CN112054216A - Electrode slurry for fuel cell and method for producing same - Google Patents
Electrode slurry for fuel cell and method for producing same Download PDFInfo
- Publication number
- CN112054216A CN112054216A CN202010815636.7A CN202010815636A CN112054216A CN 112054216 A CN112054216 A CN 112054216A CN 202010815636 A CN202010815636 A CN 202010815636A CN 112054216 A CN112054216 A CN 112054216A
- Authority
- CN
- China
- Prior art keywords
- fuel cell
- membrane
- electrode
- film
- negative electrode
- 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
Links
Images
Classifications
-
- 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
- H01M4/9008—Organic or organo-metallic compounds
-
- 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
-
- 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
Abstract
The invention discloses an electrode slurry for a fuel cell and a manufacturing method thereof, a manufacturing method of a membrane-electrode assembly for the fuel cell, a manufacturing method of a five-layer membrane-electrode assembly for the fuel cell, and the fuel cell. The present invention discloses an electrode slurry for a fuel cell, comprising: 100 parts by weight of ionomer clusters, 100-200 parts by weight of catalyst and 300-1000 parts by weight of mixed solvent, wherein the mixed solvent comprises deionized water and polyhydric alcohol, and the deionized water and the polyhydric alcohol respectively account for 30-70% of the total volume of the mixed solvent. According to the invention, the specific polyol proportion is controlled, and the size of the ionomer cluster is adjusted to be nano-scale, so that the ionomer is uniformly distributed, the coverage area of the ionomer on a catalyst is reduced, the redox reaction efficiency of the catalyst of the electrode is increased, the high current density of the electrode is ensured, the performance of the battery is improved, and the durability of the battery is also improved.
Description
Technical Field
The present invention relates to a fuel cell technology, and more particularly, to an electrode slurry for a fuel cell and a method for manufacturing the same, a method for manufacturing a membrane-electrode assembly for a fuel cell, a method for manufacturing a five-layer membrane-electrode assembly for a fuel cell, and a fuel cell.
Background
With the development of science and technology, the demand for large-capacity power supplies has increased substantially. However, conventional lithium batteries (secondary batteries) cannot satisfy this demand and have disadvantages of requiring recharging after a short period of use and short life. Therefore, in order to solve this problem, fuel cells characterized by environmental protection, high density energy, and long life have been attracting attention as next-generation power sources.
Such fuel cells may be classified into Polymer Electrolyte Membrane Fuel Cells (PEMFCs), Phosphoric Acid Fuel Cells (PAFCs), Molten Carbonate Fuel Cells (MCFCs), and Solid Oxide Fuel Cells (SOFCs) according to the type of electrolyte used, and the operating temperature of the fuel cells and the materials of the components depend on the electrolyte used. In addition, according to a fuel supply method to the cathode, there are classified into an external reforming type for converting fuel into hydrogen rich gas by a fuel reformer and supplying the hydrogen rich gas to the cathode, and a direct supply type or an internal reforming type for directly supplying gas or liquid fuel to the cathode. The PEMFC can achieve high power density even in a small volume and a light weight, and has an advantage in that the construction of a power generation system can be simplified using the PEMFC, and thus can be suitably used in the transportation and construction fields.
The basic structure of a fuel cell is generally composed of a cathode electrode (fuel electrode), an anode electrode (oxidant electrode) and an electrolyte membrane structure disposed therebetween, and is called a membrane-electrode assembly (3-Layer). The positive electrode has a catalyst layer for promoting oxidation of the fuel, and the negative electrode has a catalyst layer for promoting reduction of the oxidant. In the positive electrode, the fuel is oxidized to generate hydrogen ions and electrons, the hydrogen ions are transferred to the negative electrode through the electrolyte membrane, and the electrons are transferred to an external circuit (load) through a conductor (or a current collector). In the anode, hydrogen ions transmitted through the electrolyte membrane, and electrons and oxygen transmitted from an external circuit through a conductor (or a current collector) are mixed together to generate water. At this time, electrons move from the positive electrode to the negative electrode through the external conductor to generate electricity. The redox reaction of the above-mentioned electrode depends on the dispersion of the catalyst and the binder, and shows a great difference. Such a difference indicates that the difference in current density and durability affects the performance of the fuel cell, and thus the electrode design is one of the core technologies of the fuel cell.
The above-mentioned electrode slurry for fuel cells is usually produced by mixing a solvent of 1-propanol or IPA (isopropyl alcohol) having a low boiling point and being easily dried with deionized water at a constant ratio. However, the slurry prepared by the above method increases the cluster size of the binder for preparing the electrode slurry, and the viscosity of the solvent itself is low, resulting in low mutual stability of the slurries, and the electrode slurry is delaminated at a very high speed, resulting in difficulty in mass production. The above-fabricated electrode must be laminated with more membrane-electrode assemblies in order to be used in a fuel cell because of low current density and electrode durability due to uneven distribution of the binder.
Disclosure of Invention
According to an embodiment of the present invention, there is provided an electrode slurry for a fuel cell, including: 100 parts by weight of ionomer clusters, 100-200 parts by weight of catalyst and 300-1000 parts by weight of mixed solvent, wherein the mixed solvent comprises deionized water and polyhydric alcohol, and the deionized water and the polyhydric alcohol respectively account for 30-70% of the total volume of the mixed solvent.
Further, the ionomer clusters include, but are not limited to, combinations of one or more of the following: fluoropolymers, benzimidazole polymers, polyimide polymers, polyetherimide polymers, polyphenylene sulfide polymers, polysulfone polymers, polyethersulfone polymers, polyetherketone polymers, polyetheretherketone polymers, polyphenylquinoxaline polymers.
Further, the average size of the ionomer cluster is 30 to 90 nm.
Further, the catalyst includes, but is not limited to, combinations of one or more of the following: platinum, ruthenium, osmium, platinum/ruthenium alloys, platinum/osmium alloys, platinum/palladium alloys, platinum/M alloys, M including but not limited to combinations of one or more of the following: ga. Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Sn, Mo, W, Rh, Ru.
Further, the average particle diameter of the catalyst particles is 0.01 to 5 μm.
Further, the polyol includes, but is not limited to, combinations of one or more of the following: C1-C6 alkanes substituted with 2-4 hydroxyl groups, C1-C6 haloalkanes substituted with 2-4 hydroxyl groups.
Further, the polyol includes, but is not limited to, combinations of one or more of the following: propylene glycol, dipropylene glycol, glycerol.
Further, the viscosity of the electrode slurry for fuel cells is 50 to 10000 cps.
Furthermore, the loading range of the catalyst is 0.01-0.7 mg/cm2。
According to still another embodiment of the present invention, there is provided a method of manufacturing an electrode slurry for a fuel cell, including the steps of:
drying and curing the ionomer adhesive to obtain the ionomer adhesive with the particle size of not more than 1 mu m;
further drying the ionomer binder;
adding a polyol to the ionomer binder to disperse the ionomer binder;
adding deionized water into the ionomer adhesive;
rotating the mixed solution of deionized water, polyol and ionomer binder to further disperse the ionomer binder to obtain an ionomer binder solution;
adding a catalyst to the ionomer binder solution;
adding polyhydric alcohol and deionized water, and uniformly mixing to obtain a catalyst slurry solution;
and rotating the catalyst slurry solution to obtain the electrode slurry for the fuel cell.
Further, the water content of the ionomer binder after further drying of the ionomer binder is less than 10%.
Further, after adding a polyol to the ionomer binder after further drying, the solids content of the ionomer binder was 15%.
Further, the weight of deionized water in the ionomer binder solution was 50% of the weight of the polyol.
Further, the solids content of the ionomer binder in the ionomer binder solution was 8.8%.
Further, the volume of the deionized water accounts for 30-70% of the total volume of the deionized water and the electrode slurry for the fuel cell.
According to still another embodiment of the present invention, there is provided a method of manufacturing a membrane-electrode assembly for a fuel cell, including the steps of:
coating the electrode slurry for the fuel cell of the embodiment on a release film, and respectively coating the release film with different thicknesses to respectively obtain an anode film and a cathode film;
drying the anode film and the cathode film;
respectively placing the dried anode membrane and the dried cathode membrane on two sides of the electrolyte membrane;
and pressurizing and heating the attached positive electrode film, negative electrode film and electrolyte film to obtain the membrane-electrode assembly.
Further, the thickness range of the positive electrode film and the negative electrode film is 5-20 μm.
Further, the positive electrode film and the negative electrode film are dried through a drying area, the temperature range of the drying area is 50-120 ℃, and the temperature of the drying area is gradually increased or decreased according to the sequence of drying the positive electrode film and the negative electrode film.
Further, the drying area comprises six temperature zones, and the temperatures of the six temperature zones are as follows according to the sequence of drying the positive electrode film and the negative electrode film: 50 deg.C, 60 deg.C, 70 deg.C, 80 deg.C, 60 deg.C.
Further, the length of each temperature zone is 2m, and the speed of drying the positive electrode film and the negative electrode film is 1 m/min.
Further, the pressure range of pressurizing and heating the attached positive electrode film, negative electrode film and electrolyte film is 10 to 100kgf/cm2The temperature is 50-300 ℃.
Further, the time range of the pressurization and heating is 0.1-60 minutes.
According to still another embodiment of the present invention, there is provided a method of manufacturing a five-layer membrane-electrode assembly for a fuel cell, including the steps of:
coating the electrode slurry for the fuel cell of the embodiment on a gas diffusion layer, respectively coating the electrode slurry with different thicknesses to manufacture a positive electrode membrane and a negative electrode membrane, and obtaining the gas diffusion layer coated with the positive electrode membrane and the gas diffusion layer coated with the negative electrode membrane;
drying the anode film and the cathode film;
respectively placing the gas diffusion layer coated with the negative electrode film and the gas diffusion layer coated with the negative electrode film on two sides of the electrolyte film, and respectively attaching the positive electrode film and the negative electrode film to the electrolyte film;
and pressurizing and heating the attached gas diffusion layer coated with the negative electrode film, the gas diffusion layer coated with the negative electrode film and the electrolyte film to obtain the five-layer membrane-electrode assembly.
Further, the thickness of the positive electrode film and the negative electrode film is 5 to 20 μm.
Further, the positive electrode film and the negative electrode film are dried through a drying area, the temperature range of the drying area is 50-120 ℃, and the temperature of the drying area is gradually increased or decreased according to the sequence of drying the positive electrode film and the negative electrode film.
Further, the drying area comprises six temperature zones, and the temperatures of the six temperature zones are as follows according to the sequence of drying the positive electrode film and the negative electrode film: 50 deg.C, 60 deg.C, 70 deg.C, 80 deg.C, 60 deg.C.
Further, the length of each temperature zone is 2m, and the speed of drying the positive electrode film and the negative electrode film is 1 m/min.
Further, the pressure range of the applied gas diffusion layer coated with the negative electrode film, the gas diffusion layer coated with the negative electrode film and the electrolyte film is 10 to 100kgf/cm2The temperature is 50-300 ℃.
Further, the time range of the pressurization and heating is 0.1-60 minutes.
According to still another embodiment of the present invention, there is provided a fuel cell including the membrane-electrode assembly manufactured by the above method for manufacturing a membrane-electrode assembly for a fuel cell, or including the five-layer membrane-electrode assembly manufactured by the above method for manufacturing a five-layer membrane-electrode assembly for a fuel cell.
According to the electrode slurry for the fuel cell and the manufacturing method thereof, the manufacturing method of the membrane-electrode assembly for the fuel cell, the manufacturing method of the five-layer membrane-electrode assembly for the fuel cell and the fuel cell, the ionomer cluster is adjusted to be in a nanometer size by controlling the specific polyol proportion, so that the ionomer is uniformly distributed, the coverage area of the ionomer on a catalyst is reduced, the redox reaction efficiency of the catalyst of the electrode is increased, the high current density of the electrode is ensured, the cell performance is improved, and the durability of the cell is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and are intended to provide further explanation of the claimed technology.
Drawings
Fig. 1 is a method flowchart of a method of manufacturing an electrode slurry for a fuel cell according to an embodiment of the present invention;
FIG. 2 is a method flow diagram of a method of manufacturing a membrane-electrode assembly for a fuel cell according to an embodiment of the present invention;
fig. 3 is a process flow diagram of a method of manufacturing a five-layer membrane-electrode assembly for a fuel cell in accordance with an embodiment of the invention.
Detailed Description
The present invention will be further explained by describing preferred embodiments of the present invention in detail with reference to the accompanying drawings.
First, an electrode slurry for a fuel cell according to an embodiment of the present invention, which is used for a polymer electrolyte membrane fuel cell, is described, and the application scenarios thereof are wide.
An electrode slurry for a fuel cell according to an embodiment of the present invention includes: 100 parts by weight of ionomer clusters, 100-200 parts by weight of catalyst and 300-1000 parts by weight of mixed solvent, wherein the mixed solvent comprises deionized water and polyhydric alcohol, and the deionized water and the polyhydric alcohol respectively account for 30-70% of the total volume of the mixed solvent. In this embodiment, the viscosity of the electrode slurry for a fuel cell is 50 to 10000cps, and if the viscosity is less than 50cps or more than 10000cps, there is a problem that it is difficult to be applied to equipment and catalyst loading.
Furthermore, in the embodiment, the loading amount of the catalyst is in the range of 0.01-0.7 mg/cm2The loading of the catalyst is less than 0.01mg/cm2The amount of current obtained is low and the thickness of the electrode for a fuel cell manufactured based on the electrode slurry for a fuel cell of the embodiment of the present invention is low, so that it is difficult to form pores and it is difficult to drain water, resulting in low cell performance; if the loading of the catalyst is more than 0.7mg/cm2Too thick thickness of the electrode leads to increase in resistance, resulting in degradation of battery performance, and excessive loading causes product cost and cost due to high price of the catalystThe price is increased, which is not favorable for marketization.
Further, the ionomer clusters include, but are not limited to, combinations of one or more of the following: fluoropolymers, benzimidazole polymers, polyimide polymers, polyetherimide polymers, polyphenylene sulfide polymers, polysulfone polymers, polyethersulfone polymers, polyetherketone polymers, polyetheretherketone polymers, polyphenylquinoxaline polymers. In the embodiment, the average size of the ionomer cluster can be reduced to 30-90 nm by the proportion of the polyol, the maximization of the interface area between the ionomer cluster and the catalyst is ensured, namely, the ionomer is uniformly distributed, the coverage area of the ionomer to the catalyst is also reduced, the redox reaction efficiency of the catalyst of the electrode is increased, the high current density of the electrode is ensured, the performance of the battery is improved, and the durability of the battery is also improved.
Further, the catalyst includes, but is not limited to, combinations of one or more of the following: platinum, ruthenium, osmium, platinum/ruthenium alloys, platinum/osmium alloys, platinum/palladium alloys, platinum/M alloys, wherein M includes, but is not limited to, combinations of one or more of the following: ga. Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Sn, Mo, W, Rh, Ru. In this example, the average particle diameter of the catalyst particles is 0.01 to 5 μm, which causes a phenomenon that the ionomer blocks the surface of the catalyst if the particle diameter of the catalyst is too small, and causes excessive slurry to be discharged and to block the nozzle of the tank coater of the production equipment if the particle diameter is too large.
Further, the polyol includes, but is not limited to, combinations of one or more of the following: C1-C6 alkanes substituted with 2-4 hydroxyl groups, C1-C6 haloalkanes substituted with 2-4 hydroxyl groups. Preferably, the polyol includes, but is not limited to, combinations of one or more of the following: propylene glycol, dipropylene glycol, glycerol.
As described above, in the electrode slurry for a fuel cell according to the embodiment of the present invention, the size of the ionomer cluster is adjusted to a nano level by controlling a specific polyol ratio, so that not only is the ionomer uniformly distributed, but also the catalyst coverage area of the ionomer is reduced, the redox reaction efficiency of the catalyst of the electrode is increased, and not only is the high current density of the electrode ensured, and the cell performance is improved, but also the durability of the cell is improved.
The electrode slurry for a fuel cell according to the embodiment of the invention is described above. Further, the present invention can also be applied to a method for producing an electrode slurry for a fuel cell.
As shown in fig. 1, the method for manufacturing an electrode paste for a fuel cell according to an embodiment of the present invention includes the steps of:
in S11, the ionomer binder is dried and cured to obtain an ionomer binder having a particle size of not more than 1 μm.
In S12, the ionomer binder is further dried until the water content of the ionomer binder is less than 10%.
In S13, a polyol is added to the ionomer binder to disperse the ionomer binder to a solids content of 15% of the ionomer binder.
In S14, deionized water is added to the ionomer binder.
In S15, the ionomer binder solution is obtained by rotating the mixed solution of deionized water, polyol and ionomer binder to further disperse the ionomer binder, wherein the weight of deionized water in the ionomer binder solution is 50% of the weight of polyol and the solids content of ionomer binder is 8.8%.
In S16, a catalyst is added to the ionomer binder solution.
Adding polyalcohol and deionized water into the S17, and uniformly mixing to obtain a catalyst slurry solution;
in S18, the catalyst slurry solution is rotated to obtain an electrode slurry for a fuel cell, wherein the volume of the deionized water accounts for 30-70% of the total volume of the deionized water and the electrode slurry for a fuel cell.
As described above, in the method for manufacturing an electrode slurry for a fuel cell according to an embodiment of the present invention, the ionomer cluster is adjusted to a nano-scale by controlling a specific polyol ratio, so that not only is the ionomer uniformly distributed, but also the catalyst coverage area of the ionomer is reduced, the redox reaction efficiency of the catalyst of the electrode is increased, and not only is the high current density of the electrode ensured, and the cell performance is improved, but also the durability of the cell is improved.
The method of manufacturing an electrode paste for a fuel cell according to an embodiment of the present invention is described above with reference to fig. 1. Further, the present invention can also be applied to a manufacturing method of a membrane-electrode assembly for a fuel cell.
As shown in fig. 2, the method for manufacturing a membrane-electrode assembly for a fuel cell according to an embodiment of the present invention includes the steps of:
in S21, the electrode slurry for fuel cells of the above-described example was coated onto a release film to be coated to different thicknesses, respectively, and the electrodes were used as a positive electrode and a negative electrode, that is, a positive electrode film and a negative electrode film were obtained, respectively, depending on the type of catalyst used; in this embodiment, the release film is PEN, PI, or PET film, and the motor paste is applied to the release film by a coater, which may be a slot die coater, comma coater, knife coater, gravure coater, bar coater, or lip coater, and the type of the coater is not particularly limited as long as it is a coater used in the art and can form electrodes of a predetermined pattern on the release film repeatedly or intermittently.
Drying the positive electrode film and the negative electrode film through the drying region in S22; in this embodiment, the thickness of the positive electrode film and the negative electrode film after drying is preferably 5 to 20 μm. If the thickness is less than 5 μm, fuel supply is not smooth and water discharge is not smooth, resulting in a decrease in electrode performance; if the thickness is more than 20 μm, the conductive resistance of the electrode increases, resulting in degradation of battery performance.
Further, in the embodiment, the temperature range of the drying area is controlled to be 50-120 ℃, and the temperature of the drying area is gradually increased or decreased according to the sequence of drying the positive electrode film and the negative electrode film.
Further, the drying area comprises six temperature zones, and the temperatures of the six temperature zones are as follows according to the sequence of drying the positive electrode film and the negative electrode film: 50 ℃, 60 ℃, 70 ℃, 80 ℃ and 60 ℃ are all in the range of 50-120 ℃. Wherein, the length of each temperature zone is 2m, and the speed of drying the positive electrode film and the negative electrode film is 1 m/min.
In S23, the dried positive electrode film and negative electrode film are placed on both sides of the electrolyte membrane, respectively.
In S24, the joined positive electrode film, negative electrode film, and electrolyte film are subjected to pressure heating to obtain a membrane-electrode assembly, i.e., an electrode-membrane-electrode assembly (3-Layer). In this embodiment, the pressure range of the pressure heating is 10 to 100kgf/cm2The temperature is 50-300 deg.C, the time is 0.1-60 min, and the pressure is preferably 20kgf/cm2The temperature was 160 ℃.
As described above, in the method of manufacturing a membrane-electrode assembly for a fuel cell according to an embodiment of the present invention, by using an electrode made of the electrode slurry for a fuel cell according to an embodiment of the present invention, the redox reaction efficiency of a catalyst of the electrode is increased, and the high current density of the electrode is ensured, the cell performance is improved, and the durability of the cell is also improved.
The method of manufacturing the membrane-electrode assembly for a fuel cell according to the embodiment of the invention is described above with reference to fig. 3. Further, the present invention can also be applied to a manufacturing method of a five-layer membrane-electrode assembly for a fuel cell.
As shown in fig. 3, the method for manufacturing a five-layer membrane-electrode assembly for a fuel cell according to an embodiment of the present invention includes the steps of:
in S31, the electrode slurry for fuel cells of the above example was applied to gas diffusion layers, respectively coated to different thicknesses, and the electrodes were used as a positive electrode and a negative electrode, respectively, depending on the type of catalyst used, to produce a positive electrode film and a negative electrode film, respectively, to produce a gas diffusion layer coated with a positive electrode film and a gas diffusion layer coated with a negative electrode film; in the present embodiment, the motor slurry is applied to the gas diffusion layer by a coater, which may be a slot die coater, comma coater, knife coater, gravure coater, bar coater or lip coater, and the type of the coater is not particularly limited as long as it is a coater used in the art and can repeatedly or intermittently form electrodes having a predetermined pattern on the gas diffusion layer.
Drying the gas diffusion layer coated with the positive electrode membrane and the gas diffusion layer coated with the negative electrode membrane through a drying area in S32; in this embodiment, the thickness of the positive electrode film and the negative electrode film after drying is preferably 5 to 20 μm. If the thickness is less than 5 μm, fuel supply is not smooth and water discharge is not smooth, resulting in a decrease in electrode performance; if the thickness is more than 20 μm, the conductive resistance of the electrode increases, resulting in degradation of battery performance.
Further, in the embodiment, the temperature range of the drying area is controlled to be 50-120 ℃, and the temperature of the drying area is gradually increased or decreased according to the sequence of drying the positive electrode film and the negative electrode film.
Further, the drying area comprises six temperature zones, and the temperatures of the six temperature zones are as follows according to the sequence of drying the positive electrode film and the negative electrode film: 50 ℃, 60 ℃, 70 ℃, 80 ℃ and 60 ℃ are all in the range of 50-120 ℃. Wherein, the length of each temperature zone is 2m, and the speed of drying the positive electrode film and the negative electrode film is 1 m/min.
In S33, the gas diffusion layer coated with the negative electrode film and the gas diffusion layer coated with the negative electrode film are respectively placed on both sides of the electrolyte membrane, wherein the positive electrode film and the negative electrode film are respectively attached to the electrolyte membrane.
In S34, the joined gas diffusion Layer coated with the negative electrode film, and electrolyte membrane are subjected to pressure heating, and a five-Layer membrane-electrode assembly of "gas diffusion Layer-electrode-electrolyte membrane-electrode-gas diffusion Layer", i.e., 5-Layer, is obtained. In this embodiment, the pressure range of the pressure heating is 10 to 100kgf/cm2The temperature is 50-300 deg.C, the time is 0.1-60 min, and the pressure is preferably 20kgf/cm2The temperature was 160 ℃.
As described above, in the method of manufacturing a five-layer membrane-electrode assembly for a fuel cell according to an embodiment of the present invention, by using an electrode made of the electrode slurry for a fuel cell according to an embodiment of the present invention, the redox reaction efficiency of a catalyst of the electrode is increased, and the high current density of the electrode is ensured, the cell performance is improved, and the durability of the cell is also improved.
The method of manufacturing a five-layer membrane-electrode assembly for a fuel cell according to an embodiment of the present invention is described above with reference to fig. 3. Further, the present invention can also be applied to a fuel cell.
According to still another embodiment of the present invention, there is provided a fuel cell including the membrane-electrode assembly manufactured by the method for manufacturing a membrane-electrode assembly for a fuel cell of the above-described embodiment, or a five-layer membrane-electrode assembly manufactured by the method for manufacturing a five-layer membrane-electrode assembly for a fuel cell of the above-described embodiment.
Among them, in a fuel cell including a five-layer membrane-electrode assembly, a gas diffusion layer is used to supply fuel and discharge generated water, a gas diffusion layer coated with a positive electrode membrane is used to supply fuel to a flow path of a positive electrode and serves as an 'electron conductor' for transferring electrons generated from the positive electrode to an 'external circuit' or an adjacent 'unit cell', a gas diffusion layer coated with a negative electrode membrane is used to supply an oxidant to a flow path of a negative electrode and serves as an 'electron conductor' for transferring electrons supplied from the circuit and an adjacent unit cell power source to the negative electrode.
As described above, in the fuel cell according to the embodiment of the present invention, by using the electrode made of the electrode slurry for a fuel cell according to the embodiment of the present invention, the redox reaction efficiency of the catalyst of the electrode is increased, and the high current density of the electrode is ensured, the cell performance is improved, and the durability of the cell is also improved.
In the above, referring to fig. 1 to 3, an electrode slurry for a fuel cell and a manufacturing method thereof, a manufacturing method of a membrane-electrode assembly for a fuel cell, a manufacturing method of a five-layer membrane-electrode assembly for a fuel cell, and a fuel cell according to embodiments of the present invention are described, wherein the ionomer cluster is adjusted to a nano-scale by controlling a specific polyol ratio, so that not only is the ionomer uniformly distributed, but also the catalyst coverage area of the ionomer is reduced, the redox reaction efficiency of the catalyst of the electrode is increased, and not only is the high current density of the electrode ensured, and the cell performance is improved, but also the durability of the cell is improved.
It should be noted that, in the present specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (30)
1. An electrode slurry for a fuel cell, comprising: the catalyst comprises 100 parts by weight of ionomer clusters, 100-200 parts by weight of a catalyst and 300-1000 parts by weight of a mixed solvent, wherein the mixed solvent comprises deionized water and polyhydric alcohol, and the deionized water and the polyhydric alcohol respectively account for 30-70% of the total volume of the mixed solvent.
2. The fuel cell electrode slurry of claim 1 in which the ionomer clusters comprise, but are not limited to, combinations of one or more of the following: fluoropolymers, benzimidazole polymers, polyimide polymers, polyetherimide polymers, polyphenylene sulfide polymers, polysulfone polymers, polyethersulfone polymers, polyetherketone polymers, polyetheretherketone polymers, polyphenylquinoxaline polymers.
3. The fuel cell electrode slurry according to claim 2, wherein the ionomer clusters have an average size of 30 to 90 nm.
4. The fuel cell electrode slurry of claim 1, wherein the catalyst comprises, but is not limited to, a combination of one or more of the following: platinum, ruthenium, osmium, platinum/ruthenium alloys, platinum/osmium alloys, platinum/palladium alloys, platinum/M alloys, including but not limited to combinations of one or more of the following: ga. Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Sn, Mo, W, Rh, Ru.
5. The electrode slurry for a fuel cell according to claim 4, wherein the average particle diameter of the catalyst particles is 0.01 to 5 μm.
6. The fuel cell electrode slurry of claim 1, wherein the polyol comprises, but is not limited to, a combination of one or more of the following: C1-C6 alkanes substituted with 2-4 hydroxyl groups, C1-C6 haloalkanes substituted with 2-4 hydroxyl groups.
7. The fuel cell electrode slurry of claim 6, wherein the polyol comprises, but is not limited to, a combination of one or more of the following: propylene glycol, dipropylene glycol, glycerol.
8. The fuel cell electrode slurry according to claim 1, wherein the viscosity of the fuel cell electrode slurry is 50 to 10000 cps.
9. The electrode slurry for a fuel cell according to claim 1, wherein the catalyst is supported in an amount ranging from 0.01 to 0.7mg/cm2。
10. A method for manufacturing an electrode slurry for a fuel cell, comprising the steps of:
drying and curing the ionomer adhesive to obtain the ionomer adhesive with the particle size of not more than 1 mu m;
further drying the ionomer binder;
adding a polyol to the ionomer binder to disperse the ionomer binder;
adding deionized water into the ionomer adhesive;
rotating the mixed solution of the deionized water, the polyol and the ionomer binder to further disperse the ionomer binder to obtain an ionomer binder solution;
adding a catalyst to the ionomer binder solution;
adding the polyalcohol and the deionized water, and uniformly mixing to obtain a catalyst slurry solution;
and rotating the catalyst slurry solution to obtain the electrode slurry for the fuel cell.
11. The method of manufacturing an electrode slurry for a fuel cell according to claim 10, wherein the ionomer binder has a water content of less than 10% after further drying of the ionomer binder.
12. The method for producing an electrode slurry for a fuel cell according to claim 11, wherein the ionomer binder after further drying has a solid content of 15% after the polyol is added thereto.
13. The method of making an electrode slurry for a fuel cell according to claim 10, wherein the weight of the deionized water in the ionomer binder solution is 50% of the weight of the polyol.
14. The method of manufacturing an electrode slurry for a fuel cell according to claim 10, wherein the ionomer binder solution has a solid content of the ionomer binder of 8.8%.
15. The method for manufacturing an electrode slurry for a fuel cell according to claim 10, wherein the volume of the deionized water is 30 to 70% of the total volume of the deionized water and the electrode slurry for a fuel cell.
16. A method of manufacturing a membrane-electrode assembly for a fuel cell, comprising the steps of:
coating the electrode slurry for a fuel cell according to any one of claims 1 to 9 on a release film, and coating the release film with different thicknesses to obtain a positive electrode film and a negative electrode film respectively;
drying the positive electrode film and the negative electrode film;
respectively placing the dried positive electrode film and the dried negative electrode film on two sides of an electrolyte film;
and pressurizing and heating the attached positive electrode film, the attached negative electrode film and the electrolyte film to obtain a membrane-electrode assembly.
17. The method of manufacturing a membrane-electrode assembly for a fuel cell according to claim 16, wherein the thickness of the positive electrode film and the negative electrode film is in a range of 5 to 20 μm.
18. The method of manufacturing a membrane-electrode assembly for a fuel cell according to claim 16, wherein the positive electrode membrane and the negative electrode membrane are dried by a drying section having a temperature ranging from 50 to 120 ℃, and the temperature of the drying section is gradually increased or decreased in the order of drying the positive electrode membrane and the negative electrode membrane.
19. The method of manufacturing a membrane-electrode assembly for a fuel cell according to claim 18, wherein the baking section includes six temperature zones, the temperatures of the six temperature zones being, in order of baking the positive electrode membrane and the negative electrode membrane: 50 deg.C, 60 deg.C, 70 deg.C, 80 deg.C, 60 deg.C.
20. The method of manufacturing a membrane-electrode assembly for a fuel cell according to claim 19, wherein the length of each temperature zone is 2m, and the speed of drying the positive electrode membrane and the negative electrode membrane is 1 m/min.
21. The method of manufacturing a membrane-electrode assembly for a fuel cell according to claim 16, which comprisesCharacterized in that the pressure range of pressurizing and heating the attached positive electrode film, negative electrode film and electrolyte film is 10 to 100kgf/cm2The temperature is 50-300 ℃.
22. The method of manufacturing a membrane-electrode assembly for a fuel cell according to claim 21, wherein the pressure-heating time is in a range of 0.1 to 60 minutes.
23. A method of manufacturing a five-layer membrane-electrode assembly for a fuel cell, comprising the steps of:
coating the electrode slurry for the fuel cell according to any one of claims 1 to 9 on a gas diffusion layer, and coating the electrode slurry with different thicknesses to manufacture a positive electrode membrane and a negative electrode membrane respectively, thereby obtaining the gas diffusion layer coated with the positive electrode membrane and the gas diffusion layer coated with the negative electrode membrane;
drying the positive electrode film and the negative electrode film;
respectively placing the gas diffusion layer coated with the negative electrode film and the gas diffusion layer coated with the negative electrode film on two sides of an electrolyte film, and respectively attaching the positive electrode film and the negative electrode film to the electrolyte film;
and pressurizing and heating the attached gas diffusion layer coated with the negative electrode film, the gas diffusion layer coated with the negative electrode film and the electrolyte membrane to obtain the five-layer membrane-electrode assembly.
24. The method of manufacturing a five-layer membrane-electrode assembly for a fuel cell according to claim 23, wherein the thickness of the positive electrode film and the negative electrode film is in the range of 5 to 20 μm.
25. The method of manufacturing a five-layer membrane-electrode assembly for a fuel cell according to claim 23, wherein the positive electrode membrane and the negative electrode membrane are dried by a drying zone having a temperature ranging from 50 to 120 ℃, and the temperature of the drying zone is gradually increased or decreased in the order of drying the positive electrode membrane and the negative electrode membrane.
26. The method of manufacturing a five-layer membrane-electrode assembly for a fuel cell according to claim 25, wherein the baking section comprises six temperature zones, in the order of baking the positive electrode membrane and the negative electrode membrane, the six temperature zones having, in order: 50 deg.C, 60 deg.C, 70 deg.C, 80 deg.C, 60 deg.C.
27. The method of manufacturing a five-layer membrane-electrode assembly for a fuel cell according to claim 26, wherein the length of each temperature zone is 2m, and the speed of drying the positive electrode membrane and the negative electrode membrane is 1 m/min.
28. The method of manufacturing a five-layer membrane-electrode assembly for a fuel cell according to claim 23, wherein the pressure range of the applied gas diffusion layer coated with the negative electrode membrane, the gas diffusion layer coated with the negative electrode membrane, and the electrolyte membrane is 10 to 100kgf/cm by applying pressure and heat2The temperature is 50-300 ℃.
29. The method of manufacturing a membrane-electrode assembly for a fuel cell according to claim 28, wherein the pressure-heating time is in the range of 0.1 to 60 minutes.
30. A fuel cell comprising the membrane-electrode assembly produced by the method for producing a five-layer membrane-electrode assembly for a fuel cell according to any one of claims 16 to 22, or comprising the five-layer membrane-electrode assembly produced by the method for producing a five-layer membrane-electrode assembly for a fuel cell according to any one of claims 23 to 29.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010815636.7A CN112054216A (en) | 2020-08-14 | 2020-08-14 | Electrode slurry for fuel cell and method for producing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010815636.7A CN112054216A (en) | 2020-08-14 | 2020-08-14 | Electrode slurry for fuel cell and method for producing same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112054216A true CN112054216A (en) | 2020-12-08 |
Family
ID=73601720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010815636.7A Pending CN112054216A (en) | 2020-08-14 | 2020-08-14 | Electrode slurry for fuel cell and method for producing same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112054216A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114005995A (en) * | 2021-11-01 | 2022-02-01 | 天津理工大学 | Preparation method of flexible metal electrode |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219402A (en) * | 2006-05-16 | 2008-07-16 | 三星Sdi株式会社 | Supported catalyst, method of preparing the same, and fuel cell using the same |
| CN101453021A (en) * | 2007-12-04 | 2009-06-10 | 韩华石油化学株式会社 | Method for preparing self-supporting electrode by using porous carrier of electrode catalyst for fuel cell and membrane electrode assembly containing the electrode |
| CN101682995A (en) * | 2007-05-24 | 2010-03-24 | 巴斯夫欧洲公司 | Production is by the method for the substrate laminated material of washing |
| US20130040222A1 (en) * | 2011-08-11 | 2013-02-14 | Samsung Sdi Co., Ltd. | Catalyst layer composition for fuel cell, electrode for fuel cell, method of preparing electrode for fuel cell, membrane-electrode assembly for fuel cell, and fuel cell system using the membrane-electrode assembly |
| CN109863193A (en) * | 2016-10-28 | 2019-06-07 | 哈特奇桑公司 | For the method for poly- (alkene carbonic ester) of degrading, it is used to prepare the purposes of lithium ion cell electrode and sintering ceramics |
-
2020
- 2020-08-14 CN CN202010815636.7A patent/CN112054216A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219402A (en) * | 2006-05-16 | 2008-07-16 | 三星Sdi株式会社 | Supported catalyst, method of preparing the same, and fuel cell using the same |
| CN101682995A (en) * | 2007-05-24 | 2010-03-24 | 巴斯夫欧洲公司 | Production is by the method for the substrate laminated material of washing |
| CN101453021A (en) * | 2007-12-04 | 2009-06-10 | 韩华石油化学株式会社 | Method for preparing self-supporting electrode by using porous carrier of electrode catalyst for fuel cell and membrane electrode assembly containing the electrode |
| US20130040222A1 (en) * | 2011-08-11 | 2013-02-14 | Samsung Sdi Co., Ltd. | Catalyst layer composition for fuel cell, electrode for fuel cell, method of preparing electrode for fuel cell, membrane-electrode assembly for fuel cell, and fuel cell system using the membrane-electrode assembly |
| CN109863193A (en) * | 2016-10-28 | 2019-06-07 | 哈特奇桑公司 | For the method for poly- (alkene carbonic ester) of degrading, it is used to prepare the purposes of lithium ion cell electrode and sintering ceramics |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114005995A (en) * | 2021-11-01 | 2022-02-01 | 天津理工大学 | Preparation method of flexible metal electrode |
| CN114005995B (en) * | 2021-11-01 | 2023-11-10 | 天津理工大学 | Preparation method of flexible metal electrode |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10923752B2 (en) | Membrane-electrode assembly, method for manufacturing same, and fuel cell comprising same | |
| US8323848B2 (en) | Membrane-electrode assembly for fuel cell, preparation method, and fuel cell comprising the same | |
| KR100779820B1 (en) | Direct oxidation fuel cell and manufacturing method therefor | |
| CN111149244B (en) | Electrode catalyst layer, membrane electrode assembly, and solid polymer fuel cell | |
| US20190280307A1 (en) | Composite electrode layer for polymer electrolyte fuel cell | |
| EP2365569B1 (en) | A membrane-electrode assembly for a fuel cell | |
| KR20110043908A (en) | Membrane electrode assembly(mea) fabrication procedure on polymer electrolyte membrane fuel cell | |
| JP2004192950A (en) | Solid polymer fuel cell and its manufacturing method | |
| JP2008300347A (en) | Method of manufacturing five-layer mea with electrical conductivity improved | |
| CN111095641B (en) | Method for producing membrane electrode assembly and laminate | |
| CN112054216A (en) | Electrode slurry for fuel cell and method for producing same | |
| JP2004247294A (en) | Power generation element for fuel cell, its manufacturing method, and fuel cell using power generation element | |
| KR20090027527A (en) | Membrane-electrode assembly for fuel cell, method of producing same and fuel cell system comprising same | |
| KR102455396B1 (en) | Catalyst ink for forming electrode catalyst layer of fuel cell and manufacturing method thereof | |
| JP2007128665A (en) | Electrode catalyst layer for fuel cell, and manufacturing method of membrane-electrode assembly using it | |
| JP5326458B2 (en) | Membrane electrode assembly, method for producing the same, and polymer electrolyte fuel cell | |
| JP5885007B2 (en) | Manufacturing method of electrode sheet for fuel cell | |
| JP2006147522A (en) | Manufacturing method for membrane electrode assembly, fuel cell and manufacturing method for conductive particle layer | |
| JP2009026536A (en) | Electrolyte membrane-electrode assembly for solid polymer fuel cell and manufacturing method thereof, catalyst transfer film used for this, and solid polymer fuel cell | |
| JP4787474B2 (en) | Method for producing laminated film for membrane-electrode assembly | |
| JP3619826B2 (en) | Fuel cell electrode and fuel cell | |
| JP2006107877A (en) | Power generating element for liquid fuel battery, manufacturing method of the same, and liquid fuel battery | |
| KR20090039423A (en) | Membrane electrode assembly for fuel cell and fuel cell system including same | |
| KR20140146014A (en) | Electrolyte membrane, method for manufacturing the same and membrane eletrode assembly and fuel cell comprising the same | |
| JP2022095263A (en) | Catalyst ink for polymer electrolyte fuel cell, catalyst layer for polymer electrolyte fuel cell, and membrane-electrode assembly for polymer electrolyte fuel cell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201208 |
|
| RJ01 | Rejection of invention patent application after publication |