KR101012519B1 - Slurry for adhesive layer of metal-supported solid oxide fuel cells - Google Patents

Abstract

The present invention relates to a slurry for a bonding layer used in the manufacture of a metal support type solid oxide fuel cell, and more particularly to a metal support having a bonding layer having at least two or more layers, which has good bonding characteristics and minimizes behavior due to sintering shrinkage. The present invention relates to a slurry for bonding layers used in the manufacture of a body solid oxide fuel cell.

Slurry, metal support, solid oxide, fuel cell, bonding layer, sintering, anode

Description

Slurry for adhesive layer of metal-supported solid oxide fuel cells

The present invention relates to a slurry for a bonding layer used in the manufacture of a metal support type solid oxide fuel cell, and more particularly to a metal support having a bonding layer having at least two or more layers, which has good bonding characteristics and minimizes behavior due to sintering shrinkage. The present invention relates to a slurry for bonding layers used in the manufacture of a body solid oxide fuel cell.

Recently, the planar anode support type solid oxide fuel cell meets various requirements such as output characteristics, long-term operation characteristics, and thermal cycle characteristics. However, the biggest problems that are still difficult to solve are the sealing and the mechanical strength. Difficult to seal places great restrictions on manufacturing and operating efficiency, and the weak mechanical strength can cause severe damage to thermodynamic operation or external impact.

In order to solve these problems, overseas advanced research institutes are developing metal support type solid oxide fuel cells. The metal support type solid oxide fuel cell is a new concept solid oxide fuel cell that can increase the mechanical strength and sealing efficiency by reducing the thickness of ceramic elements by using metal as a support instead of the anode of the current anode support fuel cell. The metal support solid oxide fuel cell can solve the sealing problem between the anode and the separator at least by serving as the separator of the ceramic support fuel cell. In addition, since the metal processing process is more easily accessible than the ceramic processing process, fuel cell performance may be improved through flow path processing. In addition, as manufacturing processes are developed, manufacturing costs will be significantly reduced.

Lawrence Berkeley National Laboratory (LBNL) in the United States is focusing on researchers from solid oxide fuel cell researchers such as S. Visco. In the case of the anode support type solid oxide fuel cell, much research has been conducted on the solid oxide fuel cell to obtain a maximum power density of 1.8 W / cm ² at 800 ^° C. Recognizing the potential of metal-supported solid oxide fuel cells, various related studies have been undertaken many years ago, and recently, a maximum power density of 0.2 W / cm ² at 750 ^o C has been secured. The problem of oxidation of the metal support on the cathode side is still serious and the oxidation problem is avoided through the coating technology. In the past, LBNL used a method of stacking ceramic elements on a porous metal support when fabricating a metal support-type solid oxide fuel cell. Recently, however, a process of semi-sintering a metal support by using powder metallurgy and laminating ceramic elements thereon is used. As a metal support, Fe / Cr alloy having a size of 100 μm is used, and Al is added to adjust the sintering shrinkage. The electrolyte uses YSZ of about 10 mu m and the anode uses Ni / YSZ of about 10 mu m.

Ceres Power Ltd. of the UK is developing a low temperature metal support solid oxide fuel cell in collaboration with Imperial college. In the case of a single cell, it has a maximum power density of 0.4 W / cm ² at 570 ^o C and a stack technology of 100 W. Ceres Power uses a method of laser-forming gas channels on ferritic stainless steel in thick films and coating ceramic elements on it. About 20 micrometers CGO is used as electrolyte, Ni / CGO of about 20-30 micrometers is used as an anode, and LSCF / CGO mixed air electrode which is about 10-30 micrometers is used as a cathode. The metal support is a Ti-Nb stabilized Cr alloy whose thickness is about 100 mu m.

In the 1980s, the Argonne National Laboratory (ANL), which developed and announced an innovative planar monolithic solid oxide fuel cell (monolithic SOFC), attracted attention from metal separators, cathode channels, anode channels, and ceramic elements. All of them used a method of sintering integrally made. Ceramic elements were made and laminated using powder metallurgy. The performance was improved by controlling the content of Ni, the dispersion of Ni, and the particle size of the YSZ particles as the anode microstructure. As a unit cell performance, a maximum power density of 0.25W / cm ² was obtained at 750 ^° C. 10 탆 YSZ was used as the electrolyte, 200 탆 Ni / YSZ was used as the anode, and 20 탆 LSF was used as the cathode.

The metal support type solid oxide fuel cell of the advanced research group is difficult to solve in terms of large area and processing cost due to the characteristics of the process. Accordingly, the present invention is to provide a slurry for the bonding layer of the metal support solid oxide fuel cell used in the manufacturing method of the metal support solid oxide fuel cell of the new laminated structure.

The present invention is to provide a slurry for the bonding layer used in the optimized manufacturing method having a bonding layer of at least two or more layers of the manufacturing process for the metal support type solid oxide fuel cell.

The present invention further strengthens the joint surface of the conventional single cell and separator plate coupling structure, improves the bonding characteristics of the bonding layer and minimizes the influence of the sintering shrinkage behavior, thereby providing a unit cell having a relatively large area and at the same time bonding the separator plate. It is to provide a slurry for the bonding layer used in the optimized manufacturing method that is also relatively flat in the.

The present invention provides a slurry for a bonding layer of a metal support-type solid oxide fuel cell including a bonding layer for bonding an anode of a ceramic cell to a first metal separator through a sintering process, wherein the slurry for the bonding layer comprises a metal component. The present invention relates to a slurry for a bonding layer of a metal support-type solid oxide fuel cell comprising an anode component of the ceramic cell.

In the present invention, the bonding layer slurry may include AISI410 powder as a metal component, and may include NiO powder and 8YSZ powder as an anode component of the ceramic cell, and the slurry for the bonding layer is the first metal separation. A slurry for a first separator bonding layer applied to a plate and adhered to the first metal separator through a sintering process, wherein a weight ratio of an anode component of the ceramic cell to a metal component may be less than one. The slurry for the bonding layer includes a main material which is a mixture of AISI410 powder, NiO powder, and 8YSZ powder; Additives of at least one of Cabon, Butvar-98, Polyvinylpyrrolidone, Polyethyleneglycol; Xylene, at least one solvent of 1-Butaneol; may be included in the slurry for the bonding layer is AISI410 powder 80 ~ 90 wt%, NiO powder 6 ~ 12 wt% and 8YSZ powder 4 ~ 8 wt%, respectively, relative to the main material The bonding layer slurry may include 80 wt% of AISI410 powder, 12 wt% of NiO powder, and 8 wt% of 8YSZ powder, respectively; Cabon 5 wt%, Butvar-98 3 wt%, Polyvinylpyrrolidone 5 wt%, Polyethyleneglycol 10 wt% relative to the main materials; Xylene 39 wt%, 1-Butaneol 11 wt% relative to the main material; may include.

On the other hand, in the present invention, the bonding layer slurry is a slurry for the anode bonding layer is applied to the anode (anode) of the ceramic cell and bonded to the anode (anode) of the ceramic cell through a sintering process, the fuel electrode of the ceramic cell ( The weight ratio of the metal component to the anode component may be less than 1, wherein the slurry for the bonding layer includes a main material which is a mixture of AISI410 powder, NiO powder, and 8YSZ powder; At least one additive of Butvar-98, Polyvinylpyrrolidone, Polyethyleneglycol; Xylene, 1-Butaneol may include at least one solvent, the slurry for the bonding layer is 20 wt% AISI410 powder, 48 wt% NiO powder and 32 wt% 8YSZ powder, respectively, relative to the main material; 5 wt% Butvar-98, 2 wt% Polyvinylpyrrolidone, and 10 wt% Polyethyleneglycol, respectively; Xylene 234 wt%, 1-Butaneol 66 wt% relative to the main material; may include.

In the metal support solid oxide fuel cell manufactured using the slurry for the bonding layer according to the present invention, the bonding surface of the combined structure between the conventional unit cell and the separating plate becomes more robust, and the effect of the sintering shrinkage behavior is minimized so that In addition to providing a unit cell, there is an advantage of being relatively flat in the bonding of the separator.

When manufacturing a metal support-type solid oxide fuel cell using the slurry for the bonding layer according to the present invention, since the commercial ceramic cell and the commercial metal separator are sintered to each other through at least two or more bonding layers, the existing technology can be used as it is. And, there is an advantage in manufacturing cost and large area.

First, an example of a method of manufacturing a metal support solid oxide fuel cell using the slurry for the bonding layer of the metal support solid oxide fuel cell according to the present invention will be described.

1 is a flow chart of a method of manufacturing a metal support solid oxide fuel cell using the slurry for the bonding layer according to the present invention, and FIG. 2 is a cross-sectional view of an essential part of the metal support solid oxide fuel cell manufactured by the process of FIG. FIG. 3 is a flowchart of the sintering step of FIG. 1, and FIG. 4 is an SEM image of the main part of the metal support solid oxide fuel cell manufactured by the process of FIG.

Referring to FIG. 1, a method of manufacturing a metal support-type solid oxide fuel cell may include forming a first separator bonding layer (S10), forming a cathode bonding layer (S20), forming an intermediate slurry layer (S30), and laminating step (S40). ) And a sintering step (S50).

Referring to FIG. 2, the metal support-type solid oxide fuel cell manufactured by the process of FIG. 1 may include a first metal separator 10, a second metal separator 20, a first metal separator 10 and a second metal separator. It includes a ceramic cell 30 installed between the metal separator plate 20. The ceramic cell 30 is composed of an electrolyte 32, an anode 34, and a cathode 36. The current collector 40 may be formed between the cathode 36 and the second metal separator 20.

The elements of the ceramic cell 30 of the electrolyte 32 and the anode 34 may be stacked using a tape casting process. As the electrolyte 32, YSZ (Tosoh TZ-8Y) can be used, and as the anode 34, NiO and YSZ (Tosoh TZ-8Y) can be mixed and used in a 6: 4 mass ratio. The slurry for tape casting was mixed with 15% wt. Binder Butvar B-98, 2% wt. Dispersant polyvinylpyrrolidone, 10% wt. Plasticizer polyethylene glycol, and 100% wt. Solvent S-NECS for each powder. Can be obtained by ball milling for 48 hours. After de-airing the slurry, a ceramic sheet is secured by using a tape caster having a height of 150 μm or 250 μm. After laminating according to the intended use, it is sintered at 1500 ^° C. for 4 hours to obtain a ceramic cell of an anode with a dense electrolyte and some pores.

As the metal support used as the first metal separation plate 10 and the second metal separation plate 20, a circular STS430 plate having a diameter of 28 mm and a thickness of 1 mm may be used. The anode flow path 12 and the cathode flow path 22 may be formed in a cross-sectional shape in the first metal separation plate 10 and the second metal separation plate 20. The width of the anode flow path 12 and the cathode flow path 22 may be 0.4 mm, respectively.

Referring to FIG. 2, in the first separation plate bonding layer forming step S10, the first separation plate bonding layer 52 is formed on one side of the first metal separation plate 10. The first separation plate bonding layer 52 is a room temperature after applying a slurry containing a metal powder and the powder of the anode 34 of the ceramic cell 30 to one side of the first metal separation plate 10. It is a solid content layer formed by drying at. The most important requirement of the slurry applied to the first metal separator 10 is that there should be little sintering shrinkage during sintering. Therefore, the slurry applied to the first metal separator 10 may be made of a metal powder (alloy such as stainless steel, Inconel, etc. having a size of several μm to several hundred μm) having a relatively large particle diameter so that shrinkage during sintering may be minimized. It is preferable to add a lot. In addition, the slurry applied to the first metal separation plate 10 is applied relatively thick, such as tens of μm to several hundred μm, and then serves as a sponge between the hard ceramic cell 30 and the hard first metal separation plate 10. By doing so, it is preferable that all the bonding surfaces between the ceramic cell 30 and the hard first metal separation plate 10 be adhered evenly by a slight pressure. On the other hand, the slurry applied to the first metal separator 10 includes a binder, a dispersant, a plasticizer and a pore former as an additive, where the pore former may be carbon.

On the first metal separator 10 Applied In slurry  Regarding the present invention In one embodiment  It will be described in more detail.

Referring to FIG. 2, in an anode bonding layer forming step (S20), an anode junction including an anode 34 component of the ceramic cell 30 is formed on one side of an anode 34 of the ceramic cell 30. Layer 54 is formed. The anode bonding layer 54 is formed by applying a slurry containing a metal powder and a powder of an anode 34 component of the ceramic cell 30 to one side of an anode 34 of the ceramic cell 30. It is a slurry layer formed. The most important requirement of the slurry layer applied to the anode 34 of the ceramic cell 30 is good bonding with the anode 34 during sintering. Therefore, the composition of the slurry to be applied to the anode 34 of the ceramic cell 30 preferably contains a lot of anode 34 material. On the other hand, since the ratio of the anode 34 component is high and the sinter shrinkage is large, the slurry applied to the anode 34 of the ceramic cell 30 should be as thin as possible to prevent adverse effects due to the sinter shrinkage. Therefore, the slurry applied to the anode 34 of the ceramic cell 30 is to have a thickness of several tens nm to several μm. Meanwhile, the slurry applied to the anode 34 of the ceramic cell 30 may include a binder, a dispersant, a plasticizer as an additive, and the pore former may be carbon.

remind Ceramic cell 30 To the anode 34 Applied In slurry  Regarding the present invention In one embodiment  It is detailed.

Referring to FIG. 2, in the intermediate slurry layer forming step (S30), the intermediate slurry layer 56 is formed on the first separation plate bonding layer 52, which is a solid component layer. The intermediate slurry layer 56 is formed by applying the same slurry as that applied to the anode 34 of the ceramic cell 30 to the first separator plate bonding layer 52 which is a solid component layer. Similarly, the intermediate slurry layer 56 has a high proportion of the anode 34 and thus has a large sinter shrinkage, so that the medium slurry layer 56 should be as thin as possible to prevent adverse effects due to sinter shrinkage. Therefore, the slurry applied to the first separation plate bonding layer 52 which is the solid component layer is to have a thickness of several tens of nm to several μm.

Referring to FIG. 2, in the stacking step S40, the first separator plate bonding layer 52 and the anode bonding layer 54 may include an anode 34 of the first metal separator plate 10 and the ceramic cell 30. It is laminated so as to form one outer shell layer and the other outer shell layer of the bonding layer 50 consisting of a multi-layer for bonding. Meanwhile, in the stacking step S40, the slurry layer, which is the anode bonding layer 54, and the intermediate slurry layer 56 may be stacked to directly contact each other.

In the sintering step S50, the laminated bonding layer 50 is sintered to bond the first metal separator 10 and the anode 34 of the ceramic cell 30 to each other through the bonding layer 50. . Sintering step (S50) is carried out in a sintering furnace capable of air or reducing atmosphere. The air atmosphere refers to a state in which air is supplied into the sintering furnace, and the reducing atmosphere refers to a state in which a reducing gas such as hydrogen, nitrogen, and argon is supplied into the sintering furnace.

Referring to FIG. 3, the sintering step S50 may include a first temperature raising step S51, a first isothermal step S52, a second temperature rising step S53, a second isothermal step S54, a switching step S55, and a fifth step. And a third temperature raising step S56, a third isothermal step S57, and a temperature lowering step S58.

Temperature ( ^o C ) Hour atmosphere purpose 400 to 500 at room temperature 10-30 air Slowly raise the temperature as the additive does not affect the surrounding powder as it flies away 400 ~ 500 maintenance 1-3 air Keep the temperature for the additive to burn completely

400-500 to 800-1000 2 ~ 5 air When carbon is used as a pore former, the temperature of carbon burning is about 700 ~ 800 ^o C, so the temperature is raised to 800 ~ 1000 ^o C 800-1000 maintenance 1-3 Convert from air to reducing atmosphere in the middle of maintaining temperature Maintaining an air atmosphere to burn carbon completely, changing to a reducing atmosphere to prevent oxidation of metals above this temperature 800-1000 to 1300-1500 0.5 ~ 2 Reducing atmosphere It is recommended to raise the temperature as quickly as possible to the maximum temperature of 1300 ~ 1500 ^o C. This is to minimize the effect of sinter shrinkage. Maintain 1300 ~ 1500 2 ~ 20 Reducing atmosphere Maintain temperature to achieve a good bond at the joint At room temperature from 1300-1500 3 ~ 10 Reducing atmosphere

Referring to [Table 1], in the first temperature raising step S51, the temperature in the sintering furnace is raised from room temperature to the first temperature. The first temperature raising step S51 is performed in an air atmosphere for 10 to 30 hours. That is, in the first heating step (S51) is slowly heated up so as not to affect the surrounding powder when the additive contained in the bonding layer 50 is burned off. The first temperature may be any temperature of 400 to 500 ° C.

Referring to [Table 1], in the first isothermal step S52, the temperature in the sintering furnace is kept constant at the first temperature. The first isothermal step (S52) is performed in the air atmosphere for 1 to 3 hours. The first isothermal step S52 is performed to completely burn the binder, the dispersant, and the plasticizer among the additives contained in the bonding layer 50.

Referring to [Table 1], in the second temperature raising step S53, the temperature in the sintering furnace is raised from the first temperature to the second temperature. The second temperature raising step S53 is performed in an air atmosphere for 2 to 5 hours. When carbon is used as a pore former among the additives contained in the bonding layer 50, the carbon is burned at a temperature of about 700 to 800 ° C., and thus, in the second heating step S53, the temperature in the sintering furnace reaches an arbitrary temperature of 800 to 1000 ° C. Is raised. That is, the second temperature may be any temperature of 800 ~ 1000 ℃.

Referring to [Table 1], in the second isothermal step S54, the temperature in the sintering furnace is kept constant at the second temperature. The second isothermal step S54 is performed in an air atmosphere for 1 to 1.5 hours. The second isothermal step S54 is performed to completely burn carbon when carbon is used as a pore former among the additives contained in the bonding layer 50.

Referring to [Table 1] in the conversion step (S55), the atmosphere in the sinter is converted from the air atmosphere to the reducing atmosphere. The switching step S55 may be performed for 1 to 1.5 hours while the second temperature is maintained. Changing the atmosphere in the sintering furnace to the switching atmosphere in the converting step (S55) means that when the temperature in the sintering furnace rises above the second temperature, the first metal separator 10, the second metal separator 20, and the bonding layer ( 50) to prevent oxidation of metal components contained in the back and the like.

Referring to [Table 1], in the third temperature increase step S56, the temperature in the sintering furnace is increased from the second temperature to the third temperature. The third temperature raising step S56 is performed in a reducing atmosphere for 0.5 to 2 hours. That is, the reducing atmosphere is performed quickly over a short time, which is to minimize the effect of the sintering shrinkage of the bonding layer (50). The third temperature may be any temperature of 1300-1500 ° C.

Referring to [Table 1], in the third isothermal step S57, the temperature in the sintering furnace is kept constant at the third temperature. The third isothermal step S57 is performed in a reducing atmosphere for 2 to 20 hours. In the third isothermal step S57, a bonding surface between the first metal separator 10 and the first separator bonding layer 52, a bonding between the first separator bonding layer 52 and the intermediate slurry layer 56 is performed. Good bonding is achieved at the surface, the bonding surface between the anode bonding layer 54 and the anode 34, and the like, and the anode 34 between the first metal separator 10 and the ceramic cell 30 is formed. This is to enhance the adhesion.

Referring to [Table 1] in the temperature reduction step (S58), the temperature in the sintering furnace is lowered to the room temperature from the third temperature. Dropping step (S58) is carried out in a reducing atmosphere for 3 to 10 hours.

4 is an SEM image of a main part of a metal support solid oxide fuel cell manufactured by the process of FIG.

In the metal support-type solid oxide fuel cell manufactured by the process of FIG. 1, the bonding surface of the bonding structure between the ceramic cell 30 and the first metal separation plate 10 becomes more robust, and the sintering shrinkage of the bonding layer 50 is performed. Since the influence of the behavior is minimized, even when the ceramic cell 30 and the first metal separation plate 10 having a relatively large area are combined, they can be manufactured relatively flat.

Hereinafter, an embodiment of a slurry for a bonding layer of a metal support solid oxide fuel cell according to the present invention will be described.

Example 1

Example 1 is for the bonding layer of the metal support-type solid oxide fuel cell is applied to the first metal separator 10 Relates to a slurry .

The slurry for the bonding layer of Example 1 is a slurry for the first bonding plate bonding layer which is applied to the first metal separating plate 10 and adhered to the first metal separating plate 10 through a sintering process. An anode 34 component, an additive, and a solvent.

The metal component includes AISI410 powder, and the anode 34 component of the ceramic cell 30 includes NiO powder and 8YSZ powder.

AISI410: NiO:
YSZ (wt%) 50: 30:
20 70: 18:
12 80: 12:
8 90: 6:
4 100: 0:
0 Surface
appearance severely
cracked slightly
cracked non-
cracked non-
cracked non-
cracked Surface

roughness
smooth
smooth
smooth
smooth
coarse

Table 2 shows the results of applying the slurry to the first separation plate bonding layer 52 in the range of tens of micrometers to several hundreds of micrometers and sintering in a reducing atmosphere at 1400 ° C.

If the surface of the first separation plate bonding layer 52 is smooth and there is no cracking, the first separation plate bonding layer 52 adheres well to the anode 34 of the ceramic cell 30 to be directly or indirectly stacked thereon, thereby maintaining a flat structure. . The most important requirement of the slurry for the bonding layer of Example 1 is that there should be little sinter shrinkage upon sintering. Therefore, in the slurry for the bonding layer of Example 1, a metal powder having a relatively large particle size (powder having a size of several micrometers to several hundred micrometers) is added to minimize the sintering shrinkage during sintering, and the ceramic for the metal component It is preferable that the weight ratio of the anode component of the cell is less than one.

When the mixture of AISI410 powder, NiO powder, and 8YSZ powder is the main material, referring to [Table 2], the slurry for the bonding layer of Example 1 is 80 to 90 wt% of AISI410 powder, 6 to 12 wt% of NiO powder, and the main material, respectively. It can be seen that it is suitable to include 4 to 8 wt% of 8YSZ powder.

The slurry for the bonding layer of Example 1 may include pore former, binder, dispersant, plasticizer as an additive, the pore former may be Carbon, the binder may be Butvar-98, the dispersant may be Polyvinylpyrrolidone, and the plasticizer It may be Polyethyleneglycol.

The solvent of the slurry for the bonding layer of Example 1 may be any one of Xylene, 1-Butaneol, or a mixture thereof.

Table 3 below shows an example of the slurry composition for a bonding layer of Example 1.

material weight%
Main material
AISI410 80% of main ingredients NiO 12% compared to the main material 8YSZ 8% compared to the main material
additive

Cabon 5% compared to the main material Butvar-98 3% compared to the main material Polyvinylpyrrolidone 5% compared to the main material Polyethyleneglycol 10% compared to the main material menstruum
Xylene 39% of main ingredient 1-Butaneol 11% compared to the main material

Referring to [Table 3], the slurry for the bonding layer of Example 1 includes, as a main material, 80 wt% of AISI410 powder, 12 wt% of NiO powder, and 8 wt% of 8YSZ powder, respectively, compared to the main material, and Cabon 5 wt of the main material as a pore former. 3% by weight of Butvar-98 as a binder, 3% by weight of Polyvinylpyrrolidone as a dispersant, 10% by weight of Polyethyleneglycol as a plasticizer, and 39% by weight of Xylene as a solvent. % And 11 wt% 1-Butaneol relative to the main material.

Example 2

Example 2 of the ceramic cell 30 To the anode 34 For bonding layer of metal support type solid oxide fuel cell applied Relates to a slurry .

The slurry for the bonding layer of Example 2 is applied as a slurry for the anode bonding layer of the ceramic cell 30 is applied to the anode 32 of the ceramic cell 30 and adhered to the anode 32 of the ceramic cell 30 through a sintering process. A component, an anode 34 component, an additive, and a solvent of the ceramic cell 30.

The metal component includes AISI410 powder, and the anode 34 component of the ceramic cell 30 includes NiO powder and 8YSZ powder.

The most important requirement of the slurry for the bonding layer of Example 2 is good bonding with the anode 34 during sintering. Therefore, it is preferable that the slurry composition for bonding layers of Example 2 contains many anode 34 materials. To this end, in the slurry for the bonding layer of Example 2, the weight ratio of the metal component powder to the anode 34 component powder of the ceramic cell 30 is less than one.

The slurry for the bonding layer of Example 2 may include a binder, a dispersant, a plasticizer as an additive, the pore former may be Carbon, the binder may be Butvar-98, the dispersant may be Polyvinylpyrrolidone, and the plasticizer may be Polyethyleneglycol have. On the other hand, the additive of the slurry for the bonding layer of Example 2 may be excluded pore former.

The solvent of the slurry for the bonding layer of Example 2 may be any one of Xylene, 1-Butaneol, or a mixture thereof.

Table 4 below shows an example of the slurry composition for a bonding layer of Example 2.

material weight%
Main material
AISI410 20% compared to the main material NiO 48% compared to the main material 8YSZ 32% compared to the main material
additive
Butvar-98 5% compared to the main material Polyvinylpyrrolidone 2% compared to the main material Polyethyleneglycol 10% compared to the main material menstruum
Xylene 234% of main ingredient 1-Butaneol 66% compared to the main material

When the mixture of AISI410 powder, NiO powder, and 8YSZ powder is the main material, referring to [Table 4], the slurry for the bonding layer of Example 2 is the main material, which is 20 wt% of AISI410 powder, 48 wt% of NiO powder, and 8YSZ, respectively. Contains 32 wt% of powder, 5 wt% of Butvar-98 as a binder, 2 wt% of Polyvinylpyrrolidone as a dispersing agent, 2 wt% of Polyvinylpyrrolidone as a dispersant, 10 wt% of Polyethyleneglycol as a solvent, and a solvent It may contain 234 wt% of xylene and 66 wt% of 1-butaneol relative to the main material. When the pore former is included as an additive, the pore former may be 10 wt% or less of carbon relative to the main material.

The present invention is not limited thereto. The slurry for the bonding layer of the metal support-type solid oxide fuel cell according to the present invention is applied between the first metal separator 10 and the anode of the ceramic cell 30 and sintered so that the first metal separator 10 and the ceramic cell ( And a slurry used for the adhesive layer for adhering the anode of 30). Therefore, if the slurry having the same composition as in Example 1 and Example 2 to achieve the bonding layer 50, it corresponds to the slurry according to the present invention irrespective of the application position and application order.

1 is a flow chart of a method of manufacturing a metal support solid oxide fuel cell using the slurry for the bonding layer according to the present invention.

FIG. 2 is a sectional view of an essential part of a metal support-type solid oxide fuel cell manufactured by the process of FIG.

3 is a flow chart of the sintering step of FIG.

4 is an SEM image of a main part of a metal support-type solid oxide fuel cell manufactured by the process of FIG.

<Description of the symbols for the main parts of the drawings>

10: first metal separator 12: fuel electrode flow path

20: second metal separator plate 22: air electrode flow path

30: ceramic cell 32: electrolyte

34: fuel electrode 36: air electrode

40: current collector

50: bonding layer 52: first separation plate bonding layer

54: fuel electrode bonding layer 56: mediated slurry layer

Claims (9)

In the slurry for the bonding layer of the metal support-type solid oxide fuel cell comprising a bonding layer for bonding the anode of the ceramic cell and the first metal separator through a sintering process, Slurry for the bonding layer of the metal support solid oxide fuel cell, characterized in that the slurry for the bonding layer comprises a metal component and an anode component of the ceramic cell. The method of claim 1, The bonding layer slurry comprises AISI410 powder as a metal component, and NiO powder and 8YSZ powder as an anode component of the ceramic cell. The method of claim 2, The slurry for the bonding layer is a slurry for the first separator bonding layer which is applied to the first metal separator and adheres to the first metal separator through a sintering process, wherein the anode component of the ceramic cell with respect to the metal component is formed. Slurry for a bonding layer of a metal support-type solid oxide fuel cell, characterized in that the weight ratio is less than one. The slurry for the bonding layer according to claim 2 or 3, wherein A main material which is a mixture of AISI410 powder, NiO powder, and 8YSZ powder; Additives of at least one of Cabon, Butvar-98, Polyvinylpyrrolidone, Polyethyleneglycol; At least one solvent of Xylene, 1-Butaneol; Slurry for the bonding layer of the metal support-type solid oxide fuel cell comprising a. The method of claim 4, wherein Slurry for the bonding layer of the metal support solid oxide fuel cell, characterized in that the slurry for the bonding layer comprises AISI410 powder 80 ~ 90 wt%, NiO powder 6 ~ 12 wt% and 8YSZ powder 4 ~ 8 wt%, respectively. The slurry for the bonding layer according to claim 5, 80 wt% of AISI410 powder, 12 wt% of NiO powder and 8 wt% of 8YSZ powder, respectively; Cabon 5 wt%, Butvar-98 3 wt%, Polyvinylpyrrolidone 5 wt%, Polyethyleneglycol 10 wt% relative to the main materials; 39 wt% of Xylene and 11 wt% of 1-Butaneol relative to the main material; Slurry for the bonding layer of the metal support-type solid oxide fuel cell comprising a. The method of claim 2, The slurry for the bonding layer is a slurry for the anode bonding layer that is applied to the anode of the ceramic cell and adheres to the anode of the ceramic cell through a sintering process, and the metal component of the anode component of the ceramic cell. Slurry for the bonding layer of the metal support-type solid oxide fuel cell, characterized in that the weight ratio of less than 1. The slurry for the bonding layer according to claim 2 or 7, A main material which is a mixture of AISI410 powder, NiO powder, and 8YSZ powder; At least one additive of Butvar-98, Polyvinylpyrrolidone, Polyethyleneglycol; At least one solvent of Xylene, 1-Butaneol; Slurry for the bonding layer of the metal support-type solid oxide fuel cell comprising a. The method of claim 8, wherein the slurry for the bonding layer, 20 wt% of AISI410 powder, 48 wt% of NiO powder, and 32 wt% of 8YSZ powder, respectively; 5 wt% Butvar-98, 2 wt% Polyvinylpyrrolidone, and 10 wt% Polyethyleneglycol, respectively; 234 wt% of Xylene and 66 wt% of 1-Butaneol relative to the main material; Slurry for the bonding layer of the metal support-type solid oxide fuel cell comprising a.

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