, gas leakage through the carrier device to the other electrode side (such as the cathode side) can be effectively prevented.
  • a support frame which is manufactured by powder metallurgy. It can be a separate component.
  • the support frame is integrated in the housing. For example, it is formed on the first housing part and / or the second housing part.
  • a further object of the invention is to provide a method of the type mentioned at the outset, with which a high-temperature combustion Can provide Stoffzellenmodul, which has advantageous properties.
  • the method according to the invention has the advantages already explained in connection with the fuel cell module according to the invention.
  • one or more housing components of the high temperature fuel cell module are produced by powder metallurgy. It is also alternatively or additionally possible for a carrier device to be produced by powder metallurgy, for example in the form of an interconnector or a bipolar plate.
  • a green body which is sintered is produced from a starting material which comprises a metal powder and a binder.
  • the produced sintered part is for example a steel part made of PM steel.
  • the green body and thus also the sintered part are produced near net shape, for example by MIM processes.
  • one or more ceramic layers can be produced integrally on the at least one component produced by powder metallurgy.
  • a CIM method is used for this purpose. It is produced a green body, which is produced with one or more powder metallurgical starting materials and with one or several starting materials for an example, oxide ceramic layer. The sintering creates a sintered part with an integral ceramic layer.
  • Figure 1 is an exploded view of an embodiment of a high-temperature fuel cell module according to the invention.
  • FIG. 2 is a schematic sectional view of the high-temperature
  • Figure 3 is a schematic sectional view of a second embodiment of a high-temperature fuel cell module according to the invention.
  • FIG. 4 shows schematically method steps for the production of a component of an embodiment of an inventive device
  • FIG. 5 shows schematically method steps for a further embodiment
  • Figure 6 is a schematic partial sectional view of a third embodiment of a high-temperature fuel cell module according to the invention.
  • FIG. 7 is a schematic partial sectional view of a fourth embodiment of a high-temperature fuel cell module according to the invention.
  • An exemplary embodiment of a high-temperature fuel cell module according to the invention which is shown in exploded view in FIG. 1 and in a sectional view in FIG. 2 and designated therein by 10, comprises a housing 12 made of an electrically conductive material; the housing 12 is electronically conductive.
  • the housing 12 itself comprises a first housing part 14 and a second housing part 16.
  • the first housing part 14 and the second housing part 16 are connected to each other, for example via a welded joint or solder joint, so that they are at the same electrical potential. They can also be connected together in one piece.
  • the first housing part 14 is cup-shaped with a bottom member 18 and a peripheral wall portion 20 which is integrally formed on the bottom member 18 and projects beyond this transversely and in particular perpendicular. Between the wall portion 20 and the bottom member 18, a receiving space 22 is formed.
  • the bottom element 18 has an inner side 24, which is essentially flat and delimits the receiving space 22 downwards.
  • the first housing part 14 forms a lower shell of the housing 12.
  • the second housing part 16 is fixed to the first housing part 14 and projects transversely and in particular perpendicularly away from the wall region 20.
  • the second housing part 16 has an overlap region 26, with which it limits the receiving space 22 upwards and which is oriented at least approximately parallel to the floor element 18.
  • the second housing part 16 has, for example, a cuboid continuous window 28 in which, as will be described later, a cathode 30 of an anode-electrolyte-cathode unit 32 is positioned.
  • a support device 34 is arranged, which is made of a metallic material and such porous, the carrier device 34 is gas-permeable to an anode 36 of the anode-electrolyte-cathode unit 32.
  • the carrier device 34 is produced, for example, by powder metallurgy, using as starting material a mixture of a metal powder and a binder and optionally a pore-forming agent. The binder content or the pore-forming agent and its proportion is chosen so as to obtain the gas-permeable porosity of the carrier device 34.
  • the carrier device 34 is supported via an electrical contact device 38 on the inside 24 of the first housing part 14 and fixed to the first housing part 14 via this electrical contact device 38.
  • the electrical contact device 38 is fixed to the inside 24 of the first housing part 14, for example via solder joints or welded joints.
  • the electrical contact device 38 is fixed to an underside 40 of the carrier device 34 facing the inside 24, for example via soldered connections or welded connections.
  • the electrical contact device 38 is formed so that an electrical contact between the carrier device 34 and the first housing part 14 is present and thereby the carrier device 34 and the first housing part 14 are substantially at the same electrical potential (anode potential).
  • the electrical contact device 38 is arranged in an anode chamber 42, via which the anode 36 of the anode-electrolyte-cathode unit 32 fuel gas can be fed. Accordingly, the electrical contact device 38 is gas-permeable. It is designed, for example, as a net, woven or knitted fabric which allows fuel gas access via the anode space 42 to the carrier device 34 and through it to the anode 36.
  • the anode 36 is arranged on the carrier device 34. It is made, for example, from an oxide-ceramic material such as yttrium-stabilized zirconium oxide with nickel as catalyst. On the anode 36, an electrolyte layer with a gas-impermeable electrolyte 44 is arranged. This electrolyte is not conductive for electrons. He is, however, oxygen ion-conducting. For example, it is made from a ceramic material such as yttrium-stabilized zirconia.
  • the cathode 30 is disposed on the electrolyte 44. It is made for example of an oxide ceramic material. For example, mixed oxides such as lanthanum-strontium manganate are used for the production.
  • the electrolyte 44, the anode 36, the carrier device 34 and the electrical contact device 38 are arranged in the receiving space 22 of the housing 12.
  • the second housing part 16 partially overlaps this arrangement and in this respect forms an upper shell of the housing 12.
  • the cathode 30 is arranged in the window 28 spaced from the second housing part 16 so that there is no electrical contact therewith.
  • the anode 36 is supplied with fuel. The following cell reactions take place:
  • the corresponding fuel cell is operated at a temperature in the range of about 650 0 C to 1000 0 C.
  • the fuel which is hydrogen gas or contains hydrogen gas, may be supplied via a reformer, for example.
  • the electrolyte layer 44 is oxide-ceramic.
  • the carrier device 34 and / or the anode 36 is connected to the overlap region 26 of the second housing part 16 by a circumferential solder layer 46.
  • This solder layer 46 may also extend over the electrolyte 44.
  • the solder layer 46 is arranged and formed such that the
  • Anode space 42 is sealed fluid-tight with respect to the cathode 30 through this.
  • the solder layer 46 provides, in addition to the fixation of the carrier device 34 via the electrical contact device 38 on the housing 12, a further mechanical fixation of the anode-electrolyte-cathode unit 32 to the housing 12. Furthermore, an additional electronic conduction path 48 is provided by the solder layer 46 (in addition to the electronic conduction path 50 via the electrical contact device 38), which improves the electrical contacting of the anode 36 with the housing 12.
  • a further electrical contact device 52 is arranged on the cathode 30 ( Figure 1), via which the cathode 30 is electrically connectable to an adjacent high-temperature fuel cell module.
  • the electrical contact device 52 also provides an oxidator feedability to the cathode 30.
  • the electrical contact device 52 is supported for example via an electrical insulation 54 on the overlap region 26 of the second housing part 16.
  • the electrical insulation 54 may also be formed as a fluid seal.
  • openings 56 may be arranged, via which fuel can be coupled into the anode chamber 42.
  • openings 58 Corresponding then arranged in the second housing part 16 through openings 58, which are aligned with the openings 56.
  • first housing part 14 may then continue to be arranged alternately with the openings 56 openings 60, which serve for Oxidatorzu arrangement to the cathode 30. These openings 60 are not open relative to the anode space 42. They continue in openings 62 on the second housing part 16.
  • spacer rings 64 may be provided, which are arranged in the region of the openings 56, 60 and / or in the region of the openings 58/62.
  • the spacer rings 64 may be formed electrically conductive. They have passageways to allow fuel access to the anode space 42, or to allow oxidant access to the cathode 30.
  • the first housing part 14 and the second housing part 16 are produced by powder metallurgy.
  • the support device 34 may also be manufactured by powder metallurgy.
  • the electrical contact device 38 may be made by powder metallurgy.
  • the spacer rings 64 can also be produced by powder metallurgy.
  • a support frame for the high-temperature fuel cell module 10 which serves to prevent deformation of sealing surfaces in high-temperature operation, then this can also be produced by powder metallurgy. This can also be integrated into the housing 12 (in one piece).
  • a green body 68 is produced from a starting material 66 by binder curing.
  • the green body 68 is produced in particular near net shape.
  • the starting material is a mixture of a metal powder and binder / solvent.
  • a pore former can be added.
  • the amount of binder in the starting material 66 also allows the porosity (or non-porosity) to be adjusted.
  • steel powder is used as metal powder, the steel containing, for example, 14% to 95% Cr and 86% to 4% Fe.
  • alloying elements such as La, Ti, Nb, Nn, Ni, Y2O3, etc.
  • the green body 68 can be produced in a variety of ways, such as, for example, by compression, tape casting or injection molding (MIM).
  • MIM injection molding
  • the green body 68 is sintered in an oven and then the manufactured part 70 is obtained as a sintered part.
  • parts and in particular housing parts for a high-temperature fuel cell without waste in complex geometries with a high degree of automation can be manufactured near net shape. This makes it possible to set an optimum reactant distribution for the operation of a fuel cell.
  • powder metallurgical production also complex three-dimensional geometries can be produced.
  • gas ducts can be molded in without the risk of material rupture (as occurs in the case of deformation processes) being present. Warpage is avoided, so that it is possible to produce fuel cell stacks from high-temperature fuel cell modules with powder-metallurgically produced housing 12 effectively.
  • the green body 76 comprises a metallic region 78 and a region 80 which becomes oxide ceramic by sintering.
  • a ceramic layer 82 can be produced directly on the carrier device 34 or on the housing part 14. This layer production is integral with the production of a metallic component.
  • the anode is not the first layer on an electrode carrier but the cathode, ie. H. the cathode is arranged on a cathode support as a first layer, on the cathode, an electrolyte layer is arranged and on the electrolyte layer is arranged as the last layer, the anode.
  • a second exemplary embodiment of a fuel cell module according to the invention which is shown in schematic cross-section in FIG. 3 and designated therein by 84, comprises a housing 86 with a first housing part 88 and a second housing part 90.
  • the first housing part 88 and the second housing part 90 are produced by powder metallurgy , They are fundamentally In addition, the same design as the first housing part 14 and the second housing part 16 described above.
  • a support device 92 is arranged, for example in the form of a bipolar plate.
  • This support device 92 is made in particular powder metallurgy and made of an electrically conductive material such as PM steel. It comprises a frame portion 94 which is gas impermeable. This gas impermeability is "controlled” in the powder metallurgical production via the starting material and there via the binder content.
  • One or more window regions 96 are integrally formed on the frame region 94, wherein a window region 96 is porous and is thus gas-permeable. This porosity is set in the powder metallurgical production of starting material by the binder fraction and optionally via a pore former.
  • fuel gas may pass to an anode 98 of an anode-electrolyte-cathode unit 100 disposed on the support 92, with the anode 98 positioned directly on the support 92.
  • the support device 92 may be supported by support feet 102 on the first housing part 88, wherein support feet are in particular integrally arranged on the frame portion 94.
  • the support device 92 with the frame region 94 and the window or regions 96 and optionally the support feet 102 can be integrally produced by powder metallurgical manufacturing process. By spacing a lower side of a window region 96 of the carrier device 92 to an inner side of the first housing part 88, an anode space can be formed.
  • the support device 92 with the anode-electrolyte-cathode unit 100 arranged thereon can be a separately manufactured part which is subsequently fixed to the first housing part 88. It is also possible that the carrier device 92 is integrally arranged on the first housing part 88 or the second housing part 90 and in particular integrally formed thereon is. By a powder metallurgical production process, the carrier device can in principle be integrated into the housing 86 as a bipolar plate.
  • the fuel cell module 84 is basically the same as the high-temperature fuel cell module 10 and operates in the same way.
  • a third exemplary embodiment of a fuel cell module according to the invention which is shown in FIG. 6 and designated there by 194, comprises a housing 195 with a first housing part 196 and a second housing part 198.
  • the second housing part 198 is basically the same design as the second housing part 16 in the fuel cell module 10th
  • the first housing part 196 has a bottom region 200 which is "wavy".
  • An inner side 202 of this bottom region 200 comprises spaced elevations 204, between which channels 206 are formed.
  • the channels 206 are connected to one another in such a way that an anode space 208 is formed.
  • the anode chamber 208 is closed by the second housing part 198 upwards.
  • the projections 204 have an envelope 210, which is essentially a plane.
  • an anode support 212 is arranged. It is connected to the elevations 204, for example by welding or soldering.
  • anode support sits an electrochemical functional device with an anode, an electrolyte layer and a cathode.
  • the structure of the anode carrier, which is formed by a carrier device according to the invention, and the electrochemical functional device and the connection to the second housing part 198 is basically the same as described in the embodiment 10.
  • the support device 214 (which corresponds to the anode support 212) is supported directly on the first housing part 196.
  • An electrical contact device corresponding to the electrical contact device 38 is not provided.
  • the first housing part 196 is designed as a gas distributor.
  • the gas distributor which is formed by the elevations 204 on the inside 202 of the first housing part 196, is a gas distributor for fuel gas.
  • a gas distributor is also formed on a side 202 opposite the inside 202.
  • a cathode of an adjacent fuel cell module can be connected to the outside 216, wherein the cathode can be supplied with oxidizer gas through the corresponding channels on the outside 216.
  • the mode of operation of the fuel cell module 194 corresponds to the mode of operation of the fuel cell module 10.
  • a housing 220 with a first housing part 222 is provided.
  • the first housing part 222 is formed as a lower shell.
  • the first housing part 222 comprises a circumferential raised edge region 224 with a substantially planar end face 226. Placed on the end face sits a support device 228 which is connected to the edge region 224 of the first housing part 222, for example by soldering or welding.
  • the carrier device 228 is placed with a gas-impermeable frame portion 230 on the edge region 224.
  • a porous gas-permeable window portion 232 is integrally formed on the frame portion 230.
  • the carrier device 228 forms, in particular with its frame region 230, a second housing part 234.
  • An anode space 236 is delimited by the carrier device 228 as the second housing part 234 and the first housing part 222 with its raised edge region 224.
  • an electrical contact device 238 is arranged, which basically works like the electrical contact device 38 described above.
  • the electrical contact device 238 is in particular connected to the first housing part 222 and connected to the carrier device 228.
  • first housing part 222 It is basically possible for the first housing part 222 to be connected directly to the carrier device 228.
  • An anode 240 is disposed on the support device 228. This sits in particular on the window portion 232, without projecting beyond this.
  • the anode 240 is covered by an electrolyte layer 242.
  • the electrolyte layer 242 runs via a side surface 244 of the anode 240 into the frame region 230, that is to say the electrolyte layer 242 has a region 246 which lies on the frame region 230 of the carrier device 228.
  • the electrolyte layer 242 is gas-tight. It covers the anode 240 at the top outwards and over the area 246 laterally outwards. Since the region 246 is mounted on the frame portion 230, fuel gas can not pass from the window portion 232 directly to the cathode side or pass through the anode 240 to the cathode side laterally.
  • the electrolyte layer 242 completely covers the frame area 230 upwards. As a result, the insulation effect with respect to electronic conduction of the fuel cell module 218 to an adjacent fuel cell module can be increased.
  • the area covered by the electrolyte layer 242 is larger than the area of the window area 232 and is larger than the area of the anode 240.
  • the fuel cell module 218 operates as described above.

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

Abstract

L'objectif de l'invention est de créer un module à pile à combustible haute température, comprenant une unité anode-électrolyte-cathode dotée d'une anode, d'un électrolyte et d'une cathode, ainsi qu'un logement en matériau électroconducteur comprenant une ou plusieurs parties de logement, ledit module pouvant être produit de manière simple et présenter des propriétés avantageuses. A cet effet, au moins une partie du logement peut être produite par pulvérisation métallurgique.
PCT/EP2008/055451 2007-05-11 2008-05-05 Module à pile à combustible haute température et procédé de production dudit module Ceased WO2008138787A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007024227A DE102007024227A1 (de) 2007-05-11 2007-05-11 Hochtemperatur-Brennstoffzellenmodul und Verfahren zur Herstellung eines Hochtemperatur-Brennstoffzellenmoduls
DE102007024227.3 2007-05-11

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WO2008138787A1 true WO2008138787A1 (fr) 2008-11-20

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WO2010037681A1 (fr) * 2008-09-30 2010-04-08 Siemens Aktiengesellschaft Pile à combustible plane à haute température
DE102011053550A1 (de) 2011-09-13 2013-03-14 Deutsches Zentrum für Luft- und Raumfahrt e.V. Brennstoffzellenvorrichtung und Verfahren zum Herstellen oder Betreiben einer Brennstoffzellenvorrichtung
CN107925110A (zh) * 2015-07-14 2018-04-17 普兰西股份有限公司 电化学模块
CN112703623A (zh) * 2018-09-21 2021-04-23 罗伯特·博世有限公司 用于制造金属支撑的燃料电池和/或电解槽单元的方法
DE102023201569A1 (de) 2023-02-22 2024-08-22 Robert Bosch Gesellschaft mit beschränkter Haftung Wärmetauschervorrichtung, Elektrochemisches System und Verfahren zur Herstellung oder zum Betrieb der Wärmetauschervorrichtung

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DE102009006925B4 (de) 2009-02-02 2023-03-23 Sunfire Gmbh Interkonnektoranordnung für einen Brennstoffzellenstapel
DE102013212417A1 (de) 2013-06-27 2014-12-31 Robert Bosch Gmbh MIM-Hochtemperaturzellenanbindung
DE102016223781A1 (de) * 2016-11-30 2018-05-30 Robert Bosch Gmbh Brennstoffzelle mit verbesserter Robustheit

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DE1496111A1 (de) * 1962-06-27 1969-02-06 Gulf General Atomic Inc Brennstoffelement
US20020177026A1 (en) * 2001-04-23 2002-11-28 Nissan Motor Co., Ltd. Solid oxide electrolyte fuel cell plate structure, stack and electrical power generation unit
EP1263067A2 (fr) * 2001-05-31 2002-12-04 PLANSEE Aktiengesellschaft Collecteur de courant pour piles à combustible de type SOFC
WO2003036745A2 (fr) * 2001-10-24 2003-05-01 Global Thermoelectric Inc. Empilement de piles a combustible plates
US20030232230A1 (en) * 2002-06-12 2003-12-18 Carter John David Solid oxide fuel cell with enhanced mechanical and electrical properties
DE10343652A1 (de) * 2003-09-20 2005-05-04 Elringklinger Ag Verfahren zum Herstellen einer Lötverbindung zwischen einem Substrat und einem Kontaktelement einer Brennstoffzelleneinheit
WO2007085863A1 (fr) * 2006-01-30 2007-08-02 Ceres Intellectual Property Company Limited Pile à combustible

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010037681A1 (fr) * 2008-09-30 2010-04-08 Siemens Aktiengesellschaft Pile à combustible plane à haute température
US8940451B2 (en) 2008-09-30 2015-01-27 Siemens Aktiengesellschaft Planar high-temperature fuel cell
DE102011053550A1 (de) 2011-09-13 2013-03-14 Deutsches Zentrum für Luft- und Raumfahrt e.V. Brennstoffzellenvorrichtung und Verfahren zum Herstellen oder Betreiben einer Brennstoffzellenvorrichtung
DE102011053550B4 (de) 2011-09-13 2019-12-05 Deutsches Zentrum für Luft- und Raumfahrt e.V. Brennstoffzellenvorrichtung
CN107925110A (zh) * 2015-07-14 2018-04-17 普兰西股份有限公司 电化学模块
CN107925110B (zh) * 2015-07-14 2020-12-25 普兰西股份有限公司 电化学模块
CN112703623A (zh) * 2018-09-21 2021-04-23 罗伯特·博世有限公司 用于制造金属支撑的燃料电池和/或电解槽单元的方法
DE102023201569A1 (de) 2023-02-22 2024-08-22 Robert Bosch Gesellschaft mit beschränkter Haftung Wärmetauschervorrichtung, Elektrochemisches System und Verfahren zur Herstellung oder zum Betrieb der Wärmetauschervorrichtung

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