CN115663211B - Gas diffusion layer and fuel cell - Google Patents
Gas diffusion layer and fuel cell Download PDFInfo
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- CN115663211B CN115663211B CN202211410702.8A CN202211410702A CN115663211B CN 115663211 B CN115663211 B CN 115663211B CN 202211410702 A CN202211410702 A CN 202211410702A CN 115663211 B CN115663211 B CN 115663211B
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- 238000009792 diffusion process Methods 0.000 title claims abstract description 82
- 239000000446 fuel Substances 0.000 title claims abstract description 37
- 229910052751 metal Inorganic materials 0.000 claims abstract description 191
- 239000002184 metal Substances 0.000 claims abstract description 191
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 239000003054 catalyst Substances 0.000 claims description 7
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 5
- 229910001256 stainless steel alloy Inorganic materials 0.000 claims description 5
- 229910003460 diamond Inorganic materials 0.000 claims description 4
- 239000010432 diamond Substances 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 68
- 239000011148 porous material Substances 0.000 description 15
- 229910052799 carbon Inorganic materials 0.000 description 8
- 238000003466 welding Methods 0.000 description 8
- 101001091610 Homo sapiens Krev interaction trapped protein 1 Proteins 0.000 description 7
- 102100035878 Krev interaction trapped protein 1 Human genes 0.000 description 7
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000012495 reaction gas Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000012209 glucono delta-lactone Nutrition 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Inert Electrodes (AREA)
Abstract
The present application relates to the technical field of fuel cells, and in particular, to a gas diffusion layer and a fuel cell. The gas diffusion layer comprises a metal felt layer and a metal mesh layer, when the gas diffusion layer is used in a unit cell of the fuel cell, the metal felt layer and the metal mesh layer are sequentially stacked between a CCM and a polar plate of the unit cell, the metal felt layer is positioned on one side close to the CCM and is attached to the CCM, the metal mesh layer is positioned between the polar plates, one side of the metal mesh layer is attached to the metal felt layer, and the other side of the metal mesh layer is attached to the polar plate, so that electric connection is formed among the metal felt layer, the metal mesh layer and the polar plate. Through using the metal felt to add the gas diffusion layer of metal mesh form, can make the gas diffusion layer have stronger mechanical stability, can not take place great compression deformation because of the pressure that the unit cell received when the assembly to have less dimensional change when making the unit cell assembly, and then the assembly of more being convenient for unit cell improves assembly efficiency.
Description
Technical Field
The present application relates to the technical field of fuel cells, and in particular, to a gas diffusion layer and a fuel cell.
Background
The unit cells of PEM (Polymer Electrolyte Membrane ) hydrogen fuel cells generally include a catalyst coated membrane (CCM, catalyst coated membrane) and anode and cathode plates disposed on both sides of the CCM, with gas diffusion layers (GDLs, gas Diffusion Layer) stacked between the CCM and the anode and cathode plates.
The conventional unit cells are generally stacked between the polar plate and the CCM by using carbon paper to form the GDL, but the GDL formed by stacking the carbon paper has poor mechanical stability and is easily compressed and deformed when being pressed, which also causes the unit cells to be easily changed in size due to the pressing when being assembled, thereby affecting the assembly of the unit cells and resulting in low assembly efficiency.
Disclosure of Invention
The application aims to provide a gas diffusion layer and a fuel cell, which are used for improving the mechanical stability of the gas diffusion layer to a certain extent and ensuring that the gas diffusion layer is not easy to deform under pressure.
The application provides a gas diffusion layer, which comprises a metal felt layer and a metal net layer;
the metal felt layer and the metal mesh layer are used for being sequentially stacked between the catalyst coating film of the fuel cell and the polar plate, and the metal mesh layer is positioned at one side close to the polar plate;
the metal felt layer is electrically connected with the metal mesh layer, and the metal mesh layer is used for being electrically connected with the polar plate.
Further, the metal mesh layer comprises a small-hole metal mesh and a large-hole metal mesh which are sequentially stacked, and the small-hole metal mesh is positioned at one side close to the metal felt layer.
Further, the small-hole metal net and the large-hole metal net are both formed with diamond-shaped meshes, and the diamond-shaped meshes of the small-hole metal net and the large-hole metal net are staggered by a preset angle.
Further, the small-hole metal net is provided with at least one layer, and when the small-hole metal net is multi-layer, the diamond-shaped meshes of the small-hole metal net of two adjacent layers are staggered by a preset angle;
and/or the macroporous metal mesh is provided with at least one layer, and when the macroporous metal mesh is multi-layer, the diamond-shaped meshes of the macroporous metal mesh of two adjacent layers have dislocation with a preset angle.
Further, two diagonal lines of the diamond-shaped mesh of the small-hole metal net are k1 and k2 respectively, wherein the size of k1 is 0.1mm-0.5mm, and the size of k2 is 0.3mm-0.8mm;
two diagonal lines of the diamond mesh of the macroporous metal mesh are s1 and s2 respectively, wherein the size of s1 is 2mm-4mm, and the size of s2 is 1mm-1.5mm.
Further, the metal felt layer, the metal mesh layer and the polar plate are in press fit connection through a laminating machine and are electrically connected;
or, the metal felt layer, the metal mesh layer and two adjacent electrode plates are riveted, welded or bonded by conductive adhesive to realize electric connection.
Further, the metal felt of the metal felt layer is made of stainless steel or titanium alloy; and/or the metal net of the metal net layer is made of stainless steel or titanium alloy;
the surface of the metal felt layer and/or the metal net of the metal net layer is sprayed with a plating layer with corrosion resistance and conductivity.
Further, the gas diffusion layer further includes a carbon powder microporous layer attached to a side of the metal felt layer facing the catalyst coated film.
The application also provides a fuel cell comprising an anode gas diffusion layer and a cathode gas diffusion layer;
the anode gas diffusion layer and/or the cathode gas diffusion layer is the gas diffusion layer described in any one of the above.
Further, the fuel cell is provided with electrode plates on both sides thereof, and the electrode plate on one side of the fuel cell provided with the gas diffusion layer is flat.
Compared with the prior art, the application has the beneficial effects that:
the gas diffusion layer provided by the application comprises a metal felt layer and a metal net layer, wherein the metal felt layer is a layered structure formed by metal felts and having a preset thickness, and the metal net layer is a layered structure formed by metal nets and having a preset back; when the metal mat layer and the metal net layer are stacked between the CCM and the polar plate of the unit cell in sequence in the unit cell for the fuel cell, the metal mat layer is positioned on one side close to the CCM and is attached to the CCM, the metal net layer is positioned between the polar plates, one side of the metal net layer is attached to the metal mat layer, and the other side of the metal net layer is attached to the polar plate, so that electric connection is formed among the metal mat layer, the metal net layer and the polar plate.
Compared with the traditional carbon paper type gas diffusion layer, the metal felt and metal mesh type gas diffusion layer is used, so that the gas diffusion layer has stronger mechanical stability, and can not be subjected to larger compression deformation due to the pressure applied to the unit cells during assembly, so that the unit cells have smaller dimensional change during assembly, the unit cells are more convenient to assemble, and the assembly efficiency is improved.
The application also provides a fuel cell comprising the gas diffusion layer, so that the fuel cell also has the beneficial effect of the gas diffusion layer.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of a structure of a gas diffusion layer for a cathode side of a fuel cell according to an embodiment of the present application;
fig. 2 is a schematic view of a structure of a gas diffusion layer for an anode side of a fuel cell according to an embodiment of the present application;
fig. 3 is a schematic view showing a structure of a gas diffusion layer according to an embodiment of the present application for an anode side and a cathode side of a fuel cell;
FIG. 4 is a schematic view of a metal felt layer of a gas diffusion layer according to an embodiment of the present application;
FIG. 5 is a schematic view of a porous metal mesh of a gas diffusion layer according to an embodiment of the present application;
FIG. 6 is an enlarged view of FIG. 5 at A;
FIG. 7 is a schematic diagram of a macroporous metal mesh of a gas diffusion layer according to an embodiment of the present application;
fig. 8 is an enlarged view at B in fig. 7.
Reference numerals:
1-CCM, 2-carbon powder microporous layer, 3-metal felt layer, 4-small hole metal net, 5-large hole metal net and 6-polar plate.
Detailed Description
The following description of the embodiments of the present application will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the application are shown.
The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application.
All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
A gas diffusion layer and a fuel cell according to some embodiments of the present application are described below with reference to fig. 1 to 8.
A first aspect of the present application provides a Gas Diffusion Layer (GDL) for use in a unit cell of a fuel cell; in the unit cell, the gas diffusion layer is used for being stacked between a Catalyst Coating Membrane (CCM) and a polar plate of the unit cell, the polar plate can be an anode plate or a cathode plate, the gas diffusion layer stacked between the anode side of the CCM and the anode plate is an anode GDL, and the gas diffusion layer stacked between the cathode side of the CCM and the cathode plate is a cathode GDL.
As shown in fig. 1, the gas diffusion layer of the present application comprises a metal felt layer 3, i.e., a layered structure formed of a metal felt and having a predetermined thickness, and a metal mesh layer, i.e., a layered structure formed of a metal mesh and having a predetermined rear; when the metal felt layer 3 and the metal mesh layer are stacked between the CCM1 and the polar plate 6 of the unit cell in sequence in the unit cell for the fuel cell, the metal felt layer 3 is positioned on one side close to the CCM1 and is attached to the CCM1, the metal mesh layer is positioned between the polar plates 6, one side of the metal mesh layer is attached to the metal felt layer 3, and the other side of the metal mesh layer is attached to the polar plate 6, so that electric connection is formed among the metal felt layer 3, the metal mesh layer and the polar plate 6.
Compared with the traditional carbon paper type gas diffusion layer, the metal felt and metal mesh type gas diffusion layer is used, so that the gas diffusion layer has stronger mechanical stability, and can not be subjected to larger compression deformation due to the pressure applied to the unit cells during assembly, so that the unit cells have smaller dimensional change during assembly, the unit cells are more convenient to assemble, and the assembly efficiency is improved.
In one embodiment of the present application, it is preferable that the metal mesh layer includes a small-pore metal mesh 4 having a small mesh and a large-pore metal mesh 5 having a large mesh, as shown in fig. 1 and 5 to 8, the small-pore metal mesh 4 and the large-pore metal mesh 5 being sequentially stacked, and the small-pore metal mesh 4 being located at a side close to the metal felt.
The metal felt is formed with smaller pore channels for gas circulation than the meshes of the small pore metal net 4, so that the gas diffusion layer forms a porosity gradient and a pore size gradient along the stacking direction through the metal felt, the small pore metal net 4 and the large pore metal net 5 which are sequentially stacked, thereby ensuring effective diffusion of the reaction gas of the unit cells.
In this embodiment, preferably, the porosity of the metal felt is between 30% and 70% as shown in fig. 4; further preferably, as shown in fig. 5 to 8, the small-pore metal mesh 4 and the large-pore metal mesh 5 are each formed with diamond-shaped mesh, and the diamond-shaped mesh of the small-pore metal mesh 4 has two diagonal lines k1 and k2, respectively, wherein the size of k1 is 0.1mm to 0.5mm; the diamond-shaped mesh of the macroporous metal mesh 5 also has two diagonal lines s1 and s2, respectively, where s1d has a size of 2mm-4mm and s2 has a size of 1mm-1.5mm.
In this embodiment, it is preferable that, for the small-hole metal net 4 and the large-hole metal net 5 to be superimposed together, the small-hole metal net 4 and the diamond-shaped mesh of the large-hole metal net 5 are offset by a predetermined angle when superimposed, that is, the diagonal lines of the diamond-shaped mesh of the small-hole metal net 4 and the large-hole metal net 5 are included by a predetermined angle when they are arranged.
Preferably, the angle between the diagonals of the diamond-shaped meshes of the small-pore metal mesh 4 and the large-pore metal mesh 5 is 0-90 degrees.
The small-hole metal net 4 and the large-hole metal net 5 are arranged in a staggered manner, so that the mechanical stability of the molecular diffusion layer can be improved to a certain extent, the molecular diffusion layer is not easy to deform, and the flow resistance of the reaction gas flowing through the gas diffusion layer can be regulated to a certain extent; the dislocation angle between the diamond-shaped meshes of the small-hole metal net 4 and the large-hole metal net 5 can be adjusted according to the required gas flow resistance.
In this embodiment, it is preferable that the small-hole metal net 4 is provided with one or more layers, and when the small-hole metal net 4 is provided with a plurality of layers, diamond-shaped meshes of two adjacent layers of small-hole metal nets 4 are also arranged in a dislocation of a predetermined angle.
Preferably, the macroporous metal mesh 5 may also be provided with one or more layers, and when the macroporous metal mesh 5 is provided with multiple layers, the diamond-shaped mesh openings of two adjacent layers of macroporous metal mesh 5 are also arranged at a predetermined angle.
In one embodiment of the present application, the metal felt of the metal felt layer 3, the metal mesh of the metal mesh layer, and the electrode plate 6 may be preferably made of stainless steel or titanium alloy, such as 316L stainless steel, titanium alloy TA1 or TA2, and the like.
Further preferably, the metal felt of the metal felt layer 3 and the surface of the metal mesh layer may be plated with a plating having corrosion resistance and electrical conductivity.
In one embodiment of the present application, the metal felt layer 3, the metal mesh layer and the polar plate 6 are preferably directly connected by pressing by a laminating machine when assembled and connected, so that the three are connected together and form an electric connection; meanwhile, the metal felt layer 3 and the metal net layer and the metal net of the metal net layer are slightly embedded, so that the conductivity of the polar plate tool assembly formed after connection is improved.
Preferably, the metal felt layer 3, the metal mesh layer and the polar plate 6 can also adopt a connection form of riveting, bonding by using conductive adhesive or welding so as to connect the three together and form an electric connection; and also can apply certain pressure to the frock after the connection through the laminator after accomplishing the connection and press fit to be leveled for there is slight gomphosis between metal felt layer 3 and the metal mesh layer, and between the metal mesh of metal mesh layer, in order to improve the conductivity of polar plate frock subassembly that forms after the connection.
Further preferably, the metal felt layer 3, the metal mesh layer and the polar plate 6 are connected by welding, and various welding modes can be adopted, such as diffusion welding, resistance spot welding, laser welding and the like; the welding mode is equivalent to forming two layers to be welded into a whole, namely, no contact surface is formed between the two layers; therefore, the number of layers of the contact surface of the polar plate tool assembly is reduced in a welding connection mode, and the internal resistance of the polar plate tool assembly is lower.
In one embodiment of the present application, the gas diffusion layer preferably further comprises a carbon powder microporous layer 2, and the carbon powder microporous layer 2 is attached to the side of the metal felt layer 3 facing the CCM1, so as to increase the support between the CCM1 and the gas diffusion layer, protect the CCM1 from damage, and reduce the contact resistance between the metal felt layer 3 and the CCM1 to some extent.
A second aspect of the application provides a fuel cell comprising an anode gas diffusion layer and a cathode gas diffusion layer, at least one of which is the gas diffusion layer of any of the embodiments described above.
In this embodiment, the fuel cell includes a gas diffusion layer, so the fuel cell has all the advantages of the gas diffusion layer, which will not be described in detail herein.
In a fuel cell, specifically, a unit cell of the fuel cell, as shown in fig. 1, the cathode gas diffusion layer of the fuel cell may be a gas diffusion layer of any of the above embodiments, and the anode gas diffusion layer may be a gas diffusion layer of a conventional type.
Alternatively, as shown in fig. 2, the anode gas diffusion layer of the fuel cell employs the gas diffusion layer of any of the above embodiments, and the cathode gas diffusion layer employs a conventional form of gas diffusion layer.
Alternatively, as shown in fig. 3, the anode gas diffusion layer and the cathode gas diffusion layer of the fuel cell each employ the gas diffusion layer of any of the above embodiments.
In this embodiment, the fuel cell includes the gas diffusion layer of any of the above embodiments, so the fuel cell has all the advantages of the gas diffusion layer, which are not described in detail herein.
In this embodiment, preferably, when the anode GDL or the cathode GDL of the unit cell employs the gas diffusion layer of the present application, since the metal felt of the metal felt layer and the metal mesh of the metal mesh layer are formed with passages sufficient for gas to flow therethrough as compared to conventional carbon paper, the corresponding anode plate or cathode plate may be provided in a flat plate shape. The gas diffusion layer in the traditional carbon paper form is adopted, and the polar plate needs a channel which can be used for gas circulation at the bending part, so that the structure and the processing of the polar plate are relatively complex.
In this embodiment, preferably, when the anode GDL or the cathode GDL of the unit cell employs the gas diffusion layer of the present application, since the metal felt of the metal felt layer and the metal mesh of the metal mesh layer are formed with passages sufficient for gas to flow therethrough as compared to conventional carbon paper, the corresponding anode plate or cathode plate may be provided in a flat plate shape. The gas diffusion layer in the traditional carbon paper form is adopted, and the polar plate needs a channel which can be used for gas circulation at the bending part, so that the structure and the processing of the polar plate are relatively complex.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (6)
1. A gas diffusion layer, characterized by comprising a metal felt layer and a metal mesh layer;
the metal felt layer and the metal mesh layer are used for being sequentially stacked between the catalyst coating film of the fuel cell and the polar plate, and the metal mesh layer is positioned at one side close to the polar plate;
the metal felt layer is electrically connected with the metal mesh layer, and the metal mesh layer is used for being electrically connected with the polar plate;
the metal mesh layer comprises a small-hole metal mesh and a large-hole metal mesh which are sequentially stacked, and the small-hole metal mesh is positioned at one side close to the metal felt layer;
the small-hole metal net and the large-hole metal net are both formed with diamond-shaped meshes, and the diamond-shaped meshes of the small-hole metal net and the large-hole metal net are staggered at a preset angle;
the small-hole metal net is provided with at least one layer, and when the small-hole metal net is multi-layer, the diamond meshes of the small-hole metal net of two adjacent layers are staggered by a preset angle;
and/or, the macroporous metal mesh is provided with at least one layer, and when the macroporous metal mesh is multi-layer, the diamond-shaped meshes of the macroporous metal mesh of two adjacent layers have dislocation with a preset angle;
two diagonal lines of the diamond mesh of the small-hole metal net are k1 and k2 respectively, wherein the size of k1 is 0.1mm-0.5mm, and the size of k2 is 0.3mm-0.8mm;
two diagonal lines of the diamond mesh of the macroporous metal mesh are s1 and s2 respectively, wherein the size of s1 is 2mm-4mm, and the size of s2 is 1mm-1.5mm.
2. The gas diffusion layer of claim 1, wherein the metal felt layer, the metal mesh layer, and the electrode plate are press-fit connected by a laminator and electrically connected;
or, the metal felt layer, the metal mesh layer and two adjacent electrode plates are riveted, welded or bonded by conductive adhesive to realize electric connection.
3. The gas diffusion layer according to claim 1, wherein the metal felt of the metal felt layer is made of stainless steel or titanium alloy; and/or the metal net of the metal net layer is made of stainless steel or titanium alloy;
the surface of the metal felt layer and/or the metal net of the metal net layer is sprayed with a plating layer with corrosion resistance and conductivity.
4. The gas diffusion layer of claim 1, further comprising a carbon powder microporous layer attached to a side of the metal felt layer for facing the catalyst coated membrane.
5. A fuel cell comprising an anode gas diffusion layer and a cathode gas diffusion layer;
the anode gas diffusion layer and/or the cathode gas diffusion layer is the gas diffusion layer according to any one of claims 1 to 4.
6. The fuel cell according to claim 5, wherein the fuel cell is provided with electrode plates on both sides thereof, respectively, and the electrode plate on the side of the fuel cell provided with the gas diffusion layer according to any one of claims 1 to 4 is flat.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211410702.8A CN115663211B (en) | 2022-11-11 | 2022-11-11 | Gas diffusion layer and fuel cell |
| PCT/CN2023/120317 WO2024098971A1 (en) | 2022-11-11 | 2023-09-21 | Gas diffusion layer and fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211410702.8A CN115663211B (en) | 2022-11-11 | 2022-11-11 | Gas diffusion layer and fuel cell |
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| CN115663211A CN115663211A (en) | 2023-01-31 |
| CN115663211B true CN115663211B (en) | 2023-09-29 |
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| CN115663211B (en) * | 2022-11-11 | 2023-09-29 | 上海氢晨新能源科技有限公司 | Gas diffusion layer and fuel cell |
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| CN115663211B (en) * | 2022-11-11 | 2023-09-29 | 上海氢晨新能源科技有限公司 | Gas diffusion layer and fuel cell |
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| CN115663211A (en) | 2023-01-31 |
| WO2024098971A1 (en) | 2024-05-16 |
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