JP5248177B2 - Horizontally-striped solid oxide fuel cell stack and manufacturing method thereof - Google Patents

Description

  The present invention relates to a horizontal stripe solid oxide fuel cell stack and a method for manufacturing the same.

  A solid oxide fuel cell includes a three-layer unit in which an anode layer and a cathode layer are arranged with an electrolyte layer made of a solid oxide interposed therebetween. During operation of the solid oxide fuel cell, electric power can be obtained by passing fuel gas through the anode layer and air through the cathode layer and connecting both electrodes to an external load. However, since a single battery (cell) can only obtain a voltage of about 0.8 V at most, it is necessary to electrically connect a plurality of cells in series in order to obtain practical power. At the same time that adjacent cells are electrically connected in series, the interconnector and cells alternate for the purpose of properly distributing, supplying, and discharging fuel gas and air to and from the anode and cathode layers, respectively. Laminated.

  Such a solid oxide fuel cell is of a type in which a plurality of cells are stacked, but a solid oxide fuel cell of a type in which a plurality of cells are arranged in a horizontal stripe pattern (International Publication No. WO 2004/082058, Etc.) has also been developed. The horizontal stripe method includes a cylindrical type and a hollow flat type.

International Publication No. 2004/082058 Pamphlet

  FIG. 1 is a diagram illustrating a configuration example of a hollow flat type horizontal stripe solid oxide fuel cell. 1 (a) is a perspective view, FIG. 1 (b) is a plan view, and FIG. 1 (c) is a cross-sectional view taken along the line AA in FIG. 1 (b) (a solid line among the U-shaped AA lines). FIG. 5 is a diagram showing a cross section of a portion on the far side when the portion is cut from the front surface to the back surface). A plurality of cells 5 each including an anode layer 2, an electrolyte layer 4, and a cathode layer 6 are sequentially formed on a hollow flat electric insulating substrate 1. The adjacent cells 5 are electrically connected in series via the interconnector 3 and the current collector 7.

  As shown by arrows (→) in FIGS. 1A to 1C, the fuel gas flows through the fuel flow passage 8 in the insulating substrate 1 in parallel with the array of the cells 5. The number of the fuel flow passages 8 is not limited to one and may be plural. The cross-sectional shape is also configured in a rectangular shape (including hollow flat shape), a rectangular shape, an elliptical shape, and the like. It is also called a flat tube type because it has a hollow fuel flow passage.

  As a constituent material of the anode layer 2 constituting the cell 5, a material made of a mixture of Ni and an oxide ion conductor is used. The anode layer 2 has its skeleton formed of Ni and an oxide ion conductor.

  Ni is used in the form of nickel oxide when the insulating substrate and the anode layer 2 are formed. However, when the completed horizontal stripe SOFC is operated, a fuel gas which is a reducing gas is supplied to the fuel flow path in the insulating substrate 1. Flows, nickel oxide is reduced to Ni.

  As the constituent material of the insulating substrate 1, a mixture of MgO and zirconia is used, and the insulating substrate 1 conducts Ni in the constituent material as a fuel gas reforming catalyst. Addition in an amount that does not become sex is also performed. When Ni is contained in the constituent material of the insulating substrate 1, the skeleton is formed of, for example, MgO, zirconia, and Ni. In the case where the insulating substrate 1 contains Ni, it is used in the form of nickel oxide when the insulating substrate 1 is formed. However, when the completed horizontal stripe type SOFC is operated, it is reduced to the fuel flow path in the insulating substrate 1. Since the fuel gas which is the gas flows, nickel oxide is reduced to Ni.

  By the way, the horizontal stripe type solid oxide fuel cell usually has a laminated structure in which the insulating substrate 1 → the anode layer 2 → the electrolyte layer 4 → the cathode layer 6 are arranged from the inside to the outside. Due to this structure, during the operation, air flowing to the cathode layer 6 side flows backward from the open end of the insulating substrate 1 and enters the insulating substrate 1 side to some extent.

  For this reason, Ni that forms a skeleton in the anode layer 2 at least on the open end side is oxidized, and when the insulating substrate 1 contains Ni as a skeleton component, the Ni is oxidized. In addition, when a situation occurs in which the supply of fuel gas to the anode layer 2 side is less than the amount of fuel consumed in power generation, the oxidation region extends over a wide range and the degree of oxidation increases. Since Ni expands when oxidized, structural changes occur in the insulating substrate and the anode layer 2 in contact with the insulating substrate, as shown in FIG. Cause. Similarly, in the insulating substrate 1 containing Ni as a skeleton component, there is a risk of structural changes in the insulating substrate 1.

  The present invention reduces the structural change of the insulating substrate due to the oxidation of Ni forming the skeleton of the insulating substrate, the structural change of the anode layer 2 due to the oxidation of Ni forming the skeleton of the anode layer 2, and Has a horizontal stripe type solid oxide fuel cell stack in which the structural change of the insulating substrate 1 due to the oxidation of Ni in the insulating substrate 1 containing Ni as a skeleton component is reduced and the anti-destructive reliability is improved, and a manufacturing method thereof It is intended to provide.

  The present invention (1) comprises a plurality of cells comprising an insulating substrate having a fuel flow passage inside, and an anode layer, an electrolyte layer, and a cathode layer containing Ni and an oxide ion conductor as skeletal components on both front and back surfaces. A horizontally-striped solid oxide fuel cell stack in which adjacent cells are electrically connected in series via an interconnector, and one of the insulating substrate and the anode layer It is a horizontal stripe type solid oxide fuel cell stack characterized by carrying a metal that does not form a skeleton on one or both.

  The present invention (1) is similarly applied to the case where the insulating substrate is an insulating substrate containing Ni as a skeleton component. In this case, an insulating substrate having a fuel flow passage inside, containing Ni as a skeleton component, and carrying a metal that does not form a skeleton is used as the insulating substrate.

In the present invention (2), an insulating substrate having a fuel flow passage is formed inside, and an anode layer, an electrolyte layer, and a cathode layer containing Ni and an oxide ion conductor as skeleton components are arranged in this order on both front and back surfaces. A plurality of cells are arranged to form an interconnector between adjacent cells to produce a horizontally striped solid oxide fuel cell stack.
After forming the insulating substrate, the anode layer containing the Ni and oxide ion conductor as a skeleton component, and the electrolyte layer, the skeleton is formed in one or both of the insulating substrate and the anode layer. By impregnating a metal that does not form, at least one of the insulating substrate and the anode layer is loaded with a metal that does not form a skeleton. is there.

  The present invention (2) is similarly applied when the insulating substrate is an insulating substrate containing Ni as a skeleton component. In this case, after forming an insulating substrate having a fuel flow passage inside and containing Ni as a skeleton component as an insulating substrate, the insulating substrate is impregnated with a metal that does not form a skeleton. A metal that does not form a skeleton is supported therein.

  According to the present invention, in a horizontally-striped solid oxide fuel cell stack, a structural change of an insulating substrate containing Ni as a skeleton component, which occurs during operation, an anode layer having Ni and an oxide ion conductor as a skeleton component It is possible to reduce structural changes and improve the reliability against destruction.

  In the present invention, the metal that does not form the skeleton includes an anode having the skeleton component of Ni and an oxide ion conductor in an insulating substrate containing Ni as the skeleton component during operation of a solid oxide fuel cell. Any metal that oxidizes when air enters the layer may be used, and examples thereof include Ni, Fe, and Cu. Further, the above-described metals can also be used when a metal that does not form a skeleton is supported on an insulating substrate containing Ni as a skeleton component. Of these metals, Ni can be used as a fuel gas reforming catalyst in addition to the original purpose of the present invention.

  In the production process of the horizontal stripe type solid oxide fuel cell stack, the anode layer is formed when the horizontal stripe type solid oxide fuel cell stack is completed, and the interconnector is formed when the horizontal stripe type solid oxide fuel cell stack is completed. , What will become the electrolyte layer, what will become the cathode layer upon completion of the horizontal stripe solid oxide fuel cell stack, and what will become the current collector upon completion of the horizontal stripe solid oxide fuel cell stack . Those members produced in the production process of the horizontal stripe type solid oxide fuel cell stack are each an insulating substrate, an anode layer, an interconnector, an electrolyte when completed as a horizontal stripe type solid oxide fuel cell stack. Layer, cathode layer, current collector.

  In the present specification and claims, the manufacturing process thereof is also completed as a horizontally-striped solid oxide fuel cell stack including an insulating substrate, an anode layer, an interconnector, an electrolyte layer, a cathode layer, and a current collector. It is described using terms of time.

  The horizontal-striped solid oxide fuel cell stack of the present invention starts with the production of an insulating substrate, and sequentially produces an anode layer, an interconnector, an electrolyte layer, a cathode layer, and a current collector on the front and back surfaces of the insulating substrate. To do. There can be various deformation modes such as molding, printing, dipping and the like, firing or sintering time, firing or sintering conditions, etc., until completion as a horizontal stripe type solid oxide fuel cell stack. The embodiments of the present invention will be described in order.

  FIG. 2 is a view corresponding to FIG. 1C and corresponds to the upper portion (surface side) of the upper and lower portions. In the following description, for the insulating substrate, an insulating substrate containing Ni as a skeleton component is taken as an example, but the same applies when an insulating substrate not containing Ni as a skeleton component is manufactured.

<1. About Insulating Substrate>
FIG. 2A is a diagram for explaining an insulating substrate 1 containing Ni as a skeleton component. First, a material containing Mg as a constituent material and nickel oxide are mixed and molded to produce an insulating substrate 1 made of a material containing Mg to which nickel oxide is added. More specifically, a material containing Mg and nickel oxide are mixed and then granulated, and a green substrate having an opening (space) serving as a fuel flow passage is produced by extrusion molding or the like. For example, graphite is added to the mixture of the material containing Mg and nickel oxide, that is, the raw material powder, as an auxiliary material for facilitating molding and making it porous during firing.

Mg is easily mixed with other materials constituting the insulating substrate 1 so that the thermal expansion coefficient of the electrolyte layer 4 can be easily matched, and has advantages such as light weight and low cost. It is suitable as a constituent material of the base of the fuel cell stack. Examples of the material containing Mg include, but are not limited to, a mixture of MgO and spinel, a mixture of MgO and zirconia, a mixture of zirconia-based oxide, MgO and spinel, and the like. Examples of the zirconia oxide in the mixture of zirconia oxide and MgO and spinel include yttria stabilized zirconia [YSZ: (Y ₂ O ₃ ) _X (ZrO ₂ ) _1-X , where x = 0 0.03 to 0.12].

<2. About the anode layer>
FIG. 2B is a diagram illustrating the anode layer 2. As shown in FIG. 2B, the anode layer 2 is formed on the surface of the insulating substrate 1. This formation can be performed by screen printing, coating, or the like using the constituent material of the anode layer 2 as a slurry or paste on the surface of the insulating substrate 1. The same applies to the back side.

The constituent material of the anode layer 2 is preferably a material made of a mixture of Ni and YSZ [(Y ₂ O ₃ ) _X (ZrO ₂ ) _1-X (where x = 0.05 to 0.15)]. Is used. A material in which Ni is dispersed in an amount of 40 vol% or more in the mixture is preferable. Note that YSZ constituting the anode layer 2 corresponds to an oxide ion conductor.

<3. About interconnector>
FIG. 2C illustrates the interconnector 3. As shown in FIG. 2C, the material for the interconnector 3 is formed at the end of the surface of the anode layer 2. This formation can be performed by using a constituent material of the interconnector 3 as slurry or paste, and screen printing, coating, or the like on the part. The same applies to the back side.

<4. Electrolyte layer>
FIG. 2D is a diagram illustrating the electrolyte layer 4. As shown in FIG. 2D, the electrolyte layer 4 is formed between the surface of the anode layer 2 and the adjacent anode layer 2. This formation can be performed by screen printing, coating, or the like using the constituent material of the electrolyte layer 4 as slurry or paste. The same applies to the back side.

  Next, heat treatment, that is, firing is performed. The heat treatment is performed in the above <2. The anode layer 2 may be formed after the formation of the anode layer 2, but the heat treatment of the electrolyte layer 4 is the highest temperature in the production process of the horizontal stripe solid oxide fuel cell stack, and the skeleton is firmly formed by this heat treatment. Therefore, it is preferable that the manufacturing process for supporting the metal not forming the skeleton is after the heat treatment of the electrolyte layer 4.

<5. Supporting metals that do not form skeletons on insulating substrates and anode layers>
<4. One of the insulating layer 1 made of a material containing Mg added with nickel oxide in the state after the heat treatment in the electrolyte layer> and the anode layer 2 containing Ni and an oxide ion conductor as a skeleton component A metal that does not form a skeleton is supported on one or both.

  There are no particular limitations on the method of supporting the metal that does not form a skeleton, and any method can be used as long as it can be supported on one or both of the insulating substrate 1 and the anode layer 2. For example, when a metal that does not form a skeleton is supported on both the insulating substrate 1 and the anode layer 2 that includes Ni and an oxide ion conductor as a skeleton component, for example, the metal is a nitrate thereof. An aqueous solution in the form of a water-soluble compound, such as an insulating substrate 1 made of a material containing Mg to which nickel oxide is added, and an anode layer 2 containing Ni and an oxide ion conductor as a skeleton component are impregnated. Can be done. Prior to the impregnation, the surfaces of the interconnector 3 and the electrolyte layer 4 are masked in advance, whereby the insulating substrate 1 and the anode layer 2 can be selectively impregnated.

  Then heat. By this heating, the compound forming component of the impregnated water-soluble compound (or nitric acid when the water-soluble compound is nitrate) is removed, and the insulating substrate 1 made of a material containing Mg to which nickel oxide is added and Ni A “metal that does not form a skeleton” can be supported on the anode layer 2 that includes an oxide ion conductor as a skeleton component.

  The metal that does not form a skeleton is supported in the form of particles in the gaps in the skeleton of the insulating substrate 1 and the gaps in the skeleton of the anode layer 2. The particle is a particle that binds only to one skeleton particle and does not mechanically affect other particles when it expands.

  FIG. 2 (e) is a diagram for explaining the state after the treatment. In FIG. 2 (e), an insulating substrate 1 ′ carrying a metal not forming a skeleton, and an anode carrying a metal not forming a skeleton. Shown as layer 2 '. The insulating substrate 1 ′ is an insulating substrate carrying a metal that does not form a skeleton with respect to the insulating substrate 1 made of a material containing Mg to which nickel oxide is added. The anode layer 2 ′ is made of Ni and an oxide ion conductor. Is an anode layer supporting a metal that does not form a skeleton with respect to the anode layer 2 having a skeleton component. The metal that does not form a skeleton is a gap between the skeleton components of the insulating substrate 1 ′ and the skeleton component of the anode layer 2 ′. It is carried free in the gap.

<5. About cathode layer>
Next, the material of the cathode layer 6 is formed on the surface of the electrolyte layer 4 as shown in FIG. This formation can be performed on the surface of the electrolyte layer 4 by screen printing, coating or the like using the constituent material of the cathode layer 6 as slurry or paste. The same applies to the back side. Then, a current collector 7 is formed between the cathode layer 6 and the interconnector 3 as shown in FIG.

  In the horizontally striped solid oxide fuel cell stack, a plurality of cells 5 are arranged at intervals, and therefore, the anode layer 2 'is formed and masked appropriately in the subsequent steps.

The constituent material of the electrolyte layer 4 in the present invention may be a solid electrolyte having ionic conductivity, and examples thereof include the materials (1) to (4).
(1) Yttria-stabilized zirconia [YSZ: (Y ₂ O ₃ ) _X (ZrO ₂ ) _1-X (where x = 0.05 to 0.15)].
(2) Scandia-stabilized zirconia [(Sc ₂ O ₃ ) _X (ZrO ₂ ) _1-X (where x = 0.05 to 0.15)].
(3) Yttria-doped ceria [(Y ₂ O ₃ ) _X (CeO ₂ ) _1-X (where x = 0.02 to 0.4)].
(4) Gadria-doped ceria [(Gd ₂ O ₃ ) _X (CeO ₂ ) _1-X (where x = 0.02 to 0.4)].

Examples of the constituent material of the cathode layer 6 in the present invention include Sr-doped LaMnO ₃ , LSC (La _0.6 Sr _0.4 Co _1.0 O ₃ , etc.), LSCF (La _0.6 Sr _0.4 Co _0.2 Fe _0.8 O ₃ , La _0.6 Sr _0.4 Co _0.2 Fe _0.8 O ₃ , etc.), LSM (LaSrMnO ₃ , etc.) and the like, but are not limited thereto.

Examples of the constituent material of the interconnector 3 in the present invention include (1) La, Cr, Y, Ce, Ca, Sr, Mg, Ba, Ni, Fe, Co, Mn, Ti, Nd, Pb, Bi, and Cu. Perovskite-type ceramics composed of two or more of them, (2) Formula: (Ln, M) CrO ₃ (wherein Ln is a lanthanoid, M is Ba, Ca, Mg or Sr), _{3): M (Ti 1-X Nb} X) O 3 ( where, M = Ba, Ca, Li , Pb, Bi, Cu, Sr, La, at least one element selected from Mg and Ce, Examples thereof include, but are not limited to, an electrically conductive oxide represented by x = 0 to 0.4) or a material containing these oxides.

  Hereinafter, the present invention will be described in more detail based on experimental examples, but the present invention is not limited to the experimental examples.

  In this experimental example, Ni was supported as an example of a metal that does not form a skeleton with respect to the anode layer having Ni and an oxide ion conductor as a skeleton component, and the effect of improving the reoxidation resistance by the Ni support was tested. Is.

  A plurality (ten) of anode layer 2 samples having Ni and oxide ion conductors as skeleton components were produced as follows. An organic solvent, a dispersant, an antifoaming agent, and an organic binder were added to a powder obtained by mixing NiO and yttria-stabilized zirconia at a weight ratio of 2: 3, and then mixed by a ball mill to prepare a paste. A tablet-like sample was prepared using this paste. Both front and back surfaces of the sample were flat, and the thickness was 2 mm. FIG. 3 shows the shape of each sample.

Half of the samples (5) were immersed in an aqueous nickel nitrate [Ni (NO ₃ ) ₂ ] solution. The impregnation amount of nickel nitrate was such that Ni = 20 with respect to Ni = 100 in the anode layer 2 having Ni and an oxide ion conductor as a skeleton component in mass ratio (Ni conversion). Subsequently, it heated to 1100 degreeC in the air, the impregnated nickel nitrate was changed into nickel oxide (NiO), and also it reduced in the hydrogen atmosphere.

  Thus, five samples of the anode layer 2 having Ni and oxide ion conductor as a skeleton component, and Ni which is a metal that does not form a skeleton in the anode layer 2 having Ni and oxide ion conductor as a skeleton component. Five samples having a supported anode layer 2 'were prepared.

  The samples of both groups were tested for resistance improvement due to oxidation treatment. In the test, each sample was put in a sealed container placed in an electric furnace and heated to 800 ° C. while reducing the pressure with a vacuum pump. After holding at this temperature for a predetermined time in an air atmosphere (the holding time is described as “reoxidation time” in Table 1 to be described later), it was cooled to room temperature while reducing the pressure with a vacuum pump.

  The volume and weight of each of the samples before and after the treatment were measured, and the effect of whether or not Ni was supported was evaluated by observing the volume change, the presence or absence of the weight change, and the degree of the change. The volume change was performed by measuring the diameter of each sample as shown as “a” in FIG. Table 1 shows the results.

  As shown in Table 1, at a reoxidation treatment time of 60 minutes, the volume change rate and the weight change rate of the sample without Ni support were 0.58% and 10.34%, respectively, whereas the sample with Ni support was The volume change rate and the weight change rate are 0.45% and 9.46%, respectively. Moreover, in the reoxidation treatment time of 10 minutes, the volume change rate and the weight change rate of the sample without Ni support were 0.90% and 8.50%, respectively, whereas the volume change of the sample with Ni support was The rate of change and the rate of weight change were 0.52% and 7.19%, respectively. From this, it can be seen that in any of these cases, the volume change rate and the weight change rate of the Ni-supported sample are small.

  Thus, by supporting Ni which is a metal that does not form a skeleton in the anode layer having Ni and oxide ion conductor as a skeleton component, the anode layer having Ni and oxide ion conductor as a skeleton component is supported. Structural change can be reduced, and reliability against destruction can be improved.

  Observation of the Ni-supported sample by SEM photograph shows that the supported free Ni is in the form of particles, and the majority of the Ni particles are only one particle each forming a skeleton in each oxide ion conductor. Bonding was observed. From the bonding situation, it is assumed that when it expands, it does not mechanically affect other particles in the vicinity.

  FIG. 4 (b) explains the results of the discussion on the action and effect of Ni, which is a metal that does not form a skeleton supported on an anode layer having Ni and an oxide ion conductor as a skeleton component, based on the above experimental results. It is a figure to do. As shown in FIG. 4B as Ni that does not form a skeleton, at the start of the horizontal stripe solid oxide fuel cell stack, the anode layer 2 ′ having Ni and an oxide ion conductor as a skeleton component is used. It exists in a free state in the inside gap.

  In the horizontally-striped solid oxide fuel cell stack of the present invention, Ni that is a metal that does not form a skeleton is present in a free state in a gap in the anode layer 2 ′ that includes Ni and an oxide ion conductor as a skeleton component. Therefore, the free Ni is oxidized in place of Ni as a skeleton component in the anode layer 2 ′ having Ni and an oxide ion conductor as a skeleton component, that is, as a “substitution”. It is possible to avoid or reduce the oxidation of the component Ni. That is, the oxidation of Ni that does not form a skeleton reduces the oxidation of Ni that forms the skeleton, and reduces the occurrence of cracks due to the oxidation of Ni that forms the skeleton.

  As described above, due to the structure of the horizontally-striped solid oxide fuel cell stack, the air flowing to the cathode layer 6 side flows backward from the open end of the insulating substrate 1 during the operation, and to some extent on the insulating substrate 1 side. When an intrusion occurs and the amount of fuel gas supplied to the anode layer 2 side is insufficient compared to the amount of fuel consumed in power generation, the oxidation region is widened and the degree of oxidation The skeletal component Ni that is initially reduced at the start of operation is oxidized and expands.

  Then, structural changes occur in the insulating substrate 1 and the anode layer 2 to cause destruction and failure of the cell 5. In the horizontal stripe solid oxide fuel cell stack of the present invention, the insulating substrate 1 and the anode layer Since free Ni that does not form a skeleton in 2 ′ is oxidized, it is possible to avoid or reduce the destruction or failure of the cell 5 due to the structural change caused by the oxidation of Ni as the skeleton component.

  Even in the case where the insulating substrate 1 contains Ni as a skeleton component, a free metal that does not form a skeleton in the insulating substrate 1 ′ can be obtained by supporting a metal that does not form a skeleton in the same manner as the anode layer 2 ′ described above. It is possible to avoid or reduce the destruction or failure of the cell 5 due to the structural change caused by the oxidation of Ni and the oxidation of the framework component Ni.

The figure explaining the structural example of a hollow flat type horizontal stripe type solid oxide fuel cell The figure explaining the example of a manufacturing process of the horizontal stripe type solid oxide fuel cell stack of this invention Diagram showing the shape of each sample in the experimental example The figure explaining the consideration result about the effect | action and effect of "Ni which is a metal which does not form a frame | skeleton" based on the experimental result in an experiment example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Insulating board | substrate 1 'Insulating board | substrate which carry | supported the metal which does not form skeleton 2 Anode layer 2' Anode layer which carried | supported the metal which does not form skeleton 3 Interconnector 4 Electrolyte layer 5 Cell 6 Cathode layer 7 Current collector ( Interconnector)
8 Fuel flow path

Claims (4)

An insulating substrate having a fuel flow passage therein, and a plurality of cells each including an anode layer, an electrolyte layer, and a cathode layer containing Ni and an oxide ion conductor as skeleton components are arranged on both front and back surfaces, and adjacent cells. A horizontally-striped solid oxide fuel cell stack, which is electrically connected in series with each other via an interconnector, wherein Ni, Fe are provided in one or both of the insulating substrate and the anode layer. Alternatively, a horizontally-striped solid oxide fuel cell stack comprising a metal made of Cu and not forming a skeleton. 2. The horizontally striped solid oxide fuel cell stack according to claim 1, wherein the insulating substrate contains Ni as a skeleton component and carries a metal that does not form a skeleton composed of Ni, Fe, or Cu. Horizontal stripe type solid oxide fuel cell stack. An insulating substrate having a fuel flow passage is formed inside, and an anode layer, an electrolyte layer, and a cathode layer having Ni and oxide ion conductors as skeleton components are arranged in this order on both the front and back surfaces of a plurality of cells. And forming a horizontal stripe type solid oxide fuel cell stack by forming an interconnector between adjacent cells,
After forming the insulating substrate, the anode layer having the Ni and oxide ion conductor as a skeleton component, and the electrolyte layer, Ni is formed in one or both of the insulating substrate and the anode layer , By impregnating a metal that does not form a skeleton composed of Fe or Cu, a metal that does not form a skeleton composed of Ni, Fe, or Cu is supported on at least one of the insulating substrate and the anode layer. A method for producing a horizontal stripe solid oxide fuel cell stack. 4. The method of manufacturing a horizontal stripe solid oxide fuel cell stack according to claim 3 , wherein after forming the insulating substrate containing Ni as a skeleton component, a skeleton made of Ni, Fe or Cu is formed in the insulating substrate. A method for producing a horizontal stripe solid oxide fuel cell stack, wherein a metal that does not form a skeleton made of Ni, Fe, or Cu is supported on the insulating substrate by impregnating a metal that is not formed.

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