WO2023195245A1 - 電気化学セル - Google Patents

電気化学セル Download PDF

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Publication number
WO2023195245A1
WO2023195245A1 PCT/JP2023/005684 JP2023005684W WO2023195245A1 WO 2023195245 A1 WO2023195245 A1 WO 2023195245A1 JP 2023005684 W JP2023005684 W JP 2023005684W WO 2023195245 A1 WO2023195245 A1 WO 2023195245A1
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hydrogen electrode
intermediate layer
layer
support layer
electrode
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English (en)
French (fr)
Japanese (ja)
Inventor
隆平 小原
陽平 岡田
真司 藤崎
誠 大森
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NGK Insulators Ltd
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NGK Insulators Ltd
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    • 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
    • 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
    • C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
    • C25B11/042—Electrodes formed of a single material
    • C25B11/046—Alloys
    • 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
    • C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
    • C25B11/042—Electrodes formed of a single material
    • C25B11/047—Ceramics
    • 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
    • C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
    • C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
    • C25B9/23—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms comprising ion-exchange membranes in or on which electrode material is embedded
    • 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
    • C25B9/63—Holders for electrodes; Positioning of the electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
    • H01M8/1213—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the electrode/electrolyte combination or the supporting material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
    • H01M8/1213—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the electrode/electrolyte combination or the supporting material
    • H01M8/1226—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the electrode/electrolyte combination or the supporting material characterised by the supporting layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Definitions

  • the present invention relates to an electrochemical cell.
  • An anode-supported fuel cell is known as an example of an electrochemical cell (see, for example, Patent Document 1).
  • An anode-supported fuel cell includes a support layer, a hydrogen electrode disposed on the support layer, an oxygen electrode, and an electrolyte disposed between the hydrogen electrode and the oxygen electrode.
  • the support layer can be composed of YSZ (yttria stabilized zirconia) and Ni (nickel), and the hydrogen electrode can be composed of ceria-based oxide added with a rare earth element and Ni. Ni contained in each of the hydrogen electrode and the support layer exists in the form of NiO in the oxidizing atmosphere.
  • NiO contained in the support layer and the hydrogen electrode is reduced to Ni, so that a volume change occurs in each of the support layer and the hydrogen electrode.
  • ceria (CeO 2 ) in the hydrogen electrode has a large expansion amount in a reducing atmosphere
  • zirconia (ZrO 2 ) in the support layer has a relatively small expansion amount in a reducing atmosphere.
  • a difference in the amount of expansion occurs between the hydrogen electrode and the support layer. If startup and shutdown are repeated under this condition, cracks will occur due to stress accumulated within the hydrogen electrode.
  • An object of the present invention is to provide an electrochemical cell that can suppress cracks in the hydrogen electrode.
  • the electrochemical cell according to the present invention includes a support layer, an intermediate layer disposed on the support layer, a hydrogen electrode disposed on the intermediate layer, an oxygen electrode, and an intermediate layer disposed between the hydrogen electrode and the oxygen electrode. and an electrolyte.
  • the support layer is composed of yttria-stabilized zirconia and nickel.
  • the hydrogen electrode is composed of ceria-based oxide to which rare earth elements are added and nickel.
  • the intermediate layer is composed of yttria-stabilized zirconia, a solid solution of ceria-based oxide added with a rare earth element, and nickel.
  • FIG. 1 is a cross-sectional view of a fuel cell.
  • the fuel cell 10 is a so-called anode-supported fuel cell.
  • the fuel cell 10 includes a support layer 11 , an intermediate layer 12 , a hydrogen electrode 13 , an electrolyte 14 , a reaction prevention layer 15 , and an oxygen electrode 16 .
  • Support layer 11 supports intermediate layer 12 .
  • the shape of the support layer 11 is not particularly limited, it can be formed into, for example, a plate shape, a hollow plate shape, a cylindrical shape, or the like.
  • the support layer 11 is made of a porous material that has electronic conductivity. Specifically, the support layer 11 contains YSZ (yttria stabilized zirconia) and Ni (nickel). As YSZ, ZrO 2 (zirconia) stabilized with Y 2 O 3 (yttria) of 3 mol % or more and 10 mol % or less can be used. Ni becomes metallic Ni in a reducing atmosphere where fuel gas is supplied, and becomes NiO in an oxidizing atmosphere where fuel gas is not supplied.
  • the content of YSZ in the support layer 11 can be 25 mol% or more and 55 mol% or less.
  • the Ni content in the support layer 11 can be 45 mol% or more and 75 mol% or less in terms of NiO.
  • the respective contents of YSZ and Ni in the support layer 11 are obtained by line analysis using an atomic concentration profile, that is, elemental mapping using an EPMA (Electron Probe Micro Analyzer). Specifically, in a cross section along the thickness direction, line analysis is performed in the thickness direction using EPMA, thereby obtaining concentration distribution data of each element.
  • EPMA is a concept that includes EDS (Energy Dispersive x-ray Spectroscopy).
  • the porosity of the support layer 11 can be, for example, 10% or more and 50% or less. In this specification, porosity is the ratio of the area of the gas phase to the total area of the solid phase and gas phase in cross-sectional observation using a SEM (scanning electron microscope).
  • the thickness of the support layer 11 can be, for example, 50 ⁇ m or more and 1 mm or less.
  • Intermediate layer 12 is arranged on support layer 11 .
  • Intermediate layer 12 is arranged between support layer 11 and hydrogen electrode 13 .
  • the intermediate layer 12 is made of a porous material having electronic conductivity and ionic conductivity.
  • the intermediate layer 12 includes Ni and a solid solution of ceria-based oxide to which YSZ and a rare earth element are added.
  • a solid solution is one in which YSZ and a ceria-based oxide to which a rare earth element is added are dissolved together to form a uniform solid phase.
  • the NiO contained in the support layer 11 and the hydrogen electrode 13 is reduced to Ni, so the volume changes in the support layer 11 and the hydrogen electrode 13, respectively. occurs.
  • CeO 2 in the hydrogen electrode 13 has a large expansion amount in a reducing atmosphere
  • ZrO 2 in the support layer 11 has a relatively small expansion amount in a reducing atmosphere. A difference in the amount of expansion occurs between the support layers 11. If the fuel cell 10 is repeatedly started and stopped under this condition, cracks are likely to occur due to stress accumulated within the hydrogen electrode 13.
  • the intermediate layer 12 contains both YSZ, which is a constituent material of the support layer 11, and a ceria-based oxide added with a rare earth element, which is a constituent material of the hydrogen electrode 13, which will be described later. There is.
  • This intermediate layer 12 functions as a buffer layer that buffers the difference in the amount of expansion between the hydrogen electrode 13 and the support layer 11, so that the inside of the hydrogen electrode 13 is smaller than when the support layer 11 and the hydrogen electrode 13 are directly connected. Accumulation of stress can be suppressed. Therefore, generation of cracks in the hydrogen electrode 13 can be suppressed.
  • the intermediate layer 12 is a region between the support layer 11 and the hydrogen electrode 13 in which a solid solution of ceria-based oxide to which YSZ and a rare earth element are added exists.
  • ceria-based oxides doped with rare earth elements include, but are not limited to, gadolinium-doped ceria (GDC), samarium-doped ceria (SDC), and yttrium-doped ceria (YDC).
  • GDC gadolinium-doped ceria
  • SDC samarium-doped ceria
  • YDC yttrium-doped ceria
  • CeO 2 (ceria) doped with an oxide of Gd (gadolinium) of 5 mol % or more and 20 mol % or less can be used.
  • Ni becomes metallic Ni in a reducing atmosphere where fuel gas is supplied, and becomes NiO in an oxidizing atmosphere where fuel gas is not supplied.
  • the content of YSZ in the intermediate layer 12 can be 15 mol% or more and 35 mol% or less.
  • the content of the ceria-based oxide to which a rare earth element is added in the intermediate layer 12 can be 15 mol% or more and 35 mol% or less.
  • the content of Ni in the intermediate layer 12 can be 35 mol% or more and 65 mol% or less in terms of NiO.
  • the respective contents of YSZ, rare earth element-added ceria-based oxide, and Ni in the support layer 11 are obtained by line analysis using the atomic concentration profile described above.
  • the thickness of the intermediate layer 12 can be, for example, 1 ⁇ m or more and 50 ⁇ m or less.
  • the thickness of the intermediate layer 12 is preferably 20 ⁇ m or less.
  • the thickness of the intermediate layer 12 is preferably 3 ⁇ m or more. Thereby, it is possible to further suppress the occurrence of cracks in the hydrogen electrode 13. Therefore, by setting the thickness of the intermediate layer 12 to 3 ⁇ m or more and 20 ⁇ m or less, it is possible to both ensure the initial performance of the fuel cell 10 and further suppress cracks.
  • the thickness of the intermediate layer 12 is determined by observing a cross section of the intermediate layer 12 along the thickness direction at 1000 times magnification using FE-SEM, and determining the thickness of the intermediate layer 12 at five points randomly selected from the observed image. is obtained by taking the arithmetic mean of The thickness direction is a direction perpendicular to the surface of the electrolyte 14 on the hydrogen electrode side.
  • the porosity of the intermediate layer 12 can be, for example, 10% or more and 50% or less.
  • Hydrogen electrode 13 is placed on intermediate layer 12 . Hydrogen electrode 13 is placed between intermediate layer 12 and electrolyte 14 . Fuel gas is supplied to the hydrogen electrode 13 via the support layer 11 and the intermediate layer 12 . At the hydrogen electrode 13, an electrode reaction expressed by the following formula (1) occurs.
  • the hydrogen electrode 13 is made of a porous material having electronic conductivity and ionic conductivity.
  • the hydrogen electrode 13 includes a ceria-based oxide to which a rare earth element is added and Ni.
  • ceria-based oxides doped with rare earth elements include, but are not limited to, GDC, SDC, and YDC.
  • GDC CeO 2 (ceria) doped with an oxide of Gd (gadolinium) of 5 mol % or more and 20 mol % or less can be used.
  • Gd gadolinium
  • the rare earth element-doped ceria-based oxide contained in the hydrogen electrode 13 may be the same or different from the rare-earth element-added ceria-based oxide contained in the intermediate layer 12 .
  • Ni becomes metallic Ni in a reducing atmosphere where fuel gas is supplied, and becomes NiO in an oxidizing atmosphere where fuel gas is not supplied.
  • the hydrogen electrode 13 contracts and expands in response to the reduction and oxidation of Ni, but as described above, the change in volume of the hydrogen electrode 13 is absorbed by the intermediate layer 12, which causes cracks to occur in the hydrogen electrode 13. is suppressed.
  • the content of the ceria-based oxide to which rare earth elements are added in the hydrogen electrode 13 can be set to 35 mol% or more and 65 mol% or less.
  • the Ni content in the hydrogen electrode 13 can be 35 mol% or more and 65 mol% or less in terms of NiO.
  • the respective contents of ceria-based oxide to which a rare earth element is added and Ni in the hydrogen electrode 13 are obtained by line analysis using the atomic concentration profile described above.
  • the porosity of the hydrogen electrode 13 can be, for example, 10% or more and 50% or less.
  • the thickness of the hydrogen electrode 13 can be, for example, 5 ⁇ m or more and 0.1 mm or less.
  • Electrolyte 14 is placed on hydrogen electrode 13 . Electrolyte 14 is placed between hydrogen electrode 13 and oxygen electrode 16. In this embodiment, since the fuel cell 10 includes the reaction prevention layer 15, the electrolyte 14 is sandwiched between the hydrogen electrode 13 and the reaction prevention layer 15.
  • the electrolyte 14 is made of a dense material that has ionic conductivity and no electronic conductivity.
  • the electrolyte 14 is, for example, ZrO 2 stabilized with Y 2 O 3 , CeO 2 , Sc 2 O 3 , Yb 2 O 3 or the like, or doped with Y 2 O 3 , Sm 2 O 3 , Gd 2 O 3 or the like. It can be composed of CeO 2 .
  • the electrolyte 14 is lanthanum gallate, or a lanthanum gallate type perovskite structure in which part of the lanthanum or gallium of the lanthanum gallate is replaced with strontium, calcium, barium, magnesium, aluminum, indium, cobalt, iron, nickel, copper, etc. It can be composed of an oxide.
  • the electrolyte 14 may be composed of one type of electrolyte material, or may be composed of two or more types of electrolyte materials.
  • the porosity of the electrolyte 14 can be, for example, 0% or more and 7% or less.
  • the thickness of the electrolyte 14 can be, for example, 3 ⁇ m or more and 50 ⁇ m or less. Note that the electrolyte 14 may have a single layer structure or a multilayer structure.
  • Reaction prevention layer 15 is placed on electrolyte 14 . Reaction prevention layer 15 is arranged between electrolyte 14 and oxygen electrode 16. The reaction prevention layer 15 is provided to prevent the constituent materials of the electrolyte 14 and the constituent materials of the oxygen electrode 16 from reacting to form a reaction layer with high electrical resistance.
  • the reaction prevention layer 15 is made of an ion conductive material.
  • the reaction prevention layer 15 can be made of ceria doped with oxides of rare earth elements such as Gd, Sm, and Y, for example.
  • the porosity of the reaction prevention layer 15 can be, for example, 0.1% or more and 50% or less.
  • the thickness of the reaction prevention layer 15 can be, for example, 1 ⁇ m or more and 50 ⁇ m or less.
  • Oxygen electrode 16 is placed on reaction prevention layer 15 .
  • the oxygen electrode 16 is supplied with a gas containing oxygen (for example, air).
  • a gas containing oxygen for example, air
  • the oxygen electrode 16 is made of a porous material that has electronic conductivity.
  • the porosity of the oxygen electrode 16 can be, for example, 10% or more and 50% or less.
  • the thickness of the oxygen electrode 16 can be, for example, 10 ⁇ m or more and 100 ⁇ m or less.
  • An electrochemical cell consists of an element with a pair of electrodes arranged so that an electromotive force is generated from the overall redox reaction, and an element that converts chemical energy into electrical energy. It is a generic term.
  • Electrochemical cells include anode-supported fuel cells, horizontal striped fuel cells, vertical striped fuel cells, flat plate fuel cells, cylindrical fuel cells, and water electrolysis cells. Examples include electrolytic cells that generate hydrogen using reactions. Furthermore, in the above embodiments, O 2 - (oxygen ions) are used as carriers, but OH - (hydroxide ions) or protons may be used as carriers.
  • the fuel cell 10 is provided with the reaction prevention layer 15, but the reaction prevention layer 15 may not be provided.
  • Electrolytic cells according to Examples 1 to 7 were produced as follows.
  • a support layer molded body was produced by sheet-molding a support layer slurry containing a mixture of YSZ powder, NiO powder, binder, pore-forming agent, plasticizer, dispersion medium, and solvent.
  • an intermediate layer paste prepared by mixing YSZ powder, GDC powder, NiO powder, binder, pore-forming agent, plasticizer, dispersion medium, and solvent is printed on the support layer molded body.
  • a molded body was formed.
  • the thickness of each intermediate layer of Examples 1 to 7 was adjusted as shown in Table 1 by changing the printing thickness of the intermediate layer paste.
  • a hydrogen electrode paste prepared by mixing GDC powder, NiO powder, binder, pore-forming agent, plasticizer, dispersion medium, and solvent is printed on the intermediate layer molded body to form a hydrogen electrode molded body. Formed.
  • an electrolyte molded body was formed by printing an electrolyte paste prepared by mixing YSZ powder, a binder, a plasticizer, a dispersion medium, and a solvent onto the hydrogen electrode molded body.
  • reaction prevention layer molded body was formed by printing a reaction prevention layer paste prepared by mixing GDC powder, a binder, and a solvent onto the electrolyte molded body.
  • the support layer, the intermediate layer, the hydrogen electrode, and the electrolyte are formed by firing (1300°C, 5 hours) the laminate of the support layer molded body, the intermediate layer molded body, the hydrogen electrode molded body, the electrolyte molded body, and the reaction prevention layer molded body.
  • a fired body consisting of a reaction prevention layer and a reaction prevention layer was produced.
  • An oxygen electrode molded body was formed by printing an oxygen electrode paste prepared by mixing LSCF powder, a binder, and a solvent onto the reaction prevention layer.
  • the oxygen electrode molded body was fired (1050°C, 2 hours) to obtain electrolytic cells according to Examples 1 to 7.
  • Heat cycle test A first thermal cycle test was conducted on the electrolytic cells according to Examples 1 to 7 and Comparative Example 1. Specifically, while supplying Ar gas and hydrogen gas (4% relative to Ar gas) to the hydrogen electrode, the temperature is raised from room temperature to 750°C in 2 hours, and then the temperature is lowered from 750°C to room temperature in 4 hours. The process was repeated 10 times as one cycle.
  • Example 7 in which the thickness of the intermediate layer was 20 ⁇ m or less, it was possible to suppress the initial performance from becoming lower than in Example 7. This result was obtained because the ion conduction path within the intermediate layer was prevented from being cut.
  • Example 2 in which the thickness of the intermediate layer was 3 ⁇ m or more, the generation of cracks in the hydrogen electrode was further suppressed compared to Example 1.
  • Fuel cell 11 Support layer 12 Intermediate layer 13 Hydrogen electrode 14 Electrolyte 15 Reaction prevention layer 16 Oxygen electrode

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  • Engineering & Computer Science (AREA)
  • Electrochemistry (AREA)
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PCT/JP2023/005684 2022-04-05 2023-02-17 電気化学セル Ceased WO2023195245A1 (ja)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012520553A (ja) * 2009-03-16 2012-09-06 コリア・インスティテュート・オブ・サイエンス・アンド・テクノロジー 気孔傾斜構造のナノ気孔性層を含む燃料極支持型固体酸化物燃料電池及びその製造方法
JP2017139078A (ja) * 2016-02-02 2017-08-10 株式会社Ｓｏｋｅｎ 固体酸化物形燃料電池セル
JP2021034374A (ja) * 2019-08-19 2021-03-01 日本碍子株式会社 燃料電池セル、及びセルスタック装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012520553A (ja) * 2009-03-16 2012-09-06 コリア・インスティテュート・オブ・サイエンス・アンド・テクノロジー 気孔傾斜構造のナノ気孔性層を含む燃料極支持型固体酸化物燃料電池及びその製造方法
JP2017139078A (ja) * 2016-02-02 2017-08-10 株式会社Ｓｏｋｅｎ 固体酸化物形燃料電池セル
JP2021034374A (ja) * 2019-08-19 2021-03-01 日本碍子株式会社 燃料電池セル、及びセルスタック装置

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