CN109585858B - Preparation method of fuel cell gas diffusion layer with hydrophobicity - Google Patents
Preparation method of fuel cell gas diffusion layer with hydrophobicity Download PDFInfo
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- CN109585858B CN109585858B CN201811169893.7A CN201811169893A CN109585858B CN 109585858 B CN109585858 B CN 109585858B CN 201811169893 A CN201811169893 A CN 201811169893A CN 109585858 B CN109585858 B CN 109585858B
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- 238000009792 diffusion process Methods 0.000 title claims abstract description 30
- 239000000446 fuel Substances 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title abstract description 13
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 30
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 25
- 239000004917 carbon fiber Substances 0.000 claims abstract description 25
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 19
- 239000002002 slurry Substances 0.000 claims abstract description 15
- 239000002245 particle Substances 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 239000000758 substrate Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000006229 carbon black Substances 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 239000011248 coating agent Substances 0.000 claims abstract description 3
- 238000000576 coating method Methods 0.000 claims abstract description 3
- 238000002156 mixing Methods 0.000 claims abstract description 3
- XPFVYQJUAUNWIW-UHFFFAOYSA-N furfuryl alcohol Chemical compound OCC1=CC=CO1 XPFVYQJUAUNWIW-UHFFFAOYSA-N 0.000 claims description 21
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 5
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical group C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 22
- 239000012528 membrane Substances 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 239000012046 mixed solvent Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003273 ketjen black Substances 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000010335 hydrothermal treatment Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- 238000005303 weighing 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
-
- 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)
- Inert Electrodes (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a preparation method of a fuel cell gas diffusion layer with hydrophobicity, which comprises the following steps of carrying out hydrophobic treatment on a porous carbon fiber substrate in a hydrophobic agent solution; then carrying out heat treatment on the porous carbon fiber base material subjected to hydrophobic treatment at the temperature of 60-150 ℃ for 5-30 minutes; preparing microporous layer slurry, wherein the microporous layer slurry is prepared by mixing a hydrophobic agent, carbon black particles and water; coating the microporous layer slurry on one side of a porous carbon fiber substrate, and carrying out heat treatment at 60-150 ℃ for 5-30 minutes to obtain a fuel cell gas diffusion layer with hydrophobicity; the preparation method has the advantages of economy, rapidness and high production efficiency.
Description
Technical Field
The invention belongs to the field of fuel cells, and particularly relates to a preparation method of a gas diffusion layer of a fuel cell with hydrophobicity.
Background
The fuel cell has the advantages of high power density, high energy conversion efficiency, environmental friendliness and the like, is most hopeful to become a power source of a zero-pollution zero-emission electric automobile, and becomes one of hot spots of international high and new technology competition today when the global energy crisis and the environment are increasingly worsened.
A fuel cell is a device that directly converts the chemical energy of a fuel and an oxidant into electrical energy. The device has the greatest characteristic that the energy conversion efficiency is not limited by Carnot cycle, the energy conversion efficiency is as high as 60-80%, the actual use efficiency is 2-3 times of that of a common internal combustion engine, and the fuel cell has the advantages of diversified fuels, environmental friendliness, almost no emission of nitrogen oxides and sulfur oxides and the like. Due to these outstanding advantages, the development and application of fuel cell technology are receiving much attention from governments and large companies, and are considered to be the first choice for clean and efficient power generation in the 21 st century.
The fuel cell is mainly composed of bipolar plates, membrane electrodes, sealing elements, fasteners, end plates and the like. The membrane electrode mainly comprises a proton exchange membrane, a catalyst and a gas diffusion layer, and the gas diffusion layer of the fuel cell plays a role of a bridge for the hydro-thermal treatment of the fuel cell, provides necessary support for a catalyst layer of the membrane electrode of the fuel cell, provides a transmission channel for gas, water and heat management, and the like.
The existing preparation method of the gas diffusion layer is that a porous carbon fiber material is used as a base material, polytetrafluoroethylene emulsion is used as a hydrophobic agent, and high-temperature treatment (about 400 ℃) is needed to enable polytetrafluoroethylene to flow in a melting way to be hydrophobic on the pore wall of the porous carbon fiber material, so that the problems of high treatment temperature, long treatment time, high production cost of the production process and the like exist.
Therefore, the method for hydrophobic treatment process of the gas diffusion layer with low cost is found, and has important significance for improving the cost of the membrane electrode and the fuel cell.
Disclosure of Invention
The invention aims at the current research situation and provides a novel preparation method of a gas diffusion layer, which has the advantages of economy, rapidness and high production efficiency.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for preparing a gas diffusion layer using a novel hydrophobic material, comprising the steps of:
(1) carrying out hydrophobic treatment on the porous carbon fiber substrate in a hydrophobic agent solution;
(2) then, carrying out heat treatment on the porous carbon fiber base material subjected to hydrophobic treatment at the temperature of 60-150 ℃ for 5-30 minutes;
(3) preparing microporous layer slurry, wherein the microporous layer slurry is prepared by mixing a hydrophobic agent, carbon black particles (carbon powder) and water;
(4) and coating the microporous layer slurry on one side of the hydrophobic porous carbon fiber substrate, and carrying out heat treatment at the temperature of 60-150 ℃ for 5-30 minutes to obtain the hydrophobic fuel cell gas diffusion layer.
The preparation method of the fuel cell gas diffusion layer with hydrophobicity comprises the step (1) that the hydrophobizing agent solution is a low-molecular organic liquid containing furan rings, wherein the organic liquid is one or a mixture of furfuryl alcohol, furfural and difurfuryl alcohol.
The preparation method of the fuel cell gas diffusion layer with hydrophobicity comprises the following steps that the porosity of the porous carbon fiber base material in the step (1) is 60-90%; the thickness is 90 to 400 μm.
The preparation method of the fuel cell gas diffusion layer with hydrophobicity comprises the step (3) that the particle size of carbon black particles is 10-200 nm. The specific diameter-diameter ratio and the surface area are 50-1000 m2/g。
Compared with the prior art, the preparation method of the invention comprises the following steps:
the invention provides a gas diffusion layer of a proton exchange membrane fuel cell and a preparation method thereof, which can avoid the high-temperature treatment process of the gas diffusion layer;
2, the gas diffusion layer of the proton exchange membrane fuel cell and the preparation method thereof have simple, convenient and quick process treatment.
Drawings
FIG. 1 is a schematic view of the structure of a gas diffusion layer according to the present invention;
fig. 2 and 3 are SEM images of the carbon fiber material of the present invention before and after the hydrophobic treatment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1 to 3, the present invention relates to a method for preparing a gas diffusion layer for a fuel cell having hydrophobicity, the gas diffusion layer including a porous carbon fiber material and a microporous layer, both of which are a polymer of a low-molecular organic liquid containing furan rings as a hydrophobic agent.
Example 1
(1) Completely soaking a carbon fiber material (TGP-H-060 of Dongli company, the thickness of which is 190 mu m, the porosity of which is 78%) in a furfuryl alcohol solvent;
(2) the carbon fiber material was removed from the furfuryl alcohol solvent and dried at a temperature of 80 ℃ for about 5 minutes;
(3) weighing 5g of carbon powder (Vulcan XC-72R, Kabot corporation, particle diameter about 30nm, specific surface area about 250m2Per gram), 30 grams of furfuryl alcohol and 30 grams of water are ultrasonically mixed for 30 minutes to prepare microporous layer slurry;
(4) the microporous layer slurry was coated on one side of the hydrophobic-treated carbon fiber material and dried at a temperature of 80 c for about 5 minutes, to obtain a gas diffusion layer.
Example 2
(1) Completely soaking a carbon fiber material (TGP-H-090 of Dongli company, the thickness of which is 280 mu m, the porosity of which is 78%) in a mixed solvent of furfural and difurfuryl alcohol (the mass ratio is 1: 1);
(2) taking the carbon fiber material out of the mixed solvent of the furfural and the difurfuryl alcohol, and drying at the temperature of 150 ℃ for about 5 minutes;
(3) 5g of carbon powder (Ketjenblack EC-300J, Ketjenblack Corp., having a particle size of about 50nm and a specific surface area of about 250 m) was weighed2(g)), 30g of a mixed solvent of furfural and difurfuryl alcohol (mass ratio of 1: 1) 30g of water is ultrasonically treated for 30 minutes to prepare microporous layer slurry;
(4) the microporous layer slurry was coated on one side of the carbon fiber material subjected to the hydrophobic treatment, and dried at a temperature of 60 c for about 30 minutes, to obtain a gas diffusion layer.
Example 3
(1) Completely soaking a carbon fiber material (GDS 310, available from carbon energy company, with the thickness of 310 μm and the porosity of 77%) in a mixed solvent of furfuryl alcohol, furfural and difurfuryl alcohol (the mass ratio is 1: 1: 1);
(2) taking the carbon fiber material out of the mixed solvent of the furfural and the difurfuryl alcohol, and drying at the temperature of 150 ℃ for about 5 minutes;
(3) 5g of carbon powder (FCX 80 Kabot corporation, particle size about 100nm, specific surface area about 800 m) was weighed2Per gram), 30 grams of furfuryl alcohol, mixed dissolution of furfural and difurfuryl alcohol (mass ratio 1: 1: 1) 30g water ultrasoundMixing and preparing for 30 minutes to obtain microporous layer slurry;
(4) the microporous layer slurry was coated on one side of the hydrophobic-treated carbon fiber material and dried at a temperature of 150 c for about 5 minutes, to obtain a gas diffusion layer.
Claims (5)
1. A method of preparing a fuel cell gas diffusion layer having hydrophobic properties, characterized by: comprises the steps of
(1) Carrying out hydrophobic treatment on the porous carbon fiber substrate in a hydrophobic agent solution, wherein the hydrophobic agent solution is a low-molecular-weight organic liquid containing furan rings, and the organic liquid is one or a mixture of furfuryl alcohol, furfural and difurfuryl alcohol;
(2) then, carrying out heat treatment on the porous carbon fiber base material subjected to hydrophobic treatment at the temperature of 60-80 ℃ for 5-30 minutes;
(3) preparing microporous layer slurry, wherein the microporous layer slurry is prepared by mixing a hydrophobic agent, carbon black particles and water;
(4) and coating the microporous layer slurry on one side of the porous carbon fiber substrate, and carrying out heat treatment at the temperature of 60-80 ℃ for 5-30 minutes to obtain the hydrophobic fuel cell gas diffusion layer.
2. The method for preparing a hydrophobic gas diffusion layer for a fuel cell according to claim 1, wherein the porosity of the porous carbon fiber substrate in the step (1) is 60 to 90%.
3. The method for preparing a hydrophobic gas diffusion layer for a fuel cell according to claim 1, wherein the thickness of the porous carbon fiber substrate in the step (1) is 90 to 400 μm.
4. The method for preparing a hydrophobic gas diffusion layer for a fuel cell according to claim 1, wherein the carbon black particles in the step (3) have a particle size of 10 to 200 nm.
5. The method for preparing a hydrophobic gas diffusion layer for a fuel cell according to claim 1, wherein the carbon black particles in the step (3) have a particle diameter to surface area of 50 to 1000m2/g。
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| CN201811169893.7A CN109585858B (en) | 2018-10-08 | 2018-10-08 | Preparation method of fuel cell gas diffusion layer with hydrophobicity |
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| CN109585858B true CN109585858B (en) | 2021-06-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110048127B (en) * | 2019-05-17 | 2024-03-29 | 深圳市通用氢能科技有限公司 | Fuel cell gas diffusion layer, fuel cell and preparation method |
| CN110380061B (en) * | 2019-07-03 | 2021-05-11 | 上海交通大学 | A fuel cell diffusion layer matched to all working conditions and preparation method thereof |
| CN114267845B (en) * | 2021-11-26 | 2023-11-14 | 武汉氢能与燃料电池产业技术研究院有限公司 | Fuel cell gas diffusion layer and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4687607A (en) * | 1982-10-01 | 1987-08-18 | Kureha Kagaku Kogyo Kabushiki Kaisha | Process for producing electrode substrate for use in fuel cells |
| CN101000961A (en) * | 2006-01-13 | 2007-07-18 | 三星Sdi株式会社 | Electrode for fuel cell, method of producing the same, and fuel cell including the electrode |
| CN101558519A (en) * | 2006-11-08 | 2009-10-14 | Bdfip控股有限公司 | Electrocatalyst layers for fuel cells and methods of making electrocatalyst layers for fuel cells |
| CN105229833A (en) * | 2013-05-10 | 2016-01-06 | 三菱丽阳株式会社 | Porous electrode base material, its manufacture method and polymer electrolyte fuel cell |
| WO2017064443A1 (en) * | 2015-10-16 | 2017-04-20 | Hexcel Reinforcements | Low-weight needled fabric, method for the production thereof and use of same in a diffusion layer for a fuel cell |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4687607A (en) * | 1982-10-01 | 1987-08-18 | Kureha Kagaku Kogyo Kabushiki Kaisha | Process for producing electrode substrate for use in fuel cells |
| CN101000961A (en) * | 2006-01-13 | 2007-07-18 | 三星Sdi株式会社 | Electrode for fuel cell, method of producing the same, and fuel cell including the electrode |
| CN101558519A (en) * | 2006-11-08 | 2009-10-14 | Bdfip控股有限公司 | Electrocatalyst layers for fuel cells and methods of making electrocatalyst layers for fuel cells |
| CN105229833A (en) * | 2013-05-10 | 2016-01-06 | 三菱丽阳株式会社 | Porous electrode base material, its manufacture method and polymer electrolyte fuel cell |
| WO2017064443A1 (en) * | 2015-10-16 | 2017-04-20 | Hexcel Reinforcements | Low-weight needled fabric, method for the production thereof and use of same in a diffusion layer for a fuel cell |
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