CN107394239B - Fuel cell membrane electrode preparation method and preparation equipment - Google Patents
Fuel cell membrane electrode preparation method and preparation equipment Download PDFInfo
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- CN107394239B CN107394239B CN201710632970.7A CN201710632970A CN107394239B CN 107394239 B CN107394239 B CN 107394239B CN 201710632970 A CN201710632970 A CN 201710632970A CN 107394239 B CN107394239 B CN 107394239B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1004—Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
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- 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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract
The invention discloses a preparation method and preparation equipment of a fuel cell membrane electrode, wherein the preparation equipment comprises a pre-stirrer, a first pump system, continuous dispersion stirring equipment, a heat exchanger, a second pump system, a buffer tank and a storage tank; the preparation method specifically comprises the following steps: a pre-stirring step; continuously dispersing and stirring; cooling and caching the tank; vacuum defoamation; and a membrane electrode manufacturing step, namely manufacturing the membrane electrode by using the slurry subjected to vacuum defoamation through a coating machine with a set rotating speed. The preparation method and the preparation equipment of the fuel cell membrane electrode solve the problem of uneven distribution of the traditional nano-scale particles and ensure the uniformity of particle dispersion. The preparation method plays a decisive role in preparing the consistent membrane electrode of the next coating machine, and the membrane electrode of the fuel cell with good dispersion consistency and thickness of 8-12 microns can be prepared by the preparation method of the membrane electrode, so that the membrane electrode of the fuel cell is convenient to use and popularize in the fuel cell industry.
Description
Technical Field
The invention belongs to the technical field of fuel cells, relates to a membrane electrode preparation method, and in particular relates to a fuel cell membrane electrode preparation method; meanwhile, the invention also relates to a fuel cell membrane electrode preparation device.
Background
With the continuous increase of national economy in China and the continuous improvement of the living standard of people, automobiles become necessary tools for people to travel, with the increase of haze in a plurality of cities in China, people are aware that new energy development is not sustained, the new energy automobiles are considered as important links of energy transformation, and proton exchange membrane fuel cell automobiles are considered as the most mature representation of the current electricity generation of the new energy automobiles. The device generates electric energy by chemical reaction of hydrogen and oxygen in air, thereby pushing the automobile to advance, and has a series of advantages of simple structure, no pollution to the atmosphere, energy saving, high efficiency and the like.
In order to ensure that the fuel cell engine can continuously and efficiently run, certain hydrogen and air are required, a hydrogen subsystem is required for hydrogen supply, an air compressor system and a cooling waterway system are required for air supply, the air is pressurized by virtue of the air compressor to ensure that the supply quantity of the air meets the requirement of a high-power engine, and the chemical reaction of the hydrogen and oxygen in the air on a membrane electrode of an MEA (membrane electrode assembly) according to a certain proportion is realized, so that the requirement of the generated energy of the fuel cell engine under the condition of no use is met.
The membrane electrode of the MEA plays the most critical role in the fuel cell system, and the current fuel cell membrane electrode has uneven dispersion of hydrogen and oxygen on the membrane electrode, and finally uneven voltage distribution of the fuel cell monomer is caused.
In view of this, there is an urgent need to design a new membrane electrode assembly for fuel cells in order to overcome the above-mentioned drawbacks of the existing membrane electrode assembly.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the preparation method of the fuel cell membrane electrode can solve the problems of uneven dispersion of the existing membrane electrode and uneven voltage distribution of a fuel cell unit, and improve the uniformity of the voltage distribution of the fuel cell.
In order to solve the technical problems, the invention adopts the following technical scheme:
a method for preparing a membrane electrode of a fuel cell, wherein the preparation method is completed by membrane electrode preparation equipment;
the membrane electrode preparation apparatus includes: a pre-mixer, a first pump system, a continuous dispersion stirring device, a heat exchanger, a second pump system, a buffer tank and a storage tank; the method comprises the steps of pre-stirring raw liquid, namely, a solvent, a glue solution and active substances, primarily stirring in a pre-stirring machine, entering a dispersing and stirring machine device adopting a film convolution method through a first pump system for continuous dispersing and stirring, forming centrifugal turbulence in a barrel to enable the raw liquid to be fully stirred, storing the raw liquid in a buffer tank through a heat exchanger, pumping the uniformly dispersed liquid into a storage tank through a second pump system again for vacuum defoaming treatment, and then manufacturing a membrane electrode;
the preparation method specifically comprises the following steps:
pre-stirring: respectively placing the solvent, the glue solution and the active substances into a feed inlet of a pre-stirring machine, mixing the solvent, the glue solution and the active substances into slurry through rotary stirring under the drive of a motor, and cooling heat generated in the stirring process through a cooling water jacket;
continuously dispersing and stirring: the speed of a rotor of the pre-stirred mixture is regulated in dispersing stirrer equipment through a first pump system, so that the membrane resistance reaches a minimum value, the optimal dispersing condition is determined, and the adopted film convolution method can disperse particles at the nanometer level;
and (3) cooling the cache tank: the slurry with nano-scale is subjected to continuous dispersion stirring and needs to be subjected to cooling treatment in a heat exchanger, and the cooled slurry flows into a buffer tank;
vacuum defoamation: the slurry in the buffer tank enters a storage tank through a second pump system to carry out vacuum defoaming treatment under certain temperature and pressure;
and a membrane electrode manufacturing step: the slurry after vacuum defoamation is made into a membrane electrode by a coating machine with set rotating speed.
A method for preparing a fuel cell membrane electrode, the method comprising:
pre-stirring: respectively placing the solvent, the glue solution and the active substances into a feed inlet of a pre-stirring machine, mixing the solvent, the glue solution and the active substances into slurry through rotary stirring under the drive of a motor, and cooling heat generated in the stirring process through a cooling water jacket;
continuously dispersing and stirring: the speed of a rotor of the pre-stirred mixture is regulated in dispersing stirrer equipment through a first pump system, so that the membrane resistance reaches a minimum value, the optimal dispersing condition is determined, and the adopted film convolution method can disperse particles at the nanometer level;
and (3) cooling the cache tank: the slurry with nano-scale is subjected to continuous dispersion stirring and needs to be subjected to cooling treatment in a heat exchanger, and the cooled slurry flows into a buffer tank;
vacuum defoamation: the slurry in the buffer tank enters a storage tank through a second pump system to carry out vacuum defoaming treatment under certain temperature and pressure;
and a membrane electrode manufacturing step: the slurry after vacuum defoamation is made into a membrane electrode by a coating machine with set rotating speed.
A fuel cell membrane electrode preparation apparatus, the membrane electrode preparation apparatus comprising: a pre-mixer, a first pump system, a continuous dispersion stirring device, a heat exchanger, a second pump system, a buffer tank and a storage tank; the material inlet is connected with the pre-stirring machine; the pre-stirring machine, the first pump system, the continuous dispersion stirring equipment, the heat exchanger, the buffer tank, the second pump system and the storage tank are connected in sequence;
the pre-stirring stock solution contains solvent, glue solution and active substances, the pre-stirring is carried out in a pre-stirrer, the pre-stirring stock solution enters a dispersing stirrer device adopting a film convolution method through a first pump system for continuous dispersion stirring, centrifugal turbulence is formed in a barrel, the stock solution is fully stirred, the stock solution is stored in a buffer tank through a heat exchanger, the second pump system is carried out again, the uniformly dispersed liquid is pumped into a storage tank for vacuum defoaming treatment, and then membrane electrode manufacturing is carried out.
As a preferred scheme of the invention, the preparation method of the membrane electrode preparation device specifically comprises the following steps:
pre-stirring: respectively placing the solvent, the glue solution and the active substances into a feed inlet of a pre-stirring machine, mixing the solvent, the glue solution and the active substances into slurry through rotary stirring under the drive of a motor, and cooling heat generated in the stirring process through a cooling water jacket;
continuously dispersing and stirring: the speed of a rotor of the pre-stirred mixture is regulated in dispersing stirrer equipment through a first pump system, so that the membrane resistance reaches a minimum value, the optimal dispersing condition is determined, and the adopted film convolution method can disperse particles at the nanometer level;
and (3) cooling the cache tank: the slurry with nano-scale is subjected to continuous dispersion stirring and needs to be subjected to cooling treatment in a heat exchanger, and the cooled slurry flows into a buffer tank;
vacuum defoamation: the slurry in the buffer tank enters a storage tank through a second pump system to carry out vacuum defoaming treatment under certain temperature and pressure;
and a membrane electrode manufacturing step: the slurry after vacuum defoamation is made into a membrane electrode by a coating machine with set rotating speed.
The invention has the beneficial effects that: the preparation method and the preparation equipment of the fuel cell membrane electrode solve the problem of uneven distribution of the traditional nano-scale particles and ensure the uniformity of particle dispersion. The preparation method plays a decisive role in preparing the consistent membrane electrode of the next coating machine, and the membrane electrode with good dispersion consistency and thickness of 8-12 microns can be prepared by the preparation method of the membrane electrode, so that the membrane electrode is convenient to use and popularize in the fuel cell industry. The preparation method solves the problems of uneven membrane electrode thickness, uneven particle dispersion and uneven conductivity and water passing property of the prior fuel cell MEA, and has simple and efficient use.
According to the fuel cell membrane electrode and the preparation method thereof, turbulence in a dispersing stirrer device for continuously dispersing and stirring through a film convolution method can achieve nanoscale dispersion, and the problems of uneven dispersion of the existing membrane electrode and uneven voltage distribution of a fuel cell monomer are solved.
Drawings
FIG. 1 is a flow chart of a method for preparing a fuel cell membrane electrode according to the present invention.
FIG. 2 is a diagram of a fuel cell membrane electrode assembly apparatus according to the present invention.
Fig. 3 is a photograph of a membrane electrode obtained by a membrane electrode preparation method using a general dispersing apparatus.
FIG. 4 is a photograph of a membrane electrode obtained by the method for preparing a membrane electrode for a fuel cell according to the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1
The invention discloses a preparation method of a fuel cell membrane electrode and also discloses novel preparation equipment of the membrane electrode. Referring to fig. 2, the preparation apparatus includes a pre-mixer 1, a first pump system 2, a continuous dispersion mixer 3, a heat exchanger 4, a buffer tank 5, a second pump system 6 and a storage tank 7, wherein the continuous dispersion mixer 3 has a slurry flow direction and tangential double-layer function of the apparatus, turbulence inside the apparatus can disperse the slurry to a nano level, and meanwhile, the dispersion mixer (CELMIX) 3 can determine an optimal minimum resistance value by adjusting the rotation speed, so as to realize excellent viscosity of the slurry.
The material inlet 8 is connected with the pre-stirring machine 1; pre-mixer 1 and first the pump system 2 is connected; the first pump system 2 is connected with a dispersing stirrer device 3 for continuous dispersing stirring; the dispersing mixer device 3 for continuous dispersing and stirring is connected with the heat exchanger 4; the heat exchanger 4 is connected with a cache tank 5 (a pre-storing tank); the buffer tank 5 is connected with a second pump system 6; the second pump system 6 is connected to a reservoir 7.
Referring to fig. 1, the specific manufacturing steps for preparing the membrane electrode are as follows:
step S1, pre-stirring: respectively placing the solvent, the glue solution and the active substances into a feed inlet of a pre-stirring machine, mixing the solvent, the glue solution and the active substances into slurry through rotary stirring under the drive of a motor, and cooling heat generated in the stirring process through a cooling water jacket;
step S2, continuously dispersing and stirring: the speed of a rotor of the pre-stirred mixture is regulated in dispersing stirrer equipment through a first pump system, so that the membrane resistance reaches a minimum value, the optimal dispersing condition is determined, and the adopted film convolution method can disperse particles at the nanometer level;
step S3, cooling the cache tank: the slurry with nano-scale is subjected to continuous dispersion stirring and needs to be subjected to cooling treatment in a heat exchanger, and the cooled slurry flows into a buffer tank;
[ step S4 ] vacuum defoamation: the slurry in the buffer tank enters a storage tank through a second pump system to carry out vacuum defoaming treatment under certain temperature and pressure;
step S5, membrane electrode manufacturing step: making a membrane electrode by the slurry after vacuum defoamation through a coating machine with a set rotating speed; then carrying out certain vacuum plasma post-treatment and the like to finish the preparation.
Example two
The fuel cell membrane electrode obtained by the membrane electrode preparation method of a general dispersion apparatus is clearly different from the fuel cell membrane electrode preparation method of fig. 3 and 4, and fig. 2 is a new type of fuel cell membrane electrode preparation method.
According to comparison, the dispersing mixer equipment for continuous dispersing and stirring has the functions of slurry flow direction and tangential double layers of equipment, the slurry can be dispersed to the nanometer level through turbulent flow in the equipment, particles shot by an electron microscope are dispersed more uniformly and more easily to be consistent with a membrane electrode, meanwhile, the dispersing mixer equipment can determine the optimal minimum value of resistance through adjusting the rotating speed, the excellent viscosity of the slurry is realized, and the better toughness of the membrane electrode is ensured.
In summary, the preparation method of the fuel cell membrane electrode solves the problem of uneven distribution of the traditional nano-scale particles, and ensures the uniformity of particle dispersion. The preparation method plays a decisive role in preparing the consistent membrane electrode of the next coating machine, and the membrane electrode with good dispersion consistency and thickness of 8-12 microns can be prepared by the preparation method of the membrane electrode, so that the membrane electrode is convenient to use and popularize in the fuel cell industry. The preparation method solves the problems of uneven membrane electrode thickness, uneven particle dispersion and uneven conductivity and water passing property of the prior fuel cell MEA, and has simple and efficient use.
The description and applications of the present invention herein are illustrative and are not intended to limit the scope of the invention to the embodiments described above. Variations and modifications of the embodiments disclosed herein are possible, and alternatives and equivalents of the various components of the embodiments are known to those of ordinary skill in the art. It will be clear to those skilled in the art that the present invention may be embodied in other forms, structures, arrangements, proportions, and with other assemblies, materials, and components, without departing from the spirit or essential characteristics thereof. Other variations and modifications of the embodiments disclosed herein may be made without departing from the scope and spirit of the invention.
Claims (4)
1. A method for preparing a membrane electrode of a fuel cell, which is characterized in that the preparation method is completed by membrane electrode preparation equipment;
the membrane electrode preparation apparatus includes: a pre-mixer, a first pump system, a continuous dispersion stirring device, a heat exchanger, a second pump system, a buffer tank and a storage tank; the pre-stirring stock solution contains solvent, glue solution and active substances, the pre-stirring is carried out in a pre-stirrer, the pre-stirring stock solution enters equipment of a dispersing stirrer adopting a film convolution method through a first pump system, centrifugal turbulence is formed in a barrel, the stock solution is fully stirred, the stock solution is stored in a buffer tank through a heat exchanger, the uniformly dispersed liquid is pumped into a storage tank through a second pump system again for vacuum defoaming treatment, and then membrane electrode manufacturing is carried out;
the preparation method specifically comprises the following steps:
pre-stirring: respectively placing the solvent, the glue solution and the active substances into a feed inlet of a pre-stirring machine, mixing the solvent, the glue solution and the active substances into slurry through rotary stirring under the drive of a motor, and cooling heat generated in the stirring process through a cooling water jacket;
continuously dispersing and stirring: the speed of a rotor of the pre-stirred mixture is regulated in dispersing stirrer equipment through a first pump system, so that the membrane resistance reaches a minimum value, the optimal dispersing condition is determined, and the adopted film convolution method can disperse particles at the nanometer level;
and (3) cooling the cache tank: the slurry with nano-scale is subjected to continuous dispersion stirring and needs to be subjected to cooling treatment in a heat exchanger, and the cooled slurry flows into a buffer tank;
vacuum defoamation: the slurry in the buffer tank enters a storage tank through a second pump system to carry out vacuum defoaming treatment under certain temperature and pressure;
and a membrane electrode manufacturing step: the slurry after vacuum defoamation is made into a membrane electrode by a coating machine with set rotating speed.
2. The preparation method of the fuel cell membrane electrode is characterized by comprising the following steps of:
pre-stirring: respectively placing the solvent, the glue solution and the active substances into a feed inlet of a pre-stirring machine, mixing the solvent, the glue solution and the active substances into slurry through rotary stirring under the drive of a motor, and cooling heat generated in the stirring process through a cooling water jacket;
continuously dispersing and stirring: the speed of a rotor of the pre-stirred mixture is regulated in dispersing stirrer equipment through a first pump system, so that the membrane resistance reaches a minimum value, the optimal dispersing condition is determined, and the adopted film convolution method can disperse particles at the nanometer level;
and (3) cooling the cache tank: the slurry with nano-scale is subjected to continuous dispersion stirring and needs to be subjected to cooling treatment in a heat exchanger, and the cooled slurry flows into a buffer tank;
vacuum defoamation: the slurry in the buffer tank enters a storage tank through a second pump system to carry out vacuum defoaming treatment under certain temperature and pressure;
and a membrane electrode manufacturing step: the slurry after vacuum defoamation is made into a membrane electrode by a coating machine with set rotating speed.
3. A fuel cell membrane electrode preparation apparatus, characterized by comprising: a pre-mixer, a first pump system, a continuous dispersion stirring device, a heat exchanger, a buffer tank, a second pump system, and a storage tank;
the material inlet is connected with the pre-stirring machine; the pre-stirring machine, the first pump system, the continuous dispersion stirring equipment, the heat exchanger, the buffer tank, the second pump system and the storage tank are connected in sequence;
the pre-stirring stock solution contains solvent, glue solution and active substances, the pre-stirring is carried out in a pre-stirrer, the pre-stirring stock solution enters a dispersing stirrer device adopting a film convolution method through a first pump system for continuous dispersion stirring, centrifugal turbulence is formed in a barrel, the stock solution is fully stirred, the stock solution is stored in a buffer tank through a heat exchanger, the second pump system is carried out again, the uniformly dispersed liquid is pumped into a storage tank for vacuum defoaming treatment, and then membrane electrode manufacturing is carried out.
4. A fuel cell membrane electrode preparation apparatus according to claim 3 wherein:
the preparation method of the membrane electrode preparation equipment specifically comprises the following steps:
pre-stirring: respectively placing the solvent, the glue solution and the active substances into a feed inlet of a pre-stirring machine, mixing the solvent, the glue solution and the active substances into slurry through rotary stirring under the drive of a motor, and cooling heat generated in the stirring process through a cooling water jacket;
continuously dispersing and stirring: the speed of a rotor of the pre-stirred mixture is regulated in dispersing stirrer equipment through a first pump system, so that the membrane resistance reaches a minimum value, the optimal dispersing condition is determined, and the adopted film convolution method can disperse particles at the nanometer level;
and (3) cooling the cache tank: the slurry with nano-scale is subjected to continuous dispersion stirring and needs to be subjected to cooling treatment in a heat exchanger, and the cooled slurry flows into a buffer tank;
vacuum defoamation: the slurry in the buffer tank enters a storage tank through a second pump system to carry out vacuum defoaming treatment under certain temperature and pressure;
and a membrane electrode manufacturing step: the slurry after vacuum defoamation is made into a membrane electrode by a coating machine with set rotating speed.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TW200924268A (en) * | 2007-11-16 | 2009-06-01 | Hon Hai Prec Ind Co Ltd | Membrane electrode assembly of fuel cell and method of making the same |
| JP2011198503A (en) * | 2010-03-17 | 2011-10-06 | Toppan Printing Co Ltd | Membrane electrode assembly for solid polymer fuel cell and its manufacturing method, fuel cell single cell using it, fuel cell stack |
| CN104600325A (en) * | 2013-11-04 | 2015-05-06 | 中国石油化工股份有限公司 | Fuel cell electrode on-step preparation technology |
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| JP5196988B2 (en) * | 2007-12-21 | 2013-05-15 | スリーエム イノベイティブ プロパティズ カンパニー | Ink composition, method for producing the same, electrode catalyst layer formed using the ink composition, and uses thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200924268A (en) * | 2007-11-16 | 2009-06-01 | Hon Hai Prec Ind Co Ltd | Membrane electrode assembly of fuel cell and method of making the same |
| JP2011198503A (en) * | 2010-03-17 | 2011-10-06 | Toppan Printing Co Ltd | Membrane electrode assembly for solid polymer fuel cell and its manufacturing method, fuel cell single cell using it, fuel cell stack |
| CN104600325A (en) * | 2013-11-04 | 2015-05-06 | 中国石油化工股份有限公司 | Fuel cell electrode on-step preparation technology |
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| Title |
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| 质子交换膜燃料电池膜电极制备方法及部分改进策略;田甜;郑俊生;马建新;;化工进展(09);全文 * |
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