KR20060001630A - Electrode for fuel cell, fuel cell comprising the same, and method for preparing the electrode - Google Patents

Abstract

The present invention relates to a fuel cell electrode, a fuel cell including the same, and a method for manufacturing the electrode for a fuel cell, and more particularly, an electrode substrate, and a nanocarbon layer formed on the surface of the electrode substrate and the coating coated on the nanocarbon layer. The present invention relates to a fuel cell electrode including a catalyst layer including a catalyst, a fuel cell including the same, and a method for manufacturing the electrode for a fuel cell.

The electrode for a fuel cell of the present invention has an advantage that the surface area of the catalyst is large and the performance of the fuel cell can be improved while using a small amount of the catalyst.

Fuel cell, catalyst, surface area, nanocarbon, electrode, membrane-electrode assembly

Description

Electrode for fuel cell, fuel cell comprising same and method for manufacturing electrode for fuel cell {ELECTRODE FOR FUEL CELL, FUEL CELL COMPRISING THE SAME, AND METHOD FOR PREPARING THE ELECTRODE}

1A is a cross-sectional view schematically showing an electrode substrate before depositing a catalyst.

1B is a schematic cross-sectional view of an electrode for a fuel cell of the present invention on which a catalyst is deposited.

2 is a cross-sectional view schematically showing a membrane-electrode assembly including an electrode for a fuel cell of the present invention.

3 is an exploded perspective view schematically showing a fuel cell including the fuel cell electrode of the present invention.

4 is a graph showing the voltage and current generation efficiency of the fuel cell prepared according to Example 1 and Comparative Examples 1 to 3.

[Industrial use]

The present invention relates to a fuel cell electrode, a fuel cell including the same, and a method for manufacturing the electrode for a fuel cell, and more particularly, to a fuel cell electrode having a catalyst layer having a large surface area, a method for manufacturing a fuel cell and a fuel cell electrode including the same. It is about.

[Private Technology]

A fuel cell is a power generation system that directly converts the chemical reaction energy of hydrogen and oxygen contained in hydrocarbon-based materials such as methanol, ethanol and natural gas into electrical energy.

Fuel cells are classified into phosphoric acid fuel cells, molten carbonate fuel cells, solid oxide fuel cells, polymer electrolyte or alkaline fuel cells, etc., depending on the type of electrolyte used. Each of these fuel cells operates on essentially the same principle, but differs in the type of fuel used, operating temperature, catalyst, electrolyte, and the like.

Among these, the polymer electrolyte fuel cell (PEMFC), which is being developed recently, has superior output characteristics compared to other fuel cells, has a low operating temperature, fast start-up and response characteristics, and a mobile power source such as an automobile. Of course, it has a wide range of applications, such as distributed power supply for homes, public buildings and small power supply for electronic devices.

Such a PEMFC basically includes a stack, a reformer, a fuel tank, a fuel pump, and the like to constitute a system. The stack forms the body of the fuel cell, and the fuel pump supplies the fuel in the fuel tank to the reformer. The reformer reforms the fuel to generate hydrogen gas and supplies the hydrogen gas to the stack. Therefore, the PEMFC supplies fuel in the fuel tank to the reformer by operation of a fuel pump, reforming the fuel in the reformer to generate hydrogen gas, and electrochemically reacting the hydrogen gas and oxygen in the stack to produce electrical energy. Generate.

On the other hand, the fuel cell may employ a direct methanol fuel cell (DMFC) method that can supply a liquid methanol fuel directly to the stack. Such a direct methanol fuel cell fuel cell, unlike the polymer electrolyte fuel cell, the reformer is excluded.

In such a fuel cell system, a stack that substantially generates electricity includes several unit cells consisting of a membrane-electrode assembly (MEA) and a separator (or bipolar plate). It has a structure laminated to several tens. The membrane-electrode assembly has a structure in which an anode electrode (also called "fuel electrode" or "oxide electrode") and a cathode electrode (also called "air electrode" or "reduction electrode") are bonded to each other with a polymer electrolyte membrane interposed therebetween. Have

The separator serves as a passage for supplying fuel required for the reaction of the fuel cell to the anode electrode and for supplying oxygen to the cathode electrode and as a conductor for connecting the anode electrode and the cathode electrode in series in each membrane / electrode assembly. At the same time. In this process, the electrochemical oxidation of the fuel occurs at the anode, the electrochemical reduction of oxygen occurs at the cathode, and electricity, heat, and water can be obtained together due to the movement of electrons.

The anode electrode or cathode electrode typically comprises a platinum (Pt) catalyst. However, since platinum is an expensive precious metal, there is a problem that it cannot be used in large quantities, and conventionally, platinum is mainly used to support platinum to reduce the amount of platinum used.

However, when the platinum catalyst supported on carbon is used, the thickness of the catalyst layer becomes thick, there is a limit in the storage amount of platinum, and the contact state between the catalyst layer and the electrolyte membrane is not good, thereby degrading the performance of the fuel cell.

Therefore, there is a need to develop a membrane-electrode assembly that can exhibit excellent battery performance while reducing the amount of catalyst contained in the catalyst layer of the membrane-electrode assembly.

The present invention is to solve the above problems, it is an object of the present invention to provide a fuel cell electrode having a wide surface area of the catalyst.

Another object of the present invention is to provide a fuel cell including the electrode for the fuel cell.

Still another object of the present invention is to provide a method of manufacturing the fuel cell electrode.

The present invention provides an electrode for a fuel cell comprising an electrode substrate, and a catalyst layer comprising a nanocarbon layer formed on the surface of the electrode substrate and a catalyst deposited on the nanocarbon layer.

The present invention also provides a fuel comprising a membrane-electrode assembly including a polymer electrolyte membrane and the fuel cell electrode disposed on both sides of the polymer electrolyte membrane, and a bipolar plate disposed on both sides of the membrane-electrode assembly. Provide a battery.

The present invention also comprises the steps of wet coating the nanocarbon on the surface of the electrode substrate to form a nanocarbon layer; And forming a catalyst layer by depositing and coating a catalyst on the nanocarbon layer.

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

Expensive precious metals are mostly used as metal catalysts for membrane-electrode assemblies in fuel cells, and platinum is the most widely used among them. Therefore, it can be said that the biggest problem is to maintain the performance of the fuel cell while reducing the amount of the catalyst used.

As a method of reducing the amount of the catalyst used, there is a deposition method in which a catalyst layer is formed by depositing a catalyst on a substrate. However, the surface area of the catalyst layer is determined according to the surface area of the substrate on which the catalyst is deposited, and when the surface area of the catalyst layer is low, the output characteristics of the fuel cell are lowered. Therefore, it is important to widen the surface area of the substrate on which the catalyst is deposited.

The electrode for a fuel cell of the present invention is to deposit a catalyst after maximizing the surface area of the electrode substrate, and has a feature that the thickness of the catalyst layer is thin and the surface area is wide.

FIG. 1A is a cross-sectional view schematically showing an electrode substrate having a maximum surface area, and FIG. 1B is a schematic cross-sectional view of an electrode for a fuel cell of the present invention in which a catalyst is deposited on a surface of the electrode substrate.

Referring to FIGS. 1A and 1B, an electrode 100 for a fuel cell of the present invention includes an electrode substrate 101, a nanocarbon layer 102 formed on a surface of the electrode substrate 101, and a catalyst coated on the nanocarbon layer by deposition. And a catalyst layer 105 comprising (103).

The electrode base 101 serves as a support for supporting the electrode 100 and at the same time serves as a passage for delivering fuel and oxygen gas to the catalyst 105, and is made of carbon paper or carbon cloth. cloth). The electrode base made of carbon paper or carbon cloth is commonly referred to as a gas diffusion layer (GDL).

In addition, the electrode substrate 101 may include a gas diffusion layer selected from carbon paper or carbon cloth, and a micro porous layer (MPL). The microporous layer serves to help the catalyst and gas contact by spreading the fuel and oxygen gas evenly delivered through the gas diffusion layer, it is preferable that the microporous carbon layer, graphite, fullerene (C60), More preferably, it contains 1 or more types chosen from activated carbon or carbon black.

The gas diffusion layer (GDL) of the electrode base material preferably has a thickness of 10 to 1000 μm, and the microporous layer preferably has a thickness of 1 to 100 μm. If the thickness of the gas diffusion layer is less than 10 ㎛ can not serve as a support, if it exceeds 1000 ㎛ supply of fuel and oxygen gas is not smooth. In addition, when the thickness of the microporous layer is less than 1 μm, uniform diffusion of fuel and gas diffusion and uniform contact with the catalyst layer are difficult, and when it exceeds 100 μm, supply of fuel and oxygen gas is not smooth. .

The nanocarbon layer formed on the electrode substrate preferably has a thickness of 0.05 to 10 ㎛. When the thickness of the nanocarbon layer is less than 0.05 μm, the effect of surface area increase is insignificant, and when the thickness of the nanocarbon layer is more than 10 μm, no further surface area increase effect is obtained, and the electrode is thickened, which is not preferable.

The nanocarbons included in the nanocarbon layer may include carbon nanotubes (CNT), carbon nanofibers, carbon nanowires, carbon nanohorns, or carbon nanorings. nano ring) is preferably one or more selected.

In addition, the nanocarbon preferably has a diameter of 1 to 500 nm, and preferably has a length of 50 to 5000 nm. The smaller the diameter of the nanocarbon, the better, but nanocarbon having a diameter of less than 1 nm has difficulty in manufacturing, and when the diameter exceeds 500 nm, the effect of increasing the surface area is small. In addition, when the length of the nanocarbon is less than 50 nm, the porosity is reduced due to the dense arrangement of the nanocarbon, and it is difficult to supply fuel, and when it exceeds 500 nm, it is difficult to disperse the nanocarbon during slurry production. Occurs.

The content of the catalyst included in the catalyst layer is preferably 0.001 to 0.5 mg / cm ² per unit area, more preferably 0.01 to 0.05 mg / cm ² . When the content of the catalyst included in the catalyst layer is less than 0.001 mg / cm ^2, the efficiency of the fuel cell is not sufficient, and when the content of the catalyst is more than 0.5 mg / cm ² may be reduced the utilization of the catalyst.

In addition, the specific surface area per unit weight of the catalyst included in the catalyst layer is preferably 10 to 500 m ² / g. Since the oxidation / source reaction of the fuel cell occurs on the surface of the catalyst, the greater the specific surface area per unit weight, the better the fuel cell efficiency. Therefore, when the specific surface area per unit weight of the catalyst is less than 10 m ² / g, the efficiency of the fuel cell is lowered, and when it exceeds 500 m ² / g there is a manufacturing difficulty.

The catalyst layer is platinum, ruthenium, osmium, platinum-ruthenium alloy, platinum-osmium alloy, platinum-palladium alloy or platinum-M alloy (M = Ga, Ti, V, Cr, Mn, Fe, Co, Ni, Cu and Zn At least one catalyst selected from the group consisting of: platinum, ruthenium, osmium, platinum-ruthenium alloy, platinum-osmium alloy, platinum-palladium alloy, platinum-cobalt More preferably it comprises at least one catalyst selected from alloys or platinum-nickel.

The fuel cell electrodes are disposed on both sides of the polymer electrolyte membrane to form a membrane-electrode assembly.

2 is a cross-sectional view schematically showing the membrane-electrode assembly including the fuel cell electrode of the present invention. Referring to FIG. 2, the membrane-electrode assembly 10 including the fuel cell electrode of the present invention includes the polymer electrolyte membrane 110 and the fuel cell electrode 100 disposed on both surfaces of the polymer electrolyte membrane 110, respectively. 100 '). The fuel cell electrode includes electrode bases 101 and 101 'and catalyst layers 105 and 105'.

 In the membrane-electrode assembly 10, the electrode 100 disposed on one surface of the polymer electrolyte membrane 110 is called an anode electrode (or a cathode electrode), and the electrode 100 ′ disposed on the other surface is called a cathode electrode ( Or anode electrode). The anode electrode generates an oxidation reaction that separates hydrogen ions and electrons from the fuel, and the polymer electrolyte membrane moves the hydrogen ions generated from the anode electrode to the cathode electrode, and the cathode electrode is supplied from the hydrogen ion supplied from the polymer electrolyte membrane and from the outside. It causes a reduction reaction to produce water from the oxygen gas.

Accordingly, the polymer electrolyte membrane 110 includes a polymer having excellent hydrogen ion conductivity, and preferably a perfluor-based polymer, a benzimidazole-based polymer, a polyimide-based polymer, a polyetherimide-based polymer, and a polyphenylene sulfide-based polymer. Polymer polysulfone polymer, polyether sulfone polymer, polyether ketone polymer polyether-ether ketone polymer or polyphenylquinoxaline-based polymer may include at least one hydrogen ion conductive polymer selected, more preferably Is a poly (perfluorosulfonic acid), poly (perfluorocarboxylic acid), copolymer of tetrafluoroethylene and fluorovinyl ether containing sulfonic acid groups, defluorinated sulfide polyether ketones, aryl ketones, poly (2 , 2 '-(m-phenylene) -5,5'-bibenzimidazole) (poly (2,2'-(m-phenylene) -5,5'-bibenzimidazole)) or poly (2,5- Benzimidazole) At least one member selected document may comprise a hydrogen-ion conductive polymer.

The membrane-electrode assembly may exhibit excellent performance due to the large surface area of the catalyst.

3 is an exploded perspective view schematically showing the fuel cell of the present invention. Referring to FIG. 3, the fuel cell 1 of the present invention includes a membrane-electrode assembly 10 including the fuel cell electrode and a bipolar plate 20 disposed on both sides of the membrane-electrode assembly. Include.

Method of manufacturing an electrode for a fuel cell of the present invention comprises the steps of: wet coating the nanocarbon on the surface of the electrode substrate to form a nanocarbon layer; And depositing and coating a catalyst on the nanocarbon layer to form a catalyst layer.

The electrode substrate may be a gas diffusion layer (GDL) selected from carbon paper or carbon cloth, and, if necessary, a microporous layer formed on the surface of the gas diffusion layer. It may be used to further include a porous layer (MPL).

Preferably, the gas diffusion layer (GDL) has a thickness of 10 to 1000 μm, and the microporous layer has a thickness of 1 to 100 μm.

In addition, the microporous layer is preferably a microporous carbon layer in which the micropore layer is formed, more preferably at least one selected from graphite, fullerene (C60), activated carbon, or carbon black.

The nanocarbon layer is coated on the surface of the electrode substrate by using a wet coating method, and the cross section of the electrode substrate on which the nanocarbon layer is applied is similar to that of FIG. 1A. Examples of the wet coating method include a slurry method, a screen printing method, a doctor blade method, or a spray coating method, in which nanocarbon is mixed with an organic solvent and a binder and applied to a substrate. However, the method of forming the nanocarbon layer of the present invention is not limited to the above method.

Since the wet coating method is generally well known, a detailed description thereof will be omitted. However, it is preferable to use a hydrogen ion conductive polymer as the binder, and a more preferable example of the hydrogen ion conductive polymer is the same as the example of the hydrogen ion conductive polymer used in the polymer electrolyte membrane. In addition to the hydrogen ion conductive polymer, a conventional binder such as polytetrafluoroethylene, polyvinylidene fluoride, polyvinyl alcohol, polyvinyl chloride, polystyrene-butadiene copolymer or cellulose may be used. However, the type of binder used in the wet coating method of the present invention is not limited only to the above examples.

The solvent used in the wet coating method is not particularly limited, and preferably, alcohols such as water and methanol ethanol isopropyl alcohol, aromatic alcohols such as tapinol, ethers, ketones, benzenes, amides or esters, etc. The solvent of can be used.

The nanocarbon layer is preferably formed to a thickness of 0.05 to 10 ㎛.

The nanocarbons included in the nanocarbon layer may include carbon nanotubes (CNT), carbon nanofibers, carbon nanowires, carbon nanohorns, or carbon nanorings. nano ring) is preferably one or more selected.

It is preferable that the nanocarbon has a diameter of 1 to 500 nm, and further preferably has a length of 50 to 5000 nm.

The catalyst layer is formed by depositing and coating a catalyst on the nanocarbon layer of the electrode substrate prepared by the above method. The content of the catalyst included in the catalyst layer is preferably 0.001 to 0.5 mg / cm ² per unit area, more preferably 0.01 to 0.05 mg / cm ² . In addition, the specific surface area per unit weight of the catalyst contained in the catalyst layer is preferably 10 to 500 m ² / g.

In this case, the catalyst layer may be formed using a conventional deposition method, and preferably, sputtering, physical vapor deposition (PVD), thermal chemical vapor deposition (Thermal CVD), plasma enhanced chemical vapor deposition (Plasma Enhanced CVD); PECVD), a thermal evaporation method, an electrochemical depostion or an e-beam evaporation method and the like can be used. However, the deposition method is not limited to the above method, and if necessary, two or more of the above methods may be mixed and used.

The catalyst layer is platinum, ruthenium, osmium, platinum-ruthenium alloy, platinum-osmium alloy, platinum-palladium alloy or platinum-M alloy (M = Ga, Ti, V, Cr, Mn, Fe, Co, Ni, Cu and Zn At least one catalyst selected from the group consisting of: platinum, ruthenium, osmium, platinum-ruthenium alloy, platinum-osmium alloy, platinum-palladium alloy, platinum-cobalt More preferably it comprises at least one catalyst selected from alloys or platinum-nickel.

A membrane-electrode assembly can be manufactured by arranging the fuel cell electrodes produced by the above method on both sides of the polymer electrolyte and bonding them.

As the polymer electrolyte membrane used in the preparation of the membrane-electrode assembly, a polymer electrolyte membrane having hydrogen ion conductivity may be used. Preferably, a perfluoro polymer, a benzimidazole polymer, a polyimide polymer, a polyetherimide polymer , Polyphenylene sulfide polymer, polysulfone polymer, polyether sulfone polymer, polyether ketone polymer, polyether ether ketone polymer or polyphenylquinoxaline polymer containing at least one hydrogen ion conductive polymer selected from It may be used, more preferably poly (perfluorosulfonic acid), poly (perfluorocarboxylic acid), copolymer of tetrafluoroethylene and fluorovinyl ether containing sulfonic acid group, defluorinated sulfide polyether Ketones, aryl ketones, poly (2,2 '-(m-phenylene) -5,5'-bibenzimidazole) (poly (2,2'-(m-ph enylene) -5,5'-bibenzimidazole)) or poly (2,5-benzimidazole) may be used including one or more hydrogen ion conductive polymers.

Hereinafter, preferred embodiments of the present invention are described. However, the following examples are only preferred embodiments of the present invention, and the present invention is not limited to the following examples.

EXAMPLE

Example 1

A carbon nanotube slurry was prepared by mixing a carbon nanotube (CNT) having an average diameter of 30 nm and an average length of 1000 nm to a poly (perfluoro sulfonic acid) solution (Nafion ^™ solution of DuPont).

Prepare an electrode substrate having an active carbon layer having a thickness of 20 µm on a surface of a carbon cloth having a thickness of 280 µm, apply the prepared carbon nanotube slurry to the surface of the activated carbon layer of the electrode substrate, and dry it. To form a nanocarbon layer.

A fuel cell electrode was prepared by sputtering deposition of 0.05 mg / cm ² platinum per unit area on the surface of the nanocarbon layer of the electrode substrate.

A membrane-electrode assembly was prepared by arranging the fuel cell electrodes on both sides of a poly (perfluorosulfonic acid) membrane (Nafion ^™ manufactured by DuPont) and bonding them.

A fuel cell was manufactured by disposing a separator plate on both sides of the prepared membrane-electrode assembly.

Comparative Example 1

A fuel cell was manufactured in the same manner as in Example 1, except that an electrode for a fuel cell was manufactured by sputtering evaporation of 0.05 mg / cm ² of platinum per unit area on a surface of a carbon cloth having a thickness of 280 μm.

Comparative Example 2

A fuel cell electrode was fabricated by sputtering deposition of 0.05 mg / cm ² platinum per unit area on the surface of an activated carbon layer of an electrode substrate having an activated carbon layer having a thickness of 20 μm formed on a surface of a carbon cloth having a thickness of 280 μm. Except for producing a fuel cell in the same manner as in Example 1.

Comparative Example 3

3 g of a platinum catalyst (platinum content 20 wt%) supported on carbon and 1 g of a poly (perfluorosulfonic acid) solution (Nafion ^TM solution manufactured by DuPont) were mixed to prepare a slurry, and the prepared slurry was 280 μm thick. A fuel cell was fabricated in the same manner as in Example 1 except that the electrode for fuel cell was applied to the surface of the activated carbon layer of the electrode substrate including a carbon cloth and an activated carbon layer having a thickness of 20 μm, followed by drying. Was prepared. At this time, the content of the platinum catalyst contained in the catalyst layer was 0.4 mg / cm ² per unit area.

For fuel cells manufactured according to Example 1 and Comparative Examples 1 to 3, voltage and current generation efficiency were measured, and the results are shown in FIG. 4.

As shown in FIG. 4, the fuel cell manufactured according to Example 1 of the present invention shows excellent performance even with only one eighth of the amount of the catalyst included in the fuel cell prepared according to Comparative Example 3. It can be seen that it does not contain and exhibits better performance than the fuel cells of Comparative Examples 1 and 2 in which the catalyst is deposited.

The electrode for a fuel cell of the present invention has an advantage that the surface area of the catalyst is large and the performance of the fuel cell can be improved while using a small amount of the catalyst.

Claims (25)

Electrode base material, and Catalyst layer comprising a nanocarbon layer formed on the surface of the electrode substrate and the catalyst deposited on the nanocarbon layer Fuel cell electrode comprising a. The electrode of claim 1, wherein the electrode substrate is a gas diffusion layer (GDL) selected from carbon paper or carbon cloth. The electrode of claim 2, wherein the gas diffusion layer has a thickness of about 10 μm to about 1000 μm. The fuel cell of claim 1, wherein the electrode substrate comprises a gas diffusion layer selected from carbon paper or carbon cloth and a micro porous layer (MPL) formed on the gas diffusion layer. electrode. The electrode of claim 4, wherein the gas diffusion layer (GDL) has a thickness of 10 to 1000 μm, and the microporous layer has a thickness of 1 to 100 μm. The electrode for a fuel cell of claim 4, wherein the microporous layer comprises at least one selected from the group consisting of graphite, fullerene (C60), activated carbon, and carbon black. The electrode of claim 1, wherein the nanocarbon layer has a thickness of 0.05 to 10 μm. According to claim 1, wherein the nano carbon layer is carbon nanotubes (CNT), carbon nano fiber (carbon nano fiber), carbon nano wire (carbon nano wire), carbon nano horn (carbon nano horn), and carbon nano ring ( Carbon nano ring) is a fuel cell electrode comprising one or more types of nanocarbon selected from the group consisting of. The electrode of claim 1, wherein the nanocarbon has a diameter of 1 to 500 nm. The fuel cell electrode of claim 1, wherein the nanocarbon has a length of 50 to 5000 nm. The fuel cell electrode of claim 1, wherein a content of the catalyst included in the catalyst layer is 0.001 to 0.5 mg / cm ² per unit area. The electrode of claim 1, wherein a specific surface area per unit weight of the catalyst included in the catalyst layer is 10 to 500 m ² / g. The method of claim 1, wherein the catalyst layer is platinum, ruthenium, osmium, platinum-ruthenium alloy, platinum-osmium alloy, platinum-palladium alloy and platinum-M alloy (M = Ga, Ti, V, Cr, Mn, Fe, Co) And at least one catalyst selected from the group consisting of at least one transition metal selected from the group consisting of Ni, Cu, and Zn. A membrane-electrode assembly comprising a polymer electrolyte membrane and an electrode for a fuel cell of any one of claims 1 to 13 disposed on both surfaces of the polymer electrolyte membrane, and Bipolar plates disposed on both sides of the membrane-electrode assembly Fuel cell comprising a. 15. The method of claim 14, wherein the polymer electrolyte membrane is perfluoro-based polymer, benzimidazole-based polymer, polyimide-based polymer, polyetherimide-based polymer, polyphenylene sulfide-based polymer polysulfone-based polymer, polyether sulfone-based polymer, poly A fuel cell comprising at least one hydrogen ion conductive polymer selected from the group consisting of an ether ketone polymer, a polyether-ether ketone polymer, and a polyphenylquinoxaline polymer. 15. The method of claim 14, wherein the polymer electrolyte membrane is a poly (perfluorosulfonic acid), poly (perfluorocarboxylic acid), a copolymer of tetrafluoroethylene and fluorovinyl ether containing a sulfonic acid group, defluorinated sulfide poly Ether ketone, aryl ketone, poly (2,2 '-(m-phenylene) -5,5'-bibenzimidazole) (poly (2,2'-(m-phenylene) -5,5'-bibenzimidazole )) And at least one hydrogen ion conductive polymer selected from the group consisting of poly (2,5-benzimidazole). Forming a nanocarbon layer by wet coating nanocarbon on the surface of the electrode substrate; And Depositing and coating a catalyst on the nanocarbon layer to form a catalyst layer Method for producing an electrode for a fuel cell comprising a. 18. The method of claim 17, wherein the electrode base material is a gas diffusion layer (GDL) selected from carbon paper or carbon cloth. 18. The method of claim 17, wherein the electrode substrate comprises a gas diffusion layer selected from carbon paper or carbon cloth and a micro porous layer (MPL) formed on the gas diffusion layer. Method of manufacturing the electrode. 20. The method of claim 19, wherein the microporous layer comprises at least one selected from the group consisting of graphite, fullerene (C60), activated carbon, and carbon black. The method of claim 17, wherein the nanocarbon layer is formed to a thickness of 0.05 to 10 μm. The method of claim 17, wherein the nano carbon layer is carbon nanotubes (CNT), carbon nano fibers (carbon nano fiber), carbon nano wire (carbon nano wire), carbon nano horn (carbon nano horn), and carbon nano ring ( Carbon nano ring) is a method for producing an electrode for a fuel cell comprising at least one nanocarbon selected from the group consisting of. The method of claim 17, wherein the content of the catalyst included in the catalyst layer is 0.001 to 0.5 mg / cm ² per unit area. 18. The method of claim 17, wherein the catalyst layer is sputtering, physical vapor deposition (PVD), thermal chemical vapor deposition (Thermal CVD), plasma enhanced CVD (PECVD), thermal evaporation, electrochemical vapor deposition ( A method of manufacturing an electrode for a fuel cell, which is deposited by at least one deposition method selected from the group consisting of electrochemical depostion and e-beam evaporation. 18. The method of claim 17, wherein the catalyst layer is platinum, ruthenium, osmium, platinum-ruthenium alloy, platinum-osmium alloy, platinum-palladium alloy or platinum-M alloy (M = Ga, Ti, V, Cr, Mn, Fe, Co) And at least one catalyst selected from the group consisting of Ni, Cu, and Zn).

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