CN109921033B - A kind of preparation method of fuel cell membrane electrode - Google Patents
A kind of preparation method of fuel cell membrane electrode Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 210000000170 cell membrane Anatomy 0.000 title claims description 5
- 239000012528 membrane Substances 0.000 claims abstract description 69
- 238000000034 method Methods 0.000 claims abstract description 56
- 239000002002 slurry Substances 0.000 claims abstract description 54
- 239000003054 catalyst Substances 0.000 claims abstract description 47
- 238000009792 diffusion process Methods 0.000 claims abstract description 47
- 238000000576 coating method Methods 0.000 claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 claims abstract description 31
- 239000003792 electrolyte Substances 0.000 claims abstract description 25
- 239000011248 coating agent Substances 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 19
- 238000001035 drying Methods 0.000 claims abstract description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 30
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 21
- UQSQSQZYBQSBJZ-UHFFFAOYSA-N fluorosulfonic acid Chemical compound OS(F)(=O)=O UQSQSQZYBQSBJZ-UHFFFAOYSA-N 0.000 claims description 21
- 229920005989 resin Polymers 0.000 claims description 21
- 239000011347 resin Substances 0.000 claims description 21
- 239000004693 Polybenzimidazole Substances 0.000 claims description 17
- 229920002480 polybenzimidazole Polymers 0.000 claims description 17
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 15
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 15
- 238000005507 spraying Methods 0.000 claims description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 13
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 12
- 239000000839 emulsion Substances 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 11
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- 229920000554 ionomer Polymers 0.000 claims description 7
- -1 polytetrafluoroethylene Polymers 0.000 claims description 7
- 238000007650 screen-printing Methods 0.000 claims description 6
- 239000012943 hotmelt Substances 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 4
- 239000004642 Polyimide Substances 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 239000002033 PVDF binder Substances 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 2
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 26
- 230000008901 benefit Effects 0.000 abstract description 7
- 210000004027 cell Anatomy 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
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- 238000006243 chemical reaction Methods 0.000 description 2
- 238000003487 electrochemical reaction Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
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- 239000004917 carbon fiber Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
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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
- 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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- Inert Electrodes (AREA)
- Fuel Cell (AREA)
Abstract
一种燃料电池膜电极的制备方法，所述的制备方法具备以下工序：(a)将阴极催化剂浆液和阳极催化剂浆液分别涂覆于平板状带有微孔层的气体扩散层的微孔层一侧表面上，干燥后形成阴极气体扩散电极和阳极气体扩散电极；(b)将电解质涂覆于上述(a)步骤得到的阴极气体扩散电极和/或阳极气体扩散电极的催化剂一侧表面上；(c)将(b)步骤得到的阴极气体扩散电极和阳极气体扩散电极分别置于支撑材料的二侧，阴极气体扩散电极或阳极气体扩散电极电解质涂覆一侧表面或催化剂一侧表面面向支撑材料，并与平板状支撑材料贴合成一体，形成膜电极。这种新工艺兼顾CCM和GDE工艺的优点，可以显著提高膜电极的性能和寿命，同时具有较低的生产成本。A preparation method of a membrane electrode for a fuel cell, the preparation method comprises the following steps: (a) respectively coating a cathode catalyst slurry and an anode catalyst slurry on the microporous layer of a flat gas diffusion layer with a microporous layer; On the side surface, the cathode gas diffusion electrode and the anode gas diffusion electrode are formed after drying; (b) the electrolyte is coated on the catalyst side surface of the cathode gas diffusion electrode and/or the anode gas diffusion electrode obtained in the above (a) step; (c) placing the cathode gas diffusion electrode and the anode gas diffusion electrode obtained in the step (b) on two sides of the support material, respectively, the cathode gas diffusion electrode or the anode gas diffusion electrode electrolyte coating side surface or the catalyst side surface facing the support material, and is combined with a flat support material to form a membrane electrode. This new process takes into account the advantages of both CCM and GDE processes, and can significantly improve the performance and lifetime of membrane electrodes with lower production costs.
Description
Technical Field
The invention belongs to the technical field of fuel cells, and particularly relates to a preparation method of a fuel cell membrane electrode.
Background
The fuel cell is a power generation device which directly converts chemical energy into electric energy through electrochemical reaction, has the characteristics of high energy conversion efficiency, environmental friendliness and the like, and is considered as a clean and efficient power generation technology which is the first choice in the 21 st century.
Membrane electrodes are the site where electrochemical reactions occur, where the chemical energy in the fuel is directly converted into electrical energy. The membrane electrode is generally formed by stacking five layers of a cathode gas diffusion layer, a cathode catalyst layer, a proton exchange membrane, an anode catalyst layer, and an anode gas diffusion layer. The preparation method of the membrane electrode is divided into two methods, namely coating the catalyst on the proton exchange membrane (CCM process) and coating the catalyst on the gas diffusion layer (GDE process). The CCM process has the main advantages of excellent interface structure of the proton exchange membrane and the catalyst layer and higher discharge performance; the defects are that the process is high in difficulty and low in production efficiency, which is mainly determined by the operability of the proton exchange membrane, the perfluorosulfonic acid resin is easy to swell under the action of water or an alcohol solution, the size is increased in the coating process to cause more defects, the polybenzimidazole membrane soaked in acid contains a large amount of phosphoric acid, and a catalyst cannot be coated on the membrane. The GDE process has the main advantages that the coating operability of the substrate is good, the volume change is avoided in the coating process, the quality of the formed catalyst layer is high, and the main problem is that the proton exchange membrane and the catalyst layer interface are constructed by means of later hot pressing operation, so that the performance and the stability are poor. At present, the modification in the prior art mainly focuses on the two processes, and the two aspects of performance, production efficiency and quality cannot be considered at the same time.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and aims to provide a method for manufacturing a membrane electrode of a fuel cell. Combining the advantages of the CCM process and the GDE process, firstly, the GDE process is utilized to realize high-quality and high-speed preparation of the catalyst layer, then, a layer of electrolyte is coated on the surface of the GDE electrode to construct a catalyst layer and an electrolyte membrane interface with excellent performance, and finally, the membrane electrode preparation is completed through the pressing process. The new process has the advantages of both CCM and GDE, and can raise the performance and service life of membrane electrode obviously and lower production cost.
The invention is realized by adopting the following technical scheme:
a method for preparing a membrane electrode for a fuel cell, the method comprising the steps of:
(a) respectively coating cathode catalyst slurry and anode catalyst slurry on the surface of one side of a microporous layer of a flat-plate-shaped gas diffusion layer with the microporous layer, and drying to form a cathode gas diffusion electrode and an anode gas diffusion electrode;
(b) coating an electrolyte on the catalyst-side surface of the cathode gas diffusion electrode and/or the anode gas diffusion electrode obtained in the above (a);
(c) and (c) respectively placing the cathode gas diffusion electrode and the anode gas diffusion electrode obtained in the step (b) on two sides of a support material, wherein the electrolyte coating side surface of the cathode gas diffusion electrode or the anode gas diffusion electrode or the catalyst side surface faces the support material and is adhered with a flat support material into a whole to form a membrane electrode. According to the manufacturing method, the prepared membrane electrode has the advantages of both CCM and GDE processes, has excellent electrolyte membrane and catalyst layer interfaces, and has good production operability. Thus, the performance and the service life of the membrane electrode are improved, and meanwhile, the production cost is lower.
Wherein the coating process in the step (a) is one or more of a spraying method, a coating method and a screen printing method.
According to the manufacturing method, the coating process is further defined, which is beneficial to obtaining a high-quality catalyst layer coating, and further improves the performance, the service life and the consistency of the membrane electrode.
When the coating process is a spraying method, the parameters of the slurry are preferably that the viscosity is less than 100mPas, the solid content of the slurry is less than 5 percent, and the solvent in the components of the slurry comprises one or more than two of water, ethylene glycol, propylene glycol, n-propanol, isopropanol and ethanol; the optimized technological parameters are that the single spraying amount of the catalyst is 0.025-0.25mgcm-2The spraying times are two or more than three.
According to the manufacturing method, when the coating process is a spraying method, optimized research is carried out on slurry parameters and process parameters, so that the quality of the spraying process is further improved, the generation of cracks of the catalyst layer is avoided, an excellent interface of the catalyst layer and the microporous layer is constructed, the operability of the spraying process is better, and the performance, the service life and the consistency of the membrane electrode are further improved.
When the coating process is a coating method or a screen printing method, the parameters of the slurry are preferably in the viscosity range of 800-5000mPas, the solid content of the slurry is 5-50%, and the solvent adopted by the components of the slurry comprises one or more than two of water, ethylene glycol, propylene glycol, n-propanol, isopropanol and ethanol; the preferable technological parameters are that the single application amount of the catalyst is 0.1-8mgcm-2The number of coating times is one or more than two.
According to the manufacturing method, when the coating process is a coating method or a screen printing method, the slurry parameters and the process parameters are optimized, the production efficiency is improved, and the excellent catalyst layer and microporous layer interface are constructed.
A more preferred embodiment of the slurry parameters is a viscosity range of 2000-4000mPas, no ionomer is included in the slurry components and the temperature of the slurry is 40-80 ℃. According to the manufacturing method, the further optimization of the viscosity of the slurry is beneficial to solving the problem of catalyst permeation, when the viscosity of the slurry is higher, the catalyst is not easy to permeate into the microporous layer of the gas diffusion layer, the catalyst utilization efficiency is higher, the leveling property of the slurry under the viscosity is better, and the catalytic layer quality is higher. When the catalyst layer does not contain ionomer, void structures can be formed in the catalyst layer, the void structures can be partially used as a channel for high-speed gas transmission during reaction, and part of the void structures can be partially filled with electrolyte in the next procedure, so that the formation of an ion conductive network is facilitated, and the electrode performance is improved. The adjustment of the slurry temperature helps to obtain a high-quality catalyst layer without containing ionomer in the slurry, and the higher slurry temperature can inhibit the stress imbalance phenomenon in the slurry drying process and reduce the proportion of large-size cracks formed on the catalyst layer.
Wherein the electrolyte in the step (b) is one of perfluorosulfonic acid resin emulsion, hot-melt extruded perfluorosulfonic acid resin, a mixture of phosphoric acid, polybenzimidazole and dimethylacetamide (the mass ratio is 1:0.01-1:1-50) and a phosphoric acid solution. According to the manufacturing method, the electrolyte in the step (b) is thinned, so that the manufacturing method can be applied to proton exchange membrane fuel cells and membrane electrodes of high-temperature proton exchange membrane fuel cells.
Wherein the viscosity of the perfluorosulfonic acid resin emulsion is preferably in the range of 1000-5000 mPas.
According to the manufacturing method, the viscosity of the perfluorosulfonic acid resin emulsion is optimized, and within the viscosity range, a proton exchange membrane with higher quality is obtained, the probability of uneven coating of the proton exchange membrane is reduced, and the phenomenon of internal stringing is avoided.
Wherein the viscosity of the mixture of the phosphoric acid, the polybenzimidazole and the dimethylacetamide is preferably in the range of 1000-5000 mPas.
According to the preparation method, the viscosity of the mixture of the phosphoric acid, the polybenzimidazole and the dimethylacetamide is optimized, and in the viscosity range, a high-temperature proton exchange membrane with higher quality is obtained, the probability of uneven coating of the proton exchange membrane is reduced, and the phenomenon of inner string is avoided.
When the more preferable embodiment of the slurry parameter is the viscosity range of 2000-4000mPas, the slurry component does not contain ionomer, and the temperature of the slurry is 40-80 ℃, wherein the electrolyte in the step (b) is one of perfluorosulfonic acid resin emulsion, hot-melt extruded perfluorosulfonic acid resin, a mixture of phosphoric acid, polybenzimidazole and dimethylacetamide, and phosphoric acid solution, wherein the viscosity of the mixture of perfluorosulfonic acid resin emulsion, phosphoric acid, polybenzimidazole and dimethylacetamide is preferably in the range of 50-1000 mPas.
According to this production method, the viscosity of the electrolyte solution is preferably selected so that the electrolyte having the viscosity partially penetrates into the pores of the catalytic layer electrode, thereby contributing to the formation of the ionic conduction network of the catalytic layer and further improving the performance and life of the membrane electrode.
Wherein the support material in the step (c) is one of porous polytetrafluoroethylene, porous polyvinylidene fluoride, porous polyimide, porous polybenzimidazole, polyethylene terephthalate, porous polyethylene, perfluorosulfonic acid resin and polybenzimidazole.
According to the manufacturing method, the support materials are optimized, and have excellent stability, wherein the polyimide material and the polybenzimidazole material have excellent thermal stability and can meet the use requirement of the high-temperature proton exchange membrane fuel cell.
Detailed Description
The following will further describe a method for manufacturing a fuel cell membrane electrode, and a fuel cell according to the present invention with reference to examples.
Example 1
A method for preparing a membrane electrode for a fuel cell, the method comprising the steps of:
(a) respectively coating cathode catalyst slurry and anode catalyst slurry on the surface of one side of a microporous layer of a flat-plate-shaped gas diffusion layer with the microporous layer, and drying to form a cathode gas diffusion electrode and an anode gas diffusion electrode;
(b) coating an electrolyte on the catalyst-side surface of the cathode gas diffusion electrode and/or the anode gas diffusion electrode obtained in the above (a);
(c) and (c) respectively placing the cathode gas diffusion electrode and the anode gas diffusion electrode obtained in the step (b) on two sides of a support material, wherein the electrolyte coating side surface of the cathode gas diffusion electrode or the anode gas diffusion electrode or the catalyst side surface faces the support material and is adhered with a flat support material into a whole to form a membrane electrode.
Comparative example 1
A method for preparing a membrane electrode for a fuel cell, the method comprising the steps of:
(a) respectively coating the cathode catalyst slurry and the anode catalyst slurry on a gas diffusion layer with a microporous layer, and drying to form a cathode gas diffusion electrode and an anode gas diffusion electrode;
(b) and (c) integrally bonding the gas diffusion electrode obtained in the step (a) and an electrolyte membrane to form a membrane electrode.
Comparative example 2
A method for preparing a membrane electrode for a fuel cell, the method comprising the steps of:
(a) respectively coating the cathode catalyst slurry and the anode catalyst slurry on a proton exchange membrane to obtain a CCM electrode;
(b) and (c) bonding the CCM electrode obtained in the step (a) and the gas diffusion layer into a whole to form a membrane electrode.
Using the same electrolyte, catalyst slurry and gas diffusion layer, wherein the electrolyte is perfluorosulfonic acid resin; the catalyst slurry is Pt/C (Pt content is 50 wt.%), the catalyst is dispersed in a mixed solvent of propanol and water (mass ratio is 1:1), the ionomer is perfluorosulfonic acid resin (mass ratio to Pt/C is 1: 2), and the total solid content is 15%; the gas diffusion layer is carbon fiber paper. The raw materials, process parameters and equipment used by the membrane electrode are ensured to be the same as possible, no less than 100 membrane electrodes are prepared, the performances of the membrane electrodes are compared, and the results are shown in the following table:
| process for the preparation of a coating | Performance of | Life span | Production efficiency | Probability of inner string failure |
| Example 1 | 100％ | 100％ | 100％ | 0％ |
| Comparative example 1 | 57％ | 78％ | 112％ | 3％ |
| Comparative example 2 | 98％ | 93％ | 83％ | 1％ |
As can be seen from the above comparison results, example 1 has a better technical advantage.
Example 2
The method of preparing a membrane electrode according to example 1, wherein the coating process in the step (a) is a spray coating method.
Example 3
The method of preparing a membrane electrode according to embodiment 1, wherein the coating process in the step (a) is a coating method.
Example 4
The method of preparing a membrane electrode according to embodiment 1, wherein the coating process in the process (a) is a screen printing method.
Example 5
The method for preparing a membrane electrode according to example 1, wherein the coating process in the step (a) is a spraying method and then a coating method.
Example 6
The membrane electrode preparation method as described in example 2, the slurry viscosity was 90mPas, the slurry solid content was 4.7%, the solvent used in the slurry components contained three types of water, ethylene glycol, n-propanol, the mass ratio was 1:1.2: 1; the optimized technological parameters are that the single spraying amount of the catalyst is 0.1mgcm-2The number of spraying was 5. The process parameters can be used to obtain the best orthogonality between electrode performance and cost, and production efficiency when the parameters are modulated in the method described in embodiment 2.
Example 7
The membrane electrode preparation method of example 3, slurry viscosity was 5000mPas, slurry solid content was 50%, slurry components contained three kinds of water, ethylene glycol, n-propanol, mass ratio was 1:1.2: 1; preferred process parameters are a single application of 0.13mgcm of catalyst-2The number of coating times was 2.
Example 8
The membrane electrode preparation method of example 3, slurry viscosity was 3000mPas, slurry solid content was 24%, slurry components contained three kinds of water, ethylene glycol, n-propanol, mass ratio was 1:1.2: 1; preferred process parameters are a single application of 0.13mgcm of catalyst-2The number of coating times was 2. The process parameters can be used to obtain the best orthogonality between electrode performance and cost, and production efficiency when the parameters are modulated in the method described in embodiment 3.
Example 9
The membrane electrode preparation process of example 8, wherein the slurry composition did not contain ionomer and the slurry temperature was 60 ℃. The comprehensive indexes of the membrane electrode performance, consistency and cost prepared by the process parameters are further improved compared with those of the embodiment 8.
Example 10
The method of preparing a membrane electrode according to embodiment 1, wherein the electrolyte in the step (b) is a hot-melt extruded perfluorosulfonic acid resin.
Example 11
The method of making a membrane electrode of example 1 wherein said electrolyte is perfluorosulfonic acid resin emulsion having a viscosity of 2578 mPas.
Example 12
The method for preparing a membrane electrode according to claim 1, wherein the electrolyte is a mixture of phosphoric acid, polybenzimidazole and dimethylacetamide and has a viscosity of 3452 mPas.
Example 13
The method of preparing a membrane electrode according to example 9, wherein the electrolyte in the step (b) is a perfluorosulfonic acid resin emulsion having a viscosity of 117 mPas.
Example 14
The method of preparing a membrane electrode according to example 1, wherein the support material in step (c) is porous polytetrafluoroethylene.
Example 15
The method of preparing a membrane electrode according to example 1, wherein the support material in step (c) is porous polybenzimidazole.
In addition, other modifications within the spirit of the invention will occur to those skilled in the art, and it is understood that such modifications are included within the scope of the invention as claimed.
Claims (10)
1. A preparation method of a fuel cell membrane electrode is characterized by comprising the following steps: the preparation method comprises the following steps:
(a) respectively coating cathode catalyst slurry and anode catalyst slurry on the surface of one side of a microporous layer of a flat-plate-shaped gas diffusion layer with the microporous layer, and drying to form a cathode gas diffusion electrode and an anode gas diffusion electrode;
(b) coating an electrolyte on the catalyst-side surface of the cathode gas diffusion electrode and/or the anode gas diffusion electrode obtained in the above (a);
(c) and (c) respectively placing the cathode gas diffusion electrode and the anode gas diffusion electrode obtained in the step (b) on two sides of a support material, wherein the electrolyte coating side surface of the cathode gas diffusion electrode or the anode gas diffusion electrode or the catalyst side surface faces the support material and is adhered with a flat support material into a whole to form a membrane electrode.
2. The method for producing a membrane electrode according to claim 1, wherein: wherein the coating process in the step (a) is one or more of a spraying method, a coating method and a screen printing method.
3. The method for producing a membrane electrode according to claim 2, wherein: when the coating process is a spraying method, the parameters of the slurry are that the viscosity is less than 100mPas, the solid content of the slurry is less than 5 percent, and the solvent in the components of the slurry comprises one or more than two of water, ethylene glycol, propylene glycol, n-propanol, isopropanol and ethanol; the technological parameters are that the single spraying amount of the catalyst is 0.025-0.25mgcm-2The spraying times are two or more than three.
4. The method for producing a membrane electrode according to claim 2, wherein: when the coating process is a coating method or a screen printing method, the parameter of the slurry is the viscosity range of 800-5000mPas, the solid content of the slurry is 5-50%, and the solvent adopted by the components of the slurry comprises one or more than two of water, ethylene glycol, propylene glycol, n-propanol, isopropanol and ethanol; the technological parameters are that the single application amount of the catalyst is 0.1-8mgcm-2The number of coating times is one or more than two.
5. The method for producing a membrane electrode according to claim 4, wherein: the slurry parameters were programmed to a viscosity range of 2000-4000mPas, with no ionomer in the slurry components and a temperature of 40-80 ℃.
6. The method for producing a membrane electrode according to claim 1, wherein: wherein the electrolyte in the step (b) is one of perfluorosulfonic acid resin emulsion, hot-melt extruded perfluorosulfonic acid resin, a mixture of phosphoric acid, polybenzimidazole and dimethylacetamide and a phosphoric acid solution.
7. The method for preparing a membrane electrode according to claim 6, wherein the viscosity of the perfluorosulfonic acid resin emulsion is in the range of 1000-5000 mPas.
8. The method for producing a membrane electrode according to claim 6, wherein: wherein the viscosity range of the mixture of the phosphoric acid, the polybenzimidazole and the dimethylacetamide is 1000-5000 mPas.
9. The method for producing a membrane electrode according to claim 5, wherein: wherein the electrolyte in the step (b) is one of perfluorosulfonic acid resin emulsion, hot-melt extruded perfluorosulfonic acid resin, a mixture of three substances of phosphoric acid, polybenzimidazole and dimethylacetamide and a phosphoric acid solution, wherein the viscosity of the mixture of the perfluorosulfonic acid resin emulsion, the three substances of phosphoric acid, polybenzimidazole and dimethylacetamide ranges from 50 to 1000 mPas.
10. The method for producing a membrane electrode according to claim 1, wherein: wherein the support material in the step (c) is one of porous polytetrafluoroethylene, porous polyvinylidene fluoride, porous polyimide, porous polybenzimidazole, polyethylene terephthalate, porous polyethylene, perfluorosulfonic acid resin and polybenzimidazole.
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| CN111244478B (en) * | 2020-01-20 | 2021-08-31 | 鸿基创能科技(广州)有限公司 | Method for preparing crack-free catalyst coating film, catalyst coating film and membrane electrode |
| CN113346114A (en) * | 2020-03-02 | 2021-09-03 | 上海交通大学 | Integrated membrane electrode and preparation method thereof |
| CN113346115A (en) * | 2020-03-02 | 2021-09-03 | 上海交通大学 | Enhanced integrated membrane electrode and preparation method thereof |
| CN112447987B (en) * | 2020-11-27 | 2022-06-28 | 上海交通大学 | An integrated membrane electrode preparation method that can meet different enhancement requirements |
| CN112838251A (en) * | 2021-01-25 | 2021-05-25 | 武汉绿知行环保科技有限公司 | Fuel cell membrane electrode and preparation method thereof |
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