CN110841869A - Method for coating proton exchange membrane of fuel cell and coating device thereof - Google Patents
Method for coating proton exchange membrane of fuel cell and coating device thereof Download PDFInfo
- Publication number
- CN110841869A CN110841869A CN201911076131.7A CN201911076131A CN110841869A CN 110841869 A CN110841869 A CN 110841869A CN 201911076131 A CN201911076131 A CN 201911076131A CN 110841869 A CN110841869 A CN 110841869A
- Authority
- CN
- China
- Prior art keywords
- coating
- expandable element
- exchange membrane
- proton exchange
- fuel cell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 142
- 239000011248 coating agent Substances 0.000 title claims abstract description 137
- 239000012528 membrane Substances 0.000 title claims abstract description 29
- 239000000446 fuel Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 54
- 239000012530 fluid Substances 0.000 claims abstract description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000741 silica gel Substances 0.000 claims description 6
- 229910002027 silica gel Inorganic materials 0.000 claims description 6
- 239000010720 hydraulic oil Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000010808 liquid waste Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 10
- 239000003054 catalyst Substances 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000007755 gap coating Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000010023 transfer printing Methods 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 239000003014 ion exchange membrane Substances 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0254—Coating heads with slot-shaped outlet
- B05C5/0258—Coating heads with slot-shaped outlet flow controlled, e.g. by a valve
-
- 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
- H01M8/1004—Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Fuel Cell (AREA)
Abstract
A method for coating a proton exchange membrane of a fuel cell and a coating device thereof, wherein the method comprises the steps of arranging at least one expandable element in an inner cavity of a slot coating die head for containing a coating liquid, communicating a cylinder body positioned outside the slot coating die head with the expandable element, and expanding the expandable element when the cylinder body presses fluid into the expandable element so as to rapidly extrude the coating liquid; when the cylinder sucks the fluid out of the expandable member, the expandable member is contracted, thereby contracting the coating liquid from the coating port of the slot coating die. The invention can solve the problem of coating liquid waste before and after the coating start and stop point and achieve the aim of realizing clearance coating.
Description
Technical Field
The invention belongs to the technical field of coating machine accessories, and particularly relates to a method and a device for coating a proton exchange membrane of a fuel cell.
Background
The membrane electrode is the core component of the fuel cell, is the place where the electrochemical reaction in the cell occurs, and consists of an ion exchange membrane, a catalyst layer and a gas diffusion layer. The membrane electrode structure comprises a first-generation gas diffusion electrode, a second-generation CCM type electrode, a third-generation thin-layer ordered structure electrode and the like according to different preparation processes of the catalyst layer, and the second-generation CCM type membrane electrode is still widely applied at present. The preparation method of the CCM type electrode comprises a transfer printing method and a direct coating method, wherein the transfer printing method comprises the steps of spraying/printing the slurry on other media and then transferring the slurry on a proton exchange membrane to form a catalyst layer; the direct spray coating method is to mix and prepare a catalyst and ion exchange resin to form slurry, and to coat the slurry on a proton exchange membrane to form a catalyst layer.
In the case of the transfer method, although the surface of the transfer film is very smooth, there is still a certain adhesion between the catalytic layer and the transfer film, which may result in that part of the catalytic layer remains on the transfer film after transfer and thus complete transfer cannot be successfully performed. In addition, due to the problems of non-uniform preparation of the catalyst layer, non-uniform hot-pressing temperature and pressure, non-uniform environmental temperature and humidity and the like, the catalyst layer cannot be uniformly transferred to the proton exchange membrane, and the failure of CCM preparation is caused. The transfer method is gradually being replaced by the direct coating method.
The direct coating method is more efficient than the transfer method. But it is difficult to accurately achieve gap coating.
Slit coating is one of the most commonly used apparatus for the direct coating process. Slit coating is a coating technique in which a coating liquid is extruded along a die gap and transferred to a moving substrate under a certain pressure, and has the characteristics of high coating speed, good coating uniformity, wide coating window and the like.
Since a cavity for the coating liquid of the apparatus is present in the coating die in the slot coating, the supply pump needs to be operated for a certain period of time at the start of the coating until the coating liquid fills the cavity in the coating die before the normal coating can be performed. Similarly, when the coating is finished, the coating liquid in the cavity can continuously flow out. Therefore, in the slit coating process, a certain amount of coating liquid is wasted before and after the starting point, and the coating liquid on the two sides of the proton exchange membrane contains expensive noble metal platinum, so that the price of the proton exchange membrane is greatly influenced even if little waste is caused. In the industry, how to effectively control the coating amount of the coating start point and the coating stop point when coating both sides of the proton exchange membrane of the fuel cell so as to reduce the waste of the coating liquid and reduce the cost of the proton exchange membrane is a problem to be solved urgently.
Disclosure of Invention
The invention aims to provide a method for coating a proton exchange membrane of a fuel cell and a coating device thereof, which are used for solving the problem of waste before and after the start and stop point of coating and realizing clearance coating.
In order to achieve the above object, the present invention provides a method for coating a proton exchange membrane for a fuel cell, comprising providing at least one expandable member in an inner cavity of a slot coating die for receiving a coating liquid, communicating with the expandable member a cylinder located outside the slot coating die, the expandable member being expanded when the cylinder presses a fluid into the expandable member, thereby rapidly extruding the coating liquid; when the cylinder sucks the fluid out of the expandable member, the expandable member is contracted, thereby contracting the coating liquid from the coating port of the slot coating die.
As an improvement to the invention, a switch is provided between the cylinder and the inflatable element.
As a refinement to the invention, the inflatable element is a hose.
As an improvement to the present invention, the hose is a silicone hose or a rubber hose.
As a refinement of the invention, the fluid is a gas or a liquid.
As an improvement to the present invention, the gas is air and the liquid is water or hydraulic oil.
The invention also provides a coating device for coating the proton exchange membrane of the fuel cell, which comprises a slot coating die head, wherein at least one expandable element is arranged in an inner cavity of the slot coating die head for containing the coating liquid, the expandable element is communicated with a cylinder body positioned outside the slot coating die head, and when the cylinder body presses fluid into the expandable element, the expandable element is expanded, so that the coating liquid is extruded rapidly; when the cylinder sucks the fluid out of the expandable member, the expandable member is contracted, thereby contracting the coating liquid from the coating port of the slot coating die.
According to the invention, at least one expandable element is arranged in the inner cavity of the slot coating die head for containing the coating liquid, the expandable element is communicated with the cylinder body positioned outside the slot coating die head, and when the cylinder body presses fluid into the expandable element, the expandable element is expanded, so that the coating liquid is extruded rapidly; when the cylinder sucks the fluid out of the expandable element, the expandable element is contracted, so that the coating liquid is contracted from the coating opening of the slit coating die head, the problem of waste of the coating liquid before and after the coating start point can be solved, and the aim of realizing gap coating is fulfilled.
Drawings
Fig. 1 is a schematic longitudinal sectional structure of an embodiment of the present invention.
FIG. 2 is a schematic side sectional view of an embodiment of the present invention.
Detailed Description
Referring to fig. 1 and 2, the present invention provides a method for coating a proton exchange membrane for a fuel cell, in which at least one expandable element 2 (two expandable elements 2 in the present embodiment, obviously, the expandable element 2 may be one, or any number of two or more) is disposed in an inner cavity 11 for receiving a coating liquid of a slot coating die 1, a cylinder 3 located outside the slot coating die 1 is communicated with the expandable element 2, and when the cylinder 3 presses a fluid into the expandable element 2, the expandable element 2 is expanded, so as to rapidly extrude the coating liquid; when the cylinder 3 sucks the fluid from the expandable member 2, the expandable member 2 is contracted, thereby contracting the coating liquid from the coating port 12 of the slot coating die 1. The cylinder body 3 in the invention can be an air cylinder or an oil cylinder, and is selected according to different fluids.
When the number of the expandable elements 2 is more than two, the inner diameters of each expandable element 2 can be equal or unequal, and the arrangement of the plurality of expandable elements 2 has the greatest advantage that one or more expandable elements can be selected to expand or one or more expandable elements can be selected to contract according to the output quantity requirement of the coating liquid, so that the range of adjusting the output quantity of the coating liquid can be expanded, and the flexible adjustment of the output quantity of the coating liquid is more facilitated.
Preferably, the cylinder 3 and the expandable elements 2 are provided with switches 31, and the number of expandable elements 2 can be controlled as desired by separately providing the switches 31.
Preferably, the expandable element 2 is a hose. The hose can be a silica gel hose or a rubber hose, of course, different hoses can be selected according to different properties of the coating liquid, the silica gel hose can be suitable for most of coating liquids with different properties, and the rubber hose can be selected for aqueous coating liquid, so that the cost is reduced.
The fluid in the present invention is a gas or a liquid. Further, the gas may be air, or other elemental gases, such as nitrogen; the liquid may be water or hydraulic oil, etc.
Referring to fig. 1 and 2 again, fig. 1 and 2 disclose a coating apparatus for coating a proton exchange membrane of a fuel cell, which includes a slot coating die 1, at least one expandable element 2 (two expandable elements 2 are provided in this embodiment, obviously, one expandable element 2 may be provided, or any number of two or more expandable elements 2 are provided) is provided in an inner cavity 11 of the slot coating die 1 for accommodating a coating liquid, the expandable element 2 is communicated with a cylinder 3 located outside the slot coating die 1, and when the cylinder 3 presses a fluid into the expandable element 2, the expandable element 2 is expanded, so as to rapidly extrude the coating liquid; when the cylinder 3 sucks the fluid from the expandable member 2, the expandable member 2 is contracted, thereby contracting the coating liquid from the coating port 12 of the slot coating die 1. The cylinder body 3 in the invention can be an air cylinder or an oil cylinder, and is selected according to different fluids.
When the number of the expandable elements 2 is more than two, the inner diameters of each expandable element 2 can be equal or unequal, and the arrangement of the plurality of expandable elements 2 has the greatest advantage that one or more expandable elements can be selected to expand or one or more expandable elements can be selected to contract according to the output quantity requirement of the coating liquid, so that the range of adjusting the output quantity of the coating liquid can be expanded, and the flexible adjustment of the output quantity of the coating liquid is more facilitated.
Preferably, the cylinder 3 and the expandable elements 2 are provided with switches 31, and the number of expandable elements 2 can be controlled as desired by separately providing the switches 31.
Preferably, the expandable element 2 is a hose. The hose can be a silica gel hose or a rubber hose, of course, different hoses can be selected according to different properties of the coating liquid, the silica gel hose can be suitable for most of coating liquids with different properties, and the rubber hose can be selected for aqueous coating liquid, so that the cost is reduced.
The fluid in the present invention is a gas or a liquid. Further, the gas may be air, or other elemental gases, such as nitrogen; the liquid may be water or hydraulic oil, etc.
When the slot coating die head is manufactured specifically, holes can be drilled on one side or two sides of the slot coating die head 1 and penetrate through the hose, one end of the hose is closed, and the other end of the hose is connected with the cylinder body 3.
When in use, the pressure in the hose can be changed to change the coating state of the coating liquid and ensure that the coating liquid is not wasted.
Claims (10)
1. A method for coating a proton exchange membrane for a fuel cell, comprising: arranging at least one expandable element (2) in an inner cavity (11) of a slot coating die head (1) for containing a coating liquid, wherein a cylinder body (3) positioned outside the slot coating die head (1) is communicated with the expandable element (2), and when the cylinder body (3) presses a fluid into the expandable element (2), the expandable element (2) is expanded, so that the coating liquid is extruded rapidly; when the cylinder (3) sucks the fluid from the expandable member (2), the expandable member (2) is contracted, thereby contracting the coating liquid from the coating port (12) of the slot coating die (1).
2. The method for fuel cell proton exchange membrane coating of claim 1, wherein: the cylinder body (3) and the expandable element (2) are provided with switches.
3. The method for fuel cell proton exchange membrane coating according to claim 1 or 2, wherein: the expandable element (2) is a hose.
4. The method for fuel cell proton exchange membrane coating of claim 3, wherein: the hose is a silica gel hose or a rubber hose.
5. The method for fuel cell proton exchange membrane coating according to claim 1 or 2, wherein: the fluid is a gas or a liquid.
6. The method for fuel cell proton exchange membrane coating of claim 5, wherein: the gas is air and the liquid is water or hydraulic oil.
7. A coating device for coating a proton exchange membrane of a fuel cell, characterized in that: the slot coating die head comprises a slot coating die head (1), at least one expandable element (2) is arranged in an inner cavity (11) of the slot coating die head (1) for containing a coating liquid, the expandable element (2) is communicated with a cylinder body (3) positioned outside the slot coating die head (1), and when the cylinder body (3) presses a fluid into the expandable element (2), the expandable element (2) is expanded, so that the coating liquid is extruded rapidly; when the cylinder (3) sucks the fluid from the expandable member (2), the expandable member (2) is contracted, thereby contracting the coating liquid from the coating port (12) of the slot coating die (1).
8. The coating apparatus for fuel cell proton exchange membrane coating of claim 7, wherein: the cylinder body (3) and the expandable element (2) are provided with switches.
9. The coating apparatus for fuel cell proton exchange membrane coating of claim 7 or 8, wherein: the expandable element (2) is a hose.
10. The coating apparatus for fuel cell proton exchange membrane coating of claim 9, wherein: the hose is a silica gel hose or a rubber hose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911076131.7A CN110841869A (en) | 2019-11-06 | 2019-11-06 | Method for coating proton exchange membrane of fuel cell and coating device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911076131.7A CN110841869A (en) | 2019-11-06 | 2019-11-06 | Method for coating proton exchange membrane of fuel cell and coating device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110841869A true CN110841869A (en) | 2020-02-28 |
Family
ID=69598996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911076131.7A Pending CN110841869A (en) | 2019-11-06 | 2019-11-06 | Method for coating proton exchange membrane of fuel cell and coating device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110841869A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06226180A (en) * | 1993-01-30 | 1994-08-16 | Sumitomo Metal Ind Ltd | Coating equipment |
| JPH11221509A (en) * | 1998-02-09 | 1999-08-17 | Sharp Corp | Coating device |
| US20040080075A1 (en) * | 2002-10-23 | 2004-04-29 | 3M Innovative Properties Company | Coating die with expansible chamber device |
| CN101462100A (en) * | 2007-12-21 | 2009-06-24 | 中外炉工业株式会社 | Coating device |
| TW201328787A (en) * | 2011-12-01 | 2013-07-16 | Tazmo Co Ltd | Coating device and coating method |
| CN103909043A (en) * | 2012-12-28 | 2014-07-09 | 现代自动车株式会社 | Slot Die Coating Apparatus And Method For Manufacturing Membrane Electrode Assembly |
-
2019
- 2019-11-06 CN CN201911076131.7A patent/CN110841869A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06226180A (en) * | 1993-01-30 | 1994-08-16 | Sumitomo Metal Ind Ltd | Coating equipment |
| JPH11221509A (en) * | 1998-02-09 | 1999-08-17 | Sharp Corp | Coating device |
| US20040080075A1 (en) * | 2002-10-23 | 2004-04-29 | 3M Innovative Properties Company | Coating die with expansible chamber device |
| CN1688395A (en) * | 2002-10-23 | 2005-10-26 | 3M创新有限公司 | Coating die with expansible chamber device |
| CN101462100A (en) * | 2007-12-21 | 2009-06-24 | 中外炉工业株式会社 | Coating device |
| TW201328787A (en) * | 2011-12-01 | 2013-07-16 | Tazmo Co Ltd | Coating device and coating method |
| CN103909043A (en) * | 2012-12-28 | 2014-07-09 | 现代自动车株式会社 | Slot Die Coating Apparatus And Method For Manufacturing Membrane Electrode Assembly |
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Application publication date: 20200228 |
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