WO2024004062A1 - Batterie à combustible à oxyde solide - Google Patents

Batterie à combustible à oxyde solide Download PDF

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Publication number
WO2024004062A1
WO2024004062A1 PCT/JP2022/025857 JP2022025857W WO2024004062A1 WO 2024004062 A1 WO2024004062 A1 WO 2024004062A1 JP 2022025857 W JP2022025857 W JP 2022025857W WO 2024004062 A1 WO2024004062 A1 WO 2024004062A1
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WIPO (PCT)
Prior art keywords
oxide fuel
solid oxide
metal support
fuel cell
support layer
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PCT/JP2022/025857
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English (en)
Japanese (ja)
Inventor
敬士 市原
利春 大和
Original Assignee
日産自動車株式会社
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 日産自動車株式会社 filed Critical 日産自動車株式会社
Priority to PCT/JP2022/025857 priority Critical patent/WO2024004062A1/fr
Publication of WO2024004062A1 publication Critical patent/WO2024004062A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • 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
    • H01M8/0273—Sealing or supporting means around electrodes, matrices or membranes with sealing or supporting means in the form of a frame
    • 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
    • H01M8/1213—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the electrode/electrolyte combination or the supporting material
    • 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

Definitions

  • the present invention relates to solid oxide fuel cells.
  • SOFC solid oxide fuel cell
  • US2011-0104586A1 discloses a solid oxide fuel cell with a porous metal support.
  • the density of a part of the metal support is increased, and the sealing member is surface-bonded to the high-density part of the metal support, thereby preventing gas leakage from the metal support. Prevents gas leaks from between the frame and the frame.
  • the present invention has been made in view of the above problems, and an object of the present invention is to provide a solid oxide fuel cell in which the airtightness of the power generation cell is ensured.
  • the first electrode layer, the solid electrolyte layer stacked on the first electrode layer, the second electrode layer stacked on the solid electrolyte layer, and the first electrode layer are supported.
  • a solid oxide fuel cell is provided in which a plurality of power generation cells each including a porous metal support layer are stacked.
  • This solid oxide fuel cell includes a metal frame provided under a porous metal support layer, and the porous metal support layer has a filling part, which is an area where the pores are filled with a filler, formed in the porous metal support layer. It is provided on the outer periphery of the metal support layer.
  • the metal frame is joined to the filling part of the porous metal support layer via a joint, and the joint includes a first joint formed along the outer periphery of the porous metal support layer, and a first joint.
  • the first joint part includes a second joint part disposed at a distance from the first joint part on the outer peripheral side.
  • FIG. 1 is an exploded perspective view of a solid oxide fuel cell according to a first embodiment of the present invention.
  • FIG. 2 is an exploded perspective view of the cell unit.
  • FIG. 3 is an enlarged schematic diagram of the joint portion between the power generation cell and the frame.
  • FIG. 4 is a cross-sectional view of the porous metal support layer.
  • FIG. 5 is an enlarged schematic diagram of a joint portion between a power generation cell and a frame according to a modified example.
  • FIG. 6 is a cross-sectional view of a porous metal support layer in a solid oxide fuel cell according to a first modification of the first embodiment.
  • FIG. 7 is a cross-sectional view of a porous metal support layer in a solid oxide fuel cell according to another modification.
  • FIG. 1 is an exploded perspective view of a solid oxide fuel cell according to a first embodiment of the present invention.
  • FIG. 2 is an exploded perspective view of the cell unit.
  • FIG. 3 is an enlarged schematic diagram of the joint portion between
  • FIG. 8 is a cross-sectional view of a porous metal support layer in a solid oxide fuel cell according to a second modification of the first embodiment.
  • FIG. 9 is a cross-sectional view of a porous metal support layer in a solid oxide fuel cell according to a third modification of the first embodiment.
  • FIG. 10 is a cross-sectional view of a porous metal support layer in a solid oxide fuel cell according to another modification.
  • FIG. 11 is a cross-sectional view of a porous metal support layer in a solid oxide fuel cell according to a fourth modification of the first embodiment.
  • FIG. 12 is a cross-sectional view of a porous metal support layer in a solid oxide fuel cell according to another modification.
  • FIG. 13 is a cross-sectional view of a porous metal support layer in a solid oxide fuel cell according to another modification.
  • FIG. 14 is an enlarged schematic diagram of the joint portion between the power generating cell and the frame in the solid oxide fuel cell according to the second embodiment.
  • FIG. 15 is an enlarged schematic diagram of a joint portion between a power generation cell and a frame in a solid oxide fuel cell according to a third embodiment.
  • FIG. 16 is a cross-sectional view of a porous metal support layer in a solid oxide fuel cell according to a third embodiment.
  • FIG. 1 is an exploded perspective view showing a solid oxide fuel cell 100 (hereinafter also simply referred to as a "fuel cell”) according to a first embodiment of the present invention.
  • the solid oxide fuel cell 100 is constructed by stacking a plurality of cell units 1 in the vertical direction. Note that, although the solid oxide fuel cell 100 of this embodiment is mainly mounted on a vehicle or the like, it is not limited thereto.
  • FIG. 2 is an exploded perspective view of the cell unit 1 that constitutes the solid oxide fuel cell 100.
  • the cell unit 1 includes a power generation cell 2, a frame 3, an anode flow path forming member 4, a cathode flow path forming member 5, a separator 6, an anode spacer 41, a cathode spacer 51, and the like.
  • the power generation cell 2 is constituted by a membrane electrode assembly in which an anode electrode layer (first electrode layer) is arranged on one surface of a solid electrolyte layer and a cathode electrode layer (second electrode layer) is arranged on the other surface.
  • the lower surface side of the power generation cell 2 is an anode electrode layer
  • the upper surface side is a cathode electrode layer.
  • Anode gas (fuel gas) and cathode gas (air) are supplied to the power generation cell 2, and the power generation cell 2 generates power based on electrode reactions in the anode electrode layer and the cathode electrode layer.
  • the power generation cell 2 includes a porous metal support layer that supports the electrode layer. That is, the solid oxide fuel cell 100 of this embodiment is a so-called metal support type fuel cell.
  • the power generation cell 2 has its peripheral edge joined and supported by a frame (frame body) 3 made of metal provided below the power generation cell 2, whereby the power generation cell 2 is connected to the frame (metal frame) 3. is fixed.
  • the frame 3 has a plurality of protrusions extending from the outer periphery, and holes 31 are formed in the protrusions.
  • the anode flow path forming member 4 is made of a conductive material such as metal, and is disposed between the anode electrode layer of the power generation cell 2 and a separator 6, which will be described later, and allows fuel gas to flow toward the anode electrode layer side of the power generation cell 2. Form an anode flow path.
  • the anode flow path forming member 4 is formed into a so-called wavy shape in which unevenness extending linearly in the width direction of the power generation cell 2 is repeatedly provided in the longitudinal direction. Thereby, a plurality of anode channels are defined between the anode electrode layer of the power generation cell 2 and the separator 6.
  • the cathode flow path forming member 5 is made of a conductive material such as metal, and is arranged between the cathode electrode layer of the power generation cell 2 and the separator 6 (of the adjacent cell unit 1), and is located on the cathode electrode layer side of the power generation cell 2.
  • a cathode flow path is formed through which cathode gas (air) flows.
  • the cathode flow path forming member 5 is formed in a wavy shape, and a plurality of cathode flow paths are defined between the cathode electrode layer of the power generation cell 2 and the separator 6.
  • the anode flow path forming member 4 forming the anode flow path and the cathode flow path forming member 5 forming the cathode flow path are each divided into two parts and separated from each other. Not limited. For example, two divided flow path members may be arranged close to each other without leaving a gap. Alternatively, the anode channel and the cathode channel may each be formed by one member.
  • the separator 6 is an electrically conductive plate-like member, and one surface (upper surface) is electrically bonded to the anode channel forming member 4. Thereby, the separator 6 and the anode electrode of the power generation cell 2 are electrically connected via the anode flow path forming member 4. On the other hand, the other surface (lower surface) of the separator 6 is joined to the cathode channel forming member 5 of the adjacent cell unit 1.
  • the separator 6 has a plurality of protrusions extending and protruding from the outer peripheral edge, and a hole 61 is formed in the protrusion at a position corresponding to the hole 31 of the frame 3.
  • the holes 61 of the separator 6 and the holes 31 of the frame 3 overlap to form holes through which fuel gas is supplied to the anode flow path and holes through which fuel gas exits from the anode flow path.
  • a sealing member 11 is provided around a hole formed by overlapping the hole 61 of the separator 6 and the hole 31 of the frame 3.
  • the anode spacer 41 is a frame layered on the outer periphery of the separator 6, and is arranged between the power generation cell 2 and the separator 6 to ensure the height of the anode flow path.
  • the anode spacer 41 is arranged so that its outer shape overlaps the frame 3 and the separator 6 to which the power generation cell 2 is fixed.
  • the cathode spacers 51 are arranged at both longitudinal ends of the cathode flow path forming member 5 to ensure the height of the cathode flow path and sealing both longitudinal ends of the cathode flow path forming member 5.
  • fuel gas anode gas
  • cathode flow path to the cathode electrode layer side of the power generation cell 2.
  • Air cathode gas
  • a frame is generally assembled under the power generation cell and a seal is formed between the power generation cell and the frame to prevent gas leakage.
  • the power generation cell includes a porous metal support layer that supports electrodes, even if the frame provided under the metal support layer and the metal support layer are sealed, the porous There is a risk of gas leaking from the sides of the metal support layer.
  • the power generation cell it is possible to prevent gas leaks from the sides and between the power generation cells and the frame.
  • the frame and power generation cell are made thinner in order to reduce size and weight, the power generation cell (metal support layer) will be easily deformed due to gas pressure difference and heating, and there is a risk that the seal portion may peel off. . That is, there is still a possibility that gas leakage may occur.
  • a filling part which is a region where pores are filled with a filling material, is provided on the outer peripheral part of the porous metal support layer that supports the electrode layer, and the frame 3 is connected to the two joint parts. It was decided that it would be joined to the filling part through the insulator. Specifically, a first bonding portion is formed along the outer periphery of the porous metal support layer, and a second bonding portion is disposed on the outer periphery side of the first bonding portion and spaced apart from the first bonding portion. The frame 3 is joined to the filling part by the joint part.
  • FIG. 3 is an enlarged schematic diagram of the joint portion between the power generation cell 2 and the frame 3, and is a sectional view taken along the line AA in FIG. 2.
  • the power generation cell 2 includes a solid electrolyte layer 21, an anode electrode layer (first electrode layer) 22 disposed on one surface of the solid electrolyte layer 21, and an anode electrode layer (first electrode layer) 22 disposed on one surface of the solid electrolyte layer 21.
  • a porous metal support layer (metal support, hereinafter also simply referred to as metal support layer) 24 that supports the anode electrode layer 22 is included.
  • the solid electrolyte layer 21 is formed of a dense ceramic layer.
  • ceramics refers to sintered bodies of inorganic substances, and is a concept that includes not only nonmetal oxides but also metal oxides.
  • the solid electrolyte layer 21 may be configured to be able to conduct oxide ions but not allow gas to pass therethrough.
  • the solid electrolyte layer 21 can be formed of solid oxide ceramics.
  • Solid oxide ceramics are not particularly limited, but include, for example, zirconia-containing materials. Examples of the zirconia-containing material include stabilized zirconia doped with yttria, neodymium oxide, samarium, gadolinium, scandium, and the like.
  • the anode electrode layer 22 has a porous structure and is formed of, for example, a metal such as nickel (Ni) and an oxide such as yttria-stabilized zirconia (YSZ), but is not limited to these and may be formed of any known material. May be used.
  • a metal such as nickel (Ni) and an oxide such as yttria-stabilized zirconia (YSZ), but is not limited to these and may be formed of any known material. May be used.
  • the cathode electrode layer 23 has a porous structure and is formed of, for example, lanthanum strontium cobalt composite oxide (LSC), lanthanum strontium cobalt iron oxide (LSCF), etc., but is not limited to these, and may be made of any known material. may also be used.
  • LSC lanthanum strontium cobalt composite oxide
  • LSCF lanthanum strontium cobalt iron oxide
  • the metal support layer 24 has a porous structure and is formed of, for example, ferritic stainless steel, but is not limited to this, and any known material may be used.
  • the metal support layer 24 is provided to support the anode electrode layer 22 and functions as a structural member for reinforcing the strength of the power generation cell 2.
  • the metal support layer 24 has a filled part 241, which is a region in which pores are filled with a filler, and a porous part 242, which is a region not filled with a filler.
  • the filling portion 241 is formed on the outer periphery of the metal support layer 24 .
  • the filling material filled in the filling part 241 is made of an insulating material with a coefficient of linear expansion smaller than that of the material forming the metal support layer 24, such as alumina, zirconia (ZrO 2 ), yttria-stabilized zirconia (YSZ), etc. ), scandia-stabilized zirconia (ScSZ), and the like can be used.
  • a metal frame 3 that supports and fixes the power generation cell 2 is provided below the metal support layer 24.
  • the metal support layer 24 includes a first joint 71 disposed on the inner circumference side of the filling part 241, and a first joint part 71 disposed on the outer circumference side of the filler part 241 at a distance from the first joint part 71.
  • a second joint portion 72 is formed.
  • the frame 3 is welded (joined) to the metal support layer 24 at a first joint 71 and a second joint 72 .
  • the average particle size of the filler filled in the pores is smaller than the average pore size of the core pores of the metal support layer 24. Thereby, the metal support layer 24 can be densely filled with the filler.
  • the filler is also filled in the space (gap) S surrounded by the first joint 71, the second joint 72, the metal support layer 24, and the frame 3. This further improves the airtightness between the filling part 241 and the frame 3.
  • the metal support layer 24 and the frame 3 may be joined without any gap (that is, without any space S).
  • the filler has a smaller coefficient of linear expansion than the material constituting the metal support layer 24, so even if the filler thermally expands at high temperatures, the metal support layer 24 will not be pushed. That is, the metal support layer 24 is prevented from being pushed and damaged due to thermal expansion of the filler.
  • the filler is made of an insulating material, even if the filler leaks from the side surface of the metal support layer 24 and connects to the electrode layer, no short circuit occurs.
  • the filler is filled from the side surface of the metal support layer 24.
  • the pores on the outer peripheral side of the metal support layer 24 can be reliably filled, and gas leaks from the side surfaces of the metal support layer 24 can be more reliably prevented.
  • the filler by filling the metal support layer 24 with the filler after welding, it is possible to prevent quality deterioration caused by welding the metal support layer 24 with the insulating material (filler) mixed therein.
  • FIG. 4 is a cross-sectional view of the entire metal support layer 24 along line BB in FIG. 3.
  • the first joint portion 71 where the frame 3 and the metal support layer 24 are joined is located along the outer periphery (filling portion 241) of the metal support layer 24 when viewed in the stacking direction of the cell unit 1. It is formed continuously over the entire circumference on one annular line (first annular line 32).
  • the second joint portion 72 where the frame 3 and the metal support layer 24 are joined is located at the outer periphery of the metal support layer 24 ( It is formed continuously over the entire circumference on a line (second annular line 33) that forms one annular shape along the filling portion 241).
  • the frame 3 has the first joint 71 formed along the outer periphery of the metal support layer 24 and the first joint 71 located on the outer periphery side of the first joint 71 and spaced apart from the first joint 71 . It is joined to the filling part 241 of the metal support layer 24 via the disposed second joint part 72 . Since the frame 3 and the filling part 241 are joined by the two joining parts 71 and 72, displacement (deformation) of the filling part 241 due to gas pressure difference, heating, etc. is suppressed, and the filling part 241 and the frame 3 are separated. This will be prevented. That is, gas leakage between the metal support layer 24 and the frame 3 can be prevented.
  • the filling portion 241 formed on the outer periphery of the metal support layer 24 prevents gas leakage from the side surface of the metal support layer 24, and the first joint portion is formed along the outer periphery of the metal support layer 24. 71 and the second joint 72 prevent gas leakage between the metal support layer 24 and the frame 3. Therefore, the airtightness of the power generation cell 2 is ensured, and a decrease in power generation performance is prevented.
  • the power generation cell 2 includes a porous metal support layer 24 that supports an anode electrode layer 22 (first electrode layer), and the porous metal support layer 24 has a filler on its outer periphery. It has a filling part 241 which is a region filled with pores. Moreover, the metal frame 3 provided under the porous metal support layer 24 is joined to the filling part 241 of the porous metal support layer 24 via a joint.
  • the bonding portion includes a first bonding portion 71 formed along the outer periphery of the porous metal support layer 24 and a spaced apart from the first bonding portion 71 on the outer circumferential side of the first bonding portion 71 . and a second joint portion 72 arranged therein.
  • the solid oxide fuel cell 100 has first and second joint parts 71 and 72 that join the metal frame 3 and the porous metal support layer 24, and the first joint part 71 has porous
  • the second bonding portion 72 is disposed on the first annular line 32 that is annular along the outer periphery of the solid metal support layer 24
  • the second joint 72 is disposed on the second annular line 32 that is located on the outer periphery of the first annular line 32 . It is arranged on the circular line 33.
  • the solid oxide fuel cell 100 has first and second joint parts 71 and 72 that join the metal frame 3 and the porous metal support layer 24 , and the first joint part 71 connects the porous metal support layer 24 to the first joint part 71 , 72 .
  • the second joint part 72 is continuously provided on the first annular line 32 along the outer periphery of the first annular line 32, and the second joint part 72 is continuously provided on the second annular line 33 located on the outer periphery of the first annular line 32. Continuously placed around the circumference. As a result, displacement (deformation) of the filling part 241 due to gas pressure difference, heating, etc. is suppressed over the entire outer circumference of the porous metal support layer 24, and separation of the filling part 241 and the frame 3 is further prevented. be done.
  • the porous metal support layer 24 has a filling part 241 in which pores are filled with a filler in the outer peripheral part, and the linear expansion coefficient of the filler is equal to that of the porous metal support. It is smaller than the linear expansion coefficient of the porous metal material that constitutes the layer 24. This prevents the metal support layer 24 from being pushed and damaged due to thermal expansion of the filler.
  • the lower surface side of the power generation cell 2 is the anode electrode layer (first electrode layer), and the upper surface side is the cathode electrode layer (second electrode layer), but this is not necessarily the case.
  • the lower surface side may be used as a cathode electrode layer, and the upper surface side may be used as an anode electrode layer.
  • the metal support layer 24 is provided on the anode electrode layer 22 side, but the structure is not necessarily limited to this. That is, it is sufficient that the metal support layer 24 is provided on at least one electrode side, and the metal support layer 24 and the metal frame 3 are bonded.
  • FIG. 2 the configurations of the anode flow path, cathode flow path, etc. described in FIG. 2 are merely examples, and are not particularly limited thereto.
  • the first joint portion 71 is formed at a certain position of the filling portion 241, but the first joint portion 71 is not necessarily limited to this.
  • the first joint portion 71 may be formed across the filling portion 241 and the porous portion 242, or may be formed in the porous portion 242 near the filling portion 241.
  • the metal frame 3 is joined to the porous metal support layer 24 by welding, but the joining method is not necessarily limited to this.
  • the metal frame 3 may be joined to the porous metal support layer 24 by brazing.
  • the metal support layer 24 is filled with a filler to form the filling portion 241 in the metal support layer 24, but the present invention is not necessarily limited to this.
  • the metal support layer 24 not only the metal support layer 24 but also the electrode layer (anode electrode layer 22) laminated on the metal support layer 24 may be filled with the filler to form a filling portion in the electrode layer as well.
  • the electrode layer is much thinner than the metal support layer 24, gas leakage can be prevented even with the configuration of this embodiment in which the filling portion 241 is formed only in the metal support layer 24.
  • a solid oxide fuel cell 100 according to a first modification of the first embodiment will be described with reference to FIG. 6.
  • This embodiment differs from the first embodiment in that the second joint portion 72 is formed discontinuously. Note that the same elements as in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.
  • FIG. 6 is a sectional view of the porous metal support layer 24 in the solid oxide fuel cell 100 according to this modification, and corresponds to a sectional view of the entire metal support layer 24 along line BB in FIG. 3.
  • the second joint portions 72 are arranged discontinuously on the second annular line 33. Specifically, the second joint portions 72 are arranged in a dotted line shape with intervals. That is, the frame 3 is welded to the metal support layer 24 in a dotted line shape at the second joint portion 72 on the second annular line 33 . This suppresses deformation of the metal support layer 24 due to thermal strain during welding, compared to the case where the second joint portions 72 are formed continuously. Therefore, the airtightness of the power generation cell 2 is strengthened, and gas leakage between the porous metal support layer 24 and the metal frame 3 is further prevented.
  • the second joint portions 72 are arranged in a dotted line shape with intervals, but the arrangement is not necessarily limited to this.
  • the porous metal support layer 24 in FIG. It may be provided so as to extend in a direction perpendicular to the other direction. Also in such a configuration, deformation of the metal support layer 24 due to thermal strain during welding is suppressed.
  • a solid oxide fuel cell 100 according to a second modification of the first embodiment will be described with reference to FIG. 8.
  • This embodiment differs from other embodiments in that the first joint portion 71 is formed discontinuously. Note that the same elements as in other embodiments are denoted by the same reference numerals, and the explanation thereof will be omitted.
  • FIG. 8 is a sectional view of the porous metal support layer 24 in the solid oxide fuel cell 100 according to this modification, and corresponds to a sectional view of the entire metal support layer 24 along line BB in FIG. 3.
  • the first joint portions 71 are arranged discontinuously on the first annular line 32. Specifically, the first joint portions 71 are arranged in a dotted line shape with intervals. That is, the frame 3 is welded to the metal support layer 24 in a dotted line shape at the first joint 71 on the first annular line 32 .
  • the second joint portions 72 are also arranged in a dotted line shape with intervals, similar to the first modification of the first embodiment. That is, the frame 3 is welded to the metal support layer 24 in a dotted line shape at the second joint portion 72 on the second annular line 33 .
  • first joint portion 71 and the second joint portion 72 are arranged in a staggered manner when viewed in the stacking direction of the cell unit 1 so that the portions where the joint portions are interrupted do not overlap. That is, the first bonding portion 71 and the second bonding portion 72 are arranged such that the bonding portion exists at least on either the outer circumferential side or the inner circumferential side of the filling portion 241 of the metal support layer 24 when viewed in the stacking direction. It is located.
  • first joint portion 71 and the second joint portion 72 are arranged in a staggered manner so that the joint portion exists at least on either the outer circumferential side or the inner circumferential side of the filling portion 241 of the metal support layer 24 when viewed in the stacking direction. Since the filling portion 241 is disposed in the same direction, displacement of the filling portion 241 due to gas pressure difference or heating is suppressed. Therefore, the airtightness of the power generation cell 2 is strengthened, and gas leakage between the porous metal support layer 24 and the metal frame 3 is further prevented.
  • both the first joint portion 71 and the second joint portion 72 are arranged in a dotted line shape with an interval between them, but this is not necessarily the case.
  • the second joint portion 72 may be arranged in a dotted line shape, and the second joint portion 72 may be continuously provided on the second annular line 33 over the entire circumference.
  • the first joint portions 71 are arranged in a dotted line shape with intervals, and a plurality of second joint portions 72 are arranged at intervals on the second annular line 33, and on the first annular line 32. It may be provided so as to extend in a direction perpendicular to the other direction. Even with such a configuration, deformation of the metal support layer 24 due to thermal strain during welding is suppressed.
  • a solid oxide fuel cell 100 according to a third modification of the first embodiment will be described with reference to FIG. 9.
  • This embodiment differs from other embodiments in that the first joint portion 71 is formed discontinuously at the corner. Note that the same elements as in other embodiments are denoted by the same reference numerals, and the explanation thereof will be omitted.
  • FIG. 9 is a sectional view of the porous metal support layer 24 in the solid oxide fuel cell 100 according to this modification, and corresponds to a sectional view of the entire metal support layer 24 along line BB in FIG. 3.
  • the first joint portion 71 is arranged on the first annular line 32 so that the corner portions are discontinuous. That is, the frame 3 is not joined to the metal support layer 24 at the corners of the first annular wire 32 . Normally, if there is a bending part in the joint part, joining work (welding etc.) becomes difficult, but in this modification, since there is no bending part in the first joint part 71, the frame 3 and the metal support layer 24 are Joining (welding, etc.) becomes easier.
  • the second joint portions 72 are arranged in a dotted line shape with intervals, but the arrangement is not limited thereto.
  • the second joint portions 72 may be arranged continuously over the entire circumference on the second annular line 33, or as shown in FIG. 10, the second joint portions 72 may be arranged at intervals, A plurality of them may be arranged so as to extend in a direction perpendicular to the first annular line 32.
  • a solid oxide fuel cell 100 according to a fourth modification of the first embodiment will be described with reference to FIG. 11.
  • This embodiment differs from the third modification of the first embodiment in that the second joint 72 includes a diagonal joint 721 formed to extend diagonally at a corner. Note that the same elements as in other embodiments are denoted by the same reference numerals, and the explanation thereof will be omitted.
  • FIG. 11 is a cross-sectional view of the porous metal support layer 24 in the solid oxide fuel cell 100 according to this modification.
  • the first joint 71 is disposed on the first annular line 32 so that the corner is discontinuous
  • the second joint 72 is disposed on the second annular line 32. They are arranged in a dotted line shape on the line 33.
  • the second joint portion 72 has a diagonal joint portion 721 formed to extend diagonally at the corner of the second annular line 33 .
  • the airtightness of the power generation cell 2 is strengthened, and gas leakage between the porous metal support layer 24 and the metal frame 3 is further prevented. Moreover, since there is no bending part in either the first joint part 71 or the second joint part 72, the joining (welding, etc.) between the frame 3 and the metal support layer 24 becomes easy.
  • the second joint parts 72 are arranged in a dotted line shape with intervals, but the invention is not limited to this.
  • the invention may be formed only from diagonal joints 721 that are formed to extend diagonally at the corners of the annular wire 33.
  • the shapes of the joint portions described in the first embodiment and the first to fourth modifications of the first embodiment are each described as a single embodiment, they may be combined as appropriate. That is, the first and second joints 71 and 72 may have any shape, such as a continuous shape over the entire circumference, a dotted line shape with intervals, a shape extending in the vertical direction, or a shape with discontinuous corners. The combination may be arbitrary. Furthermore, the first and second joints 71 and 72 may have different shapes in the longitudinal direction and the lateral direction of the metal support layer 24. For example, as shown in FIG.
  • a plurality of second joint portions 72 are arranged at intervals in the longitudinal direction of the metal support layer 24 and extend in a direction perpendicular to the first annular line 32, and They may be arranged in a dotted line shape with intervals in the direction.
  • a solid oxide fuel cell 100 according to a second embodiment will be described with reference to FIG. 14.
  • This embodiment differs from the first embodiment in that the first joint 71 and the second joint 72 have different welding depths. Note that the same elements as in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.
  • FIG. 14 is an enlarged schematic diagram of the joint portion between the power generation cell 2 and the frame 3, and corresponds to a cross-sectional view taken along line AA in FIG. 2.
  • the frame 3 is welded to the metal support layer 24 at a first joint 71 on the inner peripheral side and a second joint 72 on the outer peripheral side of the filling part 241.
  • the welding depth (penetration depth) at the first joint portion 71 is larger than the welding depth (penetration depth) at the second joint portion 72 by H.
  • the second joint 72 prevents the filling of the filler. This prevents interference and makes it easier to fill the metal support layer 24 with the filler from the side surface.
  • the welding depth of the first joint part 71 on the inner peripheral side is made larger, the first joint part 71 suppresses the filler from entering the central part of the power generation cell 2. That is, the insulating filler is prevented from entering the center of the power generation cell 2 and reducing the area of the active area (portion that contributes to power generation) of the power generation cell 2.
  • the metal frame 3 is welded to the porous metal support layer 24 at a first joint 71 and a second joint 72 disposed on the outer peripheral side of the first joint 71.
  • the welding depth at the first joint 71 is greater than the welding depth at the second joint 72. In this way, since the welding depth of the second joint part 72 on the outer circumferential side is made smaller, it becomes easier to fill the filler from the side surface of the porous metal support layer 24, and the filling part 241 is more reliably filled. It can be done.
  • the welding depth of the first joint 71 on the inner peripheral side is made larger, the intrusion of the filler material into the center of the power generation cell 2 is suppressed, and the area of the active area of the power generation cell 2 is reduced. can be suppressed.
  • a solid oxide fuel cell 100 according to a third embodiment will be described with reference to FIGS. 15 and 16.
  • This embodiment differs from other embodiments in that the metal frame 3 has an opening 34. Note that the same elements as in other embodiments are denoted by the same reference numerals, and the explanation thereof will be omitted.
  • FIG. 15 is an enlarged schematic diagram of the joint portion between the power generation cell 2 and the frame 3, and corresponds to a cross-sectional view taken along the line AA in FIG. 2. Further, FIG. 16 is a cross-sectional view of the entire porous metal support layer 24 along line CC in FIG. 15.
  • the frame 3 is welded to the metal support layer 24 at a first joint 71 on the inner peripheral side and a second joint 72 on the outer peripheral side of the filling part 241. Further, the frame 3 has a plurality of openings 34 opened downward between the first joint 71 and the second joint 72.
  • the frame 3 has the opening 34 between the first joint part 71 and the second joint part 72, when the filler is filled from the side surface of the metal support layer 24, the first When the entire metal support layer 24 (namely, the filling portion 241) between the bonding portion 71 and the second bonding portion 72 is filled with the filler, the filler reaches the opening 34. That is, it can be confirmed from the opening 34 that the filler has been filled between the first joint 71 and the second joint 72. Therefore, the filling portion 241 can be filled more reliably.
  • the welding depth at the first joint 71 is preferably greater than the welding depth at the second joint 72, but is not necessarily limited to this.
  • the welding depths of the first joint portion 71 and the second joint portion 72 may be the same.
  • the metal frame 3 has an opening 34 between the first joint 71 and the second joint 72. Thereby, it can be confirmed from the opening 34 that the filler is filled between the first joint part 71 and the second joint part 72, and the filling part 241 can be filled more reliably. . That is, gas leakage from the side surfaces of the metal support layer 24 can be further prevented.

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

Abstract

La présente invention concerne une batterie à combustible à oxyde solide formée par stratification d'une pluralité de cellules de production d'énergie qui sont composées chacune d'une première couche d'électrode, d'une couche d'électrolyte solide stratifiée sur la première couche d'électrode, d'une seconde couche d'électrode stratifiée sur la couche d'électrolyte solide, et d'une couche de support métallique poreuse destinée à supporter la première couche d'électrode. La batterie à combustible à oxyde solide de la présente invention comporte un cadre métallique disposé au-dessous de la couche de support métallique poreuse. La couche de support métallique poreuse a une partie remplie, qui est une région où les pores sont remplis d'un matériau de remplissage, au niveau de la partie périphérique externe de la couche de support métallique poreuse. Le cadre métallique est relié à la partie remplie de la couche de support métallique poreuse par l'intermédiaire de parties de liaison. Les parties de liaison comprennent une première partie de liaison formée de façon à être le long de la partie périphérique externe de la couche de support métallique poreuse, et une seconde partie de liaison qui est disposée de façon à être espacée de la première partie de liaison sur le côté périphérique externe par rapport à la première partie de liaison.
PCT/JP2022/025857 2022-06-28 2022-06-28 Batterie à combustible à oxyde solide WO2024004062A1 (fr)

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PCT/JP2022/025857 WO2024004062A1 (fr) 2022-06-28 2022-06-28 Batterie à combustible à oxyde solide

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Application Number Priority Date Filing Date Title
PCT/JP2022/025857 WO2024004062A1 (fr) 2022-06-28 2022-06-28 Batterie à combustible à oxyde solide

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WO2024004062A1 true WO2024004062A1 (fr) 2024-01-04

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008159428A (ja) * 2006-12-25 2008-07-10 Nissan Motor Co Ltd 多孔構造体、これを用いた固体電解質型燃料電池及び燃料電池スタック
JP2009146882A (ja) * 2007-10-05 2009-07-02 Topsoee Fuel Cell As 燃料電池支持体用シール
JP2011518416A (ja) * 2008-04-18 2011-06-23 ザ、リージェンツ、オブ、ザ、ユニバーシティ、オブ、カリフォルニア 高温電気化学装置用の一体化シール
JP2016207630A (ja) * 2015-04-24 2016-12-08 株式会社村田製作所 メタルサポート固体酸化物形燃料電池およびその製造方法
JP2020181763A (ja) * 2019-04-26 2020-11-05 日産自動車株式会社 メタルサポートセル接合体の形成方法、およびメタルサポートセル接合体

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008159428A (ja) * 2006-12-25 2008-07-10 Nissan Motor Co Ltd 多孔構造体、これを用いた固体電解質型燃料電池及び燃料電池スタック
JP2009146882A (ja) * 2007-10-05 2009-07-02 Topsoee Fuel Cell As 燃料電池支持体用シール
JP2011518416A (ja) * 2008-04-18 2011-06-23 ザ、リージェンツ、オブ、ザ、ユニバーシティ、オブ、カリフォルニア 高温電気化学装置用の一体化シール
JP2016207630A (ja) * 2015-04-24 2016-12-08 株式会社村田製作所 メタルサポート固体酸化物形燃料電池およびその製造方法
JP2020181763A (ja) * 2019-04-26 2020-11-05 日産自動車株式会社 メタルサポートセル接合体の形成方法、およびメタルサポートセル接合体

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