CN117174972A - Membrane electrode for high-temperature proton exchange membrane fuel cell and preparation method and equipment thereof - Google Patents
Membrane electrode for high-temperature proton exchange membrane fuel cell and preparation method and equipment thereof Download PDFInfo
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- CN117174972A CN117174972A CN202310881857.8A CN202310881857A CN117174972A CN 117174972 A CN117174972 A CN 117174972A CN 202310881857 A CN202310881857 A CN 202310881857A CN 117174972 A CN117174972 A CN 117174972A
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- 239000012528 membrane Substances 0.000 title claims abstract description 108
- 239000000446 fuel Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000003054 catalyst Substances 0.000 claims abstract description 36
- 239000011248 coating agent Substances 0.000 claims abstract description 33
- 238000000576 coating method Methods 0.000 claims abstract description 33
- 229910000510 noble metal Inorganic materials 0.000 claims abstract description 25
- 238000010008 shearing Methods 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000009792 diffusion process Methods 0.000 claims description 39
- 239000011267 electrode slurry Substances 0.000 claims description 37
- 239000002904 solvent Substances 0.000 claims description 22
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 21
- 229910021642 ultra pure water Inorganic materials 0.000 claims description 21
- 239000012498 ultrapure water Substances 0.000 claims description 21
- 238000001035 drying Methods 0.000 claims description 19
- 239000002245 particle Substances 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 10
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 9
- 239000006185 dispersion Substances 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 8
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 6
- 238000007731 hot pressing Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 229920001875 Ebonite Polymers 0.000 claims description 3
- 229920000557 Nafion® Polymers 0.000 claims description 3
- 239000002033 PVDF binder Substances 0.000 claims description 3
- 239000004693 Polybenzimidazole Substances 0.000 claims description 3
- 229920002480 polybenzimidazole Polymers 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 6
- 230000003197 catalytic effect Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 33
- 210000004027 cell Anatomy 0.000 description 31
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 11
- 239000000203 mixture Substances 0.000 description 9
- 238000009434 installation Methods 0.000 description 7
- 238000011068 loading method Methods 0.000 description 6
- 239000000306 component Substances 0.000 description 4
- 238000009472 formulation Methods 0.000 description 3
- 210000000170 cell membrane Anatomy 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000001132 ultrasonic dispersion Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000002604 ultrasonography Methods 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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Abstract
The invention discloses a membrane electrode for a high-temperature proton exchange membrane fuel cell and a preparation method and equipment thereof, and the membrane electrode comprises a configuration box, wherein a sealing plate is fixedly connected to the inside of the configuration box, a motor is fixedly arranged on the lower inner wall of the configuration box, a rotating rod is fixedly connected to the output end of the motor and penetrates through the sealing plate, a plurality of fixing shafts are arranged on the outer side of the rotating rod and are connected with the rotating rod, a plurality of shearing blades are fixedly connected to the side wall of each fixing shaft, and an ultrasonic vibrator is fixedly arranged on the side wall of each fixing shaft. The invention uses the catalyst with higher noble metal content, is beneficial to reducing the thickness of the coating under the condition of the same noble metal content, thereby improving the coating quality, being helpful for improving the battery performance, reducing the catalyst consumption, reducing the total number of the catalytic active sites, reducing the thickness of the coating, and being capable of ensuring the good battery performance by matching with the adjustment of other later processes.
Description
Technical Field
The invention relates to the field of membrane electrodes for fuel cells, in particular to a membrane electrode for a high-temperature proton exchange membrane fuel cell, and a preparation method and equipment thereof.
Background
Fuel cells are of great interest as an important application for hydrogen energy. The membrane electrode is used as a core component of the fuel cell, and the preparation process directly influences the performance, cost and service life of the whole cell stack. At present, a low-temperature proton exchange membrane fuel cell membrane electrode has been studied more, but concerns about a high-temperature proton exchange membrane fuel cell membrane electrode are very little.
Unlike the membrane electrode structure of the low temperature proton exchange membrane fuel cell, the catalytic layer of the membrane electrode of the high temperature proton exchange membrane fuel cell is generally designed on the gas diffusion layer, not on both sides of the proton exchange membrane. Therefore, the high temperature proton exchange membrane fuel cell is often prepared using a Gas Diffusion Electrode (GDE) process rather than a Catalyst Coated Membrane (CCM) process.
However, the traditional GDE process has the problems of high resistance and low power density, severely restricts the application of the high-temperature proton exchange membrane fuel cell, and has high catalyst consumption (about 2-5 mg/cm < 2 >) in order to ensure the catalytic activity of the membrane electrode, so that the manufacturing cost of the cell is high, and therefore, a new preparation process is urgently needed, and the high-temperature proton exchange membrane fuel cell has better cell performance under the condition of realizing lower catalyst consumption.
Disclosure of Invention
The invention aims to solve the defects existing in the prior art, such as: the high-temperature proton exchange membrane fuel cell has high resistance and low power density, severely restricts the application of the high-temperature proton exchange membrane fuel cell, has high catalyst consumption, and ensures that the manufacturing cost of the cell is high.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the preparation equipment of membrane electrode for high temperature proton exchange membrane fuel cell, including the configuration case, the inside fixedly connected with closing plate of configuration case, fixedly provided with motor on the lower inner wall of configuration case, the output fixedly connected with rotary rod of motor, the rotary rod runs through the closing plate setting, the outside of rotary rod is provided with many fixed axles, and is many the fixed axle all is connected with the rotary rod, every equal fixedly connected with multi-disc shearing sword on the lateral wall of fixed axle, fixedly provided with ultrasonic vibrator on the lateral wall of fixed axle, the top of fixed axle is provided with the connecting axle, every the equal fixedly connected with fixed gear in top of connecting axle, fixedly connected with fixed ring gear on the upper inner wall of configuration case, fixed ring gear and every fixed gear homophase meshing.
Preferably, every connecting cavity has been seted up to the inside bottom department of fixed axle, every connecting cavity's inside sliding connection has the movable plate, every the bottom fixedly connected with connecting rod of movable plate, every the connecting rod runs through the lower inner wall of connecting cavity and stretches out the outside setting of fixed axle, every the equal fixedly connected with of bottom of connecting rod connects the cushion, every the bottom of connecting the cushion all pastes the setting mutually with the top of closing plate, every the top fixedly connected with connecting spring of movable plate, every connecting spring keeps away from the one end fixedly connected with of corresponding movable plate on the upper inner wall of connecting cavity, the smooth setting in surface of connecting the cushion, just it adopts hard rubber to make to connect the cushion.
Preferably, the sliding groove is formed in the top end of the inner portion of the fixed shaft, the connecting shaft penetrates through the upper inner wall of the sliding groove and extends out of the inner portion of the sliding groove, the connecting shaft is in sliding connection with the inner wall of the sliding groove, an elastic rod is fixedly connected to the bottom end of the connecting shaft, and one end, far away from the connecting shaft, of the elastic rod is fixedly connected to the lower inner wall of the sliding groove.
Preferably, a plurality of installation rods are fixedly connected to the side wall of the rotating rod, each installation rod corresponds to one fixed shaft respectively, an installation sleeve is fixedly connected to the tail end of each installation rod, and each installation sleeve is rotatably sleeved on the outer side of one fixed shaft.
The preparation method of the membrane electrode for the high-temperature proton exchange membrane fuel cell comprises the following steps:
s1, mixing and stirring a catalyst, ultrapure water, a solvent and resin to prepare a membrane electrode slurry, wherein the catalyst is a Pt-based noble metal carbon supported catalyst, the noble metal content of the catalyst is more than 40%, and the ratio of the solvent to the ultrapure water is (1-4): (6-9), wherein the solid content of the membrane electrode slurry is 5-20%;
s2, performing dispersion treatment on the membrane electrode slurry, controlling the temperature to be 5-15 ℃ to enable the particle size of the membrane electrode slurry D50 to be 0.5-1.5 microns, then coating the membrane electrode slurry on a gas diffusion layer in a slit coating mode to obtain a gas diffusion coating, and performing drying treatment to obtain a gas diffusion electrode with the noble metal content of 0.5-2 mg/cm < 2 >;
and S3, respectively placing the two gas diffusion electrodes on two sides of the high-temperature proton exchange membrane, and combining the two gas diffusion electrodes with the sealing piece in a hot pressing, bonding or sticking mode to obtain the high-temperature proton exchange membrane electrode.
Preferably, the thickness of the gas diffusion coating is 0.05-0.75 mm, and the drying treatment temperature is 50-100 ℃ and the drying treatment time is 1-15min.
Preferably, the solvent is at least one of methanol, ethanol, diethyl ether, n-propanol and isopropanol, the resin is at least one of PTFE, PVDF, PBI, nafion, PVA, and the dispersion treatment is at least one of ultrasound, high-speed shearing, high-pressure shearing and high-pressure micro-jet.
Preferably, the cathode and anode end plates and the cathode and anode electrode plates are respectively arranged at two sides of the high-temperature proton exchange membrane electrode and matched with the sealing piece together, and are assembled into the high-temperature proton exchange membrane fuel cell through mechanical pressing.
Compared with the prior art, the invention has the beneficial effects that:
1. the catalyst with higher noble metal content is beneficial to reducing the thickness of the coating under the condition of the same noble metal content, thereby improving the coating quality, helping to improve the battery performance, reducing the catalyst dosage, reducing the total number of catalytic active sites, reducing the thickness of the coating, and ensuring the good battery performance by matching with the adjustment of other later processes.
2. The use of a formulation with a low solvent to ultrapure water ratio is beneficial for the mixing and stirring of the membrane electrode slurry and is safer to prepare than a formulation with a high solvent to ultrapure water ratio when the slurry is prepared.
3. The use of a low solvent to ultrapure water ratio formulation is beneficial to uniformity during drying at moderate coating thicknesses.
4. The dispersion treatment mode of ultrasonic shearing is adopted, the D50 particle size is controlled to be about 0.5-1.5 microns, and the particle size is beneficial to the improvement of the battery performance.
5. The device rotates the shearing knife through ultrasonic waves, stirs and shears particles in the solvent, and the shearing knife rotates and rotates, so that the shearing effect is greatly improved.
Drawings
FIG. 1 is a schematic structural diagram of a membrane electrode manufacturing apparatus for a high temperature proton exchange membrane fuel cell according to the present invention;
FIG. 2 is an enlarged view of FIG. 1 at A;
fig. 3 is a schematic diagram of a three-dimensional structure of a shearing blade of a membrane electrode manufacturing device for a high-temperature proton exchange membrane fuel cell according to the present invention;
in the figure: 1 configuration case, 2 closing plate, 3 motor, 4 rotary rod, 5 fixed axle, 6 shearing knife, 7 connecting axle, 8 sliding tray, 9 fixed gear, 10 fixed ring gear, 11 ultrasonic vibrator, 12 connecting rod, 13 connecting chamber, 14 movable plate, 15 connecting spring, 16 connecting cushion, 17 installation pole, 18 installation sleeve.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1-3, the preparation equipment of the membrane electrode for the high temperature proton exchange membrane fuel cell comprises a configuration box 1, wherein a sealing plate 2 is fixedly connected to the inside of the configuration box 1, a motor 3 is fixedly arranged on the lower inner wall of the configuration box 1, a rotating rod 4 is fixedly connected to the output end of the motor 3, the rotating rod 4 penetrates through the sealing plate 2, a plurality of fixed shafts 5 are arranged on the outer side of the rotating rod 4, the fixed shafts 5 are connected with the rotating rod 4, a plurality of shearing blades 6 are fixedly connected to the side wall of each fixed shaft 5, an ultrasonic vibrator 11 is fixedly arranged on the side wall of each fixed shaft 5, a connecting shaft 7 is arranged at the top end of each fixed shaft 5, a fixed gear 9 is fixedly connected to the top end of each connecting shaft 7, a fixed gear 10 is meshed with each fixed gear 9, membrane electrode slurry is introduced into the configuration box 1, the motor 3 is started, the output end of the motor 3 drives the rotating rod 4, so that the fixed shafts 5 rotate around the rotating rod 4, the shearing blades 6 rotate, and simultaneously, the connecting shafts 7 rotate along with the shearing blades 6, the fixed gears 9 rotate along with the rotating shafts, the fixed gears 9 rotate around the rotating shafts, the rotating shafts and the shearing blades 10 rotate around the rotating shafts, the fixed gears and vibrate the shearing blades 6, and mix the vibration components evenly, and then the vibration is carried out on the shearing blades, and the vibration components and the vibration components are mixed;
a connecting cavity 13 is formed in the bottom end of the inside of each fixed shaft 5, a movable plate 14 is connected in each connecting cavity 13 in a sliding manner, a connecting rod 12 is fixedly connected to the bottom end of each movable plate 14, each connecting rod 12 penetrates through the lower inner wall of each connecting cavity 13 and extends out of the fixed shaft 5, a connecting cushion block 16 is fixedly connected to the bottom end of each connecting rod 12, the bottom end of each connecting cushion block 16 is arranged in a manner of being attached to the top end of each sealing plate 2, a connecting spring 15 is fixedly connected to the top end of each movable plate 14, and one end, away from the corresponding movable plate 14, of each connecting spring 15 is fixedly connected to the upper inner wall of each connecting cavity 13; the surface of the connecting cushion block 16 is smooth, the connecting cushion block 16 is made of hard rubber, the connecting rod 12 and the moving plate 14 are matched to enable the fixed shaft 5 to vibrate, the connecting spring 15 can play a role in amplifying vibration, vibration is further improved, and the connecting cushion block 16 can protect the connecting rod 12 from being damaged;
the top end of the inside of the fixed shaft 5 is provided with a sliding groove 8, the connecting shaft 7 penetrates through the upper inner wall of the sliding groove 8 and extends out of the sliding groove 8, the connecting shaft 7 is in sliding connection with the inner wall of the sliding groove 8, the bottom end of the connecting shaft 7 is fixedly connected with an elastic rod, and one end of the elastic rod, which is far away from the connecting shaft 7, is fixedly connected onto the lower inner wall of the sliding groove 8, so that vibration of the fixed shaft 5 cannot influence the connecting shaft 7;
a plurality of mounting rods 17 are fixedly connected to the side wall of the rotary rod 4, each mounting rod 17 corresponds to one fixed shaft 5 respectively, the tail end of each mounting rod 17 is fixedly connected with a mounting sleeve 18, each mounting sleeve 18 is rotatably sleeved on the outer side of one fixed shaft 5, and the rotary rod 4 is connected with the fixed shaft 5;
the membrane electrode for the high-temperature proton exchange membrane fuel cell and the preparation method thereof comprise the following steps:
s1, mixing and stirring a catalyst, ultrapure water, a solvent and resin to prepare a membrane electrode slurry, wherein the catalyst is a Pt-based noble metal carbon supported catalyst, the noble metal content of the catalyst is more than 40%, and the ratio of the solvent to the ultrapure water is (1-4): (6-9), wherein the solid content of the membrane electrode slurry is 5-20%; the solvent can be methanol, ethanol, diethyl ether, n-propanol or isopropanol, and the resin can be PTFE, PVDF, PBI, nafion, PVA;
s2, performing dispersion treatment on the membrane electrode slurry, controlling the temperature to be 5-15 ℃ to enable the particle size of the membrane electrode slurry D50 to be 0.5-1.5 microns, then coating the membrane electrode slurry on a gas diffusion layer in a slit coating mode to obtain a gas diffusion coating, and performing drying treatment to obtain a gas diffusion electrode with the noble metal content of 0.5-2 mg/cm < 2 >;
s3, respectively placing two gas diffusion electrodes on two sides of the high-temperature proton exchange membrane, and combining the two gas diffusion electrodes with a sealing piece in a hot-pressing, bonding or sticking mode to obtain the high-temperature proton exchange membrane electrode;
the thickness of the gas diffusion coating is 0.05-0.75 mm, the drying treatment temperature is 50-100 ℃ and the time is 1-15min; the dispersion treatment is ultrasonic shearing;
embodiment one: with reference to figures 1-3 of the drawings,
low loading, low solvent to ultrapure water ratio, high noble metal content catalyst, ultra-small particle size preparation:
(1) 46% Pt/C catalyst, ultra pure water, isopropyl alcohol and PTFE resin were mixed in a ratio of 2:21:9:1, mixing and stirring the mixture in proportion to prepare membrane electrode slurry;
(2) Performing ultrasonic crushing and dispersing treatment on the membrane electrode slurry for 30 minutes, and controlling the temperature to be 10 ℃;
(3) Coating the dispersed membrane electrode slurry on a gas diffusion layer by using a slit coater, controlling the thickness of the coating to be 0.2-0.4 mm, drying at 80 ℃ for 10 minutes, and drying to obtain the gas diffusion electrode with the noble metal content of about 1 mg/cm < 2 >.
Embodiment two: with reference to figures 1-3 of the drawings,
low loading, low solvent to ultrapure water ratio, high noble metal content catalyst, small particle size preparation:
(1) 46% Pt/C catalyst, ultra pure water, isopropyl alcohol and PTFE resin were mixed in a ratio of 2:21:9:1, mixing and stirring the mixture in proportion to prepare membrane electrode slurry;
(2) Performing ultrasonic dispersion treatment on the membrane electrode slurry for 30 minutes, and controlling the temperature to be 10 ℃;
(3) Coating the dispersed membrane electrode slurry on a gas diffusion layer by using a slit coater, controlling the thickness of the coating to be 0.2-0.4 mm, drying at 80 ℃ for 10 minutes, and drying to obtain the gas diffusion electrode with the noble metal content of about 1 mg/cm < 2 >.
Embodiment III: with reference to figures 1-3 of the drawings,
low loading, low solvent to ultrapure water ratio, low noble metal content catalyst, ultra-small particle size preparation:
(1) 20% Pt/C catalyst, ultra pure water, isopropyl alcohol and PTFE resin were mixed in a ratio of 1.2:15.9:6.8:1, mixing and stirring the mixture in proportion to prepare membrane electrode slurry;
(2) Performing ultrasonic crushing and dispersing treatment on the membrane electrode slurry for 30 minutes, and controlling the temperature to be 10 ℃;
(3) And coating the membrane electrode slurry subjected to dispersion treatment on a gas diffusion layer by using a slit coater, controlling the thickness of the coating to be 0.8-1.0 mm, then drying at 80 ℃ for 15 minutes, and drying to obtain the gas diffusion electrode with Pt carrying capacity of about 1 mg/cm < 2 >.
Clearly, the use of 20% catalyst at the same platinum loading requirement has a much thicker coating thickness than the coating prepared using 46% pt/C catalyst.
Embodiment four: with reference to figures 1-3 of the drawings,
low loading, general solvent to ultrapure water ratio, noble metal content catalyst, ultra-small particle size preparation:
(1) 46% Pt/C catalyst, ultra pure water, isopropyl alcohol and PTFE resin were mixed in a ratio of 2:9:21:1, mixing and stirring the mixture in proportion to prepare membrane electrode slurry;
(2) Performing ultrasonic crushing and dispersing treatment on the membrane electrode slurry for 30 minutes, and controlling the temperature to be 10 ℃;
(3) Coating the dispersed membrane electrode slurry on a gas diffusion layer by using a slit coater, controlling the thickness of the coating to be 0.2-0.4 mm, drying at 80 ℃ for 10 minutes, and drying to obtain the gas diffusion electrode with the noble metal content of about 1 mg/cm < 2 >.
Fifth embodiment: with reference to figures 1-3 of the drawings,
high loading, general solvent to ultrapure water ratio, low noble metal content catalyst, small particle size preparation:
(1) 20% Pt/C catalyst, ultra pure water, isopropyl alcohol and PTFE resin were mixed in a ratio of 1.2:14:9:1, mixing and stirring the mixture in proportion to prepare membrane electrode slurry;
(2) Performing ultrasonic dispersion treatment on the membrane electrode slurry for 30 minutes, and controlling the temperature to be 10 ℃;
(3) Coating the dispersed membrane electrode slurry on a gas diffusion layer by using a slit coater, controlling the thickness of the coating to be 1.2-1.5 mm, drying at 80 ℃ for 10 minutes, and drying to obtain the gas diffusion electrode with the noble metal content of about 1.5 mg/cm < 2 >.
In the invention, a catalyst, ultrapure water, a solvent and resin are mixed and stirred to prepare a membrane electrode slurry, wherein the catalyst is a Pt-based noble metal carbon supported catalyst, the noble metal content of the catalyst is more than 40%, and the ratio of the solvent to the ultrapure water is (1-4): (6-9), the solid content of the membrane electrode slurry is 5-20%, the membrane electrode slurry is subjected to dispersion treatment, the slurry is fed into the configuration box 1, the motor 3 is started, the output end of the motor 3 drives the rotary rod 4 to rotate, so that a plurality of fixed solids 5 rotate around the rotary rod 4 to drive a plurality of shearing cutters 6 to rotate along with the rotary rod 4, meanwhile, the connecting shaft 7 rotates along with the shearing cutters 6 when rotating, the fixed gear 9 is driven to rotate around the rotary rod 4, the fixed gear 9 rotates when revolving under the action of the fixed gear ring 10, so that the shearing cutters 6 rotate, and after the ultrasonic vibrator 11 is started, the shearing cutters 6 vibrate violently under the cooperation of the connecting rod 12 and the moving plate 14, the connecting spring 15 can play a role in amplifying vibration, vibration is further improved, the solvent is stirred and sheared, all components in the solvent are uniformly mixed, the temperature is controlled to be 5-15 ℃, the particle size of the membrane electrode slurry D50 is 0.5-1.5 microns, then the membrane electrode slurry is coated on a gas diffusion layer in a slit coating mode to obtain a gas diffusion coating, drying treatment is carried out, a gas diffusion electrode with the noble metal content of 0.5-2 mg/cm < 2 >, two pieces of the gas diffusion electrodes are respectively arranged on two sides of a high-temperature proton exchange membrane and are combined together with a sealing piece in a hot pressing, bonding or pasting mode to obtain the high-temperature proton exchange membrane electrode;
taking two gas diffusion electrodes prepared in the first embodiment, wherein each gas diffusion electrode is 5cm & lt 2 & gt, respectively placing the gas diffusion electrodes on two sides of a high-temperature proton exchange membrane, combining the gas diffusion electrodes with a sealing piece together through hot pressing to prepare a membrane electrode, then assembling the membrane electrode, a polar plate, an end plate, the sealing piece and other accessories together into a high-temperature proton exchange membrane fuel cell, marking the high-temperature proton exchange membrane fuel cell as a cell 1, and testing the performance of the high-temperature proton exchange membrane fuel cell;
the gas diffusion electrodes prepared in examples two to comparative examples were assembled into high temperature proton exchange membrane fuel cells, and were designated as cells 2, 3, 4, and 5, respectively, and their performances were tested in the same manner.
The test results are shown below:
it is evident that the cell 1 produced from example one shows a significantly higher power density than the typical cell (less than 0.4W/cm 2).
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (8)
1. The preparation equipment of membrane electrode for high temperature proton exchange membrane fuel cell, including configuration case (1), its characterized in that, the inside fixedly connected with closing plate (2) of configuration case (1), fixedly provided with motor (3) on the lower inner wall of configuration case (1), the output fixedly connected with rotary rod (4) of motor (3), rotary rod (4) run through closing plate (2) setting, the outside of rotary rod (4) is provided with many fixed axles (5), and many fixed axle (5) all are connected with rotary rod (4), every all fixedly connected with multi-disc shear cutter (6) on the lateral wall of fixed axle (5), fixedly provided with ultrasonic vibrator (11) on the lateral wall of fixed axle (5), the top of fixed axle (5) is provided with connecting axle (7), every fixed gear (9) are all fixedly connected with on the upper inner wall of configuration case (1), fixed ring gear (10) mesh with every fixed gear (9).
2. The preparation equipment of membrane electrode for high temperature proton exchange membrane fuel cell according to claim 1, wherein, every connecting cavity (13) has been seted up to the inside bottom department of fixed axle (5), every the inside sliding connection of connecting cavity (13) has movable plate (14), every the bottom fixedly connected with connecting rod (12) of movable plate (14), every connecting rod (12) run through the lower inner wall of connecting cavity (13) and stretch out the outside setting of fixed axle (5), every the bottom of connecting rod (12) all fixedly connected with connection cushion (16), every the bottom of connection cushion (16) all pastes the setting with the top of closing plate (2), every the top fixedly connected with connecting spring (15) of movable plate (14), every connecting spring (15) keep away from the one end fixed connection of corresponding movable plate (14) on the upper inner wall of connecting cavity (13), the surface smoothness of connection cushion (16) sets up, just connection cushion (16) adopts hard rubber to make.
3. The preparation device of the membrane electrode for the high-temperature proton exchange membrane fuel cell according to claim 1, wherein a sliding groove (8) is formed in the top end of the inside of the fixed shaft (5), the connecting shaft (7) penetrates through the upper inner wall of the sliding groove (8) and extends out of the sliding groove (8), the connecting shaft (7) is slidably connected with the inner wall of the sliding groove (8), an elastic rod is fixedly connected with the bottom end of the connecting shaft (7), and one end, far away from the connecting shaft (7), of the elastic rod is fixedly connected with the lower inner wall of the sliding groove (8).
4. The apparatus for preparing a membrane electrode for a high temperature proton exchange membrane fuel cell according to claim 1, wherein a plurality of mounting rods (17) are fixedly connected to a side wall of the rotating rod (4), each mounting rod (17) corresponds to one fixed shaft (5) respectively, a mounting sleeve (18) is fixedly connected to a terminal end of each mounting rod (17), and each mounting sleeve (18) is rotatably sleeved at an outer side of one fixed shaft (5).
5. The preparation method of the membrane electrode for the high-temperature proton exchange membrane fuel cell is characterized by comprising the following steps:
s1, mixing and stirring a catalyst, ultrapure water, a solvent and resin to prepare a membrane electrode slurry, wherein the catalyst is a Pt-based noble metal carbon supported catalyst, the noble metal content of the catalyst is more than 40%, and the ratio of the solvent to the ultrapure water is (1-4): (6-9), wherein the solid content of the membrane electrode slurry is 5-20%;
s2, performing dispersion treatment on the membrane electrode slurry, controlling the temperature to be 5-15 ℃ to enable the particle size of the membrane electrode slurry D50 to be 0.5-1.5 microns, then coating the membrane electrode slurry on a gas diffusion layer in a slit coating mode to obtain a gas diffusion coating, and performing drying treatment to obtain a gas diffusion electrode with the noble metal content of 0.5-2 mg/cm < 2 >;
and S3, respectively placing the two gas diffusion electrodes on two sides of the high-temperature proton exchange membrane, and combining the two gas diffusion electrodes with the sealing piece in a hot pressing, bonding or sticking mode to obtain the high-temperature proton exchange membrane electrode.
6. The method for producing a membrane electrode for a high temperature proton exchange membrane fuel cell as claimed in claim 5, wherein the thickness of the gas diffusion coating is 0.05-0.75 mm, and the drying treatment temperature is 50-100 ℃ for 1-15min.
7. The method according to claim 5, wherein the solvent is at least one of methanol, ethanol, diethyl ether, n-propanol, and isopropanol, the resin is at least one of PTFE, PVDF, PBI, nafion, PVA, and the dispersion treatment is at least one of ultrasonic, high-speed shearing, high-pressure shearing, and high-pressure micro-jet.
8. The high-temperature proton exchange membrane fuel cell is characterized in that the preparation method of the membrane electrode for the high-temperature proton exchange membrane fuel cell is adopted, and a cathode and anode end plate and a cathode and anode electrode plate are respectively arranged on two sides of the high-temperature proton exchange membrane electrode and matched with a sealing piece together, and are assembled into the high-temperature proton exchange membrane fuel cell through mechanical pressing.
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| CN113594472A (en) * | 2021-09-16 | 2021-11-02 | 无锡威孚高科技集团股份有限公司 | Ink for membrane electrode of proton exchange membrane fuel cell and preparation method thereof |
| CN114204049A (en) * | 2021-12-03 | 2022-03-18 | 中国科学院大连化学物理研究所 | Preparation method of low platinum-loading proton exchange membrane fuel cell membrane electrode |
| CN217016457U (en) * | 2020-12-09 | 2022-07-22 | 苏州科润新材料股份有限公司 | A agitating unit for preparing proton exchange membrane feed liquid |
| CN217795841U (en) * | 2022-08-25 | 2022-11-15 | 威海君江导电材料有限公司 | Carbon nanotube conducting material dispersing device |
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| CN217016457U (en) * | 2020-12-09 | 2022-07-22 | 苏州科润新材料股份有限公司 | A agitating unit for preparing proton exchange membrane feed liquid |
| CN113594472A (en) * | 2021-09-16 | 2021-11-02 | 无锡威孚高科技集团股份有限公司 | Ink for membrane electrode of proton exchange membrane fuel cell and preparation method thereof |
| CN114204049A (en) * | 2021-12-03 | 2022-03-18 | 中国科学院大连化学物理研究所 | Preparation method of low platinum-loading proton exchange membrane fuel cell membrane electrode |
| CN217795841U (en) * | 2022-08-25 | 2022-11-15 | 威海君江导电材料有限公司 | Carbon nanotube conducting material dispersing device |
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| CN118336056A (en) * | 2024-05-10 | 2024-07-12 | 氢新科技(深圳)有限公司 | High-performance high-temperature proton exchange membrane fuel cell membrane electrode, preparation process and device |
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