CN113745565A - Electrolyte membrane fixing method of fuel cell membrane electrode and application thereof - Google Patents
Electrolyte membrane fixing method of fuel cell membrane electrode and application thereof Download PDFInfo
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 132
- 238000000034 method Methods 0.000 title claims abstract description 71
- 239000000446 fuel Substances 0.000 title claims abstract description 29
- 210000000170 cell membrane Anatomy 0.000 title claims description 19
- 238000005507 spraying Methods 0.000 claims abstract description 50
- 238000007665 sagging Methods 0.000 claims abstract description 16
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0289—Means for holding the electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention particularly relates to a method for fixing an electrolyte membrane of a membrane electrode of a fuel cell and application thereof, belonging to the technical field of fuel cells, wherein the method comprises the following steps: obtaining a preset droop distance and preset droop time; the method comprises the following steps of obtaining a clamp, wherein a force application contact unit is arranged on the edge of the clamp corresponding to an electrolyte membrane and used for fixing the electrolyte membrane in a contact manner; adopting the clamp to perform pressure application pre-fixing on the electrolyte membrane, wherein in the pressure application pre-fixing, the pressure applied by the clamp on the electrolyte membrane is gradually increased until the maximum sagging distance of the electrolyte membrane does not exceed the preset sagging distance within the preset sagging time, so as to obtain preset pressure; fixing the electrolyte membrane by adopting the clamp according to the preset pressure to finish the fixation; by utilizing the suspension mode of the electrolyte membrane, the suspension placement state of the electrolyte membrane is ensured in the whole spraying process, the electrolyte membrane is ensured not to be contacted with foreign objects, and the membrane pollution problem caused by foreign objects is further avoided.
Description
Technical Field
The invention belongs to the technical field of fuel cells, and particularly relates to a method for fixing an electrolyte membrane of a membrane electrode of a fuel cell and application thereof.
Background
The membrane electrode is a key component which affects the performance of the fuel cell as the place where the hydrogen-oxygen electrochemical reaction of the fuel cell occurs. The membrane electrode consists of an electrolyte membrane, a catalyst layer and a gas diffusion layer, wherein the catalyst layer and the gas diffusion layer are arranged on two sides of the membrane, and besides the intrinsic properties of raw materials, the processing mode and the specific processing technology have decisive influence on the performance of the membrane electrode.
The membrane electrode can be classified into three generations according to the processing mode. Methods for preparing Gas Diffusion Electrodes (GDEs), membrane-coated catalytic layers (CCMs), and ordered electrodes, respectively. The first generation GDE preparation method is that precious metal catalyst layer slurry is deposited on a carbon fiber gas diffusion layer to prepare a gas diffusion electrode, and then two gas diffusion electrodes are fixed on two sides of an electrolyte membrane in a hot pressing mode; the second generation CCM preparation method is to deposit noble metal catalyst layers on both sides of an electrolyte membrane and fix a carbon fiber gas diffusion layer material outside the catalyst layers on both sides respectively. Compared with the first generation GDE preparation method, the CCM method ensures good contact between the electrolyte membrane and the catalyst layer, and reduces contact resistance; meanwhile, compared with a gas diffusion layer substrate, the membrane is smoother, the dosage of a catalyst in the CCM preparation process is reduced, the cost is reduced, and the membrane is the most widely used membrane electrode processing mode at present. The third generation of ordered electrodes is to further reduce the amount of noble metal catalyst in the membrane electrode, and the ordered growth of noble metal and carrier particles is realized by utilizing methods of directionally designing catalyst layer structures such as carbon nanotube/nanowire arrays, metal oxide arrays and the like, but the processing mode is still not mature at present, and the third generation of ordered electrodes is still in the laboratory research and small-range mass production stage, and faces the problems of easy flooding, poor performance, difficult preparation, difficult mass production and the like.
At present, the most used second-generation CCM preparation method is realized by a plurality of processes, the preparation method for depositing the catalyst layer on the electrolyte membrane can be well realized by a transfer printing process, a spraying process, a slit coating process and the like, the industrialization is correspondingly realized, and the mass production products produced by the corresponding processes are also available in the membrane electrode market. The spraying process can prepare more uniform catalyst layers and more excellent performance, and has more applications in laboratory research and production line volume production of membrane electrodes.
In the conventional CCM spray coating process, a substrate to be coated (electrolyte membrane) is fixed on a plane, and a nozzle performs spray coating in a predetermined region according to a program setting certificate. The state of the deposited slurry is controlled by controlling parameters such as spraying path, speed, height, flow rate, pressure and the like.
Because the electrolyte membrane in the membrane electrode generally adopts a perfluorinated sulfonic acid proton exchange membrane which is sensitive to water and humidity, the shrinkage and deformation of the membrane are difficult to avoid in the process that a solvent contained in the spraying slurry contacts the electrolyte membrane in the spraying process; in addition, because the electrolyte membrane used in the current membrane electrode is a thin-film material with very thin thickness and very light weight, the disturbance of air near the spray head can be caused to generate air flow in the spraying process, the air flow can influence the state of the membrane in the spraying process, and the problems that the preparation process is influenced by folds, bulges, folding and the like of the membrane are caused, so that the spraying effect is poor.
One of the existing solutions is to fix the sprayed electrolyte membrane by a pressing tool fixing manner during the spraying process, wherein the pressing tool can be a dispersed pressing block pressing corners and edges of the membrane, or a hollow pressing tool directly pressing the whole outer edge. If the electrolyte membrane is fixed by the dispersion compact, the spray route and the spray area are specified by setting the spray path. If the electrolyte membrane is fixed through the hollowed-out pressing tool, the effective spraying area can be controlled through the hollowed-out area. The method has the following problems: 1. the force applied by the presser to the electrolyte membrane cannot be controlled. The hold-down is fixed by applying its own weight to the electrolyte membrane, but this weight cannot be controlled and selected: if the weight of the pressing tool is too light, a good fixing effect cannot be achieved; if the weight of the pressing tool is too large, a film may be dented, and stress concentration may occur on the contact surface between the weight and the film, thereby causing mechanical damage to the film. 2. The cleanliness of the pressing tool. The membrane electrode needs to be kept clean to a certain degree in the preparation process, and the electrolyte membrane is used as an electrolyte layer of the fuel cell to play a role in transferring protons, and the cleanliness directly influences the performance of the membrane electrode. If the hold-down cannot ensure high cleanliness, impurities may be introduced into the electrolyte membrane during the manufacturing process. 3. Continuous production is not possible. Because the tool needs to be placed on the membrane, if a plurality of CCMs need to be prepared, the continuous production cannot be realized through the process of manually placing the tool on and taking the tool off for many times or by a machine.
The other solution is as follows: the electrolyte membrane itself is not a porous material and can be fixed by a vacuum adsorption method. Vacuum adsorption tightly fixes the membrane on the adsorption plane by a pressure difference by constructing a vacuum layer between the adsorption plane and the electrolyte membrane. The method has the following problems: 1. the cleanliness of the film. The electrolyte membrane needs to guarantee high cleanliness, but in the vacuum adsorption process, the lower surface of the membrane needs to be in contact with the adsorption plane, and impurities on the adsorption plane can affect the cleanliness of the membrane. 2. Adsorbing the flatness of the substrate. In order to solve the cleanliness problem of the membrane, some solutions add a clean porous material as an isolating antifouling layer between the adsorption plane and the electrolyte membrane, as shown in the following figures. In order to ensure good adsorption, vacuum must be drawn between the electrolyte membrane and the adsorption plane, so the anti-contamination layer must be made of a porous material to ensure that the vacuum inside it can be conducted from the adsorption plane to the lower surface of the electrolyte membrane. However, the surface of the porous material has pores, so that the flatness of the contact surface of the anti-pollution layer and the electrolyte membrane cannot reach the standard due to the pores, and the lower surface of the electrolyte membrane may have depressions and crimples caused by the uneven contact surface, so that the adsorption and spraying effects are affected. 3. Continuous production is not possible. Because the vacuum adsorption needs to fix the membrane on the adsorption plane, the adsorption process is carried out before the spraying of the membrane, the desorption process is carried out after the spraying is finished, if a plurality of CCMs need to be prepared, the processes of placing the membrane on the adsorption plane and taking the membrane off the adsorption plane by manpower or machines for many times are needed, and the continuous production cannot be realized.
Disclosure of Invention
The present application aims to provide a method for fixing an electrolyte membrane of a fuel cell membrane electrode and an application thereof, so as to solve the problem of electrolyte membrane pollution caused by fixing the electrolyte membrane in the prior art.
The embodiment of the invention provides a method for fixing an electrolyte membrane of a membrane electrode of a fuel cell, which comprises the following steps:
obtaining a preset droop distance and preset droop time;
the method comprises the following steps of obtaining a clamp, wherein a force application contact unit is arranged on the edge of the clamp corresponding to an electrolyte membrane and used for fixing the electrolyte membrane in a contact manner;
adopting the clamp to perform pressure application pre-fixing on the electrolyte membrane, wherein in the pressure application pre-fixing, the pressure applied by the clamp on the electrolyte membrane is gradually increased until the maximum sagging distance of the electrolyte membrane does not exceed the preset sagging distance within the preset sagging time, so as to obtain preset pressure;
and fixing the electrolyte membrane by adopting the clamp according to the preset pressure to finish the fixation.
Optionally, the preset droop distance is determined according to a distance between the force application contact units of the clamp.
Optionally, the preset drooping distance h and the distance L1 between the force application contact units of the clamp satisfy the following relationship: h/L1 is less than or equal to 1 percent.
Optionally, the clamp includes a pair of fixed roller sets, and at least one roller of the fixed roller sets is provided with a force application unit for providing the preset pressure required by the electrolyte membrane.
Optionally, the film outlet length L2 of the electrolyte membrane between the pair of fixed roller sets and the distance L1 of the urging contact units of the pair of fixed roller sets satisfy the following relationship: l1 is not less than L2 is not less than L1 is 102%.
Optionally, the clamp includes a pair of fixing clamping plates, and a clamping unit is arranged on the adjacent plate surfaces of the pair of fixing clamping plates, so as to provide the preset pressure required by the electrolyte membrane; the middle parts of the pair of fixing clamping plates are hollowed out.
Optionally, the fixed splint is in a shape of a clip, and the clamping units are disposed at four vertexes of the fixed splint.
Optionally, the fixing splint is in a shape of a clip, and the clamping unit is laid along an edge of the fixing splint.
Optionally, the clamping unit is a magnetic clamp.
Based on the same inventive concept, the embodiment of the invention also provides an application of the electrolyte membrane fixing method of the fuel cell membrane electrode, and the application comprises the step of applying the electrolyte membrane fixing method of the fuel cell membrane electrode to the spraying of the electrolyte membrane.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
the electrolyte membrane fixing method of the fuel cell membrane electrode provided by the embodiment of the invention comprises the following steps: obtaining a preset droop distance and preset droop time; the method comprises the following steps of obtaining a clamp, wherein a force application contact unit is arranged on the edge of the clamp corresponding to an electrolyte membrane and used for fixing the electrolyte membrane in a contact manner; adopting the clamp to perform pressure application pre-fixing on the electrolyte membrane, wherein in the pressure application pre-fixing, the pressure applied by the clamp on the electrolyte membrane is gradually increased until the maximum sagging distance of the electrolyte membrane does not exceed the preset sagging distance within the preset sagging time, so as to obtain preset pressure; fixing the electrolyte membrane by adopting the clamp according to the preset pressure to finish the fixation; by utilizing the suspension mode of the electrolyte membrane, the suspension placement state of the electrolyte membrane is ensured in the whole spraying process, the electrolyte membrane is ensured not to be contacted with foreign objects, and the membrane pollution problem caused by foreign objects is further avoided.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic view of a clamp structure provided by an embodiment of the present invention 1;
FIG. 2 is a schematic view of a clamp structure provided by an embodiment of the present invention 2;
FIG. 3 is a schematic view of a clamp structure provided by an embodiment of the present invention 3;
FIG. 4 is a polarization graph of the membrane electrodes prepared in example 1 of the present invention and comparative example 1;
FIG. 5 is a polarization graph of the membrane electrodes prepared in example 2 of the present invention and comparative example 1;
FIG. 6 is a flow chart of a method provided by an embodiment of the present invention;
reference numerals: 1-fixed roller group, 2-fixed splint, 3-clamping unit and 4-electrolyte membrane.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments and examples, and the advantages and various effects of the present invention will be more clearly apparent therefrom. It will be understood by those skilled in the art that these specific embodiments and examples are for the purpose of illustrating the invention and are not to be construed as limiting the invention.
Throughout the specification, unless otherwise specifically noted, terms used herein should be understood as having meanings as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. If there is a conflict, the present specification will control.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
according to an exemplary embodiment of the present invention, there is provided a method of fixing an electrolyte membrane of a fuel cell membrane electrode, the method including:
s1, obtaining a preset droop distance and preset droop time;
as an alternative embodiment, the preset droop distance is determined according to the spacing of the force application contact units of the clamp; specifically, the preset drooping distance h and the pitch L1 of the force application contact unit of the jig satisfy the following relationship: h/L1 is less than or equal to 1 percent.
The applicant has found that the use of a special fixture made in a suspended manner, in combination with the application of a special force to the electrolyte membrane, ensures that the membrane is held horizontally taut during the spraying process, and prevents the electrolyte membrane from collapsing and deforming due to the solvent carried in during the spraying process.
S2, obtaining a clamp, wherein a force application contact unit is arranged on the edge of the clamp corresponding to the electrolyte membrane and used for fixing the electrolyte membrane in a contact manner;
specifically, the structure of the jig may be: as shown in fig. 1, the clamping apparatus includes a pair of fixed roller sets, at least one of which is provided with a force applying unit for providing the predetermined pressure required for the electrolyte membrane. The structure of the clamp can also be that the clamp comprises a pair of fixed clamping plates, and the adjacent plate surfaces of the pair of fixed clamping plates are provided with clamping units for providing the preset pressure required by the electrolyte membrane; the middle parts of the pair of fixing clamping plates are hollowed out. In actual operation, as shown in fig. 2, the fixed splint is in a shape of a square, and the clamping units are arranged at four vertexes of the fixed splint; meanwhile, the clamping units are arranged in other ways, for example, as shown in fig. 3, the fixed clamping plate is in a shape of a square, the clamping units are laid along the edge of the fixed clamping plate, and the clamping units can be magnetic clamps.
For example, in the case where the jig includes a pair of fixed roller sets, the electrolyte membrane is fixed by winding and winding, and the length L2 of the discharged membrane is substantially equal to the distance L1 (which can also be understood as the projected length of the electrolyte membrane) between the centers of the windings, and L2 can be slightly longer than L1 with an error of 2%, that is: l1 is less than or equal to L2 is less than or equal to L1 multiplied by 102 percent; after controlling the length L2 of the electrolyte membrane, pressure is added above the electrolyte membrane according to the figure, so as to ensure the tight state of the membrane and prevent the membrane from wrinkling and deforming during the spraying process. And setting a program to enable the spray head to perform spraying work on the upper surface of the tightening area according to a set path and area.
For example, when the fixture comprises a pair of fixing clamping plates, the electrolyte membrane with a certain area is cut and fixed in a square hollow tool in the shape of the Chinese character 'hui', and the square hollow tool in the shape of the Chinese character 'hui' is composed of an upper part and a lower part which are the same. The tool is made of common metal or alloy material, and the total thickness of the two parts of the tool is 5-10 cm. When the electrolyte membrane is fixed, the periphery of the electrolyte membrane is in a tightening state. And after the tool is suspended and fixed, setting a path and an area according to a program, and spraying the upper surface of the tightened area.
The edge of the electrolyte membrane and the edge of the tool are fixed by adopting a magnetic clamp, a plurality of magnetic clamps are arranged between the two parts of the tool to fix the electrolyte membrane, and after the tool is clamped, a magnetic field is added externally to control the clamping force of the magnetic clamps.
S3, performing pressure application pre-fixing on the electrolyte membrane by using the clamp, wherein in the pressure application pre-fixing, the pressure applied to the electrolyte membrane by the clamp is gradually increased until the maximum sagging distance of the electrolyte membrane does not exceed the preset sagging distance within the preset sagging time, so as to obtain preset pressure;
taking the case where the jig includes a pair of fixed roller sets as an example, the electrolyte membrane is preliminarily fixed to the jig and then left for a sufficiently long time. Due to the action of gravity, the electrolyte membrane clamped and fixed is not in a completely ideal horizontal state, a certain amount of dropping is generated from the center of gravity, the maximum dropping distance h of the electrolyte membrane (namely the dropping height of the center of gravity of the membrane) can be directly influenced by the pressure of the clamp on the electrolyte membrane, generally speaking, the smaller N is, the larger h is, and the larger N is, the smaller h is. In the spraying process, the ratio of the falling height of the film to the horizontal length needs to be maintained within a certain range, and generally: h/L1 is less than or equal to 1 percent, so the minimum pressure N corresponding to h/L1 is less than or equal to 1 percent is the required pressure, wherein L1 is the distance between the force application contact units of the clamp.
It should be noted that, due to the difference of the materials clamping the electrolyte membrane, the friction coefficients of the electrolyte membrane and the clamping materials are different (taking two clamps as an example, the friction coefficient between the membrane and the winding material and the friction coefficient between the membrane and the tool metal material respectively), and the corresponding N values of different materials are different.
And S4, fixing the electrolyte membrane by adopting the clamp according to the preset pressure to finish fixing.
According to another exemplary embodiment of the present invention, there is provided an application of the electrolyte membrane fixing method of a fuel cell membrane electrode, including applying the electrolyte membrane fixing method of a fuel cell membrane electrode provided as above to spraying of the electrolyte membrane.
The method for fixing the electrolyte membrane of the fuel cell membrane electrode and its application of the present application will be described in detail with reference to examples, comparative examples and experimental data.
Example 1
A commercial electrolyte membrane (the thickness of the membrane is 15 mu m) is selected, the protective membrane on the outer layer of the electrolyte membrane is removed, and the electrolyte membrane is fixed in a winding mode. The fixed roll material is PVC plastic with a diameter of 10 cm. And cutting the electrolyte membrane, wherein the length of the cut size is slightly longer than 340mm, and the width of the cut size is 340 mm. The electrolyte membrane was clamped with the horizontal distance between the left and right clamping points kept at 340mm, i.e., L1-340 mm.
In order to press the web on the upper side of the electrolyte membrane, a vertically downward pressure was applied to a pressure value equal to 50N, at which time the electrolyte membrane was measured to a maximum sag height of 2.5mm, i.e., h-2.5 mm, using electrophotographic technology. At this time:
after the fixation is finished, setting the spraying parameters, and spraying according to the following spraying parameters:
the height of the spray head is as follows: 15-50 cm;
moving speed of the spray head: 30-150 mm/s;
the liquid outlet flow of the spray head is as follows: 1.5-8 mL/min;
the pressure of the effluent gas is as follows: 15-50 kPa;
number of active area spray-coating times: 1-8 times.
And after the single-side spraying is finished, drying the spraying area at 80-120 ℃, and then spraying the other side according to the same operation to finish the spraying.
A membrane electrode was prepared after adding commercial gas diffusion layers on both sides by cutting an active area of 50mm × 50mm from the CCM layer after completion of both-side spraying.
Example 2
A commercial electrolyte membrane (thickness of 15 μm) was selected, the outer protective film of the electrolyte membrane was removed, and the electrolyte membrane was fixed using a magnetic clamp. The magnetic clamp is made of 304 stainless steel, and the hollowed-out part (electrolyte membrane spraying part) of the magnetic clamp is 340mm multiplied by 340 mm.
A set pressure N of 35N for the magnetic clamp, at which time:
after the fixation is finished, setting the spraying parameters, and spraying according to the following spraying parameters:
the height of the spray head is as follows: 15-50 cm;
moving speed of the spray head: 30-150 mm/s;
the liquid outlet flow of the spray head is as follows: 1.5-8 mL/min;
the pressure of the effluent gas is as follows: 15-50 kPa;
number of active area spray-coating times: 1-8 times.
And after the single-side spraying is finished, drying the spraying area at 80-120 ℃, and then spraying the other side according to the same operation to finish the spraying.
A membrane electrode was prepared after adding commercial gas diffusion layers on both sides by cutting an active area of 50mm × 50mm from the CCM layer after completion of both-side spraying.
Comparative example 1
The comparative example was the same as example 1 except that the jig used was a pressure fixing jig of the prior art.
Comparative example 2
This comparative example is the same as example 2 except that the jig used was a pressure fixing jig of the prior art.
Examples of the experiments
The membrane electrodes obtained in examples 1 to 2 and comparative examples 1 to 2 were mounted in a single cell jig and subjected to an electrical output performance test (I-V polarization curve test), the results of which are shown in fig. 4 and 5.
As can be seen, examples 1 and 2 using the patented technology exhibited better performance on the I-V polarization curve than comparative examples 1 and 2 using conventional existing clamps. At 2000mA/cm, in comparison with comparative example 12The output voltage of the embodiment 1 is 20mV higher under the current density; at 2000mA/cm, in comparison with comparative example 22The output voltage of example 2 was 40mV higher at the current density.
One or more technical solutions in the embodiments of the present invention at least have the following technical effects or advantages:
(1) the method provided by the embodiment of the invention utilizes the suspension mode of the electrolyte membrane, ensures the suspension state of the electrolyte membrane in the whole spraying process, ensures that the electrolyte membrane is not in contact with foreign objects, and avoids the stress problem caused by external force and the membrane pollution problem caused by foreign objects. Meanwhile, special force is applied to the electrolyte membrane, the membrane is ensured to be in a horizontal and tight state in the spraying process, and shrinkage and deformation of the electrolyte membrane caused by solvent brought in the spraying process are prevented;
(2) according to the method provided by the embodiment of the invention, the difference between the length of the film and the projection length is controlled within a certain range, so that the flatness of the film in a static state can be ensured; the clamping force given to the film when the tool is fixed is controlled, so that the film can be ensured not to relatively slide, deform or wrinkle in the whole dynamic spraying process;
(3) the method provided by the embodiment of the invention has the possibility of continuous production, and if a winding mode is adopted, the continuous spraying production can be realized by rotating the winding device in a roll-to-roll mode.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A method of fixing an electrolyte membrane of a fuel cell membrane electrode, comprising:
obtaining a preset droop distance and preset droop time;
the method comprises the following steps of obtaining a clamp, wherein a force application contact unit is arranged on the edge of the clamp corresponding to an electrolyte membrane and used for fixing the electrolyte membrane in a contact manner;
adopting the clamp to perform pressure application pre-fixing on the electrolyte membrane, wherein in the pressure application pre-fixing, the pressure applied by the clamp on the electrolyte membrane is gradually increased until the maximum sagging distance of the electrolyte membrane does not exceed the preset sagging distance within the preset sagging time, so as to obtain preset pressure;
and fixing the electrolyte membrane by adopting the clamp according to the preset pressure to finish the fixation.
2. The fuel cell membrane electrode electrolyte membrane fixing method according to claim 1, wherein the preset sagging distance is determined according to a pitch of the force application contact unit of the jig.
3. The fuel cell membrane electrode electrolyte membrane fixing method according to claim 2, wherein the preset drooping distance h and the distance L1 of the force application contact unit of the jig satisfy the following relationship: h/L1 is less than or equal to 1 percent.
4. The method of fixing an electrolyte membrane of a membrane electrode assembly for a fuel cell according to claim 1, wherein said jig comprises a pair of fixing roller sets, at least one of said fixing roller sets being provided with a force applying unit for applying said predetermined pressure required for said electrolyte membrane.
5. The method of fixing an electrolyte membrane of a fuel cell membrane electrode according to claim 4, wherein a film exit length L2 of the electrolyte membrane between the pair of fixing roller groups and a pitch L1 of the urging contact units of the pair of fixing roller groups satisfy the following relationship: l1 is not less than L2 is not less than L1 is 102%.
6. The method of fixing an electrolyte membrane of a membrane electrode assembly for a fuel cell according to claim 1, wherein said jig comprises a pair of fixing clamp plates provided with clamping units on adjacent plate surfaces thereof for providing said predetermined pressure required for said electrolyte membrane; the middle parts of the pair of fixing clamping plates are hollowed out.
7. The method of fixing an electrolyte membrane of a fuel cell membrane electrode according to claim 6, wherein the fixing clips are of a clip shape, and the clamping units are provided at four apexes of the fixing clips.
8. The fuel cell membrane electrode electrolyte membrane fixing method according to claim 6, wherein the fixing clip plate is in a shape of a clip, and the clamping unit is laid along an edge of the fixing clip plate.
9. The fuel cell membrane electrode electrolyte membrane fixing method according to claim 6, wherein the clamping unit is a magnetic clamp.
10. Use of a fuel cell membrane electrode electrolyte membrane fixation method, characterized in that the use comprises applying the fuel cell membrane electrode electrolyte membrane fixation method according to any one of claims 1 to 9 to spray coating of the electrolyte membrane.
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| CN209466661U (en) * | 2019-01-30 | 2019-10-08 | 河南信德塑业有限公司 | It is a kind of produce nylon membrane open clamp device |
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| JP2009029561A (en) * | 2007-07-26 | 2009-02-12 | U-Tec Kk | Film peeling method, and film peeling device |
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| CN113745565B (en) | 2023-03-21 |
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