CN111029605A - Gas diffusion layer for fuel cell and preparation method and application thereof - Google Patents
Gas diffusion layer for fuel cell and preparation method and application thereof Download PDFInfo
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- H01M8/00—Fuel cells; Manufacture thereof
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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
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
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- 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
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Abstract
The invention relates to a gas diffusion layer for a fuel cell and a preparation method and application thereof.A carbon paper treated by a hydrophobic agent is used as a supporting layer, the hydrophobic agent, a conductive agent and a dispersing agent are used as microporous layer slurry and are uniformly sprayed on one side of the supporting layer, and then a hydrophilic agent is sprayed on the microporous layer in an atomization way to prepare the gas diffusion layer with a hydrophilic and hydrophobic synergistic structure; the hydrophobic agent suspension water solution is one of polytetrafluoroethylene, polyvinylidene fluoride, tetrafluoroethylene and hexafluoropropylene copolymer; the conductive agent includes: one or more of Vulcan XC-72R conductive carbon black, Super P conductive carbon black, acetylene black, carbon nanotubes, graphene oxide or conductive graphite; the dispersing agent is one of sodium dodecyl benzene sulfonate, sodium dodecyl sulfate and polyvinylpyrrolidone. The invention is used for the application of the gas diffusion layer with hydrophilic and hydrophobic cooperative structure for the proton exchange membrane fuel cell.
Description
Technical Field
The invention belongs to the field of fuel cells, and particularly relates to a gas diffusion layer with a hydrophilic and hydrophobic synergistic structure for a fuel cell, and preparation and application thereof.
Background
The proton exchange membrane fuel cell has the characteristics of quick start, high energy density and environmental friendliness. These unique properties make them ideal alternatives for use in a variety of stationary and mobile power supply applications.
The core component of a proton exchange membrane fuel cell is the membrane electrode. The membrane electrode is respectively provided with a proton exchange membrane, a cathode catalyst layer, an anode catalyst layer, a cathode gas diffusion layer and an anode gas diffusion layer from the middle to two sides.
The gas diffusion layer includes a support layer and a microporous layer. The support layer is typically composed of a hydrophobically treated carbon paper or cloth and the microporous layer (MPL) is typically composed of a carbon material and additives. Gas diffusion layers play an important role in fuel cells, and mainly include: responsible for the conduction of electrons between the catalyst layer and the bipolar plate, efficient transport of gas to the catalyst layer, maintenance of the humidification of the proton exchange membrane and effective water management to prevent flooding.
After the gas diffusion layer is treated by common additives such as Polytetrafluoroethylene (PTFE), fluorinated ethylene propylene copolymer (FEP) and polyvinylidene fluoride (PVDF), the good hydration degree of the proton exchange membrane can be ensured under low current density. However, when the pem fuel cell is operated at a high current density, the generated water is difficult to be discharged, and the gas transmission is easily hindered. Chinese patent CN109461940A discloses a gas diffusion layer designed with two microporous layers, the first microporous layer is composed of carbon powder and teflon, and the second microporous layer is composed of carbon nanotube or carbon fiber and carbon powder, and additive. Because the carbon nanofiber material or the carbon nanotube is used as a three-dimensional framework, the three-dimensional space between the gas diffusion layer and the catalyst layer is improved, and thus the water management capacity of the battery is improved. But the process of preparing the dual microporous layer is complicated and the battery performance is not greatly improved. Chinese patent CN104541395A discloses the preparation of a microporous layer with hydrophilic additives, which utilizes the hydrophilic and hydrophobic synergistic effect to promote the rapid removal of cathode water and improve the water management capability of the cell. However, when the hydrophilic additives are mixed in proportion, the water transmission path is tortuous, the communication depth is not enough, and partial liquid blockage can be caused, so that the water is flooded. Therefore, hydrophilic and hydrophobic synergistic effects are formed in the integral gas diffusion layer, and independent water transmission channels are very necessary to be formed.
Disclosure of Invention
The invention aims to provide a gas diffusion layer for a fuel cell and a preparation method and application thereof.
The technical scheme adopted by the invention is as follows:
a gas diffusion layer for a fuel cell is characterized in that carbon paper treated by a hydrophobic agent is used as a supporting layer, the hydrophobic agent, a conductive agent and a dispersing agent are used as microporous layer slurry, the slurry is uniformly sprayed on one side of the supporting layer, and then a hydrophilic agent is sprayed on the microporous layer in an atomization mode to form the gas diffusion layer with a hydrophilic and hydrophobic synergistic structure; the hydrophobic agent suspension water solution is one of polytetrafluoroethylene, polyvinylidene fluoride, tetrafluoroethylene and hexafluoropropylene copolymer; the conductive agent includes: one or more of Vulcan XC-72R conductive carbon black, Super P conductive carbon black, acetylene black, carbon nanotubes, graphene oxide or conductive graphite; the dispersing agent is one of sodium dodecyl benzene sulfonate, sodium dodecyl sulfate and polyvinylpyrrolidone.
Further, soaking the carbon paper by using 10-40 wt% of hydrophobic agent suspension water solution, and drying at 70-90 ℃. Repeatedly soaking, drying and weighing until the weight ratio of the hydrophobic agent to the carbon paper is 10-40 wt%, and then calcining to prepare the hydrophobic agent.
Further, the aqueous suspension solution of the hydrophobic agent is an aqueous suspension solution of one of Polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), and a copolymer of tetrafluoroethylene and hexafluoropropylene (FEP). The concentration of the suspension aqueous solution of the hydrophobing agent was 10 wt%.
Further, evenly spraying microporous layer slurry on one side of the carbon paper treated by the hydrophobic agent, drying and weighing, and repeating for multiple times until the loading amount of the conductive agent reaches 1.0-3.0mg/cm2And calcining the mixture in a muffle furnace at the temperature of 200 ℃ and 400 ℃ for 30-60 min.
Further, the microporous layer slurry comprises a conductive agent, a dispersing agent and a hydrophobic agent suspension aqueous solution.
Further, the conductive agent includes: one or more of Vulcan XC-72R conductive carbon black, Super P conductive carbon black, acetylene black, carbon nanotubes, graphene oxide or conductive graphite. The addition amount is 50-200 mg.
Further, the dispersant is one of Sodium Dodecyl Benzene Sulfonate (SDBS), Sodium Dodecyl Sulfate (SDS) and polyvinylpyrrolidone (PVP), and is dissolved in deionized water to form a uniform aqueous solution, wherein the concentration of the dispersant is controlled to be 0-1.5 wt%.
Further, the aqueous suspension solution of the hydrophobizing agent may be an aqueous suspension solution of one of Polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), a copolymer of tetrafluoroethylene and hexafluoropropylene (FEP). The concentration of the suspension water solution of the hydrophobing agent is 10wt percent, and the addition amount is 200-1000 mg.
Further, the preparation process of the microporous layer slurry comprises the following steps: adding a conductive agent into the aqueous solution of the dispersing agent, magnetically stirring for 0-12h to form a suspension, adding a certain amount of hydrophobing agent to suspend the aqueous solution into the suspension, and performing ultrasonic treatment for 0.5-2 h.
Further, a hydrophilic reagent solution is sprayed on the microporous layer to construct hydrophilic micro-regions.
Further, the hydrophilic agent may be one of dioctyl sodium sulfosuccinate (ot-75), polyvinyl alcohol (PVA), N-vinyl formamide (NVF):
(1) the concentration of the hydrophilic agent is 5-15 wt%.
(2) The hydrophilic agent is added with a certain amount of film forming agent, which can be polyacrylic acid (PAA) or acrylate/octyl amine acrylate copolymer (DC-79).
(3) Film-forming agent concentration: 5-15 wt%.
(4) The hydrophilic agent is sprayed on one surface of the microporous layer in an atomization mode, wherein the atomization mode is one of ultrasonic atomization, airflow atomization and pressure atomization.
The invention also provides the application of the gas diffusion layer with the hydrophilic and hydrophobic synergistic structure for the proton exchange membrane fuel cell. The purpose of gas-liquid two-phase separation and transmission is realized, and the water management capacity of the fuel cell is improved.
The invention has the advantages that:
not only is the process simple to operate relative to laser and plasma treatments, but the depth of treatment can be made to reach the carbon paper substrate is mainly due to the atomization of the low surface energy hydrophilic agents. The hydrophilic and hydrophobic cooperative surface structure of the integral gas diffusion layer is realized.
Constructing a gas diffusion layer with a hydrophilic and hydrophobic cooperative surface, as shown in fig. 1, which is a schematic structural diagram of a hydrophilic and hydrophobic cooperative surface, wherein a catalyst layer 1, a gas diffusion layer 2, a hydrophilic micro-area 3, a hydrophobic micro-area 4, a gas transmission path 5 and a water transmission path 6 are shown in the figure. The water produced by the cell at high current density will preferentially pass through the hydrophilic domains and will not occupy the gas transport path. The supply of the catalyst layer gas is ensured and the peak power of the cell is improved.
Drawings
FIG. 1 is a schematic structural diagram of a hydrophilic and hydrophobic synergistic surface: 1-catalyst layer, 2-gas diffusion layer, 3-hydrophilic micro-area, 4-hydrophobic micro-area, 5-gas transmission path and 6-water transmission path.
Fig. 2 is a graph showing the performance of the batteries according to the embodiment 1 and the comparative example 1, in which the conductive agent is carbon nanotubes and graphene oxide. After the atomized hydrophilic agent is sprayed on the microporous layer, the current density of the tensile load is increased, and the peak power of the battery is improved by 76%.
FIG. 3 shows that the conductive agent is carbon nanotube and graphene oxide, and the concentration of the conductive agent is 0.5A/cm for example 1 and comparative example 1 of the present invention2Battery ac impedance plot at current density. It is seen that the ohmic resistance of the cell was not improved by spraying the atomized hydrophilic agent onto the microporous layer.
FIG. 4 is a graph of cell performance curves for example 2 and comparative example 1, in which the conductive agent is Vulcan XC-72R conductive carbon black, and the peak power of the cell is increased by 21.4% after the atomized hydrophilic agent is sprayed on the microporous layer.
FIG. 5 shows Vulcan XC-72R conductive carbon black as a conductive agent, and the conductive agent is 0.5A/cm for example 2 and comparative example 1 of the present invention2Electric currentCell ac impedance plot at density. It can be seen that the ohmic resistance of the cell was not improved after the atomized hydrophilic agent was sprayed on the microporous layer.
FIG. 6 is a surface element distribution diagram (mapping) of Vulcan XC-72 conductive carbon black as a conductive agent, and a region where S elements are intensively distributed is a hydrophilic region.
Detailed Description
Example 1
According to the method, the carbon paper is placed in 10 wt% PTFE suspension for dipping treatment, dried at 85 ℃, dipped, dried and weighed, and repeated for several times, and finally the PTFE content is 30 wt%, and then the carbon paper is placed in a muffle furnace and calcined for 60min at 350 ℃. Weighing 50mg of sodium dodecyl benzene sulfonate, adding the sodium dodecyl benzene sulfonate into 5g of deionized water to form a uniform solution, placing the uniform solution on a magnetic stirring table, weighing 200mg of carbon nanotubes, adding the carbon nanotubes while stirring, magnetically stirring for 12 hours to obtain a suspension, and adding 15mL of dispersed graphene oxide dispersion liquid, 900mg of 10 wt% PTFE suspension, 800mg of deionized water and 400mg of isopropanol. And carrying out ultrasonic treatment for 2h to obtain microporous layer slurry. Spraying the microporous layer slurry on hydrophobized carbon paper, drying at 85 deg.C, soaking, drying, weighing, repeating for several times, and the final loading amount is 2.0mg/cm2And putting the mixture into a muffle furnace to calcine the mixture for 60min at 350 ℃. An ultrasonically atomized hydrophilic agent (10 wt% OT-75, 10 wt% PAA) was sprayed on the microporous layer.
Example 1 was used as a gas diffusion layer for both the cathode and anode, using the Gore PRIMEA membrane electrode assembly of the united states as a catalyst coated membrane with a cathode catalyst Pt/C loading of 0.4mg/cm2The Pt/C loading capacity of the anode is 0.15mg/cm2. Battery performance and ac impedance test conditions: cell 60 ℃, humidity 100%, back pressure 50kPa, cathode: 275mL/min air, anode: 110mL/min hydrogen. As shown in fig. 2, the performance curves of the batteries of example 1 and comparative example 1 of the present invention are obtained by using carbon nanotubes and graphene oxide as the conductive agent. After the atomized hydrophilic agent was sprayed on the microporous layer, the current density on the load increased and the I-V curve showed a 76% increase in the peak power of the cell. FIG. 3 shows that the conductive agent is carbon nanotube and graphene oxide, and the concentration of the conductive agent is 0.5A/cm for example 1 and comparative example 1 of the present invention2Battery ac impedance plot at current density. From the figureIt is known that the ohmic resistance of the cell is not improved after the atomized hydrophilic agent is sprayed on the microporous layer.
Example 2
According to the method, the carbon paper is placed in 10 wt% PTFE suspension for treatment, dried at 80 ℃, soaked, dried, weighed and repeated for several times, and finally the PTFE content is 30 wt%, and the carbon paper is placed in a muffle furnace and calcined at 350 ℃ for 60 min. 98mg of Vulcan XC-72R, 420mg of 10 wt% PTFE, 9.8g of deionized water, 19.6g of isopropanol were weighed and sonicated for 2 h. Spraying the microporous layer slurry on hydrophobized carbon paper, drying at 80 deg.C, soaking, drying, weighing, repeating for several times, and the final loading amount is 2.0mg/cm2And putting the mixture into a muffle furnace to calcine the mixture for 60min at 350 ℃. An ultrasonically atomized hydrophilic agent (5 wt% OT-75, 10 wt% PAA) was sprayed on the microporous layer.
Example 2 was used as gas diffusion layers for the cathode and anode, using the Gore PRIMEA membrane electrode assembly as the catalyst coated membrane with a cathode catalyst Pt/C loading of 0.4mg/cm2Anode Pt/C loading 0.15mg/cm2. Battery performance and ac impedance test conditions: cell 60 ℃, humidity 100%, back pressure 50kPa, cathode: 275mL/min air, anode: 110mL/min hydrogen. The I-V curve shows a 21.4% increase in the peak power of the cell.
Example 3
And (3) placing the carbon paper in a 10 wt% PVDF suspension for treatment, drying at 75 ℃, soaking, drying, weighing and repeating for several times, wherein the final PVDF content is 30 wt%, and placing the paper in a muffle furnace for calcining at 300 ℃ for 60 min. Weighing 50mg of sodium dodecyl sulfate, adding the sodium dodecyl sulfate into 5g of deionized water to form a uniform solution, placing the uniform solution on a magnetic stirring table, weighing 200mg of carbon nanotubes, adding the carbon nanotubes while stirring, magnetically stirring for 12 hours to obtain a suspension, adding 15mL of dispersed graphene dispersion, 900mg of 10 wt% PVDF suspension, 800mg of deionized water and 400mg of isopropanol, and carrying out ultrasonic treatment for 2 hours to obtain the microporous layer slurry. Spraying the microporous layer slurry on hydrophobized carbon paper, drying at 75 deg.C, soaking, drying, weighing, repeating for several times, and the final loading amount is 2.0mg/cm2And calcining the mixture in a muffle furnace at 300 ℃ for 60 min. A gas atomized hydrophilizing agent (10 wt% NVF, 5 wt% DC-79) was sprayed onto the microporous layer.
Example 3 was used as gas diffusion layers for the cathode and anode, using the Gore PRIMEA membrane electrode assembly as the catalyst coated membrane with a cathode catalyst Pt/C loading of 0.4mg/cm2Anode Pt/C loading 0.15mg/cm2. Battery performance and ac impedance test conditions: cell 60 ℃, humidity 100%, back pressure 50kPa, cathode: 275mL/min air, anode: 110mL/min hydrogen. The I-V curve shows a 17.3% increase in the peak power of the cell.
FIG. 4 is a graph of cell performance curves for example 2 and comparative example 1, in which the conductive agent is Vulcan XC-72R conductive carbon black, and the peak power of the cell is increased by 21.4% after the atomized hydrophilic agent is sprayed on the microporous layer.
FIG. 5 shows Vulcan XC-72R conductive carbon black as a conductive agent, and the conductive agent is 0.5A/cm for example 2 and comparative example 1 of the present invention2Battery ac impedance plot at current density. It can be seen that the ohmic resistance of the cell was not improved after the atomized hydrophilic agent was sprayed on the microporous layer.
FIG. 6 is a surface element distribution diagram (mapping) of Vulcan XC-72 conductive carbon black as a conductive agent, and a region where S elements are intensively distributed is a hydrophilic region.
Example 4
According to the method, the carbon paper is placed in 10 wt% PVDF suspension for treatment, dried at 85 ℃, soaked, dried, weighed and repeated for several times, and finally the PVDF content is 20 wt%, and the carbon paper is placed in a muffle furnace and calcined for 40min at 280 ℃. 98mg of AB, 245mg of 10 wt% PVDF, 9.8g deionized water, 19.6g isopropanol were weighed and sonicated for 2 h. Spraying the microporous layer slurry on hydrophobized carbon paper, drying at 80 deg.C, soaking, drying, weighing, repeating for several times, and the final loading amount is 1.5mg/cm2And putting the mixture into a muffle furnace to calcine the mixture for 40min at the temperature of 280 ℃. Pressure atomized hydrophilic agent (10 wt% NVF, 10 wt% DC-79) was sprayed onto the microporous layer.
Example 4 was used as gas diffusion layers for the cathode and anode, using the Gore PRIMEA membrane electrode assembly as the catalyst coated membrane with a cathode catalyst Pt/C loading of 0.4mg/cm2Anode Pt/C loading 0.15mg/cm2. Battery performance and balanceFlow impedance test conditions: cell 60 ℃, humidity 100%, back pressure 50kPa, cathode: 275mL/min air, anode: 110mL/min hydrogen. The I-V curve shows a 15% increase in the peak power of the cell.
Example 5
According to the method, the carbon paper is placed in 10 wt% FEP suspension for treatment, dried at 80 ℃, dipped, dried, weighed and repeated for several times, and finally the final FEP content is 30 wt%, and the carbon paper is placed in a muffle furnace and calcined at 250 ℃ for 60 min. 98mg of Super P, 420mg of 10 wt% FEP, 9.8g of deionized water, 19.6g of isopropanol were weighed and sonicated for 2 h. Spraying the microporous layer slurry on hydrophobized carbon paper, drying at 75 deg.C, soaking, drying, weighing, repeating for several times, and the final loading amount is 1.0mg/cm2And calcining the mixture in a muffle furnace at 250 ℃ for 60 min. An ultrasonically atomized hydrophilic agent (5 wt% PVA, 10 wt% PAA) was sprayed on the microporous layer.
Example 5 as gas diffusion layers for cathode and anode, using the Gore PRIMEA membrane electrode assembly as a catalyst coated membrane with a cathode catalyst Pt/C loading of 0.4mg/cm2Anode Pt/C loading 0.15mg/cm2. Battery performance and ac impedance test conditions: cell 60 ℃, humidity 100%, back pressure 50kPa, cathode: 275mL/min air, anode: 110mL/min hydrogen. The I-V curve shows a 24.2% increase in the peak power of the cell.
Comparative example 1
And (3) placing the carbon paper in 10 wt% of PTFE suspension for treatment, drying at 80 ℃, soaking, drying, weighing and repeating for several times, wherein the final PTFE content is 30 wt%, and placing the paper in a muffle furnace for calcining at 350 ℃ for 60 min. Weighing 50mg of sodium dodecyl benzene sulfonate, adding the sodium dodecyl benzene sulfonate into 5g of deionized water to form a uniform solution, placing the uniform solution on a magnetic stirring table, weighing 200mg of carbon nanotubes, adding the carbon nanotubes while stirring, performing magnetic stirring for 12 hours to obtain a suspension, adding 15mL of dispersed graphene oxide dispersion, 900mg of 10 wt% of PTFE suspension, 800mg of deionized water and 400mg of isopropanol, and performing ultrasonic treatment for 2 hours to obtain the microporous layer slurry. Spraying the microporous layer slurry on hydrophobized carbon paper, drying at 80 deg.C, soaking, drying, weighing, repeating for several times, and making final loading amount be 2.0mg/cm2And putting the mixture into a muffle furnace to calcine the mixture for 60min at 350 ℃.
Changing the conductive agent to be Vulcan XC-72R conductive carbon black, placing carbon paper in 10 wt% PTFE suspension for treatment, drying at 80 ℃, soaking, drying, weighing, repeating for several times, finally putting the carbon paper in a muffle furnace, calcining at 350 ℃ for 60min, weighing 98mg of Vulcan XC-72R, 420mg of 10 wt% PTFE, 9.8g of deionized water and 19.6g of isopropanol, and carrying out ultrasonic treatment for 2 h. Spraying the microporous layer slurry on hydrophobized carbon paper, drying, soaking, drying, weighing, repeating for several times, and the final loading is 2.0mg/cm2And putting the mixture into a muffle furnace to calcine the mixture for 60min at 350 ℃.
Comparative example 1 was used as the gas diffusion layer for the cathode and anode, using the Gore PRIMEA membrane electrode assembly of the usa as the catalyst coated membrane, with a Pt/C loading of the cathode catalyst of 0.4mg/cm2Anode Pt/C loading 0.15mg/cm2. Battery performance and ac impedance test conditions: cell 60 ℃, humidity 100%, back pressure 50kPa, cathode: 275mL/min air, anode: 110mL/min hydrogen.
Claims (10)
1. A gas diffusion layer for a fuel cell is characterized in that carbon paper treated by a hydrophobic agent is used as a supporting layer, the hydrophobic agent, a conductive agent and a dispersing agent are used as microporous layer slurry, the slurry is uniformly sprayed on one side of the supporting layer, and then a hydrophilic agent is sprayed on the microporous layer in an atomization mode to prepare the gas diffusion layer with a hydrophilic and hydrophobic synergistic structure;
the hydrophobic agent suspension water solution is one of polytetrafluoroethylene, polyvinylidene fluoride, tetrafluoroethylene and hexafluoropropylene copolymer;
the conductive agent includes: one or more of Vulcan XC-72R conductive carbon black, Super P conductive carbon black, acetylene black, carbon nanotubes, graphene oxide or conductive graphite;
the dispersing agent is one of sodium dodecyl benzene sulfonate, sodium dodecyl sulfate and polyvinylpyrrolidone.
2. The gas diffusion layer for a fuel cell according to claim 1, wherein the hydrophobic agent is carbon paper impregnated with 10-40 wt% of a hydrophobic agent suspension aqueous solution, dried at 70-90 ℃; repeatedly soaking, drying and weighing until the weight ratio of the hydrophobic agent to the carbon paper is 10-40 wt%, and then calcining to prepare the hydrophobic agent.
3. The gas diffusion layer for a fuel cell according to claim 2, wherein the water repellent agent has a suspension aqueous solution concentration of 10 wt%; the addition amount is 200-1000 mg.
4. The gas diffusion layer for a fuel cell according to claim 2, wherein the hydrophobic agent suspension aqueous solution is used for soaking the carbon paper, the microporous layer slurry is uniformly sprayed on one side of the carbon paper treated by the hydrophobic agent, and the microporous layer slurry is dried and weighed and repeatedly sprayed for a plurality of times until the loading amount of the conductive agent reaches 1.0-3.0mg/cm2。
5. The gas diffusion layer for a fuel cell as claimed in claim 2, wherein the calcination is performed in a muffle furnace at a temperature of 200-400 ℃ for 30-60 min.
6. The gas diffusion layer for a fuel cell according to claim 1, wherein the amount of the conductive agent added is 50 to 200 mg.
7. The gas diffusion layer for a fuel cell according to claim 1, wherein the concentration of the dispersant is controlled to be within 1.5 wt%.
8. A method of preparing a gas diffusion layer for a fuel cell according to claim 1, wherein in the preparation of the microporous layer slurry: adding conductive agent into the aqueous solution of the dispersing agent, magnetically stirring to form suspension, adding a certain amount of hydrophobic agent suspension aqueous solution into the suspension, and performing ultrasonic treatment for 0.5-2 h.
9. The method for preparing a gas diffusion layer for a fuel cell according to claim 8, wherein hydrophilic micro domains are constructed by spraying a hydrophilic agent solution on the micro-porous layer; the hydrophilic agent is one of dioctyl sodium sulfosuccinate, polyvinyl alcohol and N-vinyl formamide: the concentration of the hydrophilic reagent is 5-15 wt%; the film forming agent added in the hydrophilic agent is one of polyacrylic acid and acrylate/octyl amine acrylate copolymer; the concentration of the film forming agent is as follows: 5-15 wt%; the hydrophilic reagent is sprayed on one surface of the microporous layer in an atomization mode, wherein the atomization mode is one of ultrasonic atomization, airflow atomization and pressure atomization.
10. The use of the gas diffusion layer for a fuel cell according to claim 1, which is a hydrophilic and hydrophobic gas diffusion layer for a proton exchange membrane fuel cell.
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| CN111916765A (en) * | 2020-07-29 | 2020-11-10 | 一汽解放汽车有限公司 | Method for preparing gas diffusion layer in fuel cell |
| CN112928285A (en) * | 2021-03-10 | 2021-06-08 | 上海电气集团股份有限公司 | Gas diffusion layer, preparation method thereof, fuel cell anode and fuel cell |
| CN113140768A (en) * | 2021-04-12 | 2021-07-20 | 上海交通大学 | Cathode side structure of integrated reversible fuel cell membrane electrode |
| CN114373947A (en) * | 2022-01-04 | 2022-04-19 | 江苏科技大学 | Carbon paper gas diffusion layer for fuel cell and preparation method thereof |
| CN114464834A (en) * | 2022-01-25 | 2022-05-10 | 深圳市通用氢能科技有限公司 | Fuel cell gas diffusion layer, preparation method thereof and fuel cell |
| CN114824345A (en) * | 2022-03-15 | 2022-07-29 | 昀际科技(上海)有限责任公司 | Continuous preparation method and production line for gas diffusion layer of fuel cell |
| CN114824296A (en) * | 2022-03-18 | 2022-07-29 | 福州大学 | Gas diffusion layer with hydrophilic and hydrophobic structures and preparation method thereof |
| CN115000446A (en) * | 2022-07-22 | 2022-09-02 | 上海电气集团股份有限公司 | Gas diffusion layer, preparation method thereof, membrane electrode, cell and application |
| WO2022222220A1 (en) * | 2021-04-21 | 2022-10-27 | 华东理工大学 | Gas diffusion layer, preparation method therefor and application thereof, and fuel cell |
| 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 |
| US11876232B2 (en) | 2021-05-31 | 2024-01-16 | Donghua University | Gas diffusion layer for proton exchange membrane fuel cell and preparation method thereof |
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| CN115000446B (en) * | 2022-07-22 | 2024-05-31 | 上海电气集团股份有限公司 | Gas diffusion layer, preparation method thereof, membrane electrode, battery and application |
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