KR101644690B1 - Ceramic support body, method for manufacturing the same, membrane electrode assembly and fuel cell comprising the same - Google Patents

Abstract

The present disclosure relates to a method of making a ceramic support comprising pores of uniform size, a ceramic support formed by the method; A membrane electrode assembly including the membrane electrode assembly, and a fuel cell.

Description

TECHNICAL FIELD [0001] The present invention relates to a ceramic support, a method for producing the same, a membrane electrode assembly including the same, and a fuel cell. [0002]

TECHNICAL FIELD [0001] The present invention relates to a ceramic support, a method for producing the same, a membrane electrode assembly including the same, and a fuel cell.

This specification claims the benefit of Korean Patent Application No. 10-2013-0068129 filed on June 14, 2013, filed with the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference.

The ceramic support is mainly used as a separator and a fuel electrode of a solid oxide fuel cell (SOFC). Conventional membranes were formed by mixing pore formers such as carbon black, PMMA (methyl 2-methylpropanoate) and graphite with ceramic powder and then sintering to form pores.

In addition, the ceramic support has a porosity of 3 to 40% or more for facilitating the movement of materials such as fluid and gas, and has sufficient strength as a support. The porosity of the ceramic support is a structure in which a large number of pores are connected to form a passageway and the ceramic particles around them form a skeleton connected to each other. The porous support has properties of separating membranes or chemical reactions And acts as a transport passage and support for the material.

Korean Patent Publication No. 2007-0098323

An object of the present invention is to provide a ceramic support, a method for producing the same, a membrane electrode assembly including the same, and a fuel cell.

The present disclosure includes a cathode; An anode disposed opposite to the cathode; And an electrolyte membrane disposed between the cathode and the anode, wherein the electrolyte membrane comprises an electrolyte layer; And a ceramic support provided between the electrolyte layer and the anode, wherein the ceramic support includes pores penetrating from a surface opposed to the electrolyte layer to a surface facing the anode. do.

The present disclosure also relates to a method of manufacturing a semiconductor device, comprising: forming an anode; Depositing a ceramic support and an electrolyte layer on the anode to form an electrolyte membrane; And forming a cathode on the electrolyte layer, wherein the ceramic support includes pores penetrating from a surface opposed to the electrolyte layer to a surface facing the anode, the method comprising: to provide.

Also, in one embodiment of the present invention, there is provided a fuel cell stack including a separator plate provided between the membrane electrode assemblies.

Also, in one embodiment of the present disclosure, the stack; A fuel supply unit for supplying fuel to the stack; And an oxidant supply part for supplying the oxidant to the stack.

In one embodiment of the present specification, various substrates having a structure corresponding to a desired pore shape can be selected. Thus, other ceramic supports in one embodiment of the present disclosure are capable of producing uniform pore and vertical ceramic supports. The above-mentioned ceramic support can maximize the mobility of gas or liquid due to the verticalization of uniform pores and pores.

A ceramic support according to one embodiment of the present invention is manufactured by a coating method. Therefore, the ceramic portions other than the pores are strongly bonded to realize the strength of the high support.

The ceramic support according to one embodiment of the present specification can be selected from a variety of desired substrates. Therefore, a film type substrate can be selected, and the fuel cell according to one embodiment of the present invention can provide various types of fuel cells such as a flat tube type, a flat tube type, and a cylindrical type.

Further, in the embodiment of the present invention, since the substrate removed in the heat treatment process is used, there is no need to add a pore-forming agent to form the pores of the electrode, and it is economical in terms of time and / or cost with a simple coating technique.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a substrate corresponding to a mesh form according to an embodiment of the present invention; FIG.
FIG. 2 is a view showing a process of advancing the coating once or twice on a substrate corresponding to the mesh shape.
Fig. 3 is a view showing a ceramic support including pores penetrating from a surface opposite to the electrolyte layer of the electrolyte membrane to a surface facing the anode after sintering the coated substrate. Fig.
4 is a cross-sectional view of a ceramic support including pores therein according to one embodiment of the present disclosure.
5 is a cross-sectional view of an electrolyte membrane including a ceramic support according to an embodiment of the present invention.
FIG. 6 is a diagram illustrating a comparison between a cross-section of a cell according to an embodiment of the present invention and a cross-section of an existing cell.
7 is a view showing an example of a ceramic support according to an embodiment of the present invention.
Fig. 8 is a view of the surface of the ceramic support obtained by scanning electron microscope (SEM).
FIG. 9 is a SEM (scanning electron microscope) showing a cross section of a cell including the ceramic support. FIG.

Hereinafter, the present invention will be described in more detail.

In this specification, when a part is referred to as "including " an element, it is to be understood that it may include other elements as well, without departing from the other elements unless specifically stated otherwise.

The present disclosure includes a cathode; An anode disposed opposite to the cathode; And an electrolyte membrane disposed between the cathode and the anode, wherein the electrolyte membrane comprises an electrolyte layer; And a ceramic support provided between the electrolyte layer and the anode, wherein the ceramic support includes pores penetrating from a surface opposed to the electrolyte layer to a surface facing the anode. do.

7 is a view showing an example of a ceramic support according to an embodiment of the present invention. In the case of including pores penetrating from the surface opposite to the electrolyte layer to the surface facing the anode, the movement of hydrogen and liquid can be maximized.

Preferably, the pores are formed in a direction perpendicular to the surface of the electrolyte layer opposite to the anode.

In one embodiment of the present invention, the electrolyte layer is prepared by coating a slurry containing an electrolyte component on one surface of the ceramic support or by laminating electrolyte layers.

Specifically, in one embodiment of the present disclosure, the ceramic support has a porosity of 30% by volume to 70% by volume based on the total volume of the support.

The porosity of the ceramic support includes not only the pores passing through from the side close to the electrolyte layer of the ceramic support itself to the vicinity of the anode, but also the porosity of the ceramic itself.

When the porosity is 30 vol.% Or more, the supply of fuel or oxygen can be facilitated and the efficiency of the fuel cell can be improved. When the porosity is 70 vol.% Or less, the hydrogen ion conductivity is improved and the efficiency of the fuel cell is effectively improved can do.

In one embodiment of the present invention, the thickness of the ceramic support is 100 占 퐉 to 1000 占 퐉.

A fuel cell comprising a ceramic support having a thickness in the above range can improve mechanical properties, chemical resistance and dimensional stability.

As used herein, the thickness of the ceramic support means the width between the relatively large one surface of the ceramic support and the opposite surface thereof.

The thickness of the ceramic support may vary depending on porosity. For example, when the porosity is high, since the mechanical strength is lowered, the strength can be corrected by increasing the thickness. Further, when the porosity is low, the mechanical strength can be maintained even with a thin thickness.

In one embodiment of the present invention, the average diameter of the pores of the ceramic support is from 0.1 mu m to 1000 mu m.

When the average diameter of the pores of the ceramic support is 0.1 mu m or more and the average diameter of the pores is 1000 mu m or less, the formation of the electrolyte is easy when the electrolyte is formed After the thin film is formed, the thermal and mechanical properties of the fuel cell can be excellent during the operation of the fuel cell. Also, within the above range, there is an advantage that the adhesive strength between the electrolyte and the interface is improved, and the problem of shrinkage mismatch with the electrolyte does not occur.

In the present specification, the average diameter of the pores means an average value of straight lines passing through the centers of the pores. The average diameter of the pores according to one embodiment of the present disclosure may correspond to the spacing of the mesh of FIG.

In the present specification, the average diameter of the pores may be equal to or larger than the average diameter of the substrate having the structure corresponding to the pore shape, or may be larger or smaller than the average diameter of the substrate in the range of 10 to 1000 nm.

In one embodiment of the present invention, the error range with respect to the average diameter size of the pores of the ceramic support may be uniform within 10%. The ceramic support according to one embodiment of the present disclosure can be manufactured by selecting a substrate in the form of a mesh. The ceramic support produced by selecting the substrate of the mesh type may uniformly include the mesh-shaped pores as a whole.

The ceramic support according to one embodiment of the present specification uniformly contains the pores so that the supply of fuel or oxygen can be smooth.

In one embodiment of the present disclosure, the ceramic support is flat tubular, flat or cylindrical.

In one embodiment of the present disclosure, the ceramic support is flat tubular.

In one embodiment of the present disclosure, the ceramic support is cylindrical.

In one embodiment of the present specification, the description of the structure corresponding to the pore shape can be selected. Thus, in one embodiment of the present specification, a film-like substrate can be selected. In this case, in addition to the flat plate type, a ceramic support such as a flat tube or a cylindrical type can be manufactured in various forms.

5 is a cross-sectional view of an electrolyte membrane including a ceramic support according to an embodiment of the present invention.

Ceramic supports according to one embodiment of the specification include ceramics and metals. Further, the space between the meshes, that is, the portion corresponding to the space neck serves as a channel, and oxygen ions are supplied from the electrolyte layer above the ceramic support, and hydrogen is supplied through the spaces between the meshes. In addition, since it includes pores perpendicular to the surface provided with the electrolyte layer, the mobility of gas and liquid can be maximized.

FIG. 6 is a diagram illustrating a comparison between a cross-section of a cell according to an embodiment of the present invention and a cross-section of an existing cell. As can be seen from FIG. 6, a cell including pores perpendicular to the surface on which the electrolyte layer is provided can maximize gas and liquid mobility as compared with the conventional cell.

The anode and the cathode may include a catalyst layer.

The catalyst layer can promote the oxidation reaction of the fuel at the anode and accelerate the reaction of the oxidant, the hydrogen ion and the electron supplied to the cathode at the cathode, thereby improving the efficiency of the fuel cell.

Examples of the catalyst included in the catalyst layer may be selected from the group consisting of platinum, ruthenium, osmium, a transition metal, a platinum-ruthenium alloy, a platinum-osmium alloy, a platinum-palladium alloy, a platinum-transition metal alloy, , But is not limited thereto. The transition metal may be selected from the group consisting of gallium (G), titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni) (Zn), tin (Sn), molybdenum (Mo), tungsten (W), rhodium (Rh), ruthenium (Ru) and the like.

The catalyst may be used as the catalyst itself or may be supported on a carrier. That is, the anode and the cathode may include an electrode substrate and a catalyst layer formed on the electrode substrate.

In one embodiment of the present invention, the electrode substrate is a gas diffusion layer.

In one embodiment of the present invention, the electrode substrate may further include a microporous layer.

In the present specification, the electrode substrate plays a role of transferring generated in the catalyst layer together with diffusion of fuel or oxygen. Therefore, the electrode substrate may be made of an electron conductive carbon-based material or an inorganic fine particle.

The carbon-based material may be selected from, for example, carbon cloth or carbon paper.

The microporous layer may be formed of at least one selected from the group consisting of graphite, carbon nanotubes (CNT), fullerene (C60), activated carbon, vulcanized carbon black, carbon black, acetylene black, denka black, , Carbon nano rings, and carbon nanowires.

The inorganic fine particles include, but are not limited to, alumina, silica, zirconia, titania, and the like.

The electrolyte membrane is provided between the anode and the cathode, and includes the ceramic support.

The electrolyte membrane electrically separates the anode and the cathode but separates the medium, gas or liquid that transfers the hydrogen ions from the anode to the cathode during fuel cell operation.

The constituent material of the electrolyte is not limited as long as it is a solid electrolyte having ion conductivity. Specifically, the material of the electrolyte is yttria stabilized zirconia (YSZ: (Y ₂ O ₃ ) _x (ZrO ₂ ) _{1 -x} , x = 0.05 to 0.15), Scandinavian stabilized zirconium oxide (ScSZ _{: (Sc 2 O 3) x} (ZrO 2) 1 -x, x = 0.05 ~ 0.15)), samarium-doped ceria (ceria) (SDC: (Sm 2 O 3) x (CeO 2) 1 -x, x = 0.02 to 0.4) or gadolinium doped ceria (GDC: (Gd ₂ O ₃ ) _x (CeO ₂ ) _{1 -x} , x = 0.02 to 0.4).

The present disclosure also relates to a method of manufacturing a semiconductor device, comprising: forming an anode; Depositing a ceramic support and an electrolyte layer on the anode to form an electrolyte membrane; And forming a cathode on the electrolyte layer, wherein the ceramic support includes pores penetrating from a surface opposed to the electrolyte layer to a surface facing the anode, the method comprising: to provide.

The electrolyte membrane may be formed by forming the ceramic support on the anode, and forming an electrolyte layer on the ceramic support.

In one embodiment of the present disclosure, the step of forming the ceramic support comprises the steps of: preparing a slurry comprising a ceramic precursor; Coating the slurry on a mesh shaped substrate; And removing the mesh-shaped substrate by heat treatment.

In one embodiment of the present disclosure, the substrate is in the form of a mesh. In this case, unlike the case of forming the pores by using the pore-forming agent, when the mesh type is used, it is possible to provide a ceramic support having a uniform diameter and / or channel distribution of channels.

The shape of the mesh pattern may include a polygon such as a triangle, a rectangle, and a hexagon, and may include an amorphous pattern.

In one embodiment of the present disclosure, the wire diameter of the mesh is 0.1 占 퐉 to 1000 占 퐉. The diameter of the wire means the thickness of the mesh-shaped base material.

In one embodiment of the present disclosure, the spacing of the mesh is from 0.01 mm to 10 mm. The space neck means the distance between the meshes and means the distance between the nearest substrate surfaces in the mesh form.

1 is a view showing a description corresponding to a mesh form according to an embodiment of the present invention. In Fig. 1, a represents the diameter of the mesh, and b represents the space of the mesh.

In one embodiment of the present disclosure, a ceramic support comprising pores corresponding to the mesh shape is formed. Thus, the desired pore size can be adjusted to an appropriate range by selecting the size of the mesh neck corresponding to the pore shape.

In the case of using the mesh-shaped substrate according to one embodiment of the present invention, the portion corresponding to the space corresponding to b in Fig. 1 is formed by piercing through the surface facing the electrolyte layer from the surface opposed to the electrolyte layer Can be formed. The pores corresponding to the space neck may provide a main passage through which fluid or gaseous material moves.

In another embodiment, all pores of the ceramic support may serve as channels. The channel means a passage through which a fluid or a gaseous substance moves in the ceramic support.

4 is a cross-sectional view of a ceramic support including pores therein according to one embodiment of the present disclosure.

In one embodiment of the present invention, the step of forming the electrolyte membrane further comprises the step of preparing two or more of the coated substrate and laminating the prepared two or more coated substrates.

The above-prepared two or more coated substrates may be laminated to obtain a ceramic support having a desired thickness.

In one embodiment of the present disclosure, the method further comprises removing the substrate through heat treatment of the coated two or more substrates prior to laminating the coated substrate after coating the slurry.

In one embodiment of the present invention, when the above-mentioned mesh-shaped substrate is used, the ceramic support may include mesh-shaped pores. When two or more ceramic supports are stacked, a space between the meshes, The space neck may also be a channel, a passage through which a fluid or gaseous material moves within a ceramic support.

In this specification, removal means that the substrate is burned out by heat treatment. In this case, fine pores corresponding to the substrate may be formed, which may be the passage through which the fluid or gaseous material moves in the ceramic support.

Fig. 3 is a view showing a ceramic support including pores penetrating from a surface opposite to the electrolyte layer of the electrolyte membrane to a surface facing the anode after sintering the coated substrate. Fig.

The heat treatment means a temperature higher than room temperature.

In one embodiment of the present invention, the heat treatment temperature is 400 ° C to 1500 ° C.

In the heat treatment, the component corresponding to the desired pore shape is removed at a temperature of 400 ° C or higher, sintering of the substrate is started, and the sintering is excessively advanced at a temperature of 1500 ° C or lower to prevent the internal pores from disappearing.

In this specification, sintering means a phenomenon in which, when heat treatment is performed at a certain temperature, the sintering is brought into close contact with each other and hardens.

In one embodiment of the present invention, the coating may be performed by a method such as spin coating, dip coating, inkjet printing, gravure printing, spray coating, doctor blade, bar coating, gravure coating, and brush painting.

In one embodiment of the present disclosure, the coating uses a dip coating.

The dip coating may be performed by repeating one or more repetitions of dip coating in a slurry bath containing a ceramic precursor. In the case of the dip coating as described above, the surface flatness can be further improved, and the ceramic precursor can be formed on both sides of the mesh-type substrate at the same time. Further, the ceramic portions other than the pores are strongly bonded to realize a high support strength.

In addition, when using dip coating, there are economical advantages over time, cost, and / or process due to relatively simple processes compared to the prior art.

In one embodiment of the present disclosure, the coating step comprises coating the slurry once or more than once.

The step of coating the slurry includes coating and drying.

In this specification, the size of the pores included in the ceramic support can be adjusted according to the number of times of coating the substrate in mesh form, while the thickness of the coating surrounding the substrate of the mesh varies.

When the coating step is repeated twice or more, the desired coating thickness can be controlled and the coating can be coated with a strong adhesive force.

FIG. 2 is a view showing a process of advancing the coating once or twice on a substrate corresponding to the mesh shape.

In one embodiment of the present invention, the electrolyte layer is prepared by coating a slurry containing an electrolyte component on one surface of the ceramic support or by laminating electrolyte layers.

2 to 5 are examples showing a method of manufacturing a ceramic support according to an embodiment of the present invention. Figs. 2 to 3 show the steps of advancing the coating once or more than once on the base material corresponding to the mesh, and removing the formed base material by heat treatment. In addition, Fig. 4 shows an example of laminating two or more coated substrates. FIG. 5 shows a step of forming an electrolyte layer on a laminated ceramic substrate by slurry coating or electrolytic deposition.

In one embodiment of the present disclosure, the substrate comprises a polymeric resin, and the ceramic precursor comprises a ceramic and a metal salt.

In one embodiment of the present specification, the substrate in the mesh form is a polymer resin and is removed in the heat treatment.

The polymer resin may include all common polymer resins. Specifically, it may be polypropylene (PP), polyethylene (PE), polycarbonate (PC), or the like, but is not limited thereto. When a polymer resin is used, it is possible to realize a vertical pore and tube type support.

In one embodiment of the present disclosure, the ceramic precursor included in the slurry includes ceramic and metal salts.

The ceramic support is formed by heat-treating a slurry containing the above-mentioned ceramic precursor. For example, the ceramic precursor becomes a ceramic through heat treatment to form the ceramic support.

In another embodiment, the ceramic comprises a metal oxide; Metal boride; Metal carbide; And metal nitrides. The term " metal nitride "

In one embodiment of the present disclosure, the ceramic is selected from the group consisting of aluminum oxide (Al ₂ O ₃ ); Yttria stabilized zirconia (YSZ); Scandia stabilized zirconia (ScSZ); Gadolinium doped ceria (GDC); Samarium doped ceria (SDC); Lanthanum strontium gallate magnesite (LSGM); Nickel oxide (NiO); Copper oxide (CuO or Cu ₂ O); Titanium dioxide (TiO _2); And spinel (MgAl ₂ O ₄ ).

The metal salt includes a salt of various metals commonly used in the art such as nickel, copper, zirconium, yttrium, cerium, gadolinium, and the like, and a single metal salt or two or more different metal salts can be used. Specific examples of the metal salts include nickel-nitrate hexahydrate, zirconyl-nitrate hydrate, and yttrium-nitrate hexahydrate. ); Nickel-nitrate hexahydrate, gadolinium-nitrate hydrate, and cerium-nitrate hexahydrate; And copper-nitrate hexahydrate, gadolinium-nitrate hydrate, and cerium-nitrate hexahydrate. The term " cerium-nitrate hexahydrate " Combinations of multiple metal salts may be used, and the present invention is not limited to the use of these particular groups of metal salts.

In one embodiment of the present disclosure, at least a portion of the metal salt is reduced to a metal, and the ceramic is 30% to 80% by weight based on the entire support after the heat treatment, the metal is 20% to be.

Also in one embodiment of the present disclosure, the slurry comprises a plasticizer; bookbinder; Dispersing agent; And one or more selected from the group consisting of a solvent.

In one embodiment of the present disclosure, the content of the ceramic precursor is 5 wt% to 50 wt% based on the total weight of the slurry.

In another embodiment, the content of the ceramic precursor is 5 wt.% To 50 wt.%, The content of the plasticizer is 0.1 wt.% To 5 wt.% Based on the total weight of the slurry in the slurry, Is 5 wt% to 20 wt%, the content of the dispersant is 0.1 wt% to 5 wt%, and the content of the solvent is 40 wt% to 85 wt%.

The binder may be PVB (poly-vinylbutyral), PVA (poly-acrlicacid) or a mixture thereof.

The dispersing agent may be fish oil, Triton-X,? -Terpineol or a mixture thereof.

The plasticizer may be DBP (di-n-butylphthalate), PEG (polyethyleneglycol) or a mixture thereof.

The solvent may be a conventional coating solvent and may be isopropyl alcohol, normal propyl alcohol, ethanol, methanol, n-butyl acetate, toluene, alpha-terpineol or a mixture thereof.

In one embodiment of the present disclosure, the slurry has a viscosity of from 1 mPa.s to 1000 mPa.s.

The slurry has an effect of coating the substrate within the viscosity range described above and having a connecting structure on the surface of the substrate while preventing the pores of the substrate from being blocked.

In this specification, the coating thickness means the width between one surface of the ceramic support and the surface of the opposed pores closest thereto.

In one embodiment of the present disclosure, the coating thickness is 100 nm to 100 탆.

In one embodiment of the present invention, a ceramic support produced by the above production method is provided. Specifically, in one embodiment of the present specification, there is provided a ceramic support comprising pores penetrating from a surface opposite to the electrolyte layer to a surface facing the anode.

In one embodiment of the present disclosure, the mesh-like substrate comprises a component that is removed by heat treatment.

In one embodiment of the present invention, the substrate of the mesh type uses a substrate containing a component which is removed at 400 ° C to 1000 ° C.

Further, in one embodiment of the present specification, the mesh-like base material may be film-like. When a film-like substrate according to one embodiment of the present specification is used, a shape of a circular plate, a rectangular plate, or a tubular support can be produced. Therefore, the fuel cell including the ceramic support according to one embodiment of the present invention has an advantage that it can provide not only the flat plate type but also the flat tubular fuel cell.

In one embodiment of the present invention, a uniform substrate can be selected within an error range of the space size of the mesh within 10%. In this case, a ceramic support containing a uniform channel can be obtained.

In one embodiment of the present specification, the at least two membrane electrode assemblies; And a separator plate provided between each of the membrane electrode assemblies.

The separator plate serves to supply fuel and an oxidant to both sides of the membrane electrode assembly.

In another embodiment, the stack for a fuel cell includes: A fuel supply unit for supplying fuel to the stack; And an oxidant supply part for supplying the oxidant to the stack.

The fuel supply part serves to supply fuel to the stack. The fuel may be selected from the group consisting of methanol, ethanol, butanol, propanol, formic acid, aqueous hydrogen compound solution and hydrogen gas.

The fuel supply unit may include a fuel tank for storing fuel, and a fuel pump connected to the fuel tank. The fuel pump serves to discharge the fuel stored in the fuel tank by a predetermined pumping force.

The oxidant supply part serves to supply the oxidant to the stack. The oxidizing agent may be oxygen or air.

The oxidant supply part includes an oxidant pump that sucks oxidant at a predetermined pumping power.

The production of the membrane electrode assembly will be described in detail in the following examples. However, the following examples are intended to illustrate the present specification, and the scope of the present invention is not limited thereto.

Example

(1) Preparation of dip coating slurry

(NiO) and yttria stabilized zirconia (YSZ) materials, which are widely used as anode materials for solid oxide fuel cells, were used. A total of 20 g of Ni: YSZ = 40: 60 vol% was used for slurry preparation. As a solvent, 100 cc of a mixed solution of toluene and isopropyl alcohol (IPA) was used. The dispersant was prepared by mixing 0.4 cc of Triton-X and 0.4 cc of fish oil, 4 g of polyvinyl butyral (PVB) as a binder and 2 cc of dibutyl phthalate (DBP) as a plasticizer. Hour wet ball milling to prepare an anode support slurry for dip coating.

(2) a step of dip coating the polymer resin

The polyethylene resin in mesh form was immersed in the prepared slurry for 1 to 10 seconds, withdrawn at a rate of 1 to 5 mm / min, and then slowly dried at room temperature to obtain a uniform film. Two sheets of the produced films were laminated to form an anode support, and the NiO-YSZ anode functional layer and the YSZ electrolyte tape fabricated by tape casting were laminated together by a hot roll laminator at 120 ° C and 0.5 MPa.

(3) Heat treatment process

A cell structure was obtained by sintering a fuel electrode support using polymer resin, an anode functional layer made of tape casting, and a YSZ electrolyte laminate.

The sintering conditions were as follows: the temperature was raised to 200 ° C at a rate of 1 ° C / min; the temperature was raised to 300 ° C for 3 hours; the temperature was increased to 500 ° C for 3 hours; And maintained at the room temperature under the condition of 5 [deg.] C / min for 3 hours.

Fig. 8 is a view of the surface of the ceramic support obtained by scanning electron microscope (SEM). As can be seen from FIG. 8, it can be seen that a ceramic support containing uniform pores is formed.

FIG. 9 is a scanning electron microscope (SEM) showing a cross section of a cell including the ceramic support. Referring to FIG. 9, it can be seen that the ceramic support has pores penetrating from the surface opposite to the electrolyte layer to the surface facing the anode, specifically, the vertical pores.

Referring to FIGS. 8 and 9, the ceramic support according to one embodiment of the present invention includes uniform and vertical pores, so that the mobility of gas and liquid in the fuel cell can be maximized.

a: the diameter of the mesh
b: Space of mesh
101: electrolyte membrane
201: Groundwork

Claims (20)

delete delete delete delete delete delete Forming an anode;
Depositing a ceramic support and an electrolyte layer on the anode to form an electrolyte membrane; And
Forming a cathode on the electrolyte layer,
The step of forming the ceramic support comprises the steps of: preparing a slurry comprising a ceramic precursor; Coating the slurry on a mesh shaped substrate; And removing the mesh-shaped substrate by heat treatment,
Wherein the ceramic support includes a through hole penetrating from a surface opposite to the electrolyte layer to a surface facing the anode,
Wherein the average diameter of the through holes of the ceramic support is 0.1 to 1000 占 퐉 and the error range with respect to the average diameter of the through holes is within 10%. delete The method of claim 7,
The step of forming the electrolyte membrane
Two or more coated substrates are prepared,
And then laminating the two or more coated substrates prepared above. The method of claim 7,
Wherein the temperature of the heat treatment is 400 占 폚 to 1500 占 폚. The method of claim 7,
Wherein the coating step uses a dip coating. The method of claim 7,
The substrate comprises a polymeric resin,
Wherein the ceramic precursor comprises a ceramic and a metal salt. The method of claim 12,
Wherein the ceramic comprises a metal oxide; Metal boride; Metal carbide; And a metal nitride. The method for producing a membrane electrode assembly according to claim 1, The method of claim 12,
Wherein at least a portion of the metal salt is reduced to a metal,
Wherein the ceramic is 30 wt% to 80 wt% based on the entire support after the heat treatment, and the metal is 20 wt% to 70 wt%. The method of claim 7,
Wherein the slurry comprises a plasticizer; bookbinder; Dispersing agent; And a solvent. The method for producing a membrane electrode assembly according to claim 1, 16. The method of claim 15,
Wherein the amount of the ceramic precursor is 5 wt% to 50 wt%, the amount of the plasticizer is 0.1 wt% to 5 wt%, and the content of the binder is 5 wt% to 20 wt%, based on the total weight of the slurry, Wherein the content of the dispersant is 0.1 wt% to 5 wt%, and the content of the solvent is 40 wt% to 85 wt%. The method of claim 7,
Wherein the slurry has a viscosity of 1 mPa 占 퐏 to 1000 mPa 占 퐏. The method of claim 7,
Wherein the coating step comprises coating the slurry one or more times repeatedly. delete delete

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