WO2017154258A1 - 燃料電池スタックの製造方法 - Google Patents
燃料電池スタックの製造方法 Download PDFInfo
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- WO2017154258A1 WO2017154258A1 PCT/JP2016/080775 JP2016080775W WO2017154258A1 WO 2017154258 A1 WO2017154258 A1 WO 2017154258A1 JP 2016080775 W JP2016080775 W JP 2016080775W WO 2017154258 A1 WO2017154258 A1 WO 2017154258A1
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- fuel cell
- anode electrode
- cell stack
- temperature
- organic substance
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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
- H01M8/0286—Processes for forming seals
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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
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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
- H01M8/0284—Organic resins; Organic polymers
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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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/241—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes
- H01M8/2425—High-temperature cells with solid electrolytes
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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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
- H01M8/2484—Details of groupings of fuel cells characterised by external manifolds
- H01M8/2485—Arrangements for sealing external manifolds; Arrangements for mounting external manifolds around a stack
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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
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
- H01M2008/1293—Fuel cells with solid oxide electrolytes
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a method for manufacturing a fuel cell stack, and more particularly to a method for manufacturing a solid oxide fuel cell stack.
- a solid oxide fuel cell (hereinafter sometimes simply referred to as SOFC) includes a cathode electrode on one side of a solid oxide electrolyte and an anode electrode on the other side.
- an oxygen-containing gas such as air is supplied to the cathode electrode, and a fuel such as hydrogen is supplied to the anode electrode, whereby oxygen ions react with the fuel to generate electricity.
- a metal catalyst is used for the anode electrode.
- the metal catalyst is oxidized, the catalytic activity may be reduced, or a volume change may occur and stress may be applied, resulting in damage to the fuel cell stack.
- the oxygen flow path for supplying oxygen-containing gas such as air to the cathode electrode and the fuel flow path for supplying fuel such as hydrogen to the anode electrode are sealed with a sealing material to prevent gas leakage.
- the sealing material an inorganic sealing material that can withstand the operating temperature of SOFC is used.
- the inorganic sealing material contains an organic binder, an organic solvent, and the like, so that handling properties are improved and the fuel cell stack can be assembled precisely and easily.
- the organic-containing inorganic sealing material containing the organic binder, the organic solvent, or the like in the inorganic sealing material may deteriorate the sealing performance when the organic matter remains and may cause gas leakage. Organic substances in the sealing material must be removed and densified.
- the present invention has been made in view of such problems of the prior art, and an object of the present invention is to achieve both the prevention of oxidation of the anode electrode and the removal of organic substances in the organic substance-containing inorganic sealing material. It is an object of the present invention to provide a method for manufacturing a fuel cell stack.
- the present inventor actively supplies an oxygen-containing gas to the fuel flow path on the anode side, and applies an electric current from the outside through the electrolyte from the anode electrode side.
- an oxygen-containing gas to the fuel flow path on the anode side, and applies an electric current from the outside through the electrolyte from the anode electrode side.
- the method for producing a fuel cell stack of the present invention is to produce a fuel cell stack by heating a laminate in which a plurality of fuel cell single cells are laminated, and the fuel cell single cell comprises an organic matter-containing inorganic sealing material, It consists of a separator, an anode electrode, an electrolyte, and a cathode electrode. And it has the organic substance removal process which removes the organic substance in the said organic substance containing inorganic sealing material, In the organic substance removing step, an oxygen-containing gas is supplied to the fuel flow path on the anode electrode side, and an electric current is applied to the laminated body from the outside to move the charge from the anode electrode side to the cathode electrode side through the electrolyte. It is what is heated.
- an oxygen-containing gas is supplied to the anode-side fuel flow path, and an electric current is applied from the outside to the laminated body in which a plurality of fuel cell single cells are laminated, and the cathode electrode is passed through the electrolyte from the anode electrode side.
- the organic substance in the organic material-containing inorganic sealing material is removed while moving the electric charge to the side, so that the production of the fuel cell stack manufacturing method can achieve both the oxidation prevention of the anode electrode and the sealing property of the organic material-containing inorganic sealing material A method can be provided.
- the manufacturing method of the fuel cell stack of the present invention is to manufacture a fuel cell stack by heating a laminated body in which a plurality of fuel cell single cells are stacked, the fuel cell single cell comprising an organic substance-containing inorganic sealing material, a separator, an anode electrode, And an electrolyte and a cathode electrode. Then, an oxygen-containing gas is supplied to the fuel flow path on the anode electrode side, and a current in the direction opposite to that during power generation (hereinafter sometimes referred to as reverse current) is applied to the fuel cell stack from the anode electrode side. Heating is performed while moving the electric charge to the cathode electrode side through the electrolyte, and the organic matter in the organic matter-containing inorganic sealing material is removed.
- a current in the direction opposite to that during power generation hereinafter sometimes referred to as reverse current
- Examples of the structure of the single fuel cell include a metal support cell (Metal-Supported Cell: MSC) that supports an electrode and an electrolyte with a porous metal sheet, and an electrolyte-supported cell (ESC) with a thick electrolyte. ), An anode supported type (Anode-Supported Cell: ASC) with a thicker anode, and a cathode supported type (Cathode-Supported Cell: CSC) with a thicker cathode.
- MSC Metal-Supported Cell
- ESC electrolyte-supported cell
- the method for producing a fuel cell stack of the present invention can be used for a stack of fuel cell single cells having any of the above structures.
- it demonstrates as a fuel cell of a metal support cell.
- the metal support cell is easily oxidized like the anode electrode. However, according to the manufacturing method of the fuel cell stack of the present invention, the oxidation of the metal support cell can be prevented.
- FIG. 1 is a diagram schematically showing a cross-sectional configuration of a metal support type fuel cell single cell.
- the metal support type fuel cell single cell used here has an anode electrode 3 (fuel electrode) on one surface of a metal support layer 2 which is a sheet-like porous metal support serving as a support (base material).
- the solid electrolyte 4 formed on the surface of the anode electrode 3 and the cathode electrode 5 (air electrode) formed on the surface of the solid electrolyte 4 are stacked.
- a separator 6 is provided between the metal support layer 2 and the cathode electrode 5 of adjacent fuel cell single cells, and the end of the separator is framed by the organic-containing inorganic sealing material 1, the insulator 10, and the like. Joined with.
- a fuel flow path 7 is formed between the separator 6 and the metal support layer 2, and an oxygen flow path 8 is formed between the separator 6 and the cathode electrode 5.
- the organic substance-containing inorganic sealing material contains an inorganic material and an organic substance such as an organic binder and an organic solvent, has flexibility and form stability, and is excellent in handling properties.
- the organic substance-containing inorganic sealing material By using the organic substance-containing inorganic sealing material, it is possible to print and mold as an ink-like / paste-like sealing material, or to form in a sheet shape or plate shape by punching into a complicated shape, Accurate assembly of the stack to be the fuel cell stack becomes possible.
- the organic material-containing inorganic sealing material is assembled with the laminate, and then heated to oxidize the organic material, remove it as carbon dioxide, densify, and sinter the fuel channel, oxygen channel, etc. Seal to prevent gas leakage.
- the inorganic material is not particularly limited as long as it can withstand the operating temperature of SOFC, and examples thereof include glass and ceramics.
- a metal catalyst made of a metal and / or alloy having hydrogen oxidation activity and stable in a reducing atmosphere can be used.
- nickel (Ni), palladium (Pd), platinum (Pt), ruthenium (Ru), Ni—Fe alloy, Ni—Co alloy, Fe—Co alloy, Ni—Cu alloy, Pd—Pt alloy, etc. Can do.
- a porous anode electrode is obtained by mixing graphite powder or the like into the constituent material of the anode electrode and heating and sintering.
- the production method of the present invention can be preferably used for a fuel cell stack using an anode electrode containing nickel (Ni).
- Nickel (Ni) has a particularly large volume change due to oxidation, and an anode electrode containing nickel (Ni) is easily damaged by oxidation.
- a fuel cell is used. Damage to the stack can be prevented.
- the constituent material of the cathode electrode is not particularly limited, and examples thereof include perovskite oxides. Specifically, lanthanum manganite series, lanthanum ferrite series, lanthanum cobaltite series, strontium cobaltite series, lanthanum nickel The oxide of a system can be mentioned.
- electrolyte material The oxide which has oxygen ion conductivity and functions as a solid electrolyte can be used.
- YSZ yttria stabilized zirconia: Zr 1-x Y x O 2
- SSZ scandium stabilized zirconia: Zr 1-x Sc x O 2
- SDC samarium doped ceria: Ce 1-x Sm x O 2
- GDC gadolinium doped ceria: Ce 1-x Gd x O 2
- LSGM lanthanum strontium magnesium gallate: La 1-x Sr x Ga 1-y Mg y O 3 ) and the like.
- the constituent materials of the anode electrode, the electrolyte, and the cathode electrode are mixed with an organic binder and an organic solvent to form ink, and are sequentially applied and dried by screen printing or the like to form an electrode-electrolyte assembly.
- the fuel cell stack manufacturing method of the present invention applies a current in the direction opposite to that during power generation to the stacked body FC in which a plurality of fuel cell single cells are stacked.
- An oxygen-containing gas is supplied to the fuel flow path 7 and heated by an electric furnace 20 or the like to have an organic substance removing step of removing organic substances in the organic substance-containing inorganic sealing material 1.
- an electrode forming step is performed prior to the organic matter removing step.
- the electrode forming step is a step of forming an electrode necessary for applying a current.
- the assembled electrode material may be in an unstable state containing an organic solvent or the like, and the electrode material is dried and stabilized in the electrode forming step. Specifically, the electrode material is dried by holding the fuel cell unit cell at a temperature T 0 lower than the organic oxidation start temperature T 2 for a certain period of time.
- the organic substance removing step was raised to organic oxidation onset temperature T 2 or more.
- the oxidation start temperature T 2 refers to the temperature at which the oxidation reaction proceeds in the organic substances in the organic substance-containing inorganic sealant.
- the organic substance removing step at a temperature of oxidation start temperature T 2 or more organic compound, removing organic matter of the organic substance-containing inorganic sealant in an oxygen-containing gas while supplying to the anode side fuel supply passage, by applying a reverse current It is a process to do.
- organic matter-containing inorganic sealing material By supplying actively heating an oxygen-containing gas to the fuel passage at a temperature of oxidation start temperature T 2 or more organic compound, becomes organic substance is oxidized dioxide of the organic substance-containing inorganic sealant in, an inorganic sealant The organic matter is removed.
- the organic matter-containing inorganic sealing material is densified by removing the organic matter and prevents gas leakage.
- reaction formula (1) When supplying the oxygen-containing gas, a current in the direction opposite to that during power generation is applied from the outside, so that an electrochemical oxidation reaction of the metal catalyst of the anode electrode, for example, a reaction represented by the following reaction formula (1) It is possible to forcibly move leftward and prevent the anode electrode from being oxidized.
- the reverse current is performed at oxidation initiation temperature above T 1 of the anode electrode, to initiate the application of the current in the oxidation starting temperature T 1 of the at least the anode electrode.
- the oxidation temperature T 1 refers to the temperature at which the oxidation reaction of the anode electrode starts.
- the amount of current applied is a sufficient amount of current to reduce the anode electrode. In the temperature of the oxidation reaction of the metal catalyst of the anode electrode does not proceed (T less than 1), it is possible to save energy by not applying the reverse current.
- Oxidation starting temperature T 1 of the anode electrode in advance, the oxidation start temperature of the anode electrode may be previously measured, but the presence of the oxidation reaction in the anode electrode in the heat measured sequentially, corrects the oxidation start temperature T 1 of By applying the reverse current, the anode electrode can be reliably prevented from being oxidized and energy can be saved.
- the amount of current applied is controlled based on the temperature of the anode electrode. Specifically, the amount of current is increased as the temperature of the anode electrode rises to prevent oxidation of the anode electrode.
- the oxidation of the anode electrode is also affected by factors other than temperature, such as the supply amount of the oxygen-containing gas, the presence or absence of an oxidation reaction of the anode electrode is sequentially measured, and the measurement result is fed back to the amount of current applied. It is preferable to control the amount of current.
- the measurement of the presence or absence of the oxidation reaction of the anode electrode is performed by electrochemical impedance (EIS: Electrochemical Impedance Spectroscopy) measurement. Specifically, a weak AC signal is applied to a heating fuel cell single cell, and the impedance of the cell is measured and analyzed from a voltage / current response signal. In addition, since the EIS leads to grasping the ohmic resistance at each temperature state, it is useful information for appropriately controlling the amount of current to be applied.
- EIS Electrochemical Impedance Spectroscopy
- Oxidation starting temperature T 2 of the organic material is the temperature at which oxidation of the organic material such as an organic binder and an organic solvent which contains the inorganic sealant is started.
- the starting temperature T 2 or more temperature oxidation of the organic material to maintain a predetermined time it is possible to reliably remove the organic matter.
- the upper limit of the temperature at which the organic substance is removed is a temperature that does not cause an unnecessary reaction other than the oxidation reaction of the organic substance, such as a shape change of the inorganic sealing material due to the rapid vaporization of the organic substance.
- the supply of oxygen-containing gas to the anode side by starting the oxidation initiation temperature T 2 above the organic matter, the oxidation of the anode electrode below the oxidation start temperature T 2 of the organic material can be suppressed.
- Oxidation starting temperature T 2 over time to maintain the temperature and amount of the organic substance which contains organic matter, may be set according to the ease of oxidation.
- an oxygen-containing gas is also supplied to the oxygen channel on the cathode electrode side to remove organic substances in the organic substance-containing inorganic sealing material in the oxygen channel.
- the sintering step stopping the supply of the oxygen-containing gas, is raised to a higher temperature T 3 than the oxidation start temperature T 2 of the organic material, inorganic organic matter is removed seal, an anode electrode, an electrolyte, a cathode electrode, etc. It is a process of sintering.
- the reverse current may be applied to prevent oxidation of the anode electrode, or the application of the reverse current may be stopped and the reducing gas may be supplied to the anode electrode side.
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Abstract
Description
そして、上記無機シール材は、有機バインダや有機溶剤等を含有させることで、ハンドリング性が向上し、燃料電池スタックの組み付けを精密かつ容易に行うことが可能になる。
しかし、燃料流路に高温環境下で酸素含有ガスを供給すると、アノード電極が酸化され、触媒活性の低下や、燃料電池スタックの損傷が生じる。
そして、上記有機物含有無機シール材中の有機物を除去する有機物除去工程を有し、
上記有機物除去工程が、アノード電極側の燃料流路に酸素含有ガスを供給し、かつ上記積層体に外部から電流を印加し、アノード電極側から電解質を介してカソード電極側に電荷を移動させながら加熱するものであることを特徴とする。
本発明の製造方法は、燃料電池単セルを複数積層した積層体を加熱し燃料電池スタックを製造するものであり、上記燃料電池単セルが、有機物含有無機シール材と、セパレータと、アノード電極と、電解質と、カソード電極とから成るものである。
そして、アノード電極側の燃料流路に酸素含有ガスを供給し、かつ上記燃料電池スタックに発電時とは逆方向の電流(以下、逆電流ということがある。)を印加し、アノード電極側から電解質を介してカソード電極側に電荷を移動させながら加熱し、上記有機物含有無機シール材中の有機物を除去するものである。
上記燃料電池単セルの構造としては、例えば、多孔質の金属シートで電極と電解質を支持するメタルサポートセル(Metal-Supported Cell:MSC)、電解質を厚くした電解質支持型(Electrolyte-Supported Cell:ESC)、アノードを厚くしたアノード支持型(Anode-Supported Cell:ASC)、カソードを厚くしたカソード支持型(Cathode-Supported Cell:CSC)等を挙げることができる。
しかし、本発明の燃料電池スタックの製造方法によれば、上記メタルサポートセルの酸化を防止できる。
(有機物含有無機シール材)
上記有機物含有無機シール材は、無機材料と有機バインダや有機機溶媒等の有機物を含み、柔軟性・形態安定性を有し、ハンドリング性に優れるものである。
上記アノード電極の構成材料としては、水素酸化活性を有し、還元性雰囲気中で安定な金属及び/又は合金から成る金属触媒を使用できる。
例えば、ニッケル(Ni)、パラジウム(Pd)、白金(Pt)、ルテニウム(Ru)、Ni-Fe合金、Ni-Co合金、Fe-Co合金、Ni-Cu合金、Pd-Pt合金等を挙げることができる。
ニッケル(Ni)は、酸化による体積変化が特に大きいものであり、ニッケル(Ni)を含有するアノード電極は、酸化による損傷が生じ易いものであるが、本発明の製造方法によれば、燃料電池スタックの損傷を防止することができる。
上記カソード電極の構成材料としては、特に制限はなく、例えば、ペロブスカイト型酸化物が挙げられ、具体的には、ランタンマンガナイト系、ランタンフェライト系、ランタンコバルタイト系、ストロンチウムコバルタイト系、ランタンニッケル系の酸化物を挙げることができる。
また、電解質材としては、特に制限はなく、酸素イオン伝導性を備え、固体電解質として機能する酸化物を使用できる。
例えば、YSZ(イットリア安定化ジルコニア:Zr1-xYxO2)、SSZ(スカンジウム安定化ジルコニア:Zr1-xScxO2)、SDC(サマリウムドープトセリア:Ce1-xSmxO2)、GDC(ガドリウムドープトセリア:Ce1-xGdxO2)、LSGM(ランタンストロンチウムマグネシウムガレート:La1-xSrxGa1-yMgyO3)等を挙げることができる。
本発明の燃料電池スタックの製造方法は、図2に示すように、上記燃料電池単セルを複数積層した積層体FCに、発電時とは逆方向の電流を印加しながら、アノード電極3側の燃料流路7に酸素含有ガスを供給して電気炉20等により加熱し、有機物含有無機シール材1中の有機物を除去する有機物除去工程を有するものである。
まず、上記有機物除去工程に先立って電極形成工程を行う。
上記電極形成工程は電流の印加に必要な電極を形成する工程である。
具体的には、燃料電池単セルを、有機物の酸化開始温度T2よりも低い温度T0で一定時間保持することで電極材を乾燥する。
上記電極形成工程により電極を形成した後、有機物の酸化開始温度T2以上に上昇させて有機物除去工程を行う。本発明において、酸化開始温度T2は有機物含有無機シール材中の有機物の酸化反応が進む温度をいう。
有機物含有無機シール材は、有機物が除去されることで緻密化しガス漏れを防止する。
また、印加する電流量は、アノード電極を還元するために十分な量の電流である。
アノード電極の金属触媒の酸化反応が進まない温度(T1未満)では、上記逆電流を印加しないことで省エネルギー化することができる。
具体的には、アノード電極の温度上昇と共に電流量を増加させてアノード電極の酸化を防止する。
具体的には、加熱中の燃料電池単セルに微弱な交流信号を印加して、電圧/電流の応答信号からセルのインピーダンスを測定し解析して行う。加えて、EISにより、各温度状態でのオーム抵抗分の把握にもつながるため、適切な印加する電流量の制御に有用な情報となる。
上記有機物の除去を行う温度の上限は、有機物が急激に気化することに等による無機シール材の形状変化等、有機物の酸化反応以外の不要な反応を起こさない温度である。
上記有機物除去工程により有機物含有無機シール材中の有機物を除去した後、焼結工程を行う。
2 金属支持層
3 アノード電極
4 電解質
5 カソード電極
6 セパレータ
7 燃料流路
8 酸素流路
9 フレーム
10 絶縁体
20 電気炉
30 空気
FC 積層体
Claims (10)
- 燃料電池単セルを複数積層した積層体を加熱し燃料電池スタックを製造する燃料電池スタックの製造方法であって、
上記燃料電池単セルが、有機物含有無機シール材と、セパレータと、アノード電極と、電解質と、カソード電極とから成るものであり、
上記有機物含有無機シール材中の有機物を除去する有機物除去工程を有し、
上記有機物除去工程が、アノード電極側の燃料流路に酸素含有ガスを供給し、かつアノード電極側からカソード電極側に電荷が移動するように外部から電流を印加しながら加熱するものであることを特徴とする燃料電池スタックの製造方法。 - 上記アノード電極の酸化開始温度以上の温度で上記電流を印加するものであり、
上記電流の印加を開始する温度が、上記アノード電極の酸化開始温度であることを特徴とする請求項1に記載の燃料電池スタックの製造方法。 - 上記アノード電極の温度に基づいて上記電流の電流量を制御するものであり、
上記アノード電極の温度上昇と共に上記電流量を増加させることを特徴とする請求項1又は2に記載の燃料電池スタックの製造方法。 - 上記有機物除去工程が、上記アノード電極の酸化開始温度よりも高い上記有機物の酸化開始温度以上で所定時間維持し、上記有機物を除去するものであることを特徴とする請求項1~3のいずれか1つの項に記載の燃料電池スタックの製造方法。
- 上記アノード側の燃料流路に酸素含有ガスを供給する温度が、上記有機物の酸化開始温度以上であることを特徴とする請求項1~4のいずれか1つの項に記載の燃料電池スタックの製造方法。
- 上記有機物除去工程後に焼結工程を有し、
上記焼結工程が、アノード側の燃料流路への酸素含有ガスの供給を止め、上記有機物除去工程よりも温度を上昇させるものであることを特徴とする請求項1~5のいずれか1つの項に記載の燃料電池スタックの製造方法。 - 上記焼結工程が、アノード電極側に還元ガスを供給し、かつ上記電流の印加を止めることを特徴とする請求項6に記載の燃料電池スタックの製造方法。
- 上記有機物除去工程前に電極形成工程を有し、
上記電極形成工程が、上記有機物の酸化開始温度よりも低い温度で所定時間維持するものであることを特徴とする請求項1乃至7のいずれか1つの項に記載の燃料電池スタックの製造方法。 - 上記アノード電極が、金属及び/又は合金から成る金属触媒を含有するものであることを特徴とする請求項1~8のいずれか1つの項に記載の燃料電池スタックの製造方法。
- 上記燃料電池単セルが、金属支持層を有するメタルサポートセルであり、
上記金属支持層が、上記アノード電極、上記電解質及び上記カソード電極を上記アノード電極側から支持するものであることを特徴とする請求項1~9のいずれか1つの項に記載の燃料電池スタックの製造方法。
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