WO2024143416A1 - Élément électroconducteur, dispositif à cellule électrochimique, module et dispositif de réception de module - Google Patents

Élément électroconducteur, dispositif à cellule électrochimique, module et dispositif de réception de module Download PDF

Info

Publication number
WO2024143416A1
WO2024143416A1 PCT/JP2023/046792 JP2023046792W WO2024143416A1 WO 2024143416 A1 WO2024143416 A1 WO 2024143416A1 JP 2023046792 W JP2023046792 W JP 2023046792W WO 2024143416 A1 WO2024143416 A1 WO 2024143416A1
Authority
WO
WIPO (PCT)
Prior art keywords
cell
layer
conductive member
coating
module
Prior art date
Application number
PCT/JP2023/046792
Other languages
English (en)
Japanese (ja)
Inventor
貴弘 小見山
章洋 原
篤輝 山口
Original Assignee
京セラ株式会社
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 京セラ株式会社 filed Critical 京セラ株式会社
Publication of WO2024143416A1 publication Critical patent/WO2024143416A1/fr

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/02—Hydrogen or oxygen
    • C25B1/04—Hydrogen or oxygen by electrolysis of water
    • C25B1/042—Hydrogen or oxygen by electrolysis of water by electrolysis of steam
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/60—Constructional parts of cells
    • C25B9/65—Means for supplying current; Electrode connections; Electric inter-cell connections
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/70—Assemblies comprising two or more cells
    • C25B9/73—Assemblies comprising two or more cells of the filter-press type
    • C25B9/77—Assemblies comprising two or more cells of the filter-press type having diaphragms
    • 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
    • H01M8/0221—Organic resins; Organic polymers
    • 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
    • H01M8/0223—Composites
    • H01M8/0228—Composites in the form of layered or coated products
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present disclosure relates to conductive members, electrochemical cell devices, modules, and module housing devices.
  • a fuel cell is a type of electrochemical cell that can generate electricity using a fuel gas such as a hydrogen-containing gas and an oxygen-containing gas such as air.
  • a conductive member includes a metal substrate containing chromium, and a coating containing chromium oxide and disposed on a surface of the substrate, the coating having a first portion and a second portion in which t h /t a is smaller than that of the first portion, where t a is an arithmetic mean thickness of the coating and t h is a harmonic mean thickness of the coating.
  • a conductive member includes a metal substrate containing chromium, and a coating containing chromium oxide and disposed on a surface of the substrate, the coating having a portion where t h /t a is 0.95 or less, where t a is an arithmetic mean thickness of the coating and th is a harmonic mean thickness of the coating.
  • the module of the present disclosure also includes the electrochemical cell device described above and a storage container for storing the electrochemical cell device.
  • the module housing device of the present disclosure also includes the module described above, auxiliary equipment for operating the module, and an exterior case that houses the module and auxiliary equipment.
  • FIG. 1A is a cross-sectional view illustrating an example of an electrochemical cell according to a first embodiment.
  • FIG. 1B is a side view of an example of the electrochemical cell according to the first embodiment, as viewed from the air electrode side.
  • FIG. 1C is a side view of an example of an electrochemical cell according to the first embodiment, viewed from the interconnector side.
  • FIG. 2A is a perspective view showing an example of an electrochemical cell 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 illustrating an example of the electrochemical cell device according to the first embodiment.
  • FIG. 1A is a cross-sectional view illustrating an example of an electrochemical cell according to a first embodiment.
  • FIG. 1B is a side view of an example of the electrochemical cell according to the first embodiment, as viewed from the air electrode side.
  • FIG. 1C is a side view of an example
  • FIG. 3A is a cross-sectional view showing an example of an electrochemical cell device according to the first embodiment.
  • FIG. 3B is a cross-sectional view taken along line AA shown in FIG. 3A.
  • FIG. 4 is an enlarged view of region B shown in FIG. 3B.
  • FIG. 5 is an external perspective view illustrating an example of a module according to the first embodiment.
  • FIG. 6 is an exploded perspective view illustrating an example of a module housing device according to the first embodiment.
  • FIG. 7A is a cross-sectional view showing an example of an electrochemical cell device according to the second embodiment.
  • FIG. 7B is a cross-sectional view showing another example of the electrochemical cell device according to the second embodiment.
  • FIG. 8A is an enlarged cross-sectional view taken along line DD shown in FIG.
  • the internal resistance of the conductive material joined to the fuel cell increases, which can lead to a decrease in power generation performance.
  • the electrochemical cell device may include a cell stack having a plurality of electrochemical cells.
  • An electrochemical cell device having a plurality of electrochemical cells will be simply referred to as a cell stack device.
  • 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 an electrochemical cell according to the first embodiment, viewed from the air electrode side.
  • FIG. 1C is a side view of an example of an electrochemical cell according to the first embodiment, viewed from the interconnector side. Note that FIGS. 1A to 1C show enlarged views of a portion of each component of the electrochemical cell.
  • the electrochemical cell may also be simply referred to as a cell.
  • cell 1 is a hollow flat plate-like elongated plate.
  • the shape of cell 1 as a whole viewed from the side is, for example, a rectangle with 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 of, for example, 1 cm to 10 cm.
  • the overall thickness of cell 1 in the thickness direction T is, for example, 1 mm to 5 mm.
  • the cell 1 includes a conductive support substrate 2, an element section 3, and an interconnector 4.
  • the support substrate 2 is columnar, having a pair of opposing first and second surfaces n1 and n2, and a pair of arc-shaped side surfaces m connecting the first and second surfaces n1 and n2.
  • the element section 3 is located on the first surface n1 of the support substrate 2.
  • the element section 3 has a fuel electrode 5, a solid electrolyte layer 6, and an air electrode 8.
  • the interconnector 4 is located on the second surface n2 of the cell 1.
  • the cell 1 may also have an intermediate layer 7 between the solid electrolyte layer 6 and the air electrode 8.
  • the air electrode 8 does not extend to the lower end of the cell 1.
  • the air electrode 8 does not extend to the lower end 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 on the surface.
  • the solid electrolyte layer 6 is exposed on the surface of a pair of arc-shaped 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 gas flow paths 2a therein 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 gas flowing through the gas flow paths 2a to pass through to the fuel electrode 5.
  • the support substrate 2 may be conductive.
  • 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 include, for example, one or more rare earth elements selected from Sc, Y, La, Nd, Sm, Gd, Dy, and Yb.
  • the material of the fuel electrode 5 may be a generally known material.
  • the fuel electrode 5 may be a porous conductive ceramic containing a material having electronic conductivity and a material having ion conductivity.
  • a ceramic containing calcium oxide, magnesium oxide, or ZrO 2 in which a rare earth element oxide is solid-dissolved, and Ni and/or NiO may be used.
  • the rare earth element oxide may contain a plurality of rare earth elements selected from Sc, Y, La, Nd, Sm, Gd, Dy, and Yb. Calcium oxide, magnesium oxide, or ZrO 2 in which a rare earth element oxide is solid-dissolved may be referred to as stabilized zirconia.
  • the stabilized zirconia may include 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 leakage of fuel gas and oxygen-containing gas to occur.
  • the material of the solid electrolyte layer 6 may be, for example, ZrO 2 in which 3 mol % to 15 mol % of a rare earth element oxide is dissolved.
  • the rare earth element oxide may include, for example, one or more rare earth elements selected from 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, CeO 2 in which La, Nd, or Yb is dissolved, BaZrO 3 in which Sc or Yb is dissolved, or BaCeO 3 in which Sc or Yb is dissolved.
  • the air electrode 8 is gas permeable.
  • the open porosity of the air electrode 8 may be, for example, in the range of 20% to 50%, particularly 30% to 50%.
  • the open porosity of the air electrode 8 may also be referred to as the void ratio of the air electrode 8.
  • 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 LaxSr1 - xCoyFe1 -yO3 , LaxSr1 - xMnO3 , LaxSr1 - xFeO3 , and LaxSr1 - xCoO3 , where x is 0 ⁇ x ⁇ 1 and y is 0 ⁇ y ⁇ 1.
  • the material of 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 contain, for example, cerium oxide (CeO 2 ) in which a rare earth element other than Ce (cerium) is dissolved.
  • CeO 2 cerium oxide
  • a rare earth element for example, Gd (gadolinium), Sm (samarium), etc. may be used.
  • Lanthanum chromite-based perovskite oxide LaCrO3 -based oxide
  • lanthanum strontium titanium-based perovskite oxide LaSrTiO3 -based oxide
  • These materials are conductive and are not easily reduced or oxidized even when they come into contact with a fuel gas such as a hydrogen-containing gas and an oxygen-containing gas such as air.
  • Figure 2A is a perspective view showing an example of an electrochemical cell device according to the first embodiment.
  • Figure 2B is a cross-sectional view taken along line XX shown in Figure 2A.
  • Figure 2C is a top view showing an example of an electrochemical cell device according to the first embodiment.
  • the fixing member 12 has a fixing material 13 and a support member 14.
  • the support member 14 supports the cell 1.
  • the fixing material 13 fixes the cell 1 to the support member 14.
  • the support member 14 also has a support 15 and a gas tank 16.
  • the support 15 and the gas tank 16, which are the support member 14, are made of metal and are conductive.
  • the support 15 has insertion holes 15a into which the lower ends of the multiple cells 1 are inserted.
  • the lower ends of the multiple cells 1 and the inner wall of the insertion holes 15a are joined with a fixing material 13.
  • the gas tank 16 has an opening for supplying reactive gas to the multiple cells 1 through the insertion holes 15a, and a groove 16a located around the opening.
  • the outer peripheral edge of the support 15 is joined to the gas tank 16 by a bonding material 21 filled in the groove 16a of the gas tank 16.
  • Hydrogen-rich fuel gas can be produced by, for example, steam reforming the raw fuel.
  • fuel gas is produced by steam reforming, the fuel gas contains water vapor.
  • FIG. 2A includes two rows of cell stacks 11, two supports 15, and a gas tank 16.
  • Each of the two rows of cell stacks 11 has a plurality of cells 1.
  • Each cell stack 11 is fixed to each of the supports 15.
  • the gas tank 16 has two through holes on the top surface.
  • Each of the supports 15 is disposed in each of the through holes.
  • the 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, i.e., the thickness direction T, may be greater 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 may be greater 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 a fixing material 13 and solidified. This bonds and fixes the inner wall of the insertion hole 15a to the lower ends of the multiple cells 1, and also bonds and fixes the lower ends of the cells 1 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.
  • the fixing material 13 and the bonding material 21 may be made of a material with low electrical conductivity, such as glass.
  • Specific materials for the fixing material 13 and the bonding material 21 may include amorphous glass, and in particular, crystallized glass.
  • the cell stack device 10 has cells 1a and 1b adjacent to each other in the thickness direction T, and a conductive member 18 located between cells 1a and 1b.
  • the substrate 40 is a metal member containing chromium.
  • the substrate 40 is, for example, stainless steel.
  • the substrate 40 may contain, for example, a metal oxide.
  • the second layer 42 is located on the first layer 41.
  • the second layer 42 has a conductive oxide.
  • Such an oxide may contain, for example, Mn (manganese) and Co (cobalt).
  • the oxide may also contain elements other than Mn and Co, for example, Zn (zinc) and Al (aluminum).
  • Such an oxide may be a composite oxide having a spinel structure.
  • Zn(Co x Mn 1-x ) 2 O 4 (0 ⁇ x ⁇ 1) such as ZnMnCoO 4 , Mn 1.5 Co 1.5 O 4 , MnCo 2 O 4 , CoMn 2 O 4 , and the like may be used.
  • the second layer 42 can be formed on the surface of the first layer 41 by a deposition method such as IAD (Ion-beam Assisted Deposition), MOD, sputtering, AD (Aerosol Deposition), or PLD (Pulsed Laser Deposition).
  • a deposition method such as IAD (Ion-beam Assisted Deposition), MOD, sputtering, AD (Aerosol Deposition), or PLD (Pulsed Laser Deposition).
  • the thickness of the first layer 41 is made different for each portion, thereby reducing the increase in internal resistance in the conductive member 18.
  • the conductive member 18 has portions 41a and 41b having different values of t h /t a .
  • the t h /t a of the portion 41b is smaller than that of the portion 41a.
  • the first layer 41 of the conductive member 18 has the portions 41a and 41b with different values of t h /t a , so that the increase in internal resistance can be reduced.
  • t h /t a is small, i.e., the thickness variation is large, and the surface roughness of the interface with the base material 40 and/or the second layer 42 is likely to increase. Therefore, in the portion 41b, the first layer 41 is less likely to peel off from the base material 40 and/or the second layer 42.
  • current can be preferentially passed through the portion with a thin thickness, i.e., the portion with a low electrical resistance, so that the increase in internal resistance can be reduced.
  • the portion 41a may have t h /t a of, for example, 0.90 or more and 1.00 or less.
  • the portion 41b may have t h /t a of, for example, 0.95 or less, or even 0.70 or more and 0.95 or less.
  • t h /t a is 0.95 or less, a current can be preferentially passed through the thinner portions of the first layer 41, i.e., the portions with low electrical resistance, and an increase in internal resistance can be reduced.
  • the portion with the larger t h /t a may be the portion 41a
  • the portion with the smaller t h /t a may be the portion 41b.
  • the portion 41a may correspond to the central portion 401a in the length direction L of the substrate 40
  • the portion 41b may correspond to the peripheral portion 401b in the length direction L of the substrate 40.
  • the portion 41a may correspond to the central portion 401a in the width direction W of the substrate 40
  • the portion 41b may correspond to the peripheral portion 401b in the width direction W of the substrate 40.
  • the conductive member 18 may have a portion 41a located between the surface 411 of the first layer 41 and the center of the substrate 40, and a portion 41b located closer to the periphery of the substrate 40 than the portion 41a.
  • the performance of the conductive member 18 is improved by the first layer 41 of the conductive member 18 having the portions 41a and 41b. This improves the performance of the cell 1 and the cell stack device 10.
  • the arithmetic mean thickness t a and the harmonic mean thickness t h of the first layer 41 can be measured based on the results of observing the cross section of the conductive member 18 with a SEM (Scanning Electron Microscope). Specifically, the arithmetic mean thickness t a and the harmonic mean thickness t h of the first layer 41 are calculated from an SEM image of a cross section perpendicular to the surface 411 of the first layer 41. For example, an SEM image is taken so that the length in the surface direction of the first layer 41 is 10 ⁇ m to 20 ⁇ m. In the obtained SEM image, the thickness t of the first layer 41 is measured at any n points.
  • the SEM image may be divided into 10 equal parts in a direction perpendicular to the thickness direction of the first layer 41, and the thickness of the first layer 41 at the center of each region may be measured.
  • the arithmetic mean thickness t a and the harmonic mean thickness t h may be calculated using the measured t 1 to t n using the following formulas 1 and 2.
  • an SEM photograph of a cross section including the first layer 41 is taken at a magnification of 10,000 times.
  • Fig. 5 is an external perspective view showing the module according to the first embodiment.
  • Fig. 5 shows a state in which the front and rear surfaces, which are part of the storage container 101, have been removed and the cell stack device 10 of the fuel cell stored inside has been removed to the rear.
  • the module 100 includes a storage container 101 and a cell stack device 10 stored in the storage container 101.
  • a reformer 102 is disposed above the cell stack device 10.
  • the reformer 102 reforms raw fuel such as natural gas or kerosene to generate fuel gas, which is then supplied to the cell 1.
  • the raw fuel is supplied to the reformer 102 through a raw fuel supply pipe 103.
  • the reformer 102 may also include a vaporizer 102a that vaporizes water, and a reformer 102b.
  • the reformer 102b includes a reforming catalyst (not shown) and reforms 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 then supplied to the gas flow path 2a (see Figure 1A) of the cell 1 through the gas flow 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 the combustion of gas and power generation by the cell 1.
  • the cell stack device 10 that can improve performance is housed and configured to provide a module 100 with improved performance.
  • Fig. 6 is an exploded perspective view showing an example of a module housing device according to the first embodiment.
  • the module housing device 110 according to this embodiment includes an outer case 111, the module 100 shown in Fig. 5, and auxiliary equipment (not shown).
  • the auxiliary equipment operates the module 100.
  • the module 100 and the auxiliary equipment are housed in the outer case 111. Note that some components are omitted in Fig. 6.
  • the exterior case 111 of the module accommodating device 110 shown in Figure 6 has support posts 112 and an exterior plate 113.
  • a 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 accommodating chamber 115 that accommodates the module 100, and the space below the partition plate 114 in the exterior case 111 is an auxiliary equipment accommodating chamber 116 that accommodates the auxiliary equipment that operates the module 100.
  • the auxiliary equipment accommodated in the auxiliary equipment accommodating chamber 116 is omitted in Figure 6.
  • the partition plate 114 also has an air flow port 117 for allowing air from the auxiliary equipment housing chamber 116 to flow toward the module housing chamber 115.
  • the exterior plate 113 that constitutes the module housing chamber 115 has an exhaust port 118 for exhausting air from within the module housing chamber 115.
  • module housing device 110 As described above, by providing the module 100 capable of improving performance in the module housing chamber 115, it is possible to make the module housing device 110 capable of improving performance.
  • a hollow flat support substrate is used, but the present invention can also be applied to an electrochemical cell device that uses a cylindrical support substrate.
  • Second Embodiment 7A and 7B are cross-sectional views showing an example of an electrochemical cell according to the second embodiment and another example of an electrochemical cell according to the second embodiment.
  • FIGS. 8A and 8B are enlarged views of a cross section taken along line D-D in FIG. 7A. Note that FIGS. 8A and 8B can also be applied to the example in FIG. 7B.
  • the connection portion 18a of the conductive member 18 includes a metal substrate 40 containing chromium, and a first layer 41 which is a coating containing chromium oxide and located on the surface of the substrate 40.
  • the conductive member 18 may include a second layer 42 located on the first layer 41.
  • the first layer 41 has a portion 41a and a portion 41b where t h /t a is smaller than that of the portion 41a. This improves the performance of the conductive member 18, and therefore the performance of the cell 1A and the cell stack device 10A.
  • connection portion 18a of the conductive member 18 may be joined to the element portion 3A of the cell 1a via a bonding material 43.
  • connection portion 18b of the conductive member 18 may be joined to the member 120 of the support substrate 2 via a bonding material 43a.
  • the material of the bonding material 43a may be the same as the material of the bonding material 43, or may be different.
  • the side of the fuel electrode 5 is covered with a solid electrolyte layer 6, which airtightly seals the gas flow path 2a through which the fuel gas flows.
  • the side of the fuel electrode 5 may be covered and sealed with a dense sealing material 9.
  • the sealing material 9 that covers the side of the fuel electrode 5 may have electrical insulating properties.
  • the material of the sealing material 9 may be, for example, glass or ceramics.
  • the member 120 of the support substrate 2 may include a metal base material 50 containing chromium and a first layer 51 which is a coating containing chromium oxide and located on the surface of the base material 50.
  • the member 120 may include a second layer 52 located on the first layer 51.
  • the first layer 51 may have a first portion 51a and a second portion 51b in which t h /t a is smaller than that of the first portion 51a. This improves the performance of the member 120, thereby improving the performance of the cell 1A and the cell stack device 10A.
  • Fig. 9 is a cross-sectional view showing an example of an electrochemical cell device according to the third embodiment.
  • the gas flow path 2a of the support substrate 2 may be formed of a member 120 having projections and recesses instead of the conductive member 18 shown in Fig. 7A.
  • the member 120 is an example of the conductive member 18 that electrically connects adjacent cells 1B to each other.
  • Fig. 10 is an enlarged view of region E shown in Fig. 9.
  • a member 120 as the conductive member 18 includes a metal substrate 40 containing chromium, and a first layer 41 which is a coating containing chromium oxide and located on the surface of the substrate 40.
  • the conductive member 18 may include a second layer 42 located on the first layer 41.
  • the first layer 41 has a portion 41a and a portion 41b in which t h /t a is smaller than that of the portion 41a. This improves the performance of the conductive member 18, and therefore improves the performance of the cell 1B and the cell stack device 10B.
  • the first layer 41 may be located on the entire surface 121 facing the cell 1a, or it may be located only on the portion 121a joined to the air electrode 8, and not on the portion 121b separated from the air electrode 8.
  • cell 1C which is a flat-plate electrochemical cell, has an element section 3C in which a fuel electrode 5, a solid electrolyte layer 6, and an air electrode 8 are stacked.
  • Element section 3B may have an intermediate layer located between the solid electrolyte layer 6 and the air electrode 8. If element section 3B has an intermediate layer, the material of this intermediate layer may be the same as the material of intermediate layer 7 of element section 3 shown in FIG. 1A.
  • multiple cells 1C are electrically connected by conductive members 91, 92, which are adjacent metal layers. The conductive members 91, 92 electrically connect adjacent cells 1C to each other and have a gas flow path that supplies gas to the fuel electrode 5 or the air electrode 8.
  • the conductive member 92 as the conductive member 18 has a gas flow path 93 that supplies gas to the air electrode 8.
  • the conductive member 92 includes a metal substrate 40 containing chromium, and a first layer 41 that contains chromium oxide and is a coating located on the surface of the substrate 40.
  • the conductive member 18 may include a second layer 42 located on the first layer 41.
  • the first layer 41 has a portion 41a and a portion 41b in which t h /t a is smaller than that of the portion 41a. This improves the performance of the conductive member 92, and therefore the performance of the cell 1C and the cell stack device.
  • the conductive member 92 may be in contact with the element portion 3C via the bonding material 43.
  • the conductive member 92 may also be in contact with the element portion 3C without the bonding material 43.
  • the second layer 42 or the first layer 41 may be directly connected to the element portion 3C without using the bonding material 43.
  • 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,” “electrochemical cell device,” “module,” and “module housing device,” but other examples may be an electrolysis cell, an electrolysis cell stack device, an electrolysis module, and an electrolysis device, respectively.
  • An electrolysis cell has an anode (oxygen electrode) which is a first electrode, and a cathode which is a second electrode, and decomposes water vapor into hydrogen and oxygen, or carbon dioxide into carbon monoxide and oxygen, when supplied with electric power.
  • the electrochemical cell according to this embodiment improves electrolysis performance.
  • the conductive member (2) includes a metal substrate containing chromium, a coating containing chromium oxide and located on a surface of the substrate;
  • arithmetic mean thickness of the coating is t a and the harmonic mean thickness of the coating is t h .
  • the coating has a portion where t h /t a is 0.95 or less.
  • the t h /t a ratio of the second portion may be smaller than that of the first portion by 0.05 or more.
  • the base material has a surface including a central portion and a peripheral portion
  • the coating may have a first portion and a second portion located closer to the periphery than the first portion.
  • the electrochemical cell device (5) includes an element portion, and a conductive member according to any one of (1) to (4) above, which is electrically connected to the element portion; the conductive member has a first surface facing the element portion and having a flat portion and a corner portion; The coating has a first portion located opposite the flat portion and a second portion located closer to the corner portion than the first portion.
  • the module (6) comprises the electrochemical cell device (5) described above, and a container for housing the electrochemical cell device.
  • the module housing device (7) includes the module (6) and Auxiliary equipment for operating the module; and an exterior case that houses the module and the auxiliary equipment.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Inorganic Chemistry (AREA)
  • Battery Mounting, Suspending (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)

Abstract

Cet élément électroconducteur comprend : un matériau de base métallique contenant du chrome ; et un revêtement qui contient de l'oxyde de chrome et qui est positionné sur la surface du matériau de base. Lorsque l'épaisseur moyenne arithmétique du revêtement est désignée par ta, et lorsque l'épaisseur moyenne harmonique du revêtement est désignée par th, le revêtement comporte une première partie et une seconde partie dans laquelle th/ta est inférieur à celui de la première partie.
PCT/JP2023/046792 2022-12-26 2023-12-26 Élément électroconducteur, dispositif à cellule électrochimique, module et dispositif de réception de module WO2024143416A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022209057 2022-12-26
JP2022-209057 2022-12-26

Publications (1)

Publication Number Publication Date
WO2024143416A1 true WO2024143416A1 (fr) 2024-07-04

Family

ID=91717697

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/046792 WO2024143416A1 (fr) 2022-12-26 2023-12-26 Élément électroconducteur, dispositif à cellule électrochimique, module et dispositif de réception de module

Country Status (1)

Country Link
WO (1) WO2024143416A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015183252A (ja) * 2014-03-25 2015-10-22 京セラ株式会社 セルスタックおよび電解モジュールならびに電解装置
JP2018113249A (ja) * 2017-01-12 2018-07-19 日本碍子株式会社 端部集電部材、及びセルスタック装置
JP2021136224A (ja) * 2020-02-28 2021-09-13 京セラ株式会社 セルスタック装置、モジュールおよびモジュール収容装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015183252A (ja) * 2014-03-25 2015-10-22 京セラ株式会社 セルスタックおよび電解モジュールならびに電解装置
JP2018113249A (ja) * 2017-01-12 2018-07-19 日本碍子株式会社 端部集電部材、及びセルスタック装置
JP2021136224A (ja) * 2020-02-28 2021-09-13 京セラ株式会社 セルスタック装置、モジュールおよびモジュール収容装置

Similar Documents

Publication Publication Date Title
JP2024038153A (ja) セルスタック装置、モジュール、モジュール収容装置および導電部材
WO2023200016A1 (fr) Élément électroconducteur, dispositif de cellule électrochimique, module et dispositif de réception de module
JP7050214B1 (ja) 導電部材、セル、セルスタック装置、モジュールおよびモジュール収容装置
JP6960556B1 (ja) セルスタック装置、モジュール、モジュール収容装置および金属部材
JP2024013791A (ja) 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
WO2021221052A1 (fr) Cellule, dispositif d'empilement de cellules, module et dispositif de boîtier de module
WO2024143416A1 (fr) Élément électroconducteur, dispositif à cellule électrochimique, module et dispositif de réception de module
EP4145574A1 (fr) Cellule, dispositif d'empilement de cellules et dispositif de réception de module
JP7543601B1 (ja) 導電部材、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
WO2024143355A1 (fr) Cellule électrochimique, dispositif de cellule électrochimique, module et dispositif de réception de module
WO2024071416A1 (fr) Cellule électrochimique, dispositif de cellule électrochimique, module et dispositif de réception de module
WO2024095998A1 (fr) Cellule électrochimique, dispositif de cellule électrochimique, module et dispositif de réception de module
WO2024117052A1 (fr) Élément composite, cellule électrochimique, dispositif à cellule électrochimique, module et dispositif de stockage de module
WO2023145903A1 (fr) Élément électroconducteur, cellule électrochimique, dispositif à cellule électrochimique, module et dispositif de réception de module
JP7453485B1 (ja) 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
WO2024150829A1 (fr) Cellule électrochimique, dispositif de cellule électrochimique, module et dispositif de stockage de module
WO2022113411A1 (fr) Élément conducteur, cellule, dispositif à empilement de cellules, module et dispositif de réception de module
WO2023286749A1 (fr) Cellule électrochimique, dispositif de cellule électrochimique, module et dispositif de stockage de module
WO2023195520A1 (fr) Cellule électrochimique, dispositif de cellule électrochimique, module et dispositif de réception de module
WO2024004361A1 (fr) Élément électroconducteur, cellule électrochimique, dispositif à cellule électrochimique, module et dispositif d'enregistrement de module
WO2023190754A1 (fr) Cellule électrochimique, dispositif de cellule électrochimique, module et dispositif de réception de module
JP7525759B1 (ja) 固体電解質層、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
JP7284355B1 (ja) 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
WO2024143512A1 (fr) Cellule électrochimique, dispositif de cellule électrochimique, module et dispositif de réception de module
WO2023074807A1 (fr) Élément électroconducteur, cellule électrochimique, dispositif à cellule électrochimique, module et dispositif de stockage de module

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23912194

Country of ref document: EP

Kind code of ref document: A1