Method for producing electrolyte membrane for fuel cell with improved durability

Abstract

The present disclosure relates to a method for manufacturing an electrolyte membrane for a fuel cell, which can effectively remove cross-migrating hydrogen and / or air. Specifically, the method includes: coating a slurry including at least an ionomer on a substrate to manufacture an ion transport layer; manufacturing a laminate including a substrate and an ion transport layer; and arranging a pair of laminates to form an electrolyte membrane, wherein the ion transport layer has a catalyst region formed on one side thereof based on a center line in a width direction thereof, and the catalyst region includes a catalyst.

Description

Technical Field

[0001] The present disclosure relates to a method for manufacturing an electrolyte membrane for a fuel cell, which can effectively remove cross-over hydrogen and / or air. Background Art

[0002] Generally, polymer electrolyte membrane fuel cells (PEMFCs) are used as fuel cells for vehicles. In order for PEMFCs to normally exhibit high output performance of at least tens of kilowatts under various operating conditions of vehicles, PEMFCs must operate stably over a wide current density range.

[0003] The reaction for generating electricity in a fuel cell occurs in a membrane-electrode assembly (MEA), which includes a perfluorinated sulfonic acid (PFSA) ionomer-based electrolyte membrane and an anode / cathode. Hydrogen supplied to the anode, which is an oxidation electrode, decomposes into hydrogen ions (protons) and electrons. The hydrogen ions move through the membrane to the cathode, which is a reduction electrode, and the electrons move to the cathode through an external circuit. At the cathode, oxygen molecules, hydrogen ions, and electrons react with each other to generate electricity and produce water (H 2 O) and heat as reaction by-products.

[0004] Hydrogen and air (oxygen), which are the reaction gases of the fuel cell, may cross-move in the electrolyte membrane. At this time, hydrogen peroxide (HOOH) may be generated. When hydrogen peroxide (HOOH) decomposes into oxygen-containing radicals such as hydroxyl radicals (·OH) and peroxyhydroxyl radicals (·OOH), these radicals corrode the electrolyte membrane, causing chemical degradation of the electrolyte membrane and ultimately reducing the durability of the fuel cell.

[0005] In order to solve the above problems, a method of adding a noble metal-based catalyst such as platinum (Pt) to an electrolyte membrane to remove cross-migrated hydrogen and air (oxygen) by reacting the cross-migrated hydrogen and air (oxygen) into water has been studied in recent years.

[0006] The above information disclosed in this background section is provided only to enhance understanding of the background of the present disclosure and therefore the above information may contain information that does not constitute the prior art already known to those skilled in the art. Summary of the invention

[0007] The present disclosure is directed to solving the above-mentioned problems associated with the prior art.

[0008] An object of the present disclosure is to provide a method for manufacturing an electrolyte membrane for a fuel cell, which method is capable of maintaining the durability of the electrolyte membrane equal to or higher than that of a conventional electrolyte membrane while reducing the amount of a noble metal-based catalyst such as platinum used.

[0009] The objects of the present disclosure are not limited to the above objects. The objects of the present disclosure will be clearly understood from the following description, and the objects of the present disclosure can be implemented by the methods defined in the claims and their combinations.

[0010] In one aspect, the present disclosure provides a method for manufacturing an electrolyte membrane for a fuel cell, the method comprising: coating a slurry including at least an ionomer on a substrate to manufacture an ion transfer layer; manufacturing a laminate including the substrate and the ion transfer layer; and arranging a pair of laminates to form an electrolyte membrane, wherein the ion transfer layer has a catalyst region formed on at least one side thereof based on a center line in a width direction thereof, the catalyst region including a catalyst.

[0011] The catalyst region may be formed from one end of the ion transport layer to a boundary line spaced apart from the one end by a predetermined distance toward a center line in the width direction.

[0012] The width of the catalyst region may be equal to or less than 1 / 2 of the width of the ion transport layer.

[0013] The ion transport layer may be manufactured using a die coater, and a slurry including the ionomer and the catalyst may be discharged through a portion of a nozzle of a die head provided in the die coater to form a catalyst region.

[0014] The catalyst may include one selected from the group consisting of platinum (Pt), gold (Au), palladium (Pd), silver (Ag), osmium (Os), iridium (Ir), ruthenium (Ru), and combinations thereof.

[0015] The substrate may include a release paper selected from the group consisting of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polytetrafluoroethylene (PTFE), polyimide (PI), polypropylene (PP), and combinations thereof.

[0016] A pair of laminated bodies may be arranged such that catalyst regions included in the ion transport layers are located in opposing regions to each other to form an electrolyte membrane.

[0017] A pair of laminated bodies may be arranged so that the catalyst regions included in the ion transport layers are located in the same region to form an electrolyte membrane.

[0018] The laminate may be wound on rolls, wherein an outer surface roll on which the ion transport layer is wound to face the outside and an inner surface roll on which the ion transport layer is wound to face the inside may be prepared, and the ion transport layers are brought into contact with each other so that the catalyst region is located in the same region.

[0019] A first ion transport layer and a second ion transport layer can be formed, the first ion transport layer having a catalyst region formed on one side thereof with respect to the center line in the width direction, and the second ion transport layer having a catalyst region formed on the other side thereof with respect to the center line in the width direction, and the first ion transport layer and the second ion transport layer can be laminated to contact each other so that the catalyst regions are located in the same region.

[0020] The method may further include disposing a porous reinforcement layer on the ion transport layer such that the ion transport layer is impregnated with the reinforcement layer.

[0021] The reinforcing layer may include one selected from the group consisting of polytetrafluoroethylene (PTFE), expanded polytetrafluoroethylene (e-PTFE), polyethylene (PE), polypropylene (PP), polyphenylene oxide (PPO), polybenzimidazole (PBI), polyimide (PI), polyvinylidene fluoride (PVdF), polyvinyl chloride (PVC) and combinations thereof.

[0022] In another aspect, the present disclosure provides a method for manufacturing a fuel cell, the method comprising: forming electrode layers on opposite surfaces of an electrolyte membrane to obtain a membrane electrode assembly; and coupling the membrane electrode assembly and a gasket to each other so that a catalyst region of the electrolyte membrane is located on a hydrogen inlet side and an air inlet side. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other features of the present disclosure will now be described in detail with reference to some exemplary embodiments of the present disclosure shown in the accompanying drawings, which are given hereinafter by way of illustration only and therefore do not limit the present disclosure, and in which:

[0024] Figure 1 is a flow chart showing a method for manufacturing an electrolyte membrane for a fuel cell according to the present disclosure;

[0025] Figure 2A is a perspective view schematically showing an ion transport layer according to the present disclosure;

[0026] Figure 2B is along Figure 2A A cross-sectional view taken along line CC';

[0027] Figure 3 is a diagram schematically showing a die coater that can be used in the present disclosure;

[0028] Figure 4 is a cross-sectional view showing another embodiment of an ion transport layer according to the present disclosure;

[0029] Figure 5A , Figure 5B , Figure 5C and Figure 5D is a reference diagram showing a first embodiment of a method for manufacturing an electrolyte membrane for a fuel cell according to the present disclosure;

[0030] Fig. 6A is a plan view showing a fuel cell obtained using the electrolyte membrane manufactured according to the first embodiment;

[0031] Figure 6B is a bottom view of the fuel cell;

[0032] Fig. 7A , Figure 7B , Figure 7C and Fig.7D is a reference diagram showing a second embodiment of a method for manufacturing an electrolyte membrane for a fuel cell according to the present disclosure;

[0033] Fig. 8A , Figure 8B , Figure 8C and Fig.8D is a reference diagram showing a third embodiment of a method for manufacturing an electrolyte membrane for a fuel cell according to the present disclosure;

[0034] Fig.9A is a plan view showing a fuel cell obtained using the electrolyte membrane manufactured according to the second embodiment or the third embodiment;

[0035] Fig. 9B is a bottom view of a fuel cell; and

[0036] Fig.10 is a cross-sectional view showing another embodiment of the electrolyte membrane according to the present disclosure.

[0037] It should be understood that the accompanying drawings are not necessarily drawn to scale, presenting a somewhat simplified representation of various preferred features illustrating the basic principles of the present disclosure. The specific design features of the present disclosure disclosed herein, including such as specific dimensions, directions, locations and shapes, will be determined in part by the specific intended application and use environment.

[0038] In the drawings, reference numbers refer to the same or equivalent parts of the present disclosure throughout the several figures of the drawing. DETAILED DESCRIPTION

[0039] The above-mentioned objects and other objects, features and advantages will be clearly understood through the following preferred embodiments with reference to the accompanying drawings. However, the present disclosure is not limited to these embodiments and will be implemented in different forms. The embodiments are presented only to provide a thorough and complete understanding of the disclosed content and are sufficient to inform those skilled in the art of the technical concept of the present disclosure.

[0040] Throughout the description of the accompanying drawings, the same reference numerals refer to the same elements. In the accompanying drawings, for clarity, the size of the structure is exaggerated. It will be understood that, although the terms "first", "second", etc. may be used herein to describe various elements, the corresponding elements should not be understood to be limited by these terms, which are only used to distinguish one element from another element. For example, within the scope defined by the present disclosure, the first element may be referred to as the second element, and similarly, the second element may be referred to as the first element. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form.

[0041] It will be further understood that when the terms "comprising," "having," and the like are used in this specification, the presence of the features, numbers, steps, operations, elements, components, or combinations thereof is specified, but the presence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof is not excluded. In addition, it will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, the element may be directly on the other element, or there may be intervening elements. It will also be understood that when an element such as a layer, film, region, or substrate is referred to as being "under" another element, the element may be directly under the other element, or there may be intervening elements.

[0042] Unless the context clearly indicates otherwise, all numbers, values ​​and / or expressions used in this specification that represent the amount of ingredients, reaction conditions, polymer compositions and mixtures are approximate values, which reflect the uncertainty of various measurements inherent in obtaining these values. For this reason, it should be understood that in all cases, the term "about" should modify all numbers, values ​​and / or expressions. In addition, when numerical ranges are disclosed in this specification, unless otherwise specified, these ranges are continuous and include all numbers from the minimum value in the range to the maximum value and include the maximum value. In addition, when a range refers to an integer, unless otherwise specified, the range includes all integers from the minimum value in the range to the maximum value and includes the maximum value.

[0043] Figure 1is a flow chart showing a method for manufacturing a fuel cell electrolyte membrane according to the present disclosure. Figure 1 The method comprises: in step S10, coating a slurry including at least an ionomer on a substrate to produce an ion transport layer; in step S20, producing a laminate including a substrate and an ion transport layer; and in step S30, arranging a pair of laminates to form an electrolyte membrane.

[0044] Figure 2A is a perspective view schematically showing an ion transport layer 22 according to the present disclosure. Figure 2B is along Figure 2A A cross-sectional view taken along line CC'. Figure 2A and Figure 2B The ion transport layer 22 may have a widthwise center line L 0 The catalyst region A is formed on one side thereof as a reference, and the catalyst region A includes a catalyst. The catalyst region A includes not only the surface of the ion transport layer 22 but also the inside of the ion transport layer 22 in the thickness direction. The width direction center line L 0 It refers to an imaginary line formed by connecting the width-direction center points of the specific points of the ion transport layer 22. 0 It may be the width direction center line of the laminate 20 which will be described below. In this case, the width direction center line L 0 The line may refer to an imaginary line formed by connecting the widthwise center points of the specific points of the laminate 20 to each other.

[0045] The remaining portion of the ion transport layer 22 except the catalyst region A is referred to as a non-catalyst region B. Figure 2A In the figure, the catalyst region A and the non-catalyst region B are clearly distinguished by straight lines, however, this is for ease of understanding. The two regions can be Figure 2B The two regions may be distinguished from each other as shown, or the two regions may be distinguished from each other along a gently undulating profile, or the two regions may be somewhat unclearly distinguished from each other due to a concentration gradient of the catalyst. The ion transport layer 22 according to the present disclosure has a central line L in the width direction thereof. 0 The catalyst region A is formed on one side thereof as a reference. Various forms satisfying this requirement fall within the scope of the present disclosure.

[0046] The catalyst region A can be formed from one end L of the ion transport layer 22. 1 Formed to the center line L in the width direction 0 With one end L 1 The boundary line L separated by a predetermined distance 2 In this case, the width of the catalyst area A, i.e., the width from one end L 1 To the border line L2 The distance may be 1 / 2 or less of the width W of the ion transport layer 22. If the width of the catalyst region A exceeds 1 / 2 of the width W of the ion transport layer 22, it is difficult to maximize the effect of reducing the amount of catalyst used.

[0047] The ion transport layer 22 may be manufactured using a die coater. Figure 3 Schematic diagram of the die coater 60. Figure 3 , a slurry including a catalyst and an ionomer is discharged onto a substrate 21 through a portion of a nozzle 62 of a die head 61 arranged in a die coater 60, and at the same time, a slurry including at least an ionomer is discharged onto the substrate 21 through the remaining portion of the nozzle 62, thereby manufacturing an ion transfer layer 22 having a catalyst region A and a non-catalyst region B.

[0048] A plurality of slurry introduction parts 63 may be arranged in the width direction of the substrate 21 , and a slurry including a catalyst and an ionomer may be introduced into a portion of the slurry introduction parts 63 to form the catalyst region A.

[0049] The catalyst is not particularly limited as long as the catalyst has sufficient activity to react hydrogen and air that cross-move in the electrolyte membrane with each other. For example, the catalyst may include an element selected from the group consisting of platinum (Pt), gold (Au), palladium (Pd), silver (Ag), osmium (Os), iridium (Ir), ruthenium (Ru) and combinations thereof.

[0050] The ionomer may include a polymer having a hydrogen ion conductive functional group. The hydrogen ion conductive functional group may include sulfonic acid, sulfonate, carboxylic acid, carboxylate, phosphoric acid, and phosphate. For example, the ionomer may include a perfluorinated sulfonic acid (PFSA) ionomer having a hydrogen ion conductive functional group.

[0051] The slurry forming the non-catalyst region B may include at least an ionomer and may further include an antioxidant. For example, the antioxidant may include a cerium-based or terephthalic acid-based antioxidant, such as cerium oxide or ceria and cerium (III) nitrate hexahydrate. The antioxidant is added to the non-catalyst region B where the catalyst is not present to treat a very small amount of gas that is not removed from the catalyst region A.

[0052] The substrate 21 may include a release paper selected from the group consisting of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polytetrafluoroethylene (PTFE), polyimide (PI), polypropylene (PP), and combinations thereof.

[0053] Figure 4 is a cross-sectional view showing another embodiment of the ion transport layer 22 according to the present disclosure. A porous reinforcing layer 30 may be inserted into the ion transport layer 22. Therefore, the method may further include: disposing the porous reinforcing layer 30 on the ion transport layer 22 so that the ion transport layer 22 is impregnated with the reinforcing layer 30.

[0054] The reinforcement layer 30 is provided to increase the mechanical rigidity of the electrolyte membrane. The reinforcement layer 30 may include a material selected from the group consisting of polytetrafluoroethylene (PTFE), expanded polytetrafluoroethylene (e-PTFE), polyethylene (PE), polypropylene (PP), polyphenylene oxide (PPO), polybenzimidazole (PBI), polyimide (PI), polyvinylidene fluoride (PVdF), polyvinyl chloride (PVC) and a combination thereof, and may be a porous membrane having a plurality of pores.

[0055] The size of the pores of the reinforcement layer 30 may be larger than the size of the particles of the catalyst, ionomer and antioxidant, so that the reinforcement layer 30 may also be impregnated with the catalyst, antioxidant and the like.

[0056] In step S20, the laminate 20 obtained by forming the ion transport layer 22 on the substrate 21 may be wound. A pair of winding rolls obtained by winding the laminate 20 on a roll or the like may be prepared, the rolls may be laminated so that the ion transport layers 22 of the laminate 20 face each other, and in step S30, the substrate 21 may be removed to manufacture the electrolyte membrane 10. Hereinafter, the above steps will be described in detail.

[0057] In this method, first, FIG. 5A to FIG. 5D As shown, a pair of laminates 20 and 20 ′ are provided to form the electrolyte membrane 10 , and are provided so that catalyst regions A and A′ included in ion transport layers 22 and 22 ′ are located in opposing regions to each other.

[0058] Specifically, first, Figure 5A and Figure 5B As shown, laminates 20 and 20' having ion transport layers 22 and 22' formed on substrates 21 and 21' may be prepared. Figure 5A and Figure 5B 2 , but each of the laminates 20 and 20 ′ may be provided in the form of a winding roll.

[0059] Then, if Figure 5C As shown, laminates 20 and 20' may be positioned so that ion transport layers 22 and 22' face each other, and as shown in FIG. Figure 5DAs shown, the transfer may be performed while removing the substrates 21 and 21 ′ to obtain the electrolyte membrane 10 .

[0060] Reference Figure 5D , it can be seen that the catalyst regions A and A′ are located in opposite regions of the electrolyte membrane 10 .

[0061] The manufacturing method of the fuel cell according to the present disclosure may include: using FIG. 5A to FIG. 5D Electrodes are formed on opposite surfaces of the electrolyte membrane 10 manufactured by the method shown to obtain a membrane electrode assembly; and the membrane electrode assembly and the gasket are coupled to each other so that the catalyst regions A and A' of the electrolyte membrane 10 are located on the hydrogen inlet side and the air inlet side.

[0062] In a fuel cell, the amount of cross-moving gas is the largest on the hydrogen inlet side and the air inlet side, and the electrolyte membrane deteriorates most seriously on the hydrogen inlet side and the air inlet side. The technical feature of the present disclosure is that a catalyst is locally added to the electrolyte membrane on the hydrogen inlet side and the air inlet side, thereby achieving the greatest effect with the least amount of catalyst, that is, maximizing the durability of the electrolyte membrane.

[0063] Fig. 6A is a plan view of a fuel cell, Figure 6B is a bottom view of a fuel cell. For ease of description, the electrodes are omitted, and only the electrolyte membrane 10 and the gasket 50 are shown. In addition, although the catalyst region is not exposed, Fig. 6A Floor plan and Figure 6B The bottom view also shows catalyst areas A and A'. Figure 5D The cross-sectional diagram helps to understand Fig. 6A and Figure 6B The structure of the electrolyte membrane. Fig. 6A It can be seen that the catalyst region A' is located on the air inlet 53 side. Figure 6B , it can be seen that the catalyst region A is located on the hydrogen inlet 51 side.

[0064] exist FIG. 7A to FIG. 7D In the illustrated method, a pair of laminates 20 and 20 ′ are provided to form the electrolyte membrane 10 , and the pair of laminates 20 and 20 ′ are provided so that catalyst regions A and A′ included in ion transport layers 22 and 22 ′ are located in the same region.

[0065] Specifically, first, Fig. 7A As shown, a laminate 20 having an ion transport layer 22 formed on a substrate 21 may be prepared. The laminate 20 may be wound on a roll, and an outer surface roll 41 wound with the ion transport layer 22 facing the outside and an inner surface roll 42 wound with the ion transport layer 22' facing the inside may be prepared.

[0066] Then, if Figure 7B As shown, the outer surface roller 41 and the inner surface roller 42 are positioned, and the winding rollers may be laminated so that the ion transport layers 22 and 22' are in contact with each other. Figure 7B Only a portion of each of the ion transport layers 22 and 22' unwound from the take-up roll for lamination is shown, and the substrate is removed from the inner surface roll 42 for lamination.

[0067] That is to say, when Figure 7B When the winding rollers 41 and 42 are arranged as shown, the Figure 7C In this state, if the transfer is performed while removing the substrate 21, the following is obtained: Fig.7D The electrolyte membrane 10 is shown.

[0068] Reference Fig.7D , it can be seen that the catalyst regions A and A' of the electrolyte membrane 10 are located in regions pointing in the same direction.

[0069] In addition, in order to obtain the electrolyte membrane 10 configured so that the catalyst regions A and A' are located in the same region, the following method can be used to manufacture the electrolyte membrane 10. In this method, first, as Fig. 8A As shown in FIG. 1 , a laminate 20 including a first ion transport layer 22 having a catalyst region A formed on one side thereof and a first ion transport layer 22 having a catalyst region A formed on one side thereof is prepared. Figure 8B As shown, a laminate 20' including a second ion transport layer 22' having a catalyst region A' formed on the other side thereof is prepared.

[0070] Then, if Figure 8C As shown, the laminates 20 and 20' can be positioned so that the ion transport layers 22 and 22' face each other, and can be transferred while removing the substrates 21 and 21' to obtain Fig.8D The electrolyte membrane 10 is shown.

[0071] Reference Fig.8D , it can be seen that the catalyst regions A and A' of the electrolyte membrane 10 are located in regions pointing in the same direction.

[0072] The manufacturing method of the fuel cell according to the present disclosure may include: using FIG. 7A to FIG. 7D or FIG. 8A to FIG. 8D Electrodes are formed on opposite surfaces of the electrolyte membrane 10 manufactured by the method shown to obtain a membrane electrode assembly; and the membrane electrode assembly and the gasket are coupled to each other so that the catalyst regions A and A' of the electrolyte membrane 10 are located on the hydrogen inlet side and the air inlet side.

[0073] Fig.9A is a plan view of a fuel cell, Fig. 9Bis a bottom view of a fuel cell. For ease of description, the electrodes are omitted, and only the electrolyte membrane 10 and the gasket 50 are shown. Fig.9A It can be seen that the catalyst region A' is located on the hydrogen inlet 51 side. Fig. 9B It can be seen that the catalyst region A is located on the air inlet 53 side.

[0074] In the fuel cell, the hydrogen inlet 51 and the air inlet 53 may be positioned and arranged differently according to the embodiment. In the method according to the present disclosure, various electrolyte membranes 10 may be manufactured using one laminate 20, thereby flexibly corresponding to changes in the position and arrangement of the hydrogen inlet 51 and the air inlet 53.

[0075] Meanwhile, in the case where the electrolyte membrane 10 is applied to a low-output fuel cell in which the amount of gas transmitted is small, such as Fig.10 As shown, the catalyst region A may be formed in only one of the ion transport layers included in a pair of laminates, for example, the ion transport layer 22 ′, so that the amount of catalyst used may be reduced.

[0076] As is apparent from the foregoing, according to the present disclosure, it is possible to maintain the durability of an electrolyte membrane equal to or higher than that of a conventional electrolyte membrane while reducing the amount of precious metal-based catalyst such as platinum used, thereby ensuring price competitiveness of the product.

[0077] In addition, according to the present disclosure, various electrolyte membranes can be formed using the ion transport layer obtained through a one-time or two-time coating process, so that the applicability thereof is excellent.

[0078] The effects of the present disclosure are not limited to the effects mentioned above. It should be understood that the effects of the present disclosure include all effects that can be inferred from the foregoing description of the present disclosure.

[0079] Embodiments of the present disclosure have been described with reference to the accompanying drawings. However, it will be apparent to those skilled in the art that the present disclosure may be implemented in a specific form different from that set forth herein without departing from the ideas and essential features of the present disclosure. Therefore, the above embodiments should be interpreted in all aspects as being illustrative and not restrictive.

Claims

1. A method for manufacturing an electrolyte membrane for a fuel cell, comprising: coating a slurry including at least an ionomer on a substrate to produce an ion transport layer; manufacturing a laminate comprising the substrate and the ion transport layer; as well as A pair of laminates are provided to form the electrolyte membrane, The ion transport layer has a catalyst region formed on at least one side based on the center line in the width direction, and the catalyst region includes a catalyst. The ion transport layer includes a non-catalyst region except the catalyst region.

2. The method according to claim 1, wherein: The catalyst region is formed from one end of the ion transport layer to a boundary line spaced apart from the one end by a predetermined distance toward the widthwise center line.

3. The method according to claim 1, wherein: The width of the catalyst region is equal to or less than 1 / 2 of the width of the ion transport layer.

4. The method according to claim 1, wherein: The ion transport layer is manufactured using a die coater, and A slurry including an ionomer and a catalyst is discharged through a portion of a nozzle of a die head provided in the die coater to form the catalyst region.

5. The method according to claim 1, wherein: The catalyst includes an element selected from the group consisting of platinum (Pt), gold (Au), palladium (Pd), silver (Ag), osmium (Os), iridium (Ir), ruthenium (Ru), and combinations thereof.

6. The method according to claim 1, wherein: The substrate includes a release paper selected from the group consisting of polyethylene terephthalate, polyethylene naphthalate, polytetrafluoroethylene, polyimide, polypropylene, and combinations thereof.

7. The method according to claim 1, wherein: A pair of the laminated bodies is arranged so that the catalyst regions included in the ion transport layers are located in opposing regions to each other to form the electrolyte membrane.

8. The method according to claim 1, wherein: A pair of the laminated bodies is arranged so that the catalyst regions included in the ion transport layers are located in the same region to form the electrolyte membrane.

9. The method according to claim 8, wherein: The laminate is wound on rolls, preparing an outer surface roll on which the ion transport layer is wound to face the outside and an inner surface roll on which the ion transport layer is wound to face the inside, and The ion transport layers are brought into contact with each other so that the catalyst regions are located in the same region.

10. The method according to claim 8, wherein: forming a first ion transport layer and a second ion transport layer, wherein the first ion transport layer has a catalyst region formed on one side based on the center line in the width direction, and the second ion transport layer has a catalyst region formed on the other side based on the center line in the width direction, and The first ion transport layer and the second ion transport layer are laminated to contact each other so that the catalyst region is located in the same region.

11. The method according to claim 1, further comprising: A porous reinforcement layer is disposed on the ion transport layer such that the ion transport layer is impregnated with the reinforcement layer.

12. The method according to claim 11, wherein: The reinforcing layer includes one selected from the group consisting of polytetrafluoroethylene, expanded polytetrafluoroethylene, polyethylene, polypropylene, polyphenylene ether, polybenzimidazole, polyimide, polyvinylidene fluoride, polyvinyl chloride and combinations thereof.

13. A method for manufacturing a fuel cell, comprising: forming electrode layers on opposite surfaces of the electrolyte membrane for a fuel cell manufactured according to claim 1 to obtain a membrane electrode assembly; as well as The membrane electrode assembly and the gasket are coupled to each other so that the catalyst region of the electrolyte membrane is located on the hydrogen inlet side and the air inlet side.

Images