CN117476985A - Method and equipment for preparing membrane electrode of high-temperature proton exchange membrane fuel cell - Google Patents

Method and equipment for preparing membrane electrode of high-temperature proton exchange membrane fuel cell Download PDF

Info

Publication number
CN117476985A
CN117476985A CN202311566160.8A CN202311566160A CN117476985A CN 117476985 A CN117476985 A CN 117476985A CN 202311566160 A CN202311566160 A CN 202311566160A CN 117476985 A CN117476985 A CN 117476985A
Authority
CN
China
Prior art keywords
membrane electrode
fixedly connected
proton exchange
fuel cell
exchange membrane
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311566160.8A
Other languages
Chinese (zh)
Inventor
李瑞宇
蔡云
刘一麟
谢子奇
朱玉砥
孟冉冉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hydrogen New Technology Shenzhen Co ltd
Original Assignee
Hydrogen New Technology Shenzhen Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hydrogen New Technology Shenzhen Co ltd filed Critical Hydrogen New Technology Shenzhen Co ltd
Priority to CN202311566160.8A priority Critical patent/CN117476985A/en
Publication of CN117476985A publication Critical patent/CN117476985A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/1004—Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B01F23/51—Methods thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B01F23/51—Methods thereof
    • B01F23/511—Methods thereof characterised by the composition of the liquids or solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B01F23/53—Mixing liquids with solids using driven stirrers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
    • B01F27/191—Stirrers with two or more mixing elements mounted in sequence on the same axis with similar elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
    • B01F27/701—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms comprising two or more shafts, e.g. in consecutive mixing chambers
    • B01F27/706—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms comprising two or more shafts, e.g. in consecutive mixing chambers with all the shafts in the same receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms 
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/83—Mixing plants specially adapted for mixing in combination with disintegrating operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/10—Maintenance of mixers
    • B01F35/12—Maintenance of mixers using mechanical means
    • B01F35/123—Maintenance of mixers using mechanical means using scrapers for cleaning mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/75—Discharge mechanisms
    • 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
    • H01M4/8825—Methods for deposition of the catalytic active composition
    • H01M4/8828—Coating with slurry or ink
    • 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
    • H01M4/90—Selection of catalytic material
    • H01M4/92—Metals of platinum group
    • H01M4/925—Metals of platinum group supported on carriers, e.g. powder carriers
    • H01M4/926—Metals of platinum group supported on carriers, e.g. powder carriers on carbon or graphite
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Electrochemistry (AREA)
  • Dispersion Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Inert Electrodes (AREA)

Abstract

The invention discloses a preparation method and equipment of a membrane electrode of a high-temperature proton exchange membrane fuel cell, 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 (4-8): (2-6), wherein the solid content of the membrane electrode slurry is 5-20%; s2, performing ultrasonic (or high-speed shearing, high-pressure microjet and the like) dispersion treatment on the membrane electrode slurry, and controlling the temperature to be about 10 ℃. 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

Method and equipment for preparing membrane electrode of high-temperature proton exchange membrane fuel cell
Technical Field
The invention relates to the technical field of high-temperature fuel cells, in particular to a preparation method and equipment of a membrane electrode of a high-temperature proton exchange membrane fuel cell.
Background
The fuel cell is an important application end of hydrogen energy and is paid attention to; 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, but 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 conventional GDE process has the disadvantages of high resistance and low power densityThe application of the high-temperature proton exchange membrane fuel cell is severely restricted under the condition; in order to ensure the catalytic activity of the membrane electrode, the catalyst dosage of the prior high-temperature proton exchange membrane fuel cell is very high (about 2-5mg/cm 2 ) The manufacturing cost of the battery is high; therefore, a new preparation process is urgently needed, and better battery performance can be achieved under the condition of lower catalyst consumption.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a preparation method and equipment of a membrane electrode of a high-temperature proton exchange membrane fuel cell, which use a catalyst with higher noble metal content, are beneficial to reducing the thickness of a coating under the condition of the same noble metal content, thereby improving the coating quality, helping to improve the performance of the cell, reducing the dosage of the catalyst, reducing the total number of catalytic active sites, reducing the thickness of the coating, and ensuring the good performance of the cell by matching with the adjustment of other later processes.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the preparation method of the membrane electrode of 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 (4-8): (2-6), wherein the solid content of the membrane electrode slurry is 5-20%;
s2, dispersing the membrane electrode slurry, controlling the temperature to be 4-16 ℃, coating the dispersed membrane electrode slurry on a gas diffusion layer in a slit coating mode to obtain a gas diffusion coating, and drying in at least one of low pressure, vacuum, freezing or microwave drying modes to obtain the catalyst with the noble metal content of 0.5-2mg/cm 2 Is provided;
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 solvent is at least one of high boiling point alcohols such as ethylene glycol, glycerol, n-butanol, n-pentanol and the like.
Preferably, the resin is at least one of PTFE, PVDF, PBI, nafion, PVA.
Preferably, the dispersion treatment is at least one of ultrasound, high-speed shear, high-pressure microfluidics.
Preferably, the gas diffusion coating has a coating thickness of less than 0.75 mm.
The invention also provides a preparation device of the membrane electrode of the high-temperature proton exchange membrane fuel cell, which comprises a mixing box and is characterized in that the top of the mixing box is penetrated and provided with a feed hopper fixedly connected with the feed hopper, the top of the mixing box is fixedly connected with a motor, the output end of the motor is fixedly connected with a transmission rod, the transmission rod penetrates and rotationally connected with the mixing box, the outer wall of the transmission rod is fixedly connected with a plurality of first stirring rods, the inner wall of the mixing box is movably connected with a plurality of second stirring rods, the outer wall of the transmission rod is fixedly connected with a spiral conveying blade, the bottom of the mixing box is penetrated and provided with a discharge hopper fixedly connected with the discharge hopper, the outer wall of the discharge hopper is fixedly connected with an electromagnetic valve, the bottom of the mixing box is fixedly connected with four supporting legs which are in rectangular distribution, and a crushing mechanism is arranged in the feed hopper.
Preferably, a plurality of the first stirring rods and the second stirring rods are arranged in a staggered manner.
Preferably, the crushing mechanism comprises a driving bevel gear and a driven bevel gear, wherein the driving bevel gear is fixed at the upper end of a transmission rod and is connected with a first driven bevel gear in a meshed mode, the driven bevel gears are distributed at the lower end of the transmission rod at equal intervals, the first driven bevel gear is fixedly connected with a rotating shaft, the top of the mixing box is fixedly connected with a limiting block, the rotating shaft penetrates through the limiting block and is rotationally connected with the limiting block, two first bevel gears are fixedly connected with the outer wall of the rotating shaft, each first bevel gear is meshed with a second bevel gear, the rear ends of the two second bevel gears are fixedly connected with rotating shafts, and each rotating shaft penetrates through a feed hopper and is rotationally connected with the feed hopper.
Preferably, the outer wall of transfer line still is connected with the connecting rod, the bottom fixedly connected with of connecting rod scrapes the pole, it is L column structure to scrape the pole, scrape the one end laminating of pole on the mixing box inner bottom wall, the other end extends to the inside closely laminating with the ejection of compact fill inner wall of ejection of compact fill.
Preferably, one end fixedly connected with brush board, the driven bevel gear of the other end fixed connection second of second stirring rod, brush board and mixing box closely laminate, driven bevel gear meshes with the driven bevel gear of second, still be equipped with the turning vane on the second stirring rod outer wall, be equipped with a plurality of through-holes on the turning vane.
Preferably, the rotation directions of the two pulverizing rollers are opposite.
Compared with the prior art, the invention has the beneficial effects that:
1. the dispersibility of the slurry is better through the adjustment of the types of the solvents and the proportion of the alcohol to the water; for example, the coating process is adjusted, and the uniformity of the coating is regulated; these adjustments all contribute to improvements in the dimensional uniformity and specific surface area of the catalytic layer, contributing to improved cell performance.
2. After being coated by adopting a slit coating mode, the coating is dried by adopting at least one mode of low pressure, vacuum, freezing or microwave drying and the like, so that the coating is quickly and uniformly dried.
3. Through the cooperation of first stirring rod, the transfer line, passive bevel gear, second stirring rod and turning vane, can make first stirring rod carry out horizontal rotation in the barrel, the turning vane through on the second stirring rod vertically rotates in the barrel, can make multiple material stirring more abundant, even through horizontal and vertical dual cooperation, stirring effect is better, be equipped with the through-hole on the turning vane simultaneously, can cause the vortex when rotatory through the through-hole, form very strong torrent to stirring material department through the vortex, further improve stirring effect.
4. Through the setting of transfer line, screw conveying blade and scraping the pole, can assist the discharge of material through rotating the rotation, the one end of scraping the pole simultaneously extends to ejection of compact fill inner wall, can realize scraping the clearance of hopper inner wall and still can stir in the play hopper when rotatory ejection of compact, can also accelerate ejection of compact speed when avoiding the jam.
Drawings
FIG. 1 is a cross-sectional view of a fabrication apparatus for a membrane electrode of a high temperature proton exchange membrane fuel cell according to the present invention;
FIG. 2 is a front view of a manufacturing apparatus for a membrane electrode of a high temperature proton exchange membrane fuel cell according to the present invention;
FIG. 3 is an enlarged view of the construction of FIG. 1A of a device for preparing membrane electrodes of a high temperature proton exchange membrane fuel cell according to the present invention;
fig. 4 is a partial structure diagram of a doctor blade of the apparatus for preparing a membrane electrode of a high temperature proton exchange membrane fuel cell according to the present invention.
In the figure: 1 mixing box, 2 feed hoppers, 3 motors, 4 transmission rods, 5 first stirring rods, 6 second stirring rods, 7 spiral conveying blades, 8 discharge hoppers, 9 electromagnetic valves, 10 supporting legs, 11 driving bevel gears, 12 driven bevel gears, 13 rotating shafts, 14 limiting blocks, 15 first bevel gears, 16 second bevel gears, 17 rotating shafts, 18 crushing rollers, 19 connecting rods, 20 scraping rods, 21 driven bevel gears, 22 brushing plates, 23 second driven bevel gears and 24 rotating blades.
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.
The preparation method of the membrane electrode of 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 (4-8): (2-6), wherein the solid content of the membrane electrode slurry is 5-20%;
s2, performing ultrasonic (or high-speed shearing, high-pressure microjet and the like) dispersion treatment on the membrane electrode slurry, controlling the temperature at 4-16 ℃ to ensure that the particle size of the membrane electrode slurry D50 is 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 then performing drying treatment in at least one of low-pressure, vacuum, freezing or microwave drying modes to obtain the catalyst with the noble metal content of 0.5-2mg/cm 2 Is provided;
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.
The solvent is at least one of high boiling point alcohols such as glycol, glycerol, n-butanol, n-amyl alcohol and the like, the resin is at least one of PTFE, PVDF, PBI, nafion, PVA, and the coating thickness of the gas diffusion coating is less than 0.75 mm.
Referring to fig. 1-2, the invention also provides a preparation device of a membrane electrode of a high temperature proton exchange membrane fuel cell, comprising a mixing box 1, wherein the top of the mixing box 1 is penetrated with a feed hopper 2 fixedly connected with the feed hopper, the top of the mixing box 1 is fixedly connected with a motor 3, the output end of the motor 3 is fixedly connected with a transmission rod 4, the transmission rod 4 penetrates through the mixing box 1 and is rotationally connected with the mixing box, the outer wall of the transmission rod 4 is fixedly connected with a plurality of first stirring rods 5, the inner wall of the mixing box 1 is movably connected with a plurality of second stirring rods 6, the plurality of first stirring rods 5 and the second stirring rods 6 are arranged in a staggered manner, the outer wall of the transmission rod 4 is fixedly connected with a spiral conveying blade 7, the bottom of the mixing box 1 is penetrated with a discharge hopper 8 fixedly connected with the discharge hopper 8, the outer wall of the discharge hopper 8 is fixedly connected with an electromagnetic valve 9, the bottom of the mixing box 1 is fixedly connected with four supporting legs 10 which are distributed in a rectangular shape, the inside of the feed hopper 2 is provided with a crushing mechanism, the crushing mechanism comprises a drive bevel gear 11 and a driven bevel gear 21, the drive bevel gear 11 is fixed at the upper end of the transmission rod 4 and is in meshed connection with a first driven bevel gear 12, the driven bevel gears 21 are equidistantly distributed at the lower end of the transmission rod 4, the first driven bevel gear 12 is fixedly connected with a rotating shaft 13, the top of the mixing box 1 is fixedly connected with a limiting block 14, the rotating shaft 13 penetrates through the limiting block 14 and is in rotary connection with the limiting block 14, the outer wall of the rotating shaft 13 is fixedly connected with two first bevel gears 15, each first bevel gear 15 is meshed with a second bevel gear 16, the rear ends of the two second bevel gears 16 are fixedly connected with rotating shafts 17, the two rotating shafts 17 penetrate through the feed hopper 2 and are in rotary connection with the same, the outer wall of each rotating shaft 17 is fixedly connected with a crushing roller 18, the rotating directions of the two crushing rollers 18 are oppositely arranged, the outer wall of transfer line 4 still is connected with connecting rod 19, the bottom fixedly connected with of connecting rod 19 scrapes pole 20, scrape pole 20 and be L column structure, scrape the one end laminating of pole 20 on mixing box 1 inner bottom wall, the other end extends to the ejection of compact fill 8 inside and ejection of compact fill 8 inner wall closely laminating, the one end fixedly connected with brush plate 22 of second stirring rod 6, the other end fixedly connected with second driven bevel gear 23, brush plate 22 closely laminates with mixing box 1, driven bevel gear 21 meshes with second driven bevel gear 23, still be equipped with on the second stirring rod 6 outer wall and change leaf 24, be equipped with a plurality of through-holes on the leaf 24.
Embodiment one:
high solvent to ultrapure water ratio, high boiling point alcohol, microwave drying:
(1) 46% Pt/C catalyst, ultra pure water, ethylene glycol and PTFE resin were mixed in a ratio of 4:58:37:1, 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 membrane electrode slurry after the dispersion treatment on a gas diffusion layer by using a slit coater, and controlling the thickness of the coating to be 0.2-0.3 mm to obtain a coated sample;
(4) Subjecting the coated sample to N 2 Microwave drying under protection to obtain noble metal with a content of about 1mg/cm 2 Is provided.
Embodiment two:
high solvent to ultrapure water ratio, ordinary alcohol, microwave drying:
(1) 46% Pt/C catalyst, ultra pure water, isopropyl alcohol and PTFE resin were mixed in a ratio of 4:58:37:1, 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 membrane electrode slurry after the dispersion treatment on a gas diffusion layer by using a slit coater, and controlling the thickness of the coating to be 0.2-0.3 mm to obtain a coated sample;
(4) Subjecting the coated sample to N 2 Microwave drying under protection to obtain noble metal with a content of about 1mg/cm 2 Is provided.
Embodiment III:
high solvent to ultrapure water ratio, high boiling point alcohol, general drying:
(1) 46% Pt/C catalyst, ultra pure water, ethylene glycol and PTFE resin were mixed in a ratio of 4:58:37:1, 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 membrane electrode slurry after the dispersion treatment on a gas diffusion layer by using a slit coater, and controlling the thickness of the coating to be 0.2-0.3 mm to obtain a coated sample;
(4) Drying the above coating sample at 50-80deg.C to obtain a coating with noble metal content of about 1mg/cm 2 Is provided.
Embodiment four:
taking two pieces of the gas diffusion electrode prepared in the embodiment 1, wherein each piece is 5cm 2 The gas diffusion electrodes are respectively arranged on two sides of a high-temperature proton exchange membrane and are combined with a sealing piece through hot pressing to form a membrane electrode, then the membrane electrode, a polar plate, an end plate, the sealing piece and other accessories are assembled together to form the high-temperature proton exchange membrane fuel cell, the high-temperature proton exchange membrane fuel cell is marked as a cell 1, and the performance of the high-temperature proton exchange membrane fuel cell is tested.
The gas diffusion electrodes prepared in examples two to three were assembled into high temperature proton exchange membrane fuel cells, designated as cells 2 and 3, respectively, by the same method, and their performances were tested.
The test results were as follows:
it is evident that the cell 1 made from example 1 shows a significantly higher power density than the other cells.
According to the invention, a catalyst, ultrapure water, a solvent and resin are injected into a mixing box 1 through a feed hopper 2, a motor 3 is started, in the process of injecting raw materials, a solid catalyst raw material is injected into the mixing box 1 through the feed hopper 2, a transmission rod 4, a driving bevel gear 11, a driven bevel gear 12, a rotating shaft 13, two first bevel gears 15, a second bevel gear 16, a rotating shaft 17 and a crushing roller 18 are driven to rotate through the output end of the motor 3, and the two crushing rollers 18 are relatively rotated, so that the solid catalyst raw material can be crushed into small-volume particles, and the subsequent catalytic reaction is good;
the output end of the motor 3 drives the transmission rod 4 and the first stirring rod 5 to transversely rotate in the barrel, the first stirring rod 5 rotates to drive various materials to stir and mix, meanwhile, the transmission rod 4 drives the plurality of driven bevel gears 21 to rotate, so that the rotary blades 24 on the second stirring rod 6 are driven to vertically rotate in the barrel, the various materials can be stirred more fully and uniformly through transverse and vertical double matching, the stirring effect is better, through holes are formed in the rotary blades 24, turbulent flow can be caused during rotation, strong turbulence is formed to the stirring materials through the turbulent flow, the stirring effect is further improved, and meanwhile, the scraping rods 20 at the brush plate 24 and the bottom are driven to rotationally scrape the inner wall and the bottom wall of the barrel during stirring, so that the phenomenon that the materials are difficult to clean due to adhesion on the inner wall is avoided;
after the stirring and mixing are completed, the electromagnetic valve 9 on the discharge hopper 8 is opened, at this time, the mixed materials can be discharged through the discharge hopper 8, the spiral conveying blade 7 is driven to rotate through the rotation of the transmission rod 4, the materials can be discharged in an auxiliary mode, one end of the scraping rod 20 extends to the inner wall of the discharge hopper 8, scraping and cleaning of the inner wall of the discharge hopper 8 can be achieved, stirring can be carried out in the discharge hopper 8 during the rotation discharging, and the discharging speed can be accelerated while blocking is avoided.
The present invention is not limited to the above-mentioned embodiments, and any person skilled in the art, based on the technical solution of the present invention and the inventive concept thereof, can be replaced or changed within the scope of the present invention.

Claims (10)

1. The preparation method of the membrane electrode of 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 (4-8): (2-6), wherein the solid content of the membrane electrode slurry is 5-20%;
s2, carrying out dispersion treatment on the membrane electrode slurry, controlling the temperature to be 4-16 ℃, then coating the dispersed membrane electrode slurry on a gas diffusion layer in a slit coating mode to obtain a gas diffusion coating, and then carrying out drying treatment in at least one of a low-pressure, vacuum, freezing or microwave drying mode to obtain the catalyst with the noble metal content of 0.5-2mg/cm 2 Is provided;
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.
2. The method for preparing a membrane electrode of a high-temperature proton exchange membrane fuel cell according to claim 1, wherein the solvent is at least one of high-boiling alcohols such as ethylene glycol, glycerol, n-butanol, n-pentanol, and the like.
3. The method for producing a membrane electrode for a high-temperature proton exchange membrane fuel cell as claimed in claim 1, wherein the resin is at least one of PTFE, PVDF, PBI, nafion, PVA.
4. The method for preparing a membrane electrode of a high temperature proton exchange membrane fuel cell according to claim 1, wherein the dispersion treatment is at least one of ultrasonic, high-speed shearing, high-pressure shearing, and high-pressure micro-jet.
5. The utility model provides a preparation equipment of high temperature proton exchange membrane fuel cell membrane electrode, includes mixing box (1), its characterized in that, the top of mixing box (1) is run through and is equipped with feeder hopper (2) rather than fixed connection, the top fixedly connected with motor (3) of mixing box (1), the output fixedly connected with transfer line (4) of motor (3), transfer line (4) run through mixing box (1) and rather than swivelling joint, the outer wall fixedly connected with of transfer line (4) a plurality of first stirring rod (5), the inner wall swing joint of mixing box (1) has a plurality of second stirring rod (6), the outer wall fixedly connected with screw conveyer blade (7) of transfer line (4), the bottom of mixing box (1) is run through and is equipped with ejection of compact fill (8) rather than fixed connection, the outer wall fixedly connected with electromagnetic valve (9) of ejection of compact fill (8), the bottom fixedly connected with four positions of mixing box (1) are rectangular distribution's supporting leg (10), be equipped with crushing mechanism in feeder hopper (2).
6. The apparatus for preparing a membrane electrode for a high temperature proton exchange membrane fuel cell as claimed in claim 5, wherein the plurality of first stirring rods (5) and the plurality of second stirring rods (6) are arranged in a staggered manner.
7. The preparation device of the membrane electrode of the high-temperature proton exchange membrane fuel cell according to claim 5, wherein the crushing mechanism comprises a driving bevel gear (11) and a driven bevel gear (21), the driving bevel gear (11) is fixed at the upper end of a transmission rod (4) and is connected with a first driven bevel gear (12) in a meshed mode, the driven bevel gears (21) are equidistantly distributed at the lower end of the transmission rod (4), the first driven bevel gear (12) is fixedly connected with a rotating shaft (13), the top of the mixing box (1) is fixedly connected with a limiting block (14), the rotating shaft (13) penetrates through the limiting block (14) and is in rotary connection with the limiting block, two first bevel gears (15) are fixedly connected with the outer wall of the rotating shaft (13), each first bevel gear (15) is meshed with a second bevel gear (16), the rear ends of the two second bevel gears (16) are fixedly connected with rotating shafts (17), and the two rotating shafts (17) penetrate through the feed hopper (2) and are in rotary connection with the rotating shaft, and the outer wall of each rotating shaft (17) is fixedly connected with a crushing roller (18).
8. The apparatus for preparing a membrane electrode for a high temperature proton exchange membrane fuel cell as claimed in claim 7, wherein the two pulverizing rolls (18) are disposed in opposite directions of rotation.
9. The preparation device of the membrane electrode of the high-temperature proton exchange membrane fuel cell according to claim 5, wherein the outer wall of the transmission rod (4) is further connected with a connecting rod (19), the bottom of the connecting rod (19) is fixedly connected with a scraping rod (20), the scraping rod (20) is of an L-shaped structure, one end of the scraping rod (20) is attached to the inner bottom wall of the mixing box (1), and the other end of the scraping rod extends to the inside of the discharging hopper (8) to be tightly attached to the inner wall of the discharging hopper (8).
10. The preparation device of the membrane electrode of the high-temperature proton exchange membrane fuel cell according to claim 7, wherein one end of the second stirring rod (6) is fixedly connected with a brush plate (22), the other end of the second stirring rod is fixedly connected with a second driven bevel gear (23), the brush plate (22) is tightly attached to the mixing box (1), the driven bevel gear (21) is meshed with the second driven bevel gear (23), a rotary blade (24) is further arranged on the outer wall of the second stirring rod (6), and a plurality of through holes are formed in the rotary blade (24).
CN202311566160.8A 2023-11-22 2023-11-22 Method and equipment for preparing membrane electrode of high-temperature proton exchange membrane fuel cell Pending CN117476985A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311566160.8A CN117476985A (en) 2023-11-22 2023-11-22 Method and equipment for preparing membrane electrode of high-temperature proton exchange membrane fuel cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311566160.8A CN117476985A (en) 2023-11-22 2023-11-22 Method and equipment for preparing membrane electrode of high-temperature proton exchange membrane fuel cell

Publications (1)

Publication Number Publication Date
CN117476985A true CN117476985A (en) 2024-01-30

Family

ID=89634727

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311566160.8A Pending CN117476985A (en) 2023-11-22 2023-11-22 Method and equipment for preparing membrane electrode of high-temperature proton exchange membrane fuel cell

Country Status (1)

Country Link
CN (1) CN117476985A (en)

Similar Documents

Publication Publication Date Title
CN106207129B (en) A kind of preparation method of anode slurry of high-rate
CN101393978B (en) Pulp for lithium ionic cell electrode and manufacturing method thereof
CN104577071A (en) Dry-powder pulping method of lithium-ion battery
CN111111531A (en) Efficient dispersion equipment and process for premixing and kneading lithium battery slurry
CN103840174B (en) A kind of direct alcohol fuel cell diaphragm electrode and preparation thereof and application
CN112121660B (en) Method for preparing anode slurry of lithium ion battery
CN111640907B (en) Lithium ion battery anode slurry, preparation method thereof and stirring cylinder used in preparation process
CN117174972B (en) Membrane electrode for high-temperature proton exchange membrane fuel cell and preparation method and equipment thereof
CN101355166A (en) Method for preparing membrane electrode of fuel batter with proton exchange film
CN117476985A (en) Method and equipment for preparing membrane electrode of high-temperature proton exchange membrane fuel cell
CN107732195A (en) A kind of graphite modified method and graphite/silicon composite
CN113257584A (en) Preparation method of hard carbon slurry for lithium ion capacitor
CN110600674A (en) Slurry mixing process of lithium ion battery slurry
CN114792831A (en) High-performance long-life anti-reverse electrode membrane electrode and preparation method thereof
CN212576364U (en) A vortex breaker cavity device for lithium cell production
CN112838186B (en) Baking equipment for lithium manganate battery anode material
CN118315544B (en) Dry powder lithium battery pole piece forming method
JP2012142151A (en) Production apparatus of catalyst paste and production method of catalyst paste
CN113270570A (en) Preparation method of lithium ion battery anode slurry
CN111599987A (en) Preparation method of lithium battery positive electrode slurry
CN218741689U (en) Grinding and mixing device for preparing lithium battery conductive graphite
CN103956459B (en) A kind of eco-friendly method for manufacturing lithium battery negative electrode plate
CN209322867U (en) A kind of mixing arrangement for biological feedstuff production
CN221736646U (en) Aggregate preprocessing device
CN214809960U (en) Even lithium battery slurry preparation facilities disperses

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication