WO2023190754A1 - 電気化学セル、電気化学セル装置、モジュールおよびモジュール収容装置 - Google Patents

電気化学セル、電気化学セル装置、モジュールおよびモジュール収容装置 Download PDF

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Publication number
WO2023190754A1
WO2023190754A1 PCT/JP2023/012970 JP2023012970W WO2023190754A1 WO 2023190754 A1 WO2023190754 A1 WO 2023190754A1 JP 2023012970 W JP2023012970 W JP 2023012970W WO 2023190754 A1 WO2023190754 A1 WO 2023190754A1
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WIPO (PCT)
Prior art keywords
electrochemical cell
metal member
sealing material
cell
intermediate material
Prior art date
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Ceased
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PCT/JP2023/012970
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English (en)
French (fr)
Japanese (ja)
Inventor
和也 今仲
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Kyocera Corp
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Kyocera Corp
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Filing date
Publication date
Application filed by Kyocera Corp filed Critical Kyocera Corp
Priority to EP23780762.3A priority Critical patent/EP4478462A4/en
Priority to US18/852,415 priority patent/US20250219109A1/en
Priority to CN202380027052.5A priority patent/CN118872103A/zh
Priority to JP2024512721A priority patent/JP7714781B2/ja
Publication of WO2023190754A1 publication Critical patent/WO2023190754A1/ja
Anticipated expiration legal-status Critical
Priority to JP2025119540A priority patent/JP2025148535A/ja
Ceased legal-status Critical Current

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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
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
    • H01M8/028—Sealing means characterised by their material
    • H01M8/0282—Inorganic material
    • 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
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0204—Non-porous and characterised by the material
    • H01M8/0206—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
    • H01M8/0232—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
    • H01M8/0271—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
    • 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
    • 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 disclosure relates to an electrochemical cell, an electrochemical cell device, a module, and a module housing device.
  • a fuel cell is a type of electrochemical cell that can obtain electric power using a fuel gas such as a hydrogen-containing gas and an oxygen-containing gas such as air.
  • An electrochemical cell includes a porous portion, a metal member, a sealing material, and an intermediate material.
  • the porous portion has electrical conductivity.
  • the metal member contains chromium.
  • a sealing material is located on the porous part and on the metal member.
  • the intermediate material is located between the metal member and the sealing material.
  • the intermediate material has two or more parts having different surface roughness or thickness at different positions.
  • An electrochemical cell includes a porous portion, a metal member, a sealing material, and an intermediate material.
  • the porous portion has electrical conductivity.
  • the metal member contains chromium.
  • a sealing material is located on the porous part and on the metal member.
  • the intermediate material is located between the metal member and the sealing material. The surface roughness of a first interface of the intermediate material facing the sealing material is different from the surface roughness of a second interface of the intermediate material facing the metal member.
  • An electrochemical cell includes a porous portion, a metal member, a sealing material, and an intermediate material.
  • the porous portion has electrical conductivity.
  • the metal member contains chromium.
  • a sealing material is located on the porous part and on the metal member.
  • the intermediate material is located between the metal member and the sealing material.
  • At least one element among Mn, Ti, Ca, and Al is located at the boundary between the metal member and the intermediate material.
  • the first content which is the sum of the contents of Mn, Ti, Ca, and Al in the boundary portion, is the sum of the contents of Mn, Ti, Ca, and Al in the interior of the metal member or the interior of the intermediate material. Different from the second content rate.
  • the electrochemical cell device of the present disclosure includes a cell stack including the electrochemical cell described above.
  • a module of the present disclosure includes the electrochemical cell device described above and a storage container that houses the electrochemical cell device.
  • the module housing device of the present disclosure includes the module described above, an auxiliary machine for operating the module, and an exterior case that houses the module and the auxiliary machine.
  • FIG. 1A is a cross-sectional view showing an example of an electrochemical cell according to the first embodiment.
  • FIG. 1B is a side view of an example of the electrochemical cell according to the first embodiment, viewed from the air electrode side.
  • FIG. 1C is a side view of an example of the electrochemical cell according to the first embodiment, viewed from the interconnector side.
  • FIG. 1D is a cross-sectional view showing another example of the electrochemical cell according to the first embodiment.
  • FIG. 2A is a perspective view showing an example of the cell stack device according to the first embodiment.
  • FIG. 2B is a cross-sectional view taken along line XX shown in FIG. 2A.
  • FIG. 2C is a top view showing an example of the cell stack device according to the first embodiment.
  • FIG. 3A is an enlarged cross-sectional view of region A shown in FIG. 1A.
  • FIG. 3B is an enlarged cross-sectional view of region A shown in FIG. 1A.
  • FIG. 3C is an enlarged cross-sectional view of region A shown in FIG. 1A.
  • FIG. 3D is an enlarged cross-sectional view of region A shown in FIG. 1A.
  • FIG. 3E is an enlarged cross-sectional view of region A shown in FIG. 1A.
  • FIG. 3F is an enlarged cross-sectional view of region A shown in FIG. 1A.
  • FIG. 3G is an enlarged cross-sectional view of region A shown in FIG. 1A.
  • FIG. 3H is an enlarged cross-sectional view of region A shown in FIG. 1A.
  • FIG. 3I is an enlarged cross-sectional view of region A shown in FIG. 1A.
  • FIG. 3J is an enlarged cross-sectional view of region A shown in FIG. 1A.
  • FIG. 3K is an enlarged cross-sectional view of region B shown in FIG. 1D.
  • FIG. 3L is an enlarged cross-sectional view of region B shown in FIG. 1D.
  • FIG. 3M is an enlarged cross-sectional view of region B shown in FIG. 1D.
  • FIG. 3N is an enlarged cross-sectional view of region B shown in FIG. 1D.
  • FIG. 3O is an enlarged cross-sectional view of region B shown in FIG. 1D.
  • FIG. 3P is an enlarged cross-sectional view of region B shown in FIG. 1D.
  • FIG. 3Q is an enlarged cross-sectional view of region B shown in FIG. 1D.
  • FIG. 3R is an enlarged cross-sectional view of region B shown in FIG. 1D.
  • FIG. 3S is an enlarged cross-sectional view of region B shown in FIG. 1D.
  • FIG. 3T is an enlarged cross-sectional view of region B shown in FIG. 1D.
  • FIG. 3U is an enlarged cross-sectional view of region B shown in FIG. 1D.
  • FIG. 3V is an enlarged cross-sectional view of region B shown in FIG. 1D.
  • FIG. 3W is an enlarged cross-sectional view of region B shown in FIG. 1D.
  • FIG. 3X is an enlarged cross-sectional view of region B shown in FIG. 1D.
  • FIG. 3Y is an enlarged cross-sectional view of region B shown in FIG. 1D.
  • FIG. 4 is a sectional view showing another example of the electrochemical cell according to the first embodiment.
  • FIG. 5 is a sectional view showing another example of the electrochemical cell according to the first embodiment.
  • FIG. 6 is a sectional view showing another example of the electrochemical cell according to the first embodiment.
  • FIG. 7 is an external perspective view showing an example of the module according to the first embodiment.
  • FIG. 8 is an exploded perspective view schematically showing an example of the module housing device according to the first embodiment.
  • FIG. 9 is a cross-sectional view showing an example of an electrochemical cell according to the second embodiment.
  • FIG. 10 is an enlarged cross-sectional view of region C shown in FIG. FIG.
  • FIG. 11 is a sectional view showing another example of the electrochemical cell according to the second embodiment.
  • FIG. 12 is a sectional view showing another example of the electrochemical cell according to the second embodiment.
  • FIG. 13 is a sectional view showing another example of the electrochemical cell according to the second embodiment.
  • the above-described fuel cell stack device includes, for example, a metal member that supports a plurality of fuel cells.
  • a metal member that supports a plurality of fuel cells.
  • drawings are schematic and the dimensional relationship of each element, the ratio of each element, etc. may differ from reality. Furthermore, drawings may include portions that differ in dimensional relationships, ratios, and the like.
  • the electrochemical cell device may include a cell stack having multiple electrochemical cells.
  • An electrochemical cell device having multiple electrochemical cells is simply referred to as a cell stack device.
  • FIG. 1A is a cross-sectional view showing an example of the electrochemical cell according to the first embodiment
  • FIG. 1B is a side view of the example electrochemical cell according to the first embodiment, viewed from the air electrode side.
  • FIG. 1C is a side view of an example of the electrochemical cell according to the first embodiment, viewed from the interconnector side. Note that FIGS. 1A to 1C show enlarged portions of each structure of the electrochemical cell.
  • the electrochemical cell may be simply referred to as a cell.
  • the cell 1 is a hollow flat plate and has an elongated plate shape.
  • the shape of the entire cell 1 when viewed from the side has, for example, a side length in the length direction L of 5 cm to 50 cm, and a length in the width direction W perpendicular to the length direction L. is a rectangle with a size of 1 cm to 10 cm.
  • the overall thickness of this cell 1 in the thickness direction T is, for example, 1 mm to 5 mm.
  • the cell 1 includes a support substrate 2, an element section 3, an interconnector 4, an adhesive 9, an intermediate material 24, and a sealing material 25.
  • the support substrate 2 has a columnar shape having a pair of opposing flat surfaces n1 and n2 and a pair of arcuate side surfaces m connecting the flat surfaces n1 and n2.
  • the element section 3 is located on the flat surface n1 of the support substrate 2.
  • the element section 3 includes a fuel electrode 5, a solid electrolyte layer 6, and an air electrode 8.
  • the interconnector 4 is located on the flat surface n2 of the cell 1.
  • the cell 1 may include an intermediate layer 7 between the solid electrolyte layer 6 and the air electrode 8.
  • the air electrode 8 does not extend to the upper and lower ends of the cell 1.
  • the interconnector 4 may extend to the lower end of the cell 1.
  • the interconnector 4 and the solid electrolyte layer 6 are exposed to the surface. Both ends of the interconnector 4 in the width direction W are gas-sealed with a sealing material 25.
  • the solid electrolyte layer 6 is exposed on the surface of the pair of arcuate side faces m of the cell 1.
  • the interconnector 4 does not have to extend to the lower end of the cell 1.
  • the support substrate 2 has a gas passage 2a inside thereof through which gas flows.
  • the example of the support substrate 2 shown in FIG. 1A has six gas flow paths 2a.
  • the support substrate 2 has gas permeability and allows the fuel gas flowing through the gas flow path 2 a to pass through to the fuel electrode 5 .
  • the support substrate 2 has electrical conductivity.
  • the conductive support substrate 2 collects electricity generated in the element section 3 to the interconnector 4 .
  • the material of the support substrate 2 includes, for example, an iron group metal component and an inorganic oxide.
  • the iron group metal component may be, for example, Ni (nickel) and/or NiO.
  • the inorganic oxide may be, for example, a specific rare earth element oxide.
  • the rare earth element oxide may contain Y, for example.
  • the fuel electrode 5 may be made of porous conductive ceramics, such as ceramics containing Ni and/or NiO and an ion conductive material such as ZrO 2 in which a rare earth element oxide is solidly dissolved.
  • This rare earth element oxide includes a plurality of rare earth elements selected from, for example, Sc, Y, La, Nd, Sm, Gd, Dy, and Yb.
  • ZrO 2 containing a rare earth element oxide as a solid solution is sometimes referred to as stabilized zirconia.
  • Stabilized zirconia also includes partially stabilized zirconia.
  • the solid electrolyte layer 6 is an electrolyte and transfers ions between the fuel electrode 5 and the air electrode 8. At the same time, the solid electrolyte layer 6 has gas barrier properties, making it difficult for fuel gas and oxygen-containing gas to leak. At the same time, the solid electrolyte layer 6 has gas barrier properties, making it difficult for fuel gas and oxygen-containing gas to leak.
  • the material of the solid electrolyte layer 6 may be, for example, an ion conductive material such as ZrO 2 in which 3 mol % to 15 mol % of a rare earth element oxide is dissolved.
  • the rare earth element oxide may contain one or more rare earth elements selected from, for example, Sc, Y, La, Nd, Sm, Gd, Dy, and Yb.
  • the solid electrolyte layer 6 may include, for example, ZrO 2 in which Yb, Sc or Gd is dissolved in solid solution, CeO 2 in which La, Nd or Yb is dissolved in solid solution, BaZrO 3 in which Sc or Yb is dissolved in solid solution. It may also contain BaCeO 3 in which Sc or Yb is solidly dissolved.
  • the air electrode 8 has gas permeability.
  • the open porosity (porosity) of the air electrode 8 may be in the range of, for example, 20% to 50%, particularly 30% to 50%.
  • the material of the air electrode 8 is not particularly limited as long as it is commonly used for air electrodes.
  • the material of the air electrode 8 may be, for example, a conductive ceramic such as a so-called ABO 3 perovskite oxide.
  • the material of the air electrode 8 may be, for example, a composite oxide in which Sr (strontium) and La (lanthanum) coexist at the A site.
  • composite oxides include La x Sr 1-x Co y Fe 1-y O 3 , La x Sr 1-x MnO 3 , La x Sr 1-x FeO 3 , La x Sr 1-x Examples include CoO3 . Note that x is 0 ⁇ x ⁇ 1, and y is 0 ⁇ y ⁇ 1.
  • the intermediate layer 7 has a function as a diffusion suppressing layer.
  • the intermediate layer 7 makes it difficult for Sr (strontium) contained in the air electrode 8 to diffuse into the solid electrolyte layer 6 containing, for example, Zr, thereby making it difficult to form a resistance layer of SrZrO 3 in the solid electrolyte layer 6.
  • the material for the intermediate layer 7 is not particularly limited as long as it generally makes it difficult for elements to diffuse between the air electrode 8 and the solid electrolyte layer 6.
  • the material of the intermediate layer 7 may include, for example, cerium oxide (CeO 2 ) in which a rare earth element other than Ce (cerium) is dissolved.
  • CeO 2 cerium oxide
  • rare earth elements for example, Gd (gadolinium), Sm (samarium), etc. may be used.
  • the interconnector 4 is a dense metal member, and prevents leakage of the fuel gas flowing through the gas flow path 2a inside the support substrate 2 and the oxygen-containing gas flowing outside the support substrate 2.
  • the interconnector 4 is fixed by an adhesive 9 to a support substrate 2 having a gas flow path 2a.
  • the interconnector 4 contains chromium.
  • the interconnector 4 is made of stainless steel, for example.
  • the interconnector 4 may be made of, for example, highly heat-resistant stainless steel such as ferritic stainless steel or austenitic stainless steel.
  • the interconnector 4 may be made of, for example, a nickel-chromium alloy or an iron-chromium alloy.
  • Interconnector 4 may contain metal oxide, for example.
  • the interconnector 4 is an example of a metal member.
  • the adhesive 9 is located between the interconnector 4 and the support substrate 2.
  • Adhesive material 9 has electrical conductivity.
  • the adhesive material 9 may have gas permeability, for example.
  • the adhesive 9 may include conductive particles such as Ni, for example.
  • the adhesive 9 may contain inorganic oxides such as TiO 2 , rare earth element oxides (Y 2 O 3 , CeO 2 , etc.), transition metal oxides (Fe 2 O 3 , CuO, etc.).
  • the sealing material 25 is located on the end surface of the interconnector 4.
  • the sealing material 25 is located so as to straddle the interconnector 4 and the solid electrolyte layer 6, and seals the flow of fuel gas between the fuel electrode 5 and the adhesive material 9 and the outside.
  • the sealing material 25 has electrical insulation properties.
  • electrical insulation may be simply referred to as insulation.
  • an oxide with low conductivity such as glass can be used.
  • the material of the sealing material 25 may be, for example, amorphous glass or crystallized glass.
  • crystallized glass include SiO 2 -CaO system, MgO-B 2 O 3 system, La 2 O 3 -B 2 O 3 -MgO system, La 2 O 3 -B 2 O 3 -ZnO system, SiO 2 -CaO--ZnO-based materials may be used, and in particular, SiO 2 -MgO-based materials may be used.
  • the intermediate material 24 is located between interconnector 4 and sealing material 25.
  • the intermediate material 24 may include, for example, an insulating oxide having higher heat resistance than the sealing material 25, such as forsterite. Thereby, the intermediate material 24 improves the adhesion between the sealing material 25 and the interconnector 4, thereby increasing the durability of the cell 1.
  • the insulating oxide may have an electrical resistivity of 1 ⁇ 10 10 ⁇ m or more at room temperature, for example.
  • the intermediate material 24 is less likely to dissolve in high-temperature steam or cause components to evaporate than the sealing material 25, so that gas leakage and deterioration of electrode performance are less likely to occur.
  • the intermediate material 24 contains an oxide that makes it difficult for the chromium contained in the interconnector 4 to desorb into the oxidizing atmosphere.
  • FIG. 1D is a cross-sectional view showing another example of the electrochemical cell according to the first embodiment.
  • the length in the width direction W of the interconnector 4 is longer than the length in the width direction W of the cell 1, unlike the example shown in FIG. 1A.
  • the configuration in the example shown in FIG. 1A is applied except for the above points.
  • FIG. 2A is a perspective view showing an example of the cell stack device according to the embodiment
  • FIG. 2B is a cross-sectional view taken along the line XX shown in FIG. 2A
  • FIG. 2C is a perspective view of the cell stack device according to the embodiment. It is a top view showing an example.
  • the cell stack device 10 includes a cell stack 11 having a plurality of cells 1 arranged (stacked) in the thickness direction T of the cells 1 (see FIG. 1A), and a fixing member 12.
  • the fixing member 12 includes a fixing member 13 and a support member 14.
  • the support member 14 supports the cell 1.
  • the fixing member 13 fixes the cell 1 to the support member 14 .
  • the support member 14 includes a support body 15 and a gas tank 16.
  • the support body 15, which is the support member 14, and the gas tank 16 are made of metal and have electrical conductivity.
  • the support body 15 has an insertion hole 15a into which the lower end portions of the plurality of cells 1 are inserted.
  • the lower ends of the plurality of cells 1 and the inner wall of the insertion hole 15a are joined with a fixing material 13.
  • the gas tank 16 has an opening for supplying reaction gas to the plurality of cells 1 through the insertion hole 15a, and a groove 16a located around the opening. An end of the outer periphery of the support body 15 is joined to the gas tank 16 by a joining material 21 filled in the groove 16a of the gas tank 16.
  • fuel gas is stored in the internal space 22 formed by the support body 15, which is the support member 14, and the gas tank 16.
  • a gas flow pipe 20 is connected to the gas tank 16.
  • Fuel gas is supplied to the gas tank 16 through this gas distribution pipe 20, and from the gas tank 16 to the gas passage 2a (see FIG. 1A) inside the cell 1.
  • the fuel gas supplied to the gas tank 16 is generated in a reformer 102 (see FIG. 7), which will be described later.
  • Hydrogen-rich fuel gas can be produced by steam reforming raw fuel.
  • fuel gas is generated by steam reforming, the fuel gas contains steam.
  • FIG. 2A includes two rows of cell stacks 11, two supports 15, and a gas tank 16.
  • the two rows of cell stacks 11 each have a plurality of cells 1.
  • Each cell stack 11 is fixed to each support 15.
  • the gas tank 16 has two through holes on its upper surface.
  • Each support body 15 is arranged in each through hole.
  • Internal space 22 is formed by one gas tank 16 and two supports 15.
  • the shape of the insertion hole 15a is, for example, an oval shape when viewed from above.
  • the length of the insertion hole 15a in the arrangement direction of the cells 1, that is, the thickness direction T is larger than the distance between the two end current collecting members 17 located at both ends of the cell stack 11.
  • the width of the insertion hole 15a is, for example, larger than the length of the cell 1 in the width direction W (see FIG. 1A).
  • the joint between the inner wall of the insertion hole 15a and the lower end of the cell 1 is filled with the fixing material 13 and solidified.
  • the inner wall of the insertion hole 15a and the lower end portions of the plurality of cells 1 are respectively joined and fixed, and the lower end portions of the cells 1 are joined and fixed to each other.
  • the gas flow path 2a of each cell 1 communicates with the internal space 22 of the support member 14 at its lower end.
  • materials with low conductivity such as glass can be used.
  • amorphous glass or the like may be used, and in particular, crystallized glass or the like may be used.
  • crystallized glass examples include SiO 2 -CaO system, MgO-B 2 O 3 system, La 2 O 3 -B 2 O 3 -MgO system, La 2 O 3 -B 2 O 3 -ZnO system, SiO 2 -CaO--ZnO-based materials may be used, and in particular, SiO 2 -MgO-based materials may be used.
  • a conductive member 18 is interposed between adjacent cells 1 among the plurality of cells 1.
  • the conductive member 18 electrically connects one adjacent cell 1 and the other cell 1 in series. More specifically, the conductive member 18 connects the fuel electrode 5 of one cell 1 and the air electrode 8 of the other cell 1.
  • the end current collecting member 17 is electrically connected to the outermost cell 1 in the arrangement direction of the plurality of cells 1.
  • the end current collecting member 17 is connected to a conductive portion 19 protruding to the outside of the cell stack 11 .
  • the conductive part 19 collects electricity generated by the power generation of the cell 1 and draws it to the outside. Note that in FIG. 2A, illustration of the end current collecting member 17 is omitted.
  • the cell stack device 10 may be one battery in which two cell stacks 11A and 11B are connected in series.
  • the conductive portion 19 of the cell stack device 10 may include a positive terminal 19A, a negative terminal 19B, and a connection terminal 19C.
  • the positive electrode terminal 19A is a positive electrode for outputting the electric power generated by the cell stack 11 to the outside, and is electrically connected to the end current collecting member 17 on the positive electrode side of the cell stack 11A.
  • the negative electrode terminal 19B is a negative electrode for outputting the electric power generated by the cell stack 11 to the outside, and is electrically connected to the end current collecting member 17 on the negative electrode side of the cell stack 11B.
  • connection terminal 19C electrically connects the negative end current collecting member 17 of the cell stack 11A and the positive end current collecting member 17 of the cell stack 11B.
  • FIGS. 3A to 3Y are enlarged cross-sectional views of region A shown in FIG. 1A
  • FIGS. 3K to 3Y are enlarged cross-sectional views of region B shown in FIG. 1D.
  • the sealing material 25 is joined to the interconnector 4 via the intermediate material 24.
  • the intermediate material 24 has surfaces 241 and 242 in contact with the sealing material 25 and surfaces 243 and 244 in contact with the interconnector 4. Further, the intermediate material 24 has a surface 245 exposed to the external space 23.
  • the surfaces 242 and 244 are located along the width direction W shown in FIG. 1A, and the surfaces 241 and 243 are located along the thickness direction T shown in FIG. 1A.
  • the external space 23 is a space where the air electrode 8 (see FIG. 1A) of the cell 1 is exposed, and is filled with an oxygen-containing gas such as air. That is, the external space 23 is an oxidizing atmosphere.
  • the interconnector 4 contains chromium. For example, if chromium contained in the interconnector 4 is released into the oxidizing atmosphere (external space 23), the durability of the interconnector 4 may be reduced.
  • the surface roughness of the intermediate material 24 located near the oxidizing atmosphere (external space 23) is changed from the surface roughness of the intermediate material 24 located near the supporting substrate 2 which is far from the oxidizing atmosphere (external space 23), that is, in the reducing atmosphere.
  • the surface roughness can be made smaller than the surface roughness of the material 24.
  • the surface roughness of surface 245 is less than the surface roughness of surface 241.
  • the surface roughness of the surface 245 located near the oxidizing atmosphere may be smaller than, for example, the normal surface roughness of 8 ⁇ m to 30 ⁇ m that an insulating oxide such as forsterite provided on a metal surface has.
  • the surface roughness of surface 241 may be the same as or greater than the normal surface roughness of such insulating oxides.
  • surface roughness of the surface 242 located between the surfaces 241 and 245 may be the same as the surface roughness of the surface 241 or the surface roughness of the surface 245. Additionally, surface 242 may have a surface roughness intermediate between surface 241 and surface 245.
  • the sealing material 25 is joined to the intermediate material 24, and depending on the operating environment, fuel gas may leak from the gap created by the separation of the sealing material 25 from the intermediate material 24, reducing the durability of the cell stack device 10. there is a possibility.
  • the surface roughness of the surface 242 can be made larger than the surface roughness of the surface 241.
  • the adhesion between the surface 242 of the intermediate material 24 and the sealing material 25 can be improved.
  • the sealing material 25 is less likely to peel off from the side of the surface 242 that is close to the surface 245 exposed to the oxidizing atmosphere (external space 23), making it difficult for fuel gas to leak. Therefore, according to this embodiment, the durability of the cell stack device 10 can be improved.
  • the sealing material 25 is also in contact with the surface 241. If the surface roughness of the surface 241 is large, the adhesion between the surface 241 and the sealing material 25 can be improved.
  • the surface roughness of surfaces 242 and 245 may be greater than the normal surface roughness of the insulating oxide described above.
  • a sealing material 25 or adhesive material 9 may be located between the intermediate material 24 and the solid electrolyte layer 6, between each component of the cell 1, etc. Furthermore, as shown in FIGS. 3G to 3J, a gap S may exist between the sealing material 25 and each component of the cell 1. Even in such a case, the durability of the cell stack device 10 can be improved as shown in FIG. 3A.
  • a sealing material 25 or adhesive material 9 may be located between the intermediate material 24 and the solid electrolyte layer 6, between each component of the cell 1, etc. Further, as shown in FIGS. 3T to 3Y, a gap S may exist between the sealing material 25 and each component of the cell 1. Even in such a case, the durability of the cell stack device 10 can be improved as shown in FIG. 3A.
  • the durability of the cell 1 is increased by having regions with different surface roughness at different positions of the intermediate material 24, but by having regions with different thicknesses at different positions of the intermediate material 24. This also increases the durability of the cell 1.
  • FIG. 4 is a sectional view showing another example of the electrochemical cell according to the first embodiment.
  • the intermediate member 24 may have a first portion P1 and a second portion P2.
  • the first portion P1 is located between the surfaces 241 and 243, and the second portion P2 is located between the surfaces 242 and 244.
  • the second site P2 is a site close to the oxidizing atmosphere (external space 23).
  • the first site P1 is further away from the oxidizing atmosphere (external space 23) than the second site P2 and is closer to the supporting substrate 2, which is a reducing atmosphere.
  • the intermediate material 24 may have a thickness t2, which is the average thickness of the second portion P2, larger than a thickness t1, which is the average thickness of the first portion P1.
  • a thickness t2 which is the average thickness of the second portion P2
  • a thickness t1 which is the average thickness of the first portion P1.
  • FIG. 5 is a sectional view showing another example of the electrochemical cell according to the first embodiment.
  • the intermediate material 24 may increase the durability of the cell 1 by having a first interface 24a facing the sealing material 25 and a second interface 24b facing the interconnector 4 having different surface roughnesses.
  • the surface roughness of the first interface 24a may be greater than the surface roughness of the second interface 24b.
  • the adhesion between the intermediate material 24 and the sealing material 25 can be improved. Therefore, the sealing material 25 is less likely to peel off from the intermediate material 24, making it difficult for fuel gas to leak. Therefore, according to this configuration, since the durability of the cell 1 can be increased, the durability of the cell stack device 10 can be increased.
  • the first interface 24a includes interfaces 24a1 and 24a2, and the second interface 24b includes interfaces 24b1 and 24b2.
  • the surface roughness of the first interface 24a can be, for example, the average value of the surface roughness of the interfaces 24a1 and 24a2.
  • the surface roughness of the second interface 24b can be, for example, the average value of the surface roughness of the interfaces 24b1 and 24b2.
  • the sealing material 25 is more likely to peel off from the interface 24a2 side of the intermediate material 24 than from the interface 24a1.
  • the surface roughness of the interface 24a2 may be greater than the surface roughness of the interface 24b2. This makes it difficult for the sealing material 25 to peel off from the interface 24a2 side, making it difficult for fuel gas to leak. Therefore, since the durability of the cell 1 can be increased, the durability of the cell stack device 10 can be increased.
  • FIG. 6 is a sectional view showing another example of the electrochemical cell according to the first embodiment.
  • the durability of the cell 1 can be improved by adjusting the content of a specific metal element located at the boundary between the interconnector 4 and the intermediate material 24 and making it different from the content of the metal element in the interconnector 4 or the intermediate material 24. It may be increased.
  • the boundary between the interconnector 4 and the intermediate material 24 is a portion of the interconnector 4 and the intermediate material 24 that are located near the interface between the interconnector 4 and the intermediate material 24; including the interface.
  • the first content rate which is the total content rate of Mn, Ti, Ca, and Al in the vicinity of the interface 24i, is the total content rate of Mn, Ti, Ca, and Al in the interior of the interconnector 4 or the interior of the intermediate material 24.
  • the second content may be higher than the second content.
  • the inside of the interconnector 4 may refer to a portion of the interconnector 4 that is sufficiently far away from the interface 24i, for example, a portion that is equidistant from the intermediate material 24 and the adhesive 9, or a portion that is closer to the adhesive 9. .
  • the inside of the intermediate member 24 may be a portion of the intermediate member 24 that is sufficiently far away from the interface 24i, for example, a portion that is equidistant from the interconnector 4 and the sealing material 25, or a portion that is closer to the sealing material 25. Further, the vicinity of the interface 24i may be, for example, a region where the distance from the interface 24i is 300 nm or less.
  • the adhesion between the interconnector 4 and the intermediate material 24 can be improved. Therefore, the interconnector 4 and the intermediate material 24 are less likely to separate, and fuel gas is less likely to leak. Therefore, since the durability of the cell 1 can be increased, the durability of the cell stack device 10 can be increased.
  • the above-mentioned specific element located near the interface 24i can be located as a simple substance, an alloy, or a metal oxide. Moreover, such an element may be located on either the interconnector 4 side or the intermediate material 24 side, or may be located so as to straddle the interconnector 4 and the intermediate material 24. Further, such an element may be located over the entire interface 24i, or may be located only on one of the interface 24i1 or the interface 24i2, for example.
  • FIG. 7 is an external perspective view showing the module according to the first embodiment.
  • FIG. 7 shows a state in which the front and rear surfaces, which are part of the storage container 101, are removed and the fuel cell cell stack device 10 housed inside is taken out rearward.
  • the module 100 includes a storage container 101 and a cell stack device 10 housed within the storage container 101. Further, above the cell stack device 10, a reformer 102 is arranged.
  • the reformer 102 generates fuel gas by reforming raw fuel such as natural gas or kerosene, and supplies the fuel gas to the cell 1.
  • Raw fuel is supplied to the reformer 102 through a raw fuel supply pipe 103.
  • the reformer 102 may include a vaporizing section 102a that vaporizes water, and a reforming section 102b.
  • the reforming section 102b includes a reforming catalyst (not shown), and reformes the raw fuel into fuel gas.
  • Such a reformer 102 can perform steam reforming, which is a highly efficient reforming reaction.
  • the fuel gas generated in the reformer 102 is supplied to the gas flow path 2a of the cell 1 (see FIG. 1A) through the gas distribution pipe 20, the gas tank 16, and the support member 14.
  • the temperature inside the module 100 during normal power generation is approximately 500° C. to 1000° C. due to combustion of gas and power generation in the cell 1.
  • the module 100 can have high durability.
  • FIG. 8 is an exploded perspective view showing an example of the module housing device according to the first embodiment.
  • the module housing device 110 according to this embodiment includes an exterior case 111, the module 100 shown in FIG. 7, and an auxiliary device not shown.
  • the auxiliary machine operates the module 100.
  • the module 100 and auxiliary equipment are housed in an exterior case 111. Note that in FIG. 8, some configurations are omitted.
  • the exterior case 111 of the module housing device 110 shown in FIG. 8 includes a support 112 and an exterior plate 113.
  • the partition plate 114 divides the interior of the exterior case 111 into upper and lower sections.
  • the space above the partition plate 114 in the exterior case 111 is a module storage chamber 115 that accommodates the module 100, and the space below the partition plate 114 in the exterior case 111 accommodates auxiliary equipment that operates the module 100.
  • This is the auxiliary equipment storage chamber 116. Note that, in FIG. 8, the auxiliary equipment accommodated in the auxiliary equipment storage chamber 116 is omitted.
  • the partition plate 114 has an air flow port 117 for flowing air from the auxiliary equipment storage chamber 116 to the module storage chamber 115 side.
  • the exterior plate 113 configuring the module storage chamber 115 has an exhaust port 118 for exhausting the air inside the module storage chamber 115 .
  • the module accommodating device 110 by providing the highly durable modules 100 in the module accommodating chamber 115 as described above, the module accommodating device 110 can have high durability.
  • FIG. 9 is a cross-sectional view showing an example of an electrochemical cell according to the second embodiment.
  • the cell 1A includes an element section 3, a support substrate 2, an adhesive 9, an interconnector 4, a sealing material 25, and an intermediate material 44.
  • the support substrate 2 is a flat metal plate having one side and the other side opposite thereto.
  • the support substrate 2 has a gas flow path 2a on one side.
  • the element section 3 is located on the other side of the support substrate 2.
  • the support substrate 2 has through-holes or pores at a portion in contact with the element section 3, and allows gas to flow between the gas flow path 2a and the element section 3.
  • the material of the metal plate may be the same or similar material to the interconnector 4 containing chromium.
  • the support substrate 2 is an example of a metal member.
  • the interconnector 4 is provided on one side of the support substrate 2 where the gas flow path 2a is located.
  • the sealing material 25 is located on the end surfaces of the element portion 3 and the adhesive material 9.
  • the sealing material 25 fixes the element section 3 and the support substrate 2 and makes it difficult for fuel gas to leak.
  • the sealing material 25 may be located apart from the air electrode 8.
  • the intermediate material 44 is located between the support substrate 2 and the sealing material 25. Since the intermediate material 44 increases the adhesion between the sealing material 25 and the support substrate 2, it is possible to increase the durability of the cell 1A.
  • the material of the intermediate material 44 may be the same as the material of the intermediate material 24 according to the embodiment described above.
  • FIG. 10 is an enlarged cross-sectional view of region C shown in FIG. As shown in FIG. 10, the sealing material 25 is joined to the support substrate 2 via an intermediate material 44.
  • the intermediate material 44 has a surface 441 in contact with the sealing material 25, a surface 442 in contact with the support substrate 2, and a surface 443 in contact with the adhesive material 9. Moreover, the intermediate material 44 has a surface 444 located on the external space 23 side.
  • the support substrate 2 contains chromium.
  • the durability of the support substrate 2 may be reduced.
  • the surface roughness of the intermediate material 44 located near the oxidizing atmosphere (external space 23) is changed to The surface roughness of the intermediate material 44, which is closer to 9, can be made smaller than that of the intermediate material 44.
  • the surface roughness of surface 444 is less than the surface roughness of surface 443.
  • the durability of the cell 1A can be increased, so that the durability of the cell stack device 10 can be increased.
  • surface roughness of the surface 441 located between the surfaces 444 and 443 may be the same as the surface roughness of the surface 444 or the surface roughness of the surface 443. Additionally, surface 441 may have a surface roughness intermediate between surface 444 and surface 443.
  • the sealing material 25 is joined to the intermediate material 44, and depending on the operating environment, fuel gas may leak from the gap created by the separation of the sealing material 25 from the intermediate material 44, reducing the durability of the cell stack device 10. there is a possibility.
  • the surface roughness of the surface 441 can be made larger than the surface roughness of the surface 444.
  • the adhesion between the surface 441 of the intermediate material 44 and the sealing material 25 can be improved.
  • the sealing material 25 is less likely to peel off from the surface 441 located on the side of the surface 444 exposed to the oxidizing atmosphere (external space 23), making it difficult to cause fuel gas leakage. Therefore, according to this embodiment, the durability of the cell stack device 10 can be improved.
  • the durability of the cell 1A is increased by having regions with different surface roughness at different positions of the intermediate material 44, but having regions with different thicknesses at different positions of the intermediate material 44 This also increases the durability of the cell 1A.
  • FIG. 11 is a sectional view showing another example of the electrochemical cell according to the second embodiment.
  • the intermediate member 44 shown in FIG. 11 has a surface 443 as a first portion and a surface 444 as a second portion.
  • the surface 444 is a region close to the oxidizing atmosphere (external space 23).
  • the surface 443 is further away from the oxidizing atmosphere (external space 23) than the surface 444, and is closer to the supporting substrate 2, which is a reducing atmosphere.
  • the intermediate material 44 may have a thickness t22, which is the average thickness of the surface 444, larger than a thickness t21, which is the average thickness of the surface 443.
  • a thickness t22 which is the average thickness of the surface 444
  • a thickness t21 which is the average thickness of the surface 443.
  • FIG. 12 is a cross-sectional view showing another example of the electrochemical cell according to the second embodiment.
  • the intermediate material 44 has different surface roughness between a first interface 44a facing the sealing material 25 of the intermediate material 44 and a second interface 44b facing the support substrate 2 of the intermediate material 44, thereby improving the durability of the cell 1A. You can increase your sexuality.
  • the surface roughness of the first interface 44a may be greater than the surface roughness of the second interface 44b.
  • the adhesion between the intermediate material 44 and the sealing material 25 can be improved. Therefore, the sealing material 25 is less likely to peel off from the intermediate material 44, and leakage of fuel gas can be prevented. Therefore, according to this configuration, since the durability of the cell 1A can be increased, the durability of the cell stack device 10 can be increased.
  • FIG. 13 is a cross-sectional view showing another example of the electrochemical cell according to the second embodiment.
  • the durability of the cell 1B can be improved by adjusting the content of a specific metal element located at the boundary between the support substrate 2 and the intermediate material 44 and making it different from the content of the metal element in the support substrate 2 or the intermediate material 44. It may be increased.
  • At least one element among Mn, Ti, Ca, and Al is located near the interface 44i that is the boundary between the support substrate 2 and the intermediate material 44.
  • the first content which is the sum of the contents of Mn, Ti, Ca, and Al in the vicinity of the interface 44i, is the sum of the contents of Mn, Ti, Ca, and Al inside the support substrate 2 or inside the intermediate material 44.
  • the second content may be higher than the second content.
  • the adhesion between the support substrate 2 and the intermediate material 44 can be improved. Therefore, the support substrate 2 and the intermediate material 44 are less likely to separate from each other, and leakage of fuel gas is less likely to occur. Therefore, since the durability of the cell 1A can be increased, the durability of the cell stack device 10 can be increased.
  • the above-mentioned specific element located near the interface 44i can be located as a simple substance, an alloy, or a metal oxide. Moreover, such an element may be located on either the support substrate 2 side or the intermediate material 44 side, or may be located so as to straddle the support substrate 2 and the intermediate material 44. Further, such an element may be located over the entire interface 44i, or may be located, for example, only in a portion of the interface 44i.
  • the thickness of each portion of the intermediate materials 24, 44 described above is calculated by image analysis of a cross section perpendicular to the surface of each portion.
  • the intermediate materials 24, 44, interconnector 4, support substrate 2, and sealing material 25 are cut out, embedded in resin, and a cross section perpendicular to the surface of each part is polished using abrasive grains, wrapping film (about #8000), etc. and polish it to obtain a mirror-like cross section.
  • the thickness of each portion can be measured by photographing the obtained cross section using a SEM (scanning electron microscope), an optical microscope, or the like, and analyzing the obtained image.
  • the thickness of each part of the intermediate materials 24 and 44 can be made into the average value of the thickness measured at arbitrary three places of each part, for example.
  • the magnitude of the surface roughness of each surface of the intermediate materials 24 and 44 described above can be determined based on the arithmetic mean roughness Ra defined in JIS B0633; 2001.
  • the arithmetic mean roughness Ra can be calculated by image analysis of a cross section perpendicular to each surface whose surface roughness is to be measured, as in the case of measuring the thickness of each part.
  • the surface roughness of each surface of the intermediate materials 24, 44 can be, for example, an average value of surface roughnesses measured at three arbitrary locations on each surface.
  • the content of Mn, Ti, Ca, and Al in each part of the intermediate materials 24, 44, interconnector 4, support substrate 2, and sealing material 25 can be determined by cutting or scraping each part from the cells 1, 1A, for example, This can be confirmed by elemental analysis such as ICP emission spectrometry.
  • elemental analysis such as ICP emission spectrometry.
  • whether or not a specific element is present at the boundary between each member can be determined using a scanning electron microscope (SEM), transmission electron microscope (TEM), or scanning transmission electron microscope (STEM), and an electron probe microanalyzer. This can be determined by elemental analysis of a cross section including the boundary using (EPMA), wavelength dispersive X-ray spectroscopy (WDS), or energy dispersive X-ray spectroscopy (EDS), such as specific elemental mapping. .
  • SEM scanning electron microscope
  • TEM transmission electron microscope
  • STEM scanning transmission electron microscope
  • EDS energy dispersive X-ray spectroscopy
  • the contents of Mn, Ti, Ca, and Al in each member and the boundary between each member can be determined by measuring the cross sections of the intermediate materials 24, 44, interconnector 4, support substrate 2, and sealing material 25 using an electronic probe microanalyzer ( It can be calculated by elemental analysis using EPMA), wavelength dispersive X-ray spectroscopy (WDS), energy dispersive X-ray spectroscopy (EDS), or the like.
  • EPMA electronic probe microanalyzer
  • the thickness of the intermediate materials 24, 44 calculated as described above can be, for example, 2 ⁇ m to 400 ⁇ m on average for the entire intermediate materials 24, 44.
  • the surface roughness (arithmetic mean roughness Ra) of each surface of the intermediate materials 24, 44 calculated as described above may be, for example, 0.1 ⁇ m to 30 ⁇ m.
  • the surface roughness (arithmetic mean roughness Ra) of some of the surfaces of the intermediate materials 24, 44 may be, for example, 0.1 ⁇ m to 30 ⁇ m.
  • the content of Mn, Ti, Ca and Al in each portion of the intermediate materials 24, 44, interconnector 4, support substrate 2, and sealing material 25 calculated as described above is, for example, 0.01% by mass to 10% by mass. %. Further, the contents of Mn, Ti, Ca, and Al in the intermediate materials 24, 44, the interconnector 4, the support substrate 2, and the boundaries between the intermediate materials 24, 44 and the interconnector 4, the support substrate 2 are, for example, 0. .01 mass% to 10 mass% (intermediate material 24, 44), 0.01 mass% to 10 mass% (interconnector 4, support substrate 2), 0.1 mass% to 30 mass% (boundary part) be able to.
  • the intermediate members 24 and 44 according to the embodiment can be positioned by, for example, a thermal spraying method, a vapor deposition method, an electrodeposition method, a sputtering method, or the like.
  • a coating material may be applied to the surface of the interconnector 4 or the support substrate 2, and then fired to form the intermediate materials 24, 44.
  • each surface of the intermediate materials 24, 44 and/or the thickness of each portion of the intermediate materials 24, 44 may be polished to a desired value, for example.
  • desired values may be obtained by changing various conditions during the formation of the intermediate materials 24, 44 described above.
  • other aspects can be formed by appropriately combining the above-described manufacturing method of the intermediate materials 24, 44 and known techniques.
  • a fuel cell, a fuel cell stack device, a fuel cell module, and a fuel cell device are shown as examples of an “electrochemical cell,” an “electrochemical cell device,” a “module,” and a “module housing device.”
  • an electrolytic cell has a first electrode and a second electrode, and decomposes water vapor into hydrogen and oxygen or decomposes carbon dioxide into carbon monoxide and oxygen by supplying electric power.
  • an oxide ion conductor or a hydrogen ion conductor is shown as an example of the electrolyte material of the electrochemical cell, but a hydroxide ion conductor may also be used. Durability can also be improved in such electrolytic cells, electrolytic cell stack devices, electrolytic modules, and electrolytic devices.
  • the electrochemical cell for example, cell 1
  • the electrochemical cell includes a porous part (for example, support substrate 2), a metal member (for example, interconnector 4), and a sealing material (for example, sealing material 25) and an intermediate material (for example, intermediate material 24).
  • the porous portion has electrical conductivity.
  • the metal member contains chromium.
  • the sealing material is located on the porous part and on the metal member.
  • the intermediate material is located between the metal member and the sealing material.
  • the intermediate material has two or more parts having different surface roughness or thickness at different positions. Thereby, the durability of the electrochemical cell can be improved.
  • the electrochemical cell for example, cell 1
  • the electrochemical cell includes a porous part (for example, support substrate 2), a metal member (for example, interconnector 4), and a sealing material (for example, sealing material 25). , and an intermediate material (for example, intermediate material 24).
  • the porous portion has electrical conductivity.
  • the metal member contains chromium.
  • the sealing material is located on the porous part and on the metal member.
  • the intermediate material is located between the metal member and the sealing material.
  • the surface roughness of the first interface facing the sealing material of the intermediate material is different from the surface roughness of the second interface facing the metal member of the intermediate material. Thereby, the durability of the electrochemical cell can be improved.
  • the electrochemical cell for example, cell 1
  • the electrochemical cell includes a porous part (for example, support substrate 2), a metal member (for example, interconnector 4), and a sealing material (for example, sealing material 25). , and an intermediate material (for example, intermediate material 24).
  • the porous portion has electrical conductivity.
  • the metal member contains chromium.
  • the sealing material is located on the porous part and on the metal member.
  • the intermediate material is located between the metal member and the sealing material. At least one element among Mn, Ti, Ca, and Al is located at the boundary between the metal member and the intermediate material.
  • the first content which is the sum of the contents of Mn, Ti, Ca, and Al in the boundary part
  • is the second content which is the sum of the contents of Mn, Ti, Ca, and Al in the interior of the metal member or the intermediate material. different from the rate. Thereby, the durability of the electrochemical cell can be improved.
  • the electrochemical cell device for example, cell stack device 10
  • the electrochemical cell device has a cell stack including the electrochemical cell described above. This makes it possible to provide an electrochemical cell device with high durability.
  • the module 100 of the present disclosure includes the electrochemical cell device described above and a storage container 101 that houses the electrochemical cell device. This allows the module 100 to have high durability.
  • the module housing device 110 of the present disclosure includes the module 100 described above, an auxiliary machine for operating the module 100, and an exterior case that houses the module 100 and the auxiliary machine. This allows the module housing device 110 to have high durability.

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PCT/JP2023/012970 2022-03-31 2023-03-29 電気化学セル、電気化学セル装置、モジュールおよびモジュール収容装置 Ceased WO2023190754A1 (ja)

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EP23780762.3A EP4478462A4 (en) 2022-03-31 2023-03-29 ELECTROCHEMICAL CELL, ELECTROCHEMICAL CELL DEVICE, MODULE AND MODULE RECEIVING DEVICE
US18/852,415 US20250219109A1 (en) 2022-03-31 2023-03-29 Electrochemical cell, electrochemical cell device, module and module housing device
CN202380027052.5A CN118872103A (zh) 2022-03-31 2023-03-29 电化学单电池、电化学单电池装置、模块以及模块容纳装置
JP2024512721A JP7714781B2 (ja) 2022-03-31 2023-03-29 電気化学セル、電気化学セル装置、モジュールおよびモジュール収容装置
JP2025119540A JP2025148535A (ja) 2022-03-31 2025-07-16 電気化学セル、電気化学セル装置、モジュールおよびモジュール収容装置

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