CN113991129A - Microporous layer of gas diffusion layer of proton exchange membrane fuel cell and preparation method thereof - Google Patents
Microporous layer of gas diffusion layer of proton exchange membrane fuel cell and preparation method thereof Download PDFInfo
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- 238000009792 diffusion process Methods 0.000 title claims abstract description 36
- 239000000446 fuel Substances 0.000 title claims abstract description 22
- 239000012528 membrane Substances 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 29
- 238000000576 coating method Methods 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000002002 slurry Substances 0.000 claims abstract description 22
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 21
- 239000011248 coating agent Substances 0.000 claims abstract description 19
- 238000001035 drying Methods 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 230000002940 repellent Effects 0.000 claims abstract description 13
- 239000005871 repellent Substances 0.000 claims abstract description 13
- 238000005303 weighing Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000002791 soaking Methods 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 239000006258 conductive agent Substances 0.000 claims abstract description 5
- 239000002904 solvent Substances 0.000 claims abstract description 5
- 239000004094 surface-active agent Substances 0.000 claims abstract description 5
- 239000000758 substrate Substances 0.000 claims abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 45
- 229910052799 carbon Inorganic materials 0.000 claims description 35
- -1 polytetrafluoroethylene Polymers 0.000 claims description 22
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 18
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 18
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- 239000002033 PVDF binder Substances 0.000 claims description 6
- 239000004743 Polypropylene Substances 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 6
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 6
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 4
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 3
- 239000002041 carbon nanotube Substances 0.000 claims description 3
- 238000007763 reverse roll coating Methods 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- 239000004917 carbon fiber Substances 0.000 claims description 2
- 239000003575 carbonaceous material Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000002736 nonionic surfactant Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 31
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 239000012466 permeate Substances 0.000 abstract description 4
- 239000012495 reaction gas Substances 0.000 abstract description 3
- 238000007761 roller coating Methods 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract 1
- 239000000839 emulsion Substances 0.000 description 12
- 239000013504 Triton X-100 Substances 0.000 description 6
- 229920004890 Triton X-100 Polymers 0.000 description 6
- 239000008367 deionised water Substances 0.000 description 6
- 229910021641 deionized water Inorganic materials 0.000 description 6
- 239000006229 carbon black Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 238000001132 ultrasonic dispersion Methods 0.000 description 5
- 230000010287 polarization Effects 0.000 description 3
- 238000007650 screen-printing Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000006230 acetylene black Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
- H01M4/8803—Supports for the deposition of the catalytic active composition
- H01M4/8807—Gas diffusion layers
-
- 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
- H01M4/8663—Selection of inactive substances as ingredients for catalytic active masses, e.g. binders, fillers
- H01M4/8673—Electrically conductive fillers
-
- 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
Abstract
The invention belongs to the technical field of fuel cells, and particularly relates to a microporous layer of a gas diffusion layer of a proton exchange membrane fuel cell and a preparation method thereof. The preparation method comprises the following steps: soaking the base material in a water repellent for 0.5-5min, then placing the base material in an oven at 50-120 ℃ for drying for 5-30min, weighing, repeating the operation for many times until the content of the water repellent in the base material is 5% -10%, then roasting the base material in a muffle furnace at 200-300 ℃ for 10-120min, and then heating to 350-400 ℃ for roasting for 10-120 min; the preparation method comprises the steps of taking a conductive agent, a water repellent, a surfactant and a solvent as raw materials, mechanically stirring and ultrasonically dispersing until uniform microporous layer slurry is formed, coating the microporous layer slurry on a substrate subjected to hydrophobic treatment by adopting a roll coating method, and then drying and roasting to form the gas diffusion layer. The invention adopts a roller coating method, avoids the problems that the slurry of the microporous layer permeates into the base material to block the macropores of the base material and block the transmission channel and the drainage channel of the reaction gas, enhances the gas transmission capability and the drainage capability and improves the battery performance.
Description
Technical Field
The invention belongs to the technical field of fuel cells, and particularly relates to a microporous layer of a gas diffusion layer of a proton exchange membrane fuel cell and a preparation method thereof.
Background
The current methods for preparing the microporous layer mainly include screen printing, spraying, and blade coating. The screen printing method leaves a grid of the screen on the surface of the microporous layer, and the trace of the screen lines is usually the starting position of the degradation of the microporous layer, which makes the microporous layer easily fall off and reduces the durability of the microporous layer. The microporous layer prepared by the spraying method is only suitable for small-area preparation, and large-scale production cannot be realized. The blade coating method includes blade coating and wire bar coating. Slurry permeates into macropores of a base material when the microporous layer is prepared by a blade coating method, the macropores of the base material are blocked, gas transmission and water discharge are influenced, and thus electrodes are flooded with water.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a microporous layer of a gas diffusion layer of a proton exchange membrane fuel cell and a preparation method thereof. The preparation method of the microporous layer of the gas diffusion layer adopts a roller coating method, avoids the problems that slurry of the microporous layer permeates into the base material to block the macropores of the base material and block the transmission channel and the drainage channel of reaction gas, enhances the gas transmission capacity and the drainage capacity and improves the performance of the battery.
In order to achieve the technical purpose, the embodiment of the invention adopts the technical scheme that:
in a first aspect, an embodiment of the present invention provides a method for preparing a microporous layer of a gas diffusion layer of a proton exchange membrane fuel cell, including the following steps:
(1) hydrophobic treatment of the base material: soaking the base material in a water repellent for 0.5-5min, then placing the base material in an oven at 50-120 ℃ for drying for 5-30min, weighing, repeating the operation for many times until the content of the water repellent in the base material is 5% -10%, then roasting the base material in a muffle furnace at 200-300 ℃ for 10-120min, and then heating to 350-400 ℃ for roasting for 10-120 min;
(2) mixing a conductive agent, a water repellent, a surfactant and a solvent together, mechanically stirring and ultrasonically dispersing until uniform microporous layer slurry is formed, coating the microporous layer slurry on the substrate subjected to the hydrophobic treatment in the step (1) by adopting a roll coating method, drying in a drying oven at 50-120 ℃ for 5-30min, roasting in a muffle furnace at 200-300 ℃ for 10-120min, and then heating to 350-400 ℃ for 10-120min to form the gas diffusion layer.
Further, the water repellent in the step (1) and the step (2) is one of polytetrafluoroethylene, polyvinylidene fluoride and polypropylene.
Further, the base material in the step (1) is carbon paper or carbon cloth.
Further, the conductive agent in step (2) is a carbon material comprising one or more of activated carbon, graphitized carbon, carbon nanotubes, carbon fibers, and graphite powder.
Further, the surfactant in the step (2) is a nonionic surfactant.
Further, the solvent in the step (2) is one or a mixture of more of water, ethylene glycol, isopropanol, n-propanol and ethanol.
Further, the roll coating in the step (2) is reverse roll coating or forward roll coating.
In a second aspect, the embodiment of the invention provides a microporous layer of a gas diffusion layer of a proton exchange membrane fuel cell, which is prepared by the preparation method, wherein the thickness of the microporous layer of the gas diffusion layer is 10-50 μm, and the content of a water repellent in the microporous layer is 10% -60%.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
1) the gas diffusion layer prepared by the preparation method has the advantages of uniform pore structure, good conductivity and uniform and flat surface.
2) The preparation method of the microporous layer of the gas diffusion layer adopts a roller coating method, avoids the problems that slurry of the microporous layer permeates into the base material to block the macropores of the base material and block the transmission channel and the drainage channel of reaction gas, enhances the gas transmission capacity and the drainage capacity and improves the performance of the battery.
3) The roll coating method of the present invention is roll-to-roll coating, can be used for continuous coating, and can be applied to mass production.
Drawings
FIG. 1 is a schematic view of a clockwise roll coating of the present invention.
FIG. 2 is a schematic view of reverse roll coating according to the present invention.
Fig. 3 is a polarization curve of the assembly of the gas diffusion layers prepared in example 1 and comparative example 1 into a single cell.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
A preparation method of a microporous layer of a gas diffusion layer of a proton exchange membrane fuel cell comprises the following steps:
(1) hydrophobic treatment of the base material: soaking carbon paper in polytetrafluoroethylene emulsion, drying in a 70 ℃ oven for 30min, weighing, repeating the above operations for multiple times, weighing until the content of polytetrafluoroethylene in the carbon paper is 5%, roasting in a muffle furnace at 290 ℃ for 30min, and heating to 350 ℃ for 30 min;
(2) mixing 200g of deionized water, 4g of Triton X-100, 20g of XC-72 carbon black and 8.3g of polytetrafluoroethylene emulsion with the mass fraction of 60%, mechanically stirring for 2h, performing ultrasonic dispersion until uniform and consistent slurry is formed, coating the slurry on hydrophobic carbon paper by adopting a reverse roll, drying the coated carbon paper in a 70 ℃ oven for 30min, roasting the coated carbon paper in a 290 ℃ muffle furnace for 30min, and heating to 350 ℃ for roasting for 30min to obtain a microporous layer of the gas diffusion layer, wherein the mass content of the polytetrafluoroethylene in the microporous layer is 20%, and the thickness of the microporous layer is 20 mu m.
Example 2
A preparation method of a microporous layer of a gas diffusion layer of a proton exchange membrane fuel cell comprises the following steps:
(1) hydrophobic treatment of the base material: soaking carbon paper with polyvinylidene fluoride emulsion, drying in a 120 ℃ oven for 5min, weighing, repeating the above operations for multiple times, weighing until the content of polyvinylidene fluoride in the carbon paper is 7%, roasting in a muffle furnace at 290 ℃ for 30min, and heating to 350 ℃ for 30 min;
(2) mixing 200g of deionized water, 4g of Triton X-100, 20g of XC-72 carbon black and 8.3g of polyvinylidene fluoride emulsion with the mass fraction of 60%, mechanically stirring for 2h, performing ultrasonic dispersion until uniform and consistent slurry is formed, coating the slurry on hydrophobic carbon paper by adopting a clockwise roller, drying the coated carbon paper in a 120 ℃ oven for 30min, roasting the carbon paper in a 290 ℃ muffle furnace for 30min, and heating to 350 ℃ for 30min to obtain a microporous layer of the gas diffusion layer, wherein the mass content of polyvinylidene fluoride in the microporous layer is 30%, and the thickness of the microporous layer is 20 mu m.
Example 3
A preparation method of a microporous layer of a gas diffusion layer of a proton exchange membrane fuel cell comprises the following steps:
(1) hydrophobic treatment of the base material: soaking the carbon cloth in polytetrafluoroethylene emulsion, drying in a 70 ℃ oven for 0.5h, weighing, repeating the above operations for multiple times, weighing until the content of polytetrafluoroethylene in the carbon cloth is 5%, roasting in a muffle furnace at 290 ℃ for 30min, and heating to 350 ℃ for 30 min;
(2) mixing 100g of deionized water, 100g of n-propanol, 4g of Triton X-100, 10g of XC-72 carbon black, 10g of carbon nano tubes and 14.3g of polytetrafluoroethylene emulsion with the mass fraction of 60%, mechanically stirring for 2h, then performing ultrasonic dispersion until uniform and consistent slurry is formed, coating the slurry on hydrophobic carbon paper by adopting a reverse roll, drying the hydrophobic carbon paper in a 70 ℃ oven for 0.5h after coating, roasting the hydrophobic carbon paper in a 290 ℃ muffle furnace for 30min, heating the hydrophobic carbon paper to 350 ℃ and roasting the hydrophobic carbon paper for 30min to obtain a gas diffusion layer, wherein the mass content of the polytetrafluoroethylene in the microporous layer is 30%, and the thickness of the microporous layer is 40 mu m.
Example 4
A preparation method of a microporous layer of a gas diffusion layer of a proton exchange membrane fuel cell comprises the following steps:
(1) hydrophobic treatment of the base material: soaking the carbon paper with polypropylene emulsion, drying in a 70 ℃ oven for 0.5h, weighing, repeating the above operations for multiple times, weighing until the content of polypropylene in the carbon paper is 5%, roasting in a muffle furnace at 290 ℃ for 30min, and heating to 350 ℃ for 30 min;
(2) mixing 100g of deionized water, 100g of ethanol, 4g of triton X-100, 20g of acetylene black and 14.3g of polypropylene emulsion with the mass fraction of 60%, mechanically stirring for 2h, performing ultrasonic dispersion until uniform and consistent slurry is formed, coating the slurry on hydrophobic carbon paper by adopting a reverse roll, drying the coated carbon paper in a 70 ℃ oven for 0.5h, roasting in a 290 ℃ muffle furnace for 30min, and heating to 350 ℃ for roasting for 30min to obtain a microporous layer of the gas diffusion layer, wherein the mass content of polypropylene in the microporous layer is 30%, and the thickness of the microporous layer is 40 mu m.
Comparative example 1
A preparation method of a microporous layer of a gas diffusion layer of a proton exchange membrane fuel cell comprises the following steps:
(1) hydrophobic treatment of the base material: soaking carbon paper in polytetrafluoroethylene emulsion, drying in a 70 ℃ oven for 30min, weighing, repeating the above operations for multiple times until the PTFE content in the carbon paper is 5%, then roasting in a muffle furnace at 290 ℃ for 30min, and heating to 350 ℃ for roasting for 30 min;
(2) mixing 200g of deionized water, 4g of Triton X-100, 20g of XC-72 carbon black and 8.3g of 60 mass percent polytetrafluoroethylene emulsion together, mechanically stirring for 2h, performing ultrasonic dispersion until uniform and consistent slurry is formed, coating the slurry on hydrophobic carbon paper by a wire bar, drying the coated carbon paper in a 70 ℃ oven for 30min, roasting the carbon paper at 290 ℃ for 30min, and heating to 350 ℃ for 30min to obtain a microporous layer of the gas diffusion layer, wherein the mass content of the polytetrafluoroethylene in the microporous layer is 20 percent, and the thickness of the microporous layer is 20 mu m.
Comparative example 2
A preparation method of a microporous layer of a gas diffusion layer of a proton exchange membrane fuel cell comprises the following steps:
(1) hydrophobic treatment of the base material: soaking carbon paper in polytetrafluoroethylene emulsion, drying in a 70 ℃ oven for 0.5h, weighing, repeating the operations for multiple times until the PTFE content of the carbon paper is 5%, roasting in a muffle furnace at 290 ℃ for 30min, and heating to 350 ℃ for 30 min;
(2) 200g of deionized water, 4g of Triton X-100, 20g of XC-72 carbon black and 14.3g of 60 mass percent polytetrafluoroethylene emulsion are mixed, mechanically stirred for 2 hours, then ultrasonically dispersed until uniform and consistent slurry is formed, the slurry is ultrasonically sprayed on hydrophobic carbon paper, then roasted at 290 ℃ for 30min, and then heated to 350 ℃ for roasting for 30min, so as to obtain a microporous layer of the gas diffusion layer, wherein the mass content of the polytetrafluoroethylene in the microporous layer is 30 percent, and the thickness of the microporous layer is 40 mu m.
The membrane electrodes prepared using the gas diffusion layers of example 1 and comparative example 1 were subjected to a polarization curve test under the following test conditions: the working temperature of the cell is 80 ℃, the pressure of a cathode air inlet is 1.0bar, the metering ratio is 2.5, the relative humidity is 50 percent, the pressure of an anode air inlet is 1.1 bar, the metering ratio is 1.5, the relative humidity is 50 percent, and the working area of the cell is 25cm2. The test results are shown in fig. 3, and the test results show that example 1 exhibits higher performance in the concentration polarization region than comparative example 1, indicating that the present invention can well improve gas transport ability and water discharge ability at a large current density, thereby improving battery performance.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (8)
1. A preparation method of a microporous layer of a gas diffusion layer of a proton exchange membrane fuel cell is characterized by comprising the following steps:
(1) hydrophobic treatment of the base material: soaking the base material in a water repellent for 0.5-5min, then placing the base material in an oven at 50-120 ℃ for drying for 5-30min, weighing, repeating the operation for many times until the content of the water repellent in the base material is 5% -10%, then roasting the base material in a muffle furnace at 200-300 ℃ for 10-120min, and then heating to 350-400 ℃ for roasting for 10-120 min;
(2) mixing a conductive agent, a water repellent, a surfactant and a solvent together, mechanically stirring and ultrasonically dispersing until uniform microporous layer slurry is formed, coating the microporous layer slurry on the substrate subjected to the hydrophobic treatment in the step (1) by adopting a roll coating method, drying in a drying oven at 50-120 ℃ for 5-30min, roasting in a muffle furnace at 200-300 ℃ for 10-120min, and then heating to 350-400 ℃ for 10-120min to form the gas diffusion layer.
2. The preparation method of the microporous layer of the gas diffusion layer of the proton exchange membrane fuel cell as claimed in claim 1, wherein the water repellent in the steps (1) and (2) is one of polytetrafluoroethylene, polyvinylidene fluoride and polypropylene.
3. The method for preparing the microporous layer of the gas diffusion layer of the proton exchange membrane fuel cell according to claim 1, wherein the substrate in the step (1) is carbon paper or carbon cloth.
4. The method of claim 1, wherein the conductive agent in step (2) is a carbon material comprising one or more of activated carbon, graphitized carbon, carbon nanotubes, carbon fibers, and graphite powder.
5. The method of preparing a microporous layer for a gas diffusion layer of a proton exchange membrane fuel cell according to claim 1, wherein the surfactant in the step (2) is a nonionic surfactant.
6. The method for preparing the microporous layer of the gas diffusion layer of the proton exchange membrane fuel cell according to claim 1, wherein the solvent in the step (2) is one or a mixture of water, ethylene glycol, isopropanol, n-propanol and ethanol.
7. The method for preparing a microporous layer for a gas diffusion layer of a proton exchange membrane fuel cell according to claim 1, wherein the roll coating in the step (2) is a reverse roll coating or a forward roll coating.
8. The microporous layer of the gas diffusion layer of the proton exchange membrane fuel cell is characterized by being prepared by the preparation method of any one of claims 1 to 7, the thickness of the microporous layer of the gas diffusion layer is 10 to 50 microns, and the content of a water repellent in the microporous layer is 10 to 60 percent.
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| CN114824307A (en) * | 2022-03-15 | 2022-07-29 | 昀际科技(上海)有限责任公司 | Batch hydrophobic treatment method for gas diffusion layers of fuel cells and production line thereof |
| CN114824311A (en) * | 2022-03-31 | 2022-07-29 | 东风汽车集团股份有限公司 | Preparation method of gas diffusion layer |
| CN114927704A (en) * | 2022-05-12 | 2022-08-19 | 上海碳际实业集团有限公司 | Preparation method of gas diffusion layer for fuel cell |
| CN115036519A (en) * | 2022-07-04 | 2022-09-09 | 上海电气集团股份有限公司 | Fluorine-doped porous carbon, microporous layer, gas diffusion layer, preparation method and application |
| CN116995251A (en) * | 2023-09-26 | 2023-11-03 | 河南豫氢动力有限公司 | High-performance gas diffusion layer for fuel cell and preparation method thereof |
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| CN114824311A (en) * | 2022-03-31 | 2022-07-29 | 东风汽车集团股份有限公司 | Preparation method of gas diffusion layer |
| CN114927704A (en) * | 2022-05-12 | 2022-08-19 | 上海碳际实业集团有限公司 | Preparation method of gas diffusion layer for fuel cell |
| CN115036519A (en) * | 2022-07-04 | 2022-09-09 | 上海电气集团股份有限公司 | Fluorine-doped porous carbon, microporous layer, gas diffusion layer, preparation method and application |
| CN116995251A (en) * | 2023-09-26 | 2023-11-03 | 河南豫氢动力有限公司 | High-performance gas diffusion layer for fuel cell and preparation method thereof |
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