Apparatus for manufacturing electrode for fuel cell using soundwave, and manufacturing method of electrode for fuel cell, and manufacturing method of membrane-electrode-assembly for fuel cell

Abstract

The present invention relates to an apparatus for manufacturing an electrode for a fuel cell using sound waves, a method for manufacturing an electrode for a fuel cell, and a method for manufacturing a membrane-electrode assembly for a fuel cell. More specifically, it is possible to suppress phase separation of a slurry using sound waves and improve the performance and durability of a fuel cell.

Description

Technology Field

[0001] The present invention relates to an electrode manufacturing apparatus for a fuel cell using sound waves, a method for manufacturing an electrode for a fuel cell, and a method for manufacturing a membrane-electrode assembly for a fuel cell, and more specifically, to an electrode manufacturing apparatus capable of suppressing phase separation of a slurry using sound waves. Background Technology

[0002] A fuel cell is a device that generates electrical energy by electrochemically reacting a fuel and an oxidant. The reaction for electricity generation in a fuel cell takes place in a Membrane-Electrode Assembly (MEA), which consists of a proton-conducting electrolyte membrane and anode and cathode electrodes. Specifically, hydrogen supplied to the anode, the oxidation electrode of the fuel cell, is separated into hydrogen ions (protons) and electrons. The hydrogen ions then move through the membrane toward the cathode, the reduction electrode, while the electrons move toward the cathode through an external circuit. Subsequently, at the cathode, oxygen molecules, hydrogen ions, and electrons react together to generate electricity and heat, while water (H2O) is produced as a reaction byproduct.

[0003] These fuel cell electrodes include a catalyst and an ionomer, and are generally manufactured by applying an electrode slurry in which the catalyst and ionomer are dispersed in a solvent onto a release liner and then drying it.

[0004] However, during the drying process while manufacturing the electrode, problems arise where the catalyst and ionomer exhibit different precipitation behaviors due to differences in particle size within the slurry or undergo phase separation due to insufficient dispersibility, contrary to the design intent. Many methods have been devised to solve this phase separation, for example, by adding a phase separation inhibitor to the electrode slurry to manufacture the electrode.

[0005] In this case, the aforementioned phase separation inhibitor helps improve fuel cell performance and durability, but it can degrade performance by poisoning the surface of the metal catalyst and may also hinder mass transfer (oxygen, water) by being located in the pores within the porous electrode. The problem to be solved

[0006] The present invention aims to solve these problems by providing an apparatus and method for manufacturing a fuel cell electrode in which phase separation of materials in the slurry does not occur during the process of manufacturing a fuel cell electrode by a roll-to-roll process.

[0007] In addition, we aim to provide an apparatus and method for manufacturing an electrode for a fuel cell in which phase separation does not occur even without using a separate additive to suppress phase separation of the material in the above slurry.

[0008] The objectives of the present invention are not limited to those mentioned above. The objectives of the present invention will become more apparent from the following description and will be realized by the means and combinations thereof described in the claims. means of solving the problem

[0009] According to one aspect of the present invention, a fuel cell electrode manufacturing apparatus may be provided, comprising: a conveying unit including a first roller and a second roller for continuously conveying a substrate in one direction; a supply unit including a coater for applying a slurry onto the substrate; a drying unit located downstream of the supply unit and including a dryer for removing a solvent in the slurry; and a dispersion unit located on the side of the substrate coated with the slurry and including a sound wave disperser for applying sound waves to the slurry.

[0010] In one embodiment, the sound wave disperser may be positioned between the point where the slurry is applied on the substrate and the point where the slurry applied on the substrate passing through the drying section is dried by 80%.

[0011] In one embodiment, the sound wave disperser includes a first sound wave disperser located on one side of the substrate and a second sound wave disperser located on the other side, and the first sound wave disperser and the second sound wave disperser may be provided at corresponding positions.

[0012] In one embodiment, the sound wave disperser may be provided to be spaced apart from the side of the substrate coated with the slurry by a predetermined distance.

[0013] In one embodiment, the dispersion unit may include at least two or more sound wave dispersers along the direction in which the substrate coated with the slurry moves.

[0014] In one embodiment, the plurality of sound wave dispersers may be arranged to be spaced apart from each other.

[0015] In addition, the spacing between the plurality of sound wave dispersers may be 10 cm to 50 cm.

[0016] In one embodiment, the plurality of sound wave dispersers may be arranged such that the wavelength of the sound wave decreases as it moves downstream relative to the direction in which the substrate coated with the slurry moves.

[0017] In one embodiment, the plurality of sound wave dispersers may be arranged so that the wavelength of the sound wave decreases by 20% as it moves downstream.

[0018] In one embodiment, the sound wave disperser has a size of 1 cm to 15 cm based on the conveying direction of the substrate, and may have a size greater than the thickness of the slurry based on the stacking direction of the slurry applied on the substrate.

[0019] In one embodiment, the wavelength of the sound wave applied to the slurry is 20 Hz to 1 x 10⁻⁶ 6 It can be Hz.

[0020] According to another aspect of the present invention, a method for manufacturing an electrode for a fuel cell can be provided, comprising applying a slurry onto a substrate moving in a roll-to-roll manner, applying sound waves to the slurry applied onto the substrate, and drying the slurry.

[0021] In one embodiment, the slurry may include a solvent, a catalyst, and an ionomer. Additionally, the slurry may not include an additive for suppressing phase separation.

[0022] In one embodiment, the average particle size of the mixture containing the catalyst and the ionomer may be 50 nm to 50 μm.

[0023] In one embodiment, the catalyst may include a support and a catalyst metal supported on the support.

[0024] In one embodiment, the sound wave may be applied between the point where the slurry is applied on the substrate and the point where the slurry applied on the substrate is dried to 80%.

[0025] In one embodiment, the wavelength of the sound wave may decrease as it moves downstream relative to the direction in which the substrate coated with the slurry moves.

[0026] In one embodiment, the electrode for the fuel cell may include at least one of an anode or a cathode.

[0027] According to another aspect of the present invention, a method for manufacturing a membrane-electrode assembly for a fuel cell is provided, comprising manufacturing an electrode for a fuel cell according to the above manufacturing method, and stacking a proton-conducting electrolyte membrane and the electrode for a fuel cell and passing them between a pair of rolling rolls. Effects of the invention

[0028] According to the present invention, an apparatus and method for manufacturing a fuel cell electrode can be provided in which phase separation of a material in a slurry does not occur during the process of manufacturing a fuel cell electrode by a roll-to-roll process.

[0029] In addition, a manufacturing apparatus and method for a fuel cell electrode that does not cause phase separation even without using a separate additive to suppress phase separation of the material in the above slurry.

[0030] The effects of the present invention are not limited to those mentioned above. It should be understood that the effects of the present invention include all effects that can be inferred from the following description. Brief explanation of the drawing

[0031] FIG. 1 schematically shows a side view of an electrode manufacturing apparatus for a fuel cell according to one embodiment of the present invention. Figure 2 schematically shows a top view of a fuel cell electrode manufacturing apparatus according to Figure 1. FIG. 3 shows a sound wave disperser according to one embodiment of the present invention. Figure 4 illustrates a mixture of catalyst and ionomer included in the slurry of the present invention. FIG. 5 illustrates a method for manufacturing a membrane-electrode assembly for a fuel cell according to an embodiment of the present invention. Specific details for implementing the invention

[0032] The above objects, other objects, features, and advantages of the present invention will be easily understood through the following preferred embodiments associated with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed content is thorough and complete and to ensure that the spirit of the invention is sufficiently conveyed to a person skilled in the art.

[0033] In describing each drawing, similar reference numerals have been used for similar components. In the attached drawings, the dimensions of the structures are depicted enlarged from their actual size for clarity of the invention. Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the invention, the first component may be named the second component, and similarly, the second component may be named the first component. A singular expression includes a plural expression unless the context clearly indicates otherwise.

[0034] In this specification, terms such as "comprising" or "having" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Furthermore, when a part such as a layer, film, region, or plate is described as being "on" another part, this includes not only the case where it is "immediately above" the other part, but also the case where there is another part in between. Conversely, when a part such as a layer, film, region, or plate is described as being "below" another part, this includes not only the case where it is "immediately below" the other part, but also the case where there is another part in between.

[0035] Unless otherwise specified, all numbers, values, and / or expressions used herein to represent amounts of ingredients, reaction conditions, polymer compositions, and formulations should be understood to be modified by the term "approximately" in all cases, as these numbers are essentially approximations reflecting the various uncertainties of measurement that occur in obtaining these values ​​among other things. Furthermore, where numerical ranges are disclosed herein, such ranges are continuous and, unless otherwise indicated, include all values ​​from the minimum value of such range to the maximum value. Moreover, where such ranges refer to integers, they include all integers from the minimum value to the maximum value, unless otherwise indicated.

[0036] In addition, unless specifically stated or evident, the term “about” as used herein may be understood within the range of tolerances customary in the art (e.g., within 2 standard deviations of the mean). “about” may be understood as within 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3%, 2%, 1%, 0.5%, 0.1%, 0.05%, or 0.01% of the specified value.

[0037] In this specification, where a range is described for a variable, it will be understood that the variable includes all values ​​within the described range, including the described endpoints of the range. For example, the range “5 to 10” will be understood to include not only the values ​​5, 6, 7, 8, 9, and 10, but also any sub-ranges such as 6 to 10, 7 to 10, 6 to 9, 7 to 9, etc., and any values ​​between integers valid for the category of the described range, such as 5.5, 6.5, 7.5, 5.5 to 8.5, and 6.5 to 9. Also, for example, the range “10% to 30%” will be understood to include all integers including values ​​such as 10%, 11%, 12%, 13%, etc. and up to 30%, as well as any sub-range such as 10% to 15%, 12% to 18%, 20% to 30%, etc., and any value between valid integers within the stated range category such as 10.5%, 15.5%, 25.5%, etc.

[0038] Furthermore, as used herein, the terms “vehicle,” “automobile,” or other similar terms are understood to include general automobiles such as sports utility vehicles (SUVs), buses, trucks, and various commercial vehicles, as well as means of transportation such as trains, ships, and aircraft, and to include hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, hydrogen-powered vehicles, and other alternative fuel vehicles (e.g., fuels derived from resources other than petroleum). A hybrid vehicle as used herein refers to a vehicle equipped with two or more power sources (e.g., a gasoline-powered vehicle and an electric-powered vehicle).

[0039] Where a certain computational capability is required when performing any method or program in this specification, it may be understood that it is driven by a hardware device that includes memory and a processor and is specifically programmed to execute the method or program described in this specification. The memory is configured to store a module, and the processor is specifically configured to execute said module to perform one or more processes further described below.

[0040] Additionally, it may be implemented as a non-transient computer-readable medium containing executable program instructions executed by a processor, controller, etc. Examples of computer-readable media include, but are not limited to, ROM, RAM, Compact Disc (CD)-ROM, magnetic tape, floppy disk, flash drive, smart card, and optical data storage device. The computer-readable medium may also be distributed to computer systems connected to a network to be stored and executed in a distributed manner, such as a telematics server or a CAN (Controller Area Network).

[0042] FIG. 1 shows a side view of a fuel cell electrode manufacturing apparatus according to one embodiment of the present invention, and FIG. 2 shows a top view of the fuel cell electrode manufacturing apparatus.

[0043] Referring to FIGS. 1 and 2, the electrode manufacturing device for a fuel cell may include a conveying unit comprising a first roller (110) and a second roller (120) that continuously convey a substrate (SS) in one direction (x); a supply unit comprising a coater (200) that applies a slurry (SR) onto the substrate; a drying unit comprising a dryer (300) located downstream of the supply unit and removing a solvent in the slurry; and a dispersion unit comprising a sound wave disperser (400) located on the side of the substrate coated with the slurry and applying sound waves to the slurry.

[0044] Below, each component is explained in more detail.

[0045] The above-described conveying unit includes a first roller (110) and a second roller (120), which are cylindrical rollers arranged to be rotatable with a predetermined diameter to convey a substrate in a roll-to-roll manner. The substrate may be provided to an electrode manufacturing device with one end wound on the first roller (110) and the other end wound on the second roller (120), and the substrate may be conveyed in one direction (x) as the first roller (110) and the second roller (120) rotate.

[0046] Additionally, the above-mentioned conveying unit may further include an auxiliary roller to maintain the tension of the above-mentioned material or to guide the conveying direction (x) as needed.

[0047] Here, the substrate is coated with a slurry on one surface thereof and serves to support the substrate coated with the slurry while it is transported and dried. It can be used without particular limitation as long as it facilitates easy separation between the substrate and the electrode after the fuel cell electrode is manufactured. For example, the substrate may be a release liner, such as a non-porous release liner containing a polymer compound such as PEN (Polyethylene Naphthalate). Additionally, when the slurry is applied directly to the electrolyte membrane (M), the substrate may include the electrolyte membrane.

[0048] The above supply unit may include a coater (200) to apply a slurry onto a substrate transferred from the first roller (110). The coater (200) is not particularly limited as long as it can uniformly apply the slurry onto the substrate, and for example, a slot die coater, a lip coater, a comma roll, or a doctor blade may be used. Among these, preferably, a slot die coater may be used, which enables thin film coating and mass production by spraying the slurry onto the substrate at a constant pressure.

[0049] Since the slurry applied on the above substrate contains a solvent, a catalyst, and an ionomer, etc., a process of drying the solvent may be required to manufacture an electrode for a fuel cell from the slurry.

[0050] To this end, the electrode manufacturing apparatus for a fuel cell according to the present invention includes a drying unit located downstream of the supply unit. The drying unit includes a dryer (300) for removing a solvent in the slurry, and the type and number of the dryer (300) can be used without special limitation as long as it is for removing a solvent in the slurry. For example, an infrared heater, a dry oven filled with inert gas, a vacuum oven, etc., can be used as the dryer (300).

[0051] For reference, in this specification, any configuration being located "downstream" of another configuration can be understood as the substrate or the substrate coated with the slurry passing through the other configuration first and then passing through the arbitrary configuration.

[0052] Meanwhile, the slurry applied to the above substrate is intended for manufacturing an electrode applied to a fuel cell and may include a solvent, a catalyst, and an ionomer. If the slurry is dried in a drying section without any treatment while applied to the substrate, the catalyst and ionomer may exhibit different precipitation behaviors due to differences in particle size within the slurry, or problems may arise such as phase separation due to insufficient dispersibility.

[0053] The electrode manufacturing apparatus for a fuel cell according to the present invention may include a dispersion unit that prevents the phenomenon in which the catalyst, ionomer, and composites thereof within the slurry aggregate or precipitate and undergo phase separation by applying sound waves to the slurry through a sound wave disperser (400) installed on the side of the substrate coated with the slurry. Here, "side of the substrate coated with the slurry" can be understood to mean not only a surface that is in direct contact with both edge sides of the substrate coated with the slurry, but also an area spaced apart by a predetermined distance in the y-axis direction from both edge surfaces of the substrate coated with the slurry, as can be seen in FIG. 2.

[0054] In one embodiment, the sound wave disperser (400) includes a first sound wave dispersion unit (411, 421, 431 …) located on one side of the substrate and a second sound wave dispersion unit (412, 422, 432 …) located on the other side, and the first sound wave dispersion unit (411, 421, 431 …) and the second sound wave dispersion unit (412, 422, 432 …) may be provided at corresponding positions to each other.

[0055] FIG. 3 is a photograph of the sound wave disperser (400) used in the present invention. Referring to FIG. 3, the sound wave disperser includes a first sound wave dispersion unit and a second sound wave dispersion unit. When the first sound wave dispersion unit and the second sound wave dispersion unit generate sound waves of a predetermined frequency, the sound waves generated from the first sound wave dispersion unit and the sound waves generated from the second sound wave dispersion unit repeatedly cancel each other out and interfere, and the material located between them can float. If such first sound wave dispersion unit and second sound wave dispersion unit are installed on one side and the other side of the substrate coated with the slurry, the catalyst, ionomer, and their composites dispersed in the solvent of the slurry can maintain an evenly dispersed state without aggregating or precipitating and separating into phases.

[0056] Accordingly, the electrode manufacturing apparatus for a fuel cell according to the present invention can suppress phase separation without introducing an additive to suppress phase separation into the slurry, and prevent the additive from poisoning the surface of the metal catalyst to degrade performance and being located in the pore portion within the porous electrode to hinder mass transfer.

[0057] For reference, the fact that the first sound wave dispersion unit (411, 421, 431 …) and the second sound wave dispersion unit are provided at "corresponding positions" can be understood as meaning that when the first sound wave dispersion unit (411, 421, 431 …) and the second sound wave dispersion unit (412, 422, 432 …) installed on the side of the above-mentioned material are moved along a virtual axis direction (y), a certain area overlaps with each other.

[0058] In one embodiment, the acoustic disperser (400) may be positioned between the point where the slurry is applied to the substrate and the point where the slurry applied to the substrate passes through the drying section and is dried by 80%. As the slurry applied to the substrate passes through the drying section, the solvent evaporates, and the thickness may decrease accordingly. During this process, if the acoustic disperser (400) is continuously operated, there is a risk that catalysts, ionomers, etc. located near the surface in the stacking direction (z) of the slurry may escape the slurry and scatter in the form of powder. According to one embodiment of the present invention, the area where the acoustic disperser (400) can be installed is limited to the point where the slurry applied to the substrate is dried by 80%, thereby preventing catalysts, ionomers, and mixtures thereof from scattering to the outside in the form of powder. Preferably, it may be installed from immediately after the slurry is applied to the substrate until the point where the slurry applied to the substrate is dried by 80%.

[0059] The degree to which the slurry applied on the above substrate dries is not particularly limited to changes in thickness or weight of the slurry and may be measured by various methods.

[0060] In one embodiment, the dispersion unit may include at least two sound wave dispersers (400) along the direction (x) in which the substrate coated with the slurry moves. For reference, the fact that the dispersion unit includes two or more sound wave dispersers (400) is distinguished from the case where one sound wave disperser (400) includes a first sound wave dispersion unit (411, 421, 431 …) and a second sound wave dispersion unit (412, 422, 432 …). Although FIGS. 1 and 2 are illustrated as including three sound wave dispersers, it is understood that the number of sound wave dispersers can be increased or decreased as needed.

[0061] In one embodiment, the two or more sound wave dispersers (400) may be arranged to be spaced apart from each other. Additionally, the spacing distance (c) between the plurality of sound wave dispersers (400) may be 10 cm to 50 cm. Preferably, the spacing distance (c) may be about 20 cm.

[0062] If multiple sonic dispersers (410, 420, 430 …) are arranged at a certain distance apart, the catalyst, ionomer, and mixtures thereof can be prevented from scattering away from the slurry by allowing the catalyst, ionomer, and mixtures thereof to settle for a certain period of time as the slurry passes through a drying section to remove the solvent inside and reduce its thickness. If the distance apart is less than 10 cm, there is a possibility that the catalyst, ionomer, and mixtures thereof may scatter in the form of powder. In addition, if the distance apart is excessively long, phase separation of the slurry may occur.

[0063] In one embodiment, the wavelength of the sound wave applied to the slurry is 20 Hz to 1 x 10⁻⁶ 6 It may be in Hz. In addition, in one embodiment, the plurality of sound wave dispersers (410, 420, 430 …) may be arranged such that the wavelength of the sound wave decreases as it moves downstream relative to the direction (x) in which the substrate coated with the slurry moves. Specifically, the plurality of sound wave dispersers (410, 420, 430 …) may be arranged such that the wavelength of the sound wave decreases by 20% or less as it moves downstream, and preferably such that it decreases by about 20%. As the plurality of sound wave dispersers (410, 420, 430 …) are arranged such that the wavelength of the sound wave decreases as it moves downstream, the slurry coated on the substrate may be exposed to a discontinuous decrease in the wavelength of the sound wave.

[0064] For example, as shown in FIGS. 1 and 2, when the first sound wave disperser (410), the second sound wave disperser (420), and the third sound wave disperser (430) are installed at a predetermined distance apart, the wavelength of the sound wave generated by the first sound wave disperser (410) is the highest, and the wavelength of the sound wave may decrease as it goes toward the second sound wave disperser (420) and the third sound wave disperser (430). In addition, the decrease range is 20%, so for example, if the wavelength of the sound wave generated by the first sound wave disperser (410) is 1 MHz, the wavelength of the sound wave generated by the second sound wave disperser (420) may be 0.8 MHz, and the wavelength of the sound wave generated by the third sound wave disperser (430) may be 0.64 MHz.

[0065] In one embodiment, the shape of the sound wave disperser (400) is not particularly limited, and various shapes such as a circle, a square, and other polygons may be used. In addition, its size may not be particularly limited as long as it has a size of 1 cm to 15 cm based on the conveying direction (x) of the substrate and a size greater than the thickness of the slurry based on the stacking direction (z) of the slurry applied on the substrate.

[0066] For example, if the sound wave diffuser (400) is circular, its size may be a diameter of 1 cm to 15 cm based on one sound wave dispersion unit. Also, if the sound wave diffuser (400) is square, its size may be a width (x) of 1 cm to 15 cm based on one sound wave dispersion unit, and a height (z) greater than the thickness of the slurry.

[0067] According to another aspect of the present invention, a method for manufacturing an electrode for a fuel cell is provided, comprising applying a slurry onto a substrate that moves in a roll-to-roll manner, applying sound waves to the slurry applied to the substrate, and drying the slurry. For reference, moving the substrate in a roll-to-roll manner, applying a slurry onto the substrate, applying sound waves to the slurry applied to the substrate, and drying the slurry can be performed by an apparatus for manufacturing an electrode for a fuel cell according to various embodiments of the present invention.

[0068] In one embodiment, the average particle size of the mixture containing the catalyst and the ionomer may be 50 nm to 50 μm. Here, "mixture containing the catalyst and the ionomer" can be understood as forming a mixed particle phase in which an ionomer is positioned around at least one catalyst, as shown in FIG. 4. If the average particle size of the mixture exceeds 50 μm, it can be interpreted that aggregation occurs within the slurry and phase separation has occurred.

[0069] In one embodiment, the catalyst may comprise a support and a catalyst metal supported on the support. The catalyst metal is not particularly limited and may be platinum or a platinum alloy. The platinum alloy may be an alloy of a metal comprising platinum and at least one of gold, silver, cobalt, nickel, iron, palladium, ruthenium, titanium, vanadium, or chromium.

[0070] The above support can be used without particular limitation as long as it is a material that acts as a support to allow the catalytic metal to be supported, and in one embodiment, the support may include at least one of carbon black, carbon nanotube, carbon nanofiber, graphite carbon, graphene, or graphene oxide.

[0071] The method of supporting the catalyst metal is not particularly limited, and, for example, the catalyst metal precursor can be supported by introducing the support and the catalyst metal precursor into a solvent and then reducing the catalyst metal precursor on the surface of the support or by depositing the catalyst metal on the support.

[0072] In one embodiment, the ionomer is not particularly limited and may include a polymer material having cation conductivity. For example, it may include a perfluorosulfonic acid-based polymer such as Nafion.

[0073] In one embodiment, the electrode for the fuel cell may include at least one of an anode or a cathode.

[0074] FIG. 5 illustrates a method for manufacturing a membrane-electrode assembly for a fuel cell according to another embodiment of the present invention. The method for manufacturing the membrane-electrode assembly for a fuel cell may include manufacturing a fuel cell electrode according to the method for manufacturing a fuel cell electrode described above, and stacking a proton-conducting electrolyte membrane (M) and the fuel cell electrode (E) and passing them between a pair of rolling rolls. Although FIG. 5 illustrates the electrode being stacked on only one side of the electrolyte membrane, the electrode may be stacked on the remaining side of the electrolyte membrane through the same process. Although FIG. 5 illustrates one of the pair of rolling rolls as the second roll of the transfer unit, a separate roller may be provided for rolling the electrode and the electrolyte membrane.

[0075] Thus, according to the present invention, after manufacturing an electrode for a fuel cell using sound waves, a membrane-electrode assembly can be manufactured through a continuous process involving an electrolyte membrane and a transfer process.

[0077] Although embodiments of the present invention have been described above, those skilled in the art may modify and change the present invention in various ways by adding, changing, deleting, or adding components, etc., without departing from the spirit of the invention as described in the claims, and such modifications and changes are also to be included within the scope of the rights of the present invention. Explanation of the symbols

[0078] 110: 1st roller 120: 2nd roller 200: Cotter 300: Dryer 400: Sound wave disperser 410: 1st Sound Disperser 420: Second sound disperser 430: Third sound disperser 411, 421, 431: 1st Sound Dispersion Unit 412, 422, 432: 2nd Sound Dispersion Unit SS: Entry SR: Slurry M: Electrolyte membrane

Claims

Claim 1 An electrode manufacturing apparatus for a fuel cell comprising: a conveying unit including a first roller and a second roller for continuously conveying a substrate in one direction; a supply unit including a coater for applying a slurry onto the substrate; a drying unit located downstream of the supply unit and including a dryer for removing a solvent in the slurry; and a dispersion unit located on the side of the substrate coated with the slurry and including an acoustic disperser for applying acoustic waves to the slurry. Claim 2 In claim 1, the sound wave disperser is positioned between the point where the slurry is applied on the substrate and the point where the slurry applied on the substrate passing through the drying section is dried by 80%, in a fuel cell electrode manufacturing apparatus. Claim 3 In claim 1, the sound wave disperser comprises a first sound wave dispersion unit located on one side of the substrate and a second sound wave dispersion unit located on the other side, wherein the first sound wave dispersion unit and the second sound wave dispersion unit are provided at corresponding positions to each other, an electrode manufacturing device for a fuel cell. Claim 4 In claim 1, the electrode manufacturing apparatus for a fuel cell, wherein the sound wave disperser is arranged to be spaced apart from the side of the substrate coated with the slurry by a predetermined distance. Claim 5 In claim 1, the dispersion unit comprises at least two sound wave dispersers along the direction in which the substrate coated with the slurry moves, in a fuel cell electrode manufacturing apparatus. Claim 6 In claim 5, the plurality of sound wave dispersers are arranged to be spaced apart from each other, a fuel cell electrode manufacturing device. Claim 7 An electrode manufacturing apparatus for a fuel cell according to claim 6, wherein the spacing between the plurality of sound wave dispersers is 10 cm to 50 cm. Claim 8 In claim 5, the plurality of sound wave dispersers are arranged such that the wavelength of the sound wave decreases as it moves downstream relative to the direction in which the substrate coated with the slurry moves, in a fuel cell electrode manufacturing apparatus. Claim 9 In claim 8, the plurality of sound wave dispersers are arranged such that the wavelength of the sound wave decreases by 20% or less as it moves downstream, in a fuel cell electrode manufacturing apparatus. Claim 10 In claim 1, the sound wave disperser has a size of 1 cm to 15 cm with respect to the conveying direction of the substrate and a size greater than or equal to the thickness of the slurry with respect to the stacking direction of the slurry applied on the substrate, an apparatus for manufacturing electrodes for a fuel cell. Claim 11 In claim 1, the wavelength of the sound wave applied to the slurry is 20 Hz to 1 x 10 6 Hz phosphorus, fuel cell electrode manufacturing device Claim 12 A method for manufacturing an electrode for a fuel cell, comprising: applying a slurry onto a substrate moving in a roll-to-roll manner; applying sound waves to the slurry applied onto the substrate; and drying the slurry. Claim 13 In claim 12, a method for manufacturing an electrode for a fuel cell, wherein the slurry does not contain an additive for suppressing phase separation. Claim 14 In claim 12, the method for manufacturing an electrode for a fuel cell comprises the slurry including a solvent, a catalyst, and an ionomer. Claim 15 A method for manufacturing an electrode for a fuel cell according to claim 14, wherein the average particle size of the mixture comprising the catalyst and the ionomer is 50 nm to 50 µm. Claim 16 In claim 14, a method for manufacturing an electrode for a fuel cell, wherein the catalyst comprises a support and a catalyst metal supported on the support. Claim 17 A method for manufacturing an electrode for a fuel cell, wherein, in claim 12, the sound wave is applied between the point where the slurry is applied on the substrate and the point where the slurry applied on the substrate is dried by 80%. Claim 18 In claim 12, a method for manufacturing an electrode for a fuel cell, wherein the wavelength of the sound wave decreases as it moves downstream relative to the direction in which the substrate coated with the slurry moves. Claim 19 In claim 12, a method for manufacturing a fuel cell electrode wherein the fuel cell electrode comprises at least one of an anode or a cathode. Claim 20 A method for manufacturing a membrane-electrode assembly for a fuel cell, comprising manufacturing an electrode for a fuel cell according to any one of claims 12 to 19, and laminating a proton-conducting electrolyte membrane and the electrode for the fuel cell and passing them between a pair of rolling rolls.

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