Membrane electrode double-sided gap alignment transfer method and system

Abstract

The application discloses a membrane electrode double-face gap alignment transfer printing method and system, and the system comprises a transfer printing substrate winding and unwinding mechanism used for winding and unwinding the transfer printing substrate, a proton exchange membrane winding and unwinding mechanism used for winding and unwinding the proton exchange membrane, a first roller pressing mechanism used for transferring a half of the catalyst coating on the transfer printing substrate to a first roll of the proton exchange membrane, and a second roller pressing mechanism used for transferring the other half of the catalyst coating on the transfer printing substrate to a second roll of the proton exchange membrane. The device has simple structure, less control points, and the transfer printing method is convenient, so that the automatic alignment transfer printing of the anode catalyst gap and the cathode catalyst gap is realized, and the production cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of hydrogen fuel cell membrane electrode manufacturing technology, specifically relating to a method and system for double-sided gap alignment and transfer of membrane electrodes. Background Technology

[0002] A fuel cell is an energy conversion device that directly converts the chemical energy in fuel into electrical energy; also known as an electrochemical generator, it is the fourth clean power generation technology after hydropower, wind power, and nuclear power. Among these, fuel cell technology using hydrogen as direct fuel is the most mature. Compared to internal combustion engine systems, which are limited by the Carnot cycle effect and have an insurmountable bottleneck in fuel thermal efficiency (maximum 50%), fuel cells convert a portion of the Gibbs free energy in fuel into electrical energy through independent electrochemical reactions at the anode and cathode, achieving a conversion efficiency of up to 83%. Furthermore, as the site of the chemical reaction, the fuel cell has no mechanical transmission components during the output of electrical energy. Hydrogen fuel cells operate at temperatures below 100°C, and the only emission is water, thus eliminating noise pollution and harmful emissions, aligning with the development concepts of protecting the ecological environment and energy conservation and emission reduction.

[0003] The basic principle of a hydrogen fuel cell is the reverse reaction of water electrolysis. The specific reaction process is as follows: Taking the anode reaction as an example, hydrogen gas is introduced into the anode. The hydrogen gas passes through the gas diffusion layer to the catalyst surface. Under the action of the catalytically active metal platinum, the hydrogen bonds of the hydrogen molecules break, releasing electrons. These electrons travel through an external load circuit to the cathode, while the hydrogen nuclei (protons) pass through the proton exchange membrane to the cathode and combine with oxygen atoms to form water. In the entire hydrogen fuel cell system, the membrane electrode assembly (MEA) is the core component and the site of the electrochemical reaction; its performance directly determines the performance of the fuel cell. From the anode side to the cathode side, its specific structural arrangement is: gas diffusion layer—anode catalyst layer—proton exchange membrane—cathode catalyst layer—gas diffusion layer. Considering the poor structural strength and susceptibility to deformation of the proton exchange membrane, the mainstream manufacturing process is to first coat the catalyst layer on a temporary transitional transfer substrate at intervals or continuously, and then transfer the catalyst layer from the transfer substrate to the proton exchange membrane through a transfer process. To ensure the performance of the MEA, the boundary lines of the anode and cathode catalyst layers need to be aligned on both sides of the proton exchange membrane. Errors generated during the intermittent coating process of the catalyst layer accumulate gradually during the continuous double-sided transfer of the catalyst, causing increasingly severe misalignment of the anode and cathode catalyst layers. This leads to significant difficulties in automating the continuous double-sided transfer process. While the continuous coating process of the catalyst layer does not have intermittent errors, transferring the continuously coated catalyst layer onto the proton exchange membrane requires intermittent transfer to form alternating transfer zones. However, this intermittent transfer method results in the waste of catalyst layers. Furthermore, the catalyst contains expensive metals such as platinum and iridium, increasing production costs.

[0004] Therefore, there is an urgent need to develop a process that can achieve precise double-sided transfer of the catalyst layer of the membrane electrode, so as to realize the automated production of membrane electrodes while avoiding the waste of the catalyst layer. Summary of the Invention

[0005] This invention is proposed to overcome the shortcomings of the prior art, and its purpose is to provide a method and system for double-sided gap alignment and transfer of membrane electrodes.

[0006] This invention is achieved through the following technical solution:

[0007] A membrane electrode double-sided gap alignment and transfer system, comprising:

[0008] A transfer substrate receiving and placing mechanism is used to receive and place transfer substrates, which includes an upper transfer substrate receiving and placing unit and a lower transfer substrate receiving and placing unit arranged in a mirror image symmetrically.

[0009] A proton exchange membrane take-up and take-up mechanism is used to take up and take up proton exchange membranes and is disposed between an upper transfer substrate take-up and take-up unit and a lower transfer substrate take-up and take-up unit. It includes a front proton exchange membrane take-up and take-up unit and a rear proton exchange membrane take-up and take-up unit placed along the travel direction of the transfer substrate.

[0010] A roller pressing mechanism is used to transfer half of the catalyst coating on the transfer substrate onto the first roll of proton exchange membrane;

[0011] The two-stage rolling mechanism is used to transfer the other half of the catalyst coating on the transfer substrate to the second roll of proton exchange membrane.

[0012] In the above technical solution, both the upper and lower transfer substrate unwinding units include a transfer substrate, a transfer substrate unwinding machine for releasing the completely black transfer substrate, and a transfer substrate rewinding machine for recycling the blank transfer substrate. A transfer substrate tension sensor is provided between the transfer substrate unwinding machine and the transfer substrate rewinding machine.

[0013] In the above technical solution, a movable roller is provided between the upper transfer substrate tension sensor and the two-stage roller pressing mechanism, and the tension of the upper transfer substrate is interlocked with the movable roller on the upper transfer substrate.

[0014] In the above technical solution, the lower transfer substrate receiving and unloading unit also includes a guide roller arranged symmetrically with the through roller.

[0015] In the above technical solution, both the front proton exchange membrane unwinding unit and the rear proton exchange membrane unwinding unit include a proton exchange membrane, a proton exchange membrane unwinding machine for releasing the proton exchange membrane, and a proton exchange membrane winding machine for winding the 3CCM finished product. The front proton exchange membrane unwinding machine of the front proton exchange membrane unwinding unit is located near the unwinding side of the transfer substrate unwinding mechanism, and the rear proton exchange membrane winding machine of the rear proton exchange membrane unwinding unit is located near the winding side of the transfer substrate unwinding mechanism.

[0016] In the above technical solution, both the first-stage roller pressing mechanism and the second-stage roller pressing mechanism include concave rollers and flat rollers arranged in the vertical direction, and the concave rollers and flat rollers are distributed on both sides of the transfer substrate receiving and discharging mechanism.

[0017] In the above technical solution, multiple rectangular grooves are evenly distributed on the outer circumference of the concave roller, the bottom of the groove is an arc surface, and the curvature of the arc surface is the same as the curvature of the outer circumference of the concave roller.

[0018] A method for double-sided gap alignment and transfer of a membrane electrode includes the following steps:

[0019] (I) Use two alignment belts instead of the transfer substrate to be threaded first. By adjusting the movable roller on the path of the upper transfer substrate, ensure that the paths of the upper and lower transfer substrates from the first roller pressing mechanism to the second roller pressing mechanism are equal. After the adjustment is completed, retract the alignment belt and thread the production transfer substrate.

[0020] (II) A pair of transfer substrates coated with a catalyst coating are arranged in a clamping manner, and two pairs of pressure rollers are arranged on the outside of the transfer substrates.

[0021] (III) Using the transfer action of the first concave roller, half of the catalyst coating of the transfer substrate is transferred onto the first roll of proton exchange membrane, so that equidistant transfer areas and blank areas are formed on the first roll of proton exchange membrane. After the first roll of proton membrane is rolled up, it becomes a 3CCM finished product.

[0022] (IV) After half of the transfer substrate is transferred, it travels along an equal path from the first pair of concave rollers to the second pair of flat rollers. The remaining half of the catalyst coating on the transfer substrate will be automatically aligned and transferred to the second roll of proton exchange membrane. The second roll of proton exchange membrane is then wound up to become the 3CCM finished product.

[0023] In the above technical solution, the alignment strip is a rigid material, and the rigid material is aluminum foil.

[0024] In the above technical solution, the alignment belt is provided with multiple evenly distributed transfer alignment areas and blank alignment areas, which are staggered. The size of the transfer alignment areas is the same as that of the catalyst transfer area on the proton exchange membrane, and the size of the blank alignment areas is the same as that of the blank area on the proton exchange membrane.

[0025] The beneficial effects of this invention are:

[0026] This invention provides a method and system for aligning and transferring the gap between two sides of a membrane electrode. The device has a simple structure, few control points, and a convenient transfer method, which realizes automated alignment and transfer of the gap between the anode and cathode catalysts while reducing production costs. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the concave pressure roller in this invention;

[0029] Figure 3 This is a cross-sectional view of the concave pressure roller in this invention;

[0030] Figure 4 This is a schematic diagram of the alignment band in this invention.

[0031] in:

[0032] 1. Upper transfer substrate 2. Upper transfer substrate tension sensor

[0033] 3. Transfer substrate 4. Tension sensor for transfer substrate

[0034] 5. Roller pass 6. First roll of proton exchange membrane

[0035] 7. Front proton exchange membrane unwinding machine; 8. Front proton exchange membrane rewinding machine

[0036] 9. Second roll of proton exchange membrane 10. Post-proton exchange membrane rewinder

[0037] 11. Post-proton exchange membrane unwinding machine; 12. Concave pressure roller.

[0038] 13 Flat rollers, 14 Grooves.

[0039] For those skilled in the art, other related figures can be obtained from the above figures without any creative effort. Detailed Implementation

[0040] To enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0041] like Figure 1 As shown, a double-sided gap alignment and transfer system for hydrogen fuel cell membrane electrode assemblies includes:

[0042] Transfer substrate receiving and placing mechanism, used for receiving and placing transfer substrate;

[0043] A proton exchange membrane storage and take-up mechanism is used to store and take up proton exchange membranes.

[0044] A roller pressing mechanism is used to transfer half of the catalyst coating on the transfer substrate onto the first roll of proton exchange membrane;

[0045] The two-stage rolling mechanism is used to transfer the other half of the catalyst coating on the transfer substrate to the second roll of proton exchange membrane.

[0046] The transfer substrate receiving and discharging mechanism includes an upper transfer substrate receiving and discharging unit and a lower transfer substrate receiving and discharging unit arranged in a mirror image symmetrically.

[0047] The upper transfer substrate unwinding unit includes an upper transfer substrate 1, an upper transfer substrate unwinding machine for releasing completely black upper transfer substrate, and an upper transfer substrate rewinding machine for recycling blank upper transfer substrate. An upper transfer substrate tension sensor 2 is provided between the upper transfer substrate unwinding machine and the upper transfer substrate rewinding machine.

[0048] The lower transfer substrate unwinding unit includes a lower transfer substrate 3, a lower transfer substrate unwinding machine for releasing completely black lower transfer substrate, and a lower transfer substrate rewinding machine for recycling blank lower transfer substrate. A lower transfer substrate tension sensor 4 is provided between the lower transfer substrate unwinding machine and the lower transfer substrate rewinding machine.

[0049] Guide rollers are provided before and after the upper transfer substrate tension sensor 2 and the lower transfer substrate tension sensor 4. After being guided by the guide rollers, the included angle between the transfer substrates before and after the tension sensor is a right angle.

[0050] In this embodiment, to adjust the tension of the upper transfer substrate, a movable guide roller 5 is provided between the upper transfer substrate tension sensor 2 and the two-stage roller pressing mechanism. The tension of the upper transfer substrate is interlocked with the movable guide roller 5 on the upper transfer substrate. When the upper transfer substrate tension sensor 2 detects that the tension value is too high, the guide roller 5 moves downward, and vice versa. Meanwhile, to ensure that the path of the transfer substrate from the first-stage roller pressing mechanism to the second-stage roller pressing mechanism is consistent, the lower transfer substrate receiving and unloading unit also includes a guide roller arranged symmetrically to the guide roller 5.

[0051] The proton exchange membrane take-up and unwrap mechanism is disposed between the upper transfer substrate take-up and unwrap unit and the lower transfer substrate take-up and unwrap unit. It includes a front proton exchange membrane take-up and unwrap unit and a rear proton exchange membrane take-up and unwrap unit placed along the travel direction of the transfer substrate. The front proton exchange membrane take-up and unwrap unit includes a first roll of proton exchange membrane 6, a front proton exchange membrane unwinder 7 for releasing the first roll of proton exchange membrane, and a front proton exchange membrane rewinder 8 for rewinding the 3CCM finished product. The rear proton exchange membrane take-up and unwrap unit includes a second roll of proton exchange membrane 9, a rear proton exchange membrane unwinder 11 for releasing the second roll of proton exchange membrane, and a rear proton exchange membrane rewinder 10 for rewinding the 3CCM finished product. The front proton exchange membrane unwinder 7 is disposed near the unwinding side of the transfer substrate take-up and unwrap mechanism, and the rear proton exchange membrane rewinder 10 is disposed near the rewinding side of the transfer substrate take-up and unwrap mechanism.

[0052] In this embodiment, both the front proton exchange membrane take-up and take-down unit and the rear proton exchange membrane take-up and take-down unit include a steering roller for reorienting the proton exchange membrane.

[0053] In this embodiment, in order to reduce the area occupied by the device, the front proton exchange membrane unwinding machine 7, the rear proton exchange membrane winding machine 10 and the guide roller are located on the same horizontal line, and the rear proton exchange membrane unwinding machine 11 and the front proton exchange membrane winding machine 8 are arranged vertically.

[0054] Both the first-stage and second-stage roller pressing mechanisms include concave rollers 12 and flat rollers 13 arranged in the vertical direction, with the concave rollers 12 and flat rollers 13 distributed on both sides of the transfer substrate receiving and discharging mechanism.

[0055] like Figure 2 , 3 As shown, the outer circumference of the concave roller 12 is evenly distributed with multiple rectangular grooves 14. The bottom of the groove 14 is an arc surface, and the arc of the arc surface is the same as the arc of the outer circumference of the concave roller. The arc length of the groove bottom is the same as the arc length of a single segment of the circumference after the outer circumference of the concave roller 12 is divided by the grooves.

[0056] In this embodiment, two grooves are provided on the outer circumference of the concave pressure roller.

[0057] Example 2

[0058] Based on the apparatus of Example 1, a method and system for double-sided gap alignment and transfer of a membrane electrode includes the following steps:

[0059] (I) Use two specially made alignment belts instead of the transfer substrate to be threaded first. By adjusting the movable rollers on the path of the upper transfer substrate, ensure that the paths of the upper and lower transfer substrates from the first roller pressing mechanism to the second roller pressing mechanism are equal. That is, the upper and lower transfer substrates take the first roller pressing mechanism as the starting point and the second roller pressing mechanism as the ending point. The length that the upper and lower transfer substrates travel from the starting point to the ending point is the "path". After the adjustment is completed, retract the alignment belt and thread the production transfer substrate.

[0060] (II) A pair of transfer substrates coated with a catalyst coating are arranged in a clamping manner, and two pairs of concave pressure rollers are arranged on the outside of the transfer substrates.

[0061] (III) Using the transfer action of a roller pressing mechanism, half of the catalyst coating of the transfer substrate is transferred onto the first roll of proton exchange membrane, so that equidistant transfer areas and blank areas are formed on the first roll of proton exchange membrane. After the first roll of proton membrane is rolled up, it becomes a 3CCM finished product.

[0062] (IV) After half of the transfer substrate has been transferred, it travels through an equal-length path from the first roller pressing mechanism to the second roller pressing mechanism. At this time, the remaining half of the catalyst coating on the transfer substrate will be automatically aligned and transferred to the second roll of proton exchange membrane. The second roll of proton exchange membrane is then rolled up to become the 3CCM finished product.

[0063] like Figure 4 As shown, the alignment strip is made of aluminum foil, on which multiple evenly distributed transfer alignment areas and blank alignment areas are provided. The transfer alignment areas and blank alignment areas are arranged alternately, and the size of the transfer alignment area is the same as that of the catalyst transfer area on the proton exchange membrane, and the size of the blank alignment area is the same as that of the blank area on the proton exchange membrane.

[0064] Working principle of the invention:

[0065] This invention utilizes a two-stage rolling process—a concave roller and a flat roller—to transfer a completely black transfer substrate onto two independently wound proton exchange membranes in two separate stages. The first stage, consisting of a four-section concave roller, transfers half of the catalyst coating from the black substrate to the proton exchange membrane. By ensuring a consistent length of the transfer substrate from the first to the second roller, the remaining half of the catalyst layer on the substrate automatically aligns and is successfully transferred at the start of the second stage of transfer.

[0066] During the production process, the 3CCM finished products transferred in the first stage were undoubtedly aligned and there were no disturbance factors. The main reasons why the catalyst coating could not be aligned during the second stage of transfer were: 1. Manufacturing errors of the two pairs of pressure rollers, that is, the linear speed of the two rollers was inconsistent when the system was running, which caused the substrate on one side to travel too fast, resulting in misalignment of the second roll of 3CCM finished products; 2. The different tensions on the upper and lower transfer substrates caused the difference in deformation, resulting in misalignment.

[0067] To address the above issues, a control method for the transfer system is proposed: This system employs two tension sensors. During system operation, the tension values ​​of the two tension sensors are identical. The tension sensor arranged on the lower transfer substrate is used to interlock the rotational speeds of the two pairs of pressure rollers. The upper transfer substrate is equipped with a vertically movable guide roller to adjust the tension of the upper transfer substrate. Under the control of the two tension systems, the synchronous rotation of the two pairs of rollers can be achieved, ensuring consistent tension between the upper and lower transfer substrates.

[0068] For example, the target value of the tension sensors for both the upper and lower transfer substrates is set to 15N. The tension sensor of the lower transfer substrate is interlocked with the speed control of the two-stage pressure rollers. When the sensor detects that the tension value is too high, the pressure rollers decelerate, and vice versa, thus ensuring that the tension of the lower transfer substrate is always 15N. The tension of the upper transfer substrate is interlocked with the movable roller on the upper transfer substrate. When the sensor detects that the tension value is too high, the roller moves downward, and vice versa.

[0069] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0070] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0071] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0072] The applicant declares that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention fall within the protection and disclosure scope of the present invention.

Claims

1. A membrane electrode double-sided gap alignment transfer printing system, characterized by: The application relates to a roll-to-roll production device for 3CCM (Catalyst Coated Membrane) fuel cell membrane electrode assembly. The device comprises: a transfer substrate winding and unwinding mechanism for winding and unwinding the transfer substrate, which comprises an upper transfer substrate winding and unwinding unit and a lower transfer substrate winding and unwinding unit arranged in mirror image; the upper and lower transfer substrate winding and unwinding units each comprise a transfer substrate, a transfer substrate unwinding machine for unwinding the full black transfer substrate and a transfer substrate winding machine for winding the blank transfer substrate, and a transfer substrate tension sensor is arranged between the transfer substrate unwinding machine and the transfer substrate winding machine; a proton exchange membrane winding and unwinding mechanism for winding and unwinding the proton exchange membrane, which is arranged between the upper transfer substrate winding and unwinding unit and the lower transfer substrate winding and unwinding unit, and comprises a front proton exchange membrane winding and unwinding unit and a rear proton exchange membrane winding and unwinding unit arranged along the running direction of the transfer substrate; the front and rear proton exchange membrane winding and unwinding units each comprise a proton exchange membrane, a proton exchange membrane unwinding machine for unwinding the proton exchange membrane and a proton exchange membrane winding machine for winding the 3CCM product; a first roll pressing mechanism for transferring the half catalyst coating on the transfer substrate to the first roll of proton exchange membrane; a second roll pressing mechanism for transferring the other half catalyst coating on the transfer substrate to the second roll of proton exchange membrane; 2. The membrane-electrode bi-gap alignment transfer printing system of claim 1, wherein: the first and second roll pressing mechanisms each comprise a concave pressing roller and a flat pressing roller arranged in the up-down direction.

3. The membrane-electrode bi-gap alignment transfer printing system of claim 1, wherein: A guide roller is arranged in front of and behind the transfer substrate tension sensor, and the included angle between the transfer substrates in front of and behind the tension sensor is a right angle after being guided by the guide rollers.

4. The membrane-electrode bi-gap alignment transfer printing system of claim 1, wherein: A movable over roller is arranged between the upper transfer substrate tension sensor and the second roll pressing mechanism, and the upper transfer substrate tension is interlocked with the movable over roller on the upper transfer substrate.

5. The membrane-electrode bi-gap alignment transfer printing system of claim 1, wherein: The lower transfer substrate winding and unwinding unit further comprises a guide roller arranged in mirror image with the over roller.

6. The membrane-electrode bi-gap alignment transfer printing system of claim 1, wherein: The front proton exchange membrane unwinding machine of the front proton exchange membrane winding and unwinding unit is arranged close to the unwinding side of the transfer substrate winding and unwinding mechanism, and the rear proton exchange membrane winding machine of the rear proton exchange membrane winding and unwinding unit is arranged close to the winding side of the transfer substrate winding and unwinding mechanism.

7. The membrane-electrode bi-gap alignment transfer printing system of claim 6, wherein: The concave pressing rollers and the flat pressing rollers are distributed on both sides of the transfer substrate winding and unwinding mechanism.

8. A membrane electrode double-sided gap alignment transfer printing method, characterized by: The outer circumferences of the concave pressing rollers are uniformly provided with a plurality of rectangular grooves, the groove bottoms of the grooves are circular arc surfaces, and the radii of the circular arc surfaces are the same as the radii of the outer circumferences of the concave pressing rollers. The device comprises the following steps: (I) two alignment tapes are used to replace the transfer substrate to be threaded, the equal path of the upper and lower transfer substrates from the first roll pressing mechanism to the second roll pressing mechanism is ensured by adjusting the movable over roller on the upper transfer substrate path, and the alignment tapes are retracted and the production transfer substrate is threaded after the adjustment is completed; (II) a pair of transfer substrates coated with catalyst coating are arranged in a clamping manner, and two pairs of pressing rollers are arranged on the outer side of the transfer substrates; (III) the transfer action of the first concave pressing roller is utilized to transfer the half catalyst coating on the transfer substrate to the first roll of proton exchange membrane, so that the first roll of proton exchange membrane forms equidistant transfer areas and blank areas, and the first roll of proton exchange membrane becomes a 3CCM product after being wound; (IV) the transfer substrate after half transfer passes through the equal length path of the first pair of concave pressing rollers and reaches the second pair of flat pressing rollers, and the remaining half catalyst coating on the transfer substrate is automatically aligned and transferred to the second roll of proton exchange membrane, and the second roll of proton exchange membrane becomes a 3CCM product after being wound.

9. The membrane-electrode bi-gap alignment transfer printing method according to claim 8, characterized by: The alignment tape is made of rigid material, and the rigid material is aluminum foil.

10. The membrane-electrode bi-gap alignment transfer printing method according to claim 8, characterized by: The alignment tape is provided with a plurality of uniformly distributed transfer alignment areas and blank alignment areas, the transfer alignment areas and the blank alignment areas are staggered, the size of the transfer alignment areas is same as that of the catalyst transfer area on the proton exchange membrane, and the size of the blank alignment areas is same as that of the blank area on the proton exchange membrane.

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