CN112838222A - Binder for promoting interface binding force of gas diffusion layer and CCM of fuel cell and preparation method thereof - Google Patents

Binder for promoting interface binding force of gas diffusion layer and CCM of fuel cell and preparation method thereof Download PDF

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Publication number
CN112838222A
CN112838222A CN202011643150.6A CN202011643150A CN112838222A CN 112838222 A CN112838222 A CN 112838222A CN 202011643150 A CN202011643150 A CN 202011643150A CN 112838222 A CN112838222 A CN 112838222A
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glue
ccm
gdl
bonding
binder
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王倩
许亭
陈桂银
王强
邢丹敏
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Sunrise Power Co Ltd
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Sunrise Power Co Ltd
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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
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88—Processes of manufacture
    • H01M4/8875—Methods for shaping the electrode into free-standing bodies, like sheets, films or grids, e.g. moulding, hot-pressing, casting without support, extrusion without support
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J101/00—Adhesives based on cellulose, modified cellulose, or cellulose derivatives
    • C09J101/08—Cellulose derivatives
    • C09J101/26—Cellulose ethers
    • C09J101/28—Alkyl ethers
    • C09J101/286—Alkyl ethers substituted with acid radicals
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J171/00—Adhesives based on polyethers obtained by reactions forming an ether link in the main chain; Adhesives based on derivatives of such polymers
    • C09J171/02—Polyalkylene oxides
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
    • 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 a method for bonding a gas diffusion layer and a CCM interface of a fuel cell, which comprises the following steps: firstly, dissolving and diluting a binder by using a solvent to obtain glue, and distributing the glue on the surface of the microporous layer in a spot coating or spraying manner; bonding one surface of the gas diffusion layer coated with glue with the catalyst layer interface of the CCM to obtain a membrane electrode; the binder is one or more of carboxymethyl cellulose, polyacrylic acid and polyethylene oxide. The bonding agents, the preparation methods of the bonding agents and the coating modes are suitable for the interface bonding effect of the GDL and the CCM of the proton exchange membrane fuel cell, the bonding strength of the GDL and the CCM is improved on the premise of not greatly influencing the initial performance of a single cell, the integrity of the MEA is ensured, and the problem of poor bonding effect when the perfluorinated sulfonic acid resin is used as the bonding agent due to poor bending strength of a coiled material diffusion layer can be solved.

Description

Binder for promoting interface binding force of gas diffusion layer and CCM of fuel cell and preparation method thereof
Technical Field
The invention belongs to the field of fuel cells, and mainly relates to a method for bonding GDL and CCM in a membrane electrode preparation process of a proton exchange membrane fuel cell.
Background
The adhesive for fuel cells and membrane electrode assemblies disclosed in patent US8,808,942B 2 is a binder suitable for solid polymer fuel cells, and mainly comprises five components: a basic compound, a cross-linking agent, an adhesion promoter, a reaction promoter for a specific basic compound containing an alkenyl group, a specific cross-linking agent having an Si-H group, the molar ratio of the Si-H group to the alkenyl group being about 1.0 to 5.0.
Patent US0000679a1 discloses a method for bonding MEA and GDL of a fuel cell stack, mainly describing the coating shape and coating position of an adhesive. The coating shape is divided into a dot shape and a long strip shape, taking the MEA with the active region being a rectangle as an example, the dot coating can be coated on four corners or the middle of the four corners and the long edge of the GDL or the long edge with the four corners being the dot shape, the long strip coating can be coated on the adhesive with a certain length and width at the middle section of the four edges of the GDL or coated on the adhesive with a certain width on the whole edges of the four edges of the GDL. The MEA disclosed in this patent consists of a proton exchange membrane, a catalyst layer, a seal border and a GDL, which is overlapped on the seal border so that the applied adhesive is present at the interface of the GDL and the seal border without contacting the catalyst layer.
Patent CN102769141A discloses a method for bonding GDL and CCM together, which mainly comprises spraying perfluorosulfonic acid resin on the surface of the microporous layer of a gas diffusion layer, and then performing thermal flat pressing on GDL and CCM at 140 ℃, so that the resin coated on the surface of the gas diffusion layer and the resin in the catalyst layer are bonded with each other, the bonding force between the gas diffusion layer and the catalyst layer is effectively enhanced, the structural stability of MEA in the using process is improved, and the service life of MEA is prolonged.
The current preparation processes of the MEA can be generally classified into three types according to the production mode of the MEA: the flat pressing, the rolling and the integral forming have high maturity and are widely applied. Gas diffusion layers can be divided into two types: web gas diffusion layers and sheet gas diffusion layers. The coiled material diffusion layer has good flexibility and high stiffness, and different mechanical properties of the two materials lead to different phenomena in the preparation process of the MEA. Taking the hot flat pressing preparation process disclosed in patent CN102769141A as an example: spraying a layer of perfluorinated sulfonic acid resin on the surface of the microporous layer of the GDL sheet, and combining the GDL sheet and the CCM sheet well through hot pressing; the surface of the microporous layer of the GDL is sprayed with the same amount of resin or even more resin, the bonding strength of the GDL and the CCM is not ideal after hot pressing, and the GDL can fall off due to the weak bonding force of the GDL and the CCM in the subsequent storage and galvanic pile assembly processes.
An MPL/CCM interfacial binder provided in patent US8,808,942B 2 is modified to achieve a certain bonding strength by adding a cross-linking agent and an adhesion promoter to a silicon-containing alkenyl compound, and the modified binder is proposed to be coated only at the edge positions of GDL and CCM active regions in order to reduce the influence on the MEA performance. At present, most proton exchange membrane fuel cells at home and abroad adopt a method similar to that in the patent US0000679A1 to lap the GDL on a sealing frame, a layer of adhesive is coated between the frame and the GDL, the sealing frame and the CCM are connected to form the MEA.
Disclosure of Invention
In view of the above technical problems, the present invention provides several binders, namely carboxymethylcellulose (CMC), polyacrylic acid (PAA) and polyethylene oxide (PEO), which can be applied to the GDL/CCM interface.
In proton exchange membrane fuel cells, the GDL/CCM interfacial binder also plays a critical role in cell electrical performance and durability: the key components of the MEA are combined together to form the complete MEA, and the connectivity of the GDL/CCM interface is improved, so that the MEA has better charge transfer performance and water management performance.
PEO has better chemical stability, namely acid resistance and alkali resistance, has no chemical active group in the molecular formula, is difficult to perform other chemical reactions except decomposition under harsh conditions, and can effectively promote the electronic conductivity of the battery.
The CMC binder has a carboxyl functional group structure, carboxyl on the long chain and hydroxyl on the surface of active substance particles or conductive agent particles form an ester bond structure, and various particles in the pole piece are tightly linked together to play a role in binding.
The PAA binder has a carboxyl functional group structure, carboxyl on a long chain can form an ester bond structure with hydroxyl on the surface of active substance particles, various particles in an electrode are tightly linked together to play a role in binding, and the carboxyl on the long chain can also interact with each other to form a hydrogen bond, so that the long chains are mutually crosslinked together to generate stronger binding force.
The technical scheme of the invention is as follows:
a method for the interface bonding of a gas diffusion layer of a fuel cell and a CCM (continuous current module), wherein the gas diffusion layer comprises a substrate layer and a microporous layer attached to one side surface of the substrate, the CCM comprises a proton exchange membrane and catalytic layers distributed on two sides of the proton exchange membrane, and the method comprises the following steps:
firstly, dissolving and diluting a binder by using a solvent to obtain glue, and distributing the glue on the surface of the microporous layer in a spot coating or spraying manner; bonding one surface of the gas diffusion layer coated with glue with the catalyst layer interface of the CCM to obtain a membrane electrode; the binder is one or more of carboxymethyl cellulose, polyacrylic acid and polyethylene oxide.
Preferably, the solvent is deionized water without toxicity and corrosion, and a certain proportion of alcohol may be added to the solvent in consideration of the wettability of the binder on the surface of the hydrophobic MPL, where the alcohol may be anhydrous ethanol, isopropanol, n-propanol, or the like. Water: the mass ratio of the alcohol is usually 1:1 to 9: 1.
Preferably, the mass fraction of the binder is usually 0.5% -20%, and the viscosity of the glue is usually 100-1000 cp.
More preferably, the mass fraction of the binder in the glue is 0.5-10%; the viscosity of the glue is 100-400 cp.
Preferably, the glue is applied in a generally random, dotted pattern (as shown in fig. 2) or uniformly applied to the MPL surface. The coating amount of the glue is usually controlled to be 0.001-0.03 g/cm2。
Preferably, the coating amount of the glue is 0.005-0.01 g/cm2。
The structure of the MEA is shown in fig. 3, a microporous layer 1 is coated on a carbon paper substrate 2 to form a gas diffusion layer, a catalyst is coated on a proton exchange membrane 4 to form a catalyst layer 3, two sides of the edge of the proton exchange membrane are covered with upper frames 5 to perform a sealing function, and the gas diffusion layer is covered on the catalyst layer to form a complete MEA. The assembly formed by coating the catalyst layer on the proton exchange membrane can be called CCM, the CCM and the frame material with the adhesive film are hot-pressed to form a five-in-one structure, the hot-pressing temperature is 90-150 ℃, the glue which is dissolved and diluted by a certain means and provided by the invention is coated on the surfaces of the cathode and anode GDL or the microporous layer of the anode GDL, and then the glue is bonded on the CCM by a certain pressure, so that the complete MEA shown in figure 3 can be formed.
Advantageous effects
1. The invention provides a specific adhesive from the viewpoints of an adhesive mechanism (such as an ester bond structure formed by carboxyl functional groups of a PAA long chain and carbon particles on a GDL/CCM interface, and a hydrogen bond formed by interaction among all carboxyl groups on the long chain, so that long chains are mutually crosslinked together to generate stronger adhesive strength), a crystalline state (such as an amorphous structure of the PAA, and the amorphous structure can be covered on the surface of a material very uniformly like a layer of glue even in a drying process), a solvent (a water-based solvent and an oil-based solvent), chemical stability, electrochemical stability, water absorption, environmental friendliness, adhesive strength and the like, wherein the specific adhesive is provided, and comprises the following components in percentage by weight:
PEO is combined by hydrogen bonds and has a crystal form, has better acid and alkali resistance stability and electrochemical stability, is environment-friendly due to an aqueous solvent, is easy to absorb water generated by the reaction of a catalyst layer of the fuel cell, has higher bonding strength,
PAA is combined by two modes of ester bond and hydrogen bond, has amorphous state, chemical inertness, good electrochemical stability of 0-4.3V, environment-friendly aqueous solvent, high bonding strength, and is easy to absorb water generated by the reaction of a catalyst layer of a fuel cell,
CMC is combined in two modes of ester bond and hydrogen bond, has an amorphous state, is chemically inert, is environment-friendly due to an aqueous solvent, and has higher bonding strength.
2. The invention provides a specific adhesive, and the adhesive is dissolved and diluted by a proper solvent to prepare the adhesive suitable for adhering the GDL and the CCM of the proton exchange membrane fuel cell; the present invention not only proposes several chemicals suitable for GDL bonding, but also explores the methods of dissolution and use of these chemicals and the assessment of the magnitude of the impact on MEA performance. Provides an effective method for bonding the GDL and the CCM in the MEA preparation process.
3. Compared with the prior art, the bonding agents, the preparation methods of the bonding agents and the coating modes are suitable for the interface bonding effect of the GDL and the CCM of the proton exchange membrane fuel cell, the bonding strength of the GDL and the CCM is improved on the premise of not greatly influencing the initial performance of a single cell, the integrity of the MEA is ensured, and the problem of poor bonding effect when the perfluorinated sulfonic acid resin is used as the bonding agent due to poor bending strength of a coiled material diffusion layer can be solved.
Drawings
FIG. 1 is a schematic view of a gas diffusion layer structure;
FIG. 2 is a schematic view of surface gluing of a gas diffusion layer;
FIG. 3 is a schematic view of the MEA construction;
FIG. 4 is an I-V curve of a single cell tested in example 1 and comparative example 1 under the working condition of 70 ℃ and no back pressure;
FIG. 5 shows HFR of single cells tested in example 1 and comparative example 1 under 70 ℃ and no back pressure condition;
FIG. 6 is the I-V curves of single electrodes measured under the working conditions of 80 ℃ and 50KPa back pressure in example 1, example 2 and comparative example 1;
FIG. 7 shows HFRs of single cells measured in example 1, example 2 and comparative example 1 under the conditions of 80 ℃ and 50KPa back pressure.
In fig. 1-3, 1 is a microporous layer of GDL, and 2 is a carbon paper substrate layer of GDL; 3 is a catalyst layer, 4 is a proton exchange membrane, and 5 is a sealed frame; and 6, coating glue dots on the surface of the microporous layer.
Detailed Description
Example 1
(1) Mixing water and anhydrous alcohol according to a mass ratio of 8:2 to obtain a mixed solution, weighing a certain amount of CMC, putting the CMC into the alcohol-water solution, and magnetically stirring for 2-10h to fully dissolve the CMC to form a glue-like substance with a mass fraction of 0.5%, uniform components and a viscosity of 120 cp;
(2) cutting into two pieces of 5 x 5cm with a knife edge die2Covering the GDL on the CCM, and hot-pressing the GDL and the sealing frame at the temperature of about 100 ℃ to melt the glue on the sealing frame and bond the glue and the CCM together. At this time, the GDL can be taken off freely because the surface of the GDL is free from adhesive and the GDL is not adhered to the CCM;
(3) the CMC glue with certain concentration is filled into a spray gun, and the size of the sprayed liquid drop of the glue is controlled by adjusting air pressure, so that the glue can form fine fog shape or slightly larger liquid drop shape;
(4) spraying glue on the surface of the microporous layer of the cathode/anode GDL to form glue dots with a certain size, wherein the spraying quality is about 0.15g, and the coating amount of the glue is 0.006g/cm2；
(5) Attaching the GDL to the CCM before the glue dries, and applying less pressure to bond the GDL and CCM together to form an MEA as shown in figure 3;
(6) the MEA was assembled with a cell jig to form a cell, and a polarization curve test was performed to evaluate the initial electrical properties, and the test results are shown in fig. 4 and 5.
Example 2
(1) Mixing water and anhydrous alcohol at a mass ratio of 9:1 to obtain a mixed solution, weighing a certain amount of CMC, putting the CMC into the alcohol-water solution, and magnetically stirring for 2-10h to fully dissolve the CMC to form a glue-like substance with a mass fraction of 0.5%, uniform components and a viscosity of 120 cp;
(2) cutting into two pieces of 5 x 5cm with a knife edge die2Covering the GDL on the CCM, and hot-pressing the GDL and the sealing frame at the temperature of about 100 ℃ to melt the glue on the sealing frame and bond the glue and the CCM together. At this time, the GDL can be taken off freely because the surface of the GDL is free from adhesive and the GDL is not adhered to the CCM;
(3) the CMC glue with certain concentration is filled into a spray gun, and the size of the sprayed liquid drop of the glue is controlled by adjusting air pressure, so that the glue can form fine fog shape or slightly larger liquid drop shape;
(4) spraying glue on the surface of the microporous layer of the cathode/anode GDL to form glue dots with a certain size, wherein the spraying quality is about 0.11g, and the coating amount of the glue is 0.004g/cm2；
(5) Attaching the GDL to the CCM before the glue dries, and applying less pressure to bond the GDL and CCM together to form an MEA as shown in figure 3;
(6) the MEA was assembled with a cell jig to form a cell, and a polarization curve test was performed to evaluate the initial electrical properties, and the test results are shown in fig. 6 and 7.
Comparative example 1
The GDL which is the same as the model of the embodiment 1 and is not coated with any binder is matched with the CCM which is the same as the model of the embodiment 1 and has a special model, the polarization curve is tested under the same operation condition as the embodiment 1 and the embodiment 2, and the influence of glue with different formulas and different coating amounts on the performance of a single cell is compared.
The glue does not have obvious influence on the electrical property of the single cell on the basis of improving the interface bonding strength of the CCM and the GDL, as shown in figures 4 to 7.
Comparative example 2
(1) Mixing water and alcohol according to the mass ratio of 1:1, weighing a certain amount of perfluorinated sulfonic acid resin, putting the perfluorinated sulfonic acid resin into an alcohol-water solution, and magnetically stirring for 2-10 hours to fully dissolve the perfluorinated sulfonic acid resin to form a solution with the mass fraction of 0.5%;
(2) cutting into two pieces of 5 x 5cm with a knife edge die2GDL of (2);
(3) the perfluorosulfonic acid resin solution with a certain concentration is filled into a spray gun, and the size of the liquid drop sprayed by the glue is controlled by adjusting the air pressure, so that the liquid drop can form a fine mist shape or a slightly larger liquid drop shape;
(4) spraying the above resin solution on the surface of the microporous layer of cathode and anode GDL to form glue dots with certain size, the spraying quality is about 0.25g, and the coating amount is 0.01g/cm2And the coating amount of the dried resin is 0.05mg/cm2；
(5) The GDL was covered on the CCM and hot-pressed at about 120 ℃ to bond the GDL to the CCM by resin.
Example 3
(1) Mixing water and anhydrous alcohol according to a mass ratio of 8:2 to obtain a mixed solution, weighing a certain amount of CMC, putting the CMC into the alcohol-water solution, and magnetically stirring for 2-10h to fully dissolve the CMC to form a glue-like substance with a mass fraction of 0.5%, uniform components and a viscosity of 120 cp;
(2) cutting into two pieces of 5 x 5cm with a knife edge die2GDL of (2);
(3) the CMC glue with certain concentration is filled into a spray gun, and the size of the sprayed liquid drop of the glue is controlled by adjusting air pressure, so that the glue can form fine fog shape or slightly larger liquid drop shape;
(4) spraying glue on the surface of the microporous layer of the cathode/anode GDL to form glue dots with a certain size, wherein the spraying quality is about 0.15g, and the coating amount of the glue is 0.006g/cm2And 0.004g/cm2；
(5) The GDL was attached to the CCM before the glue dried, and a small amount of pressure was applied to bond the GDL and CCM together.
Example 4
(1) Mixing water and anhydrous alcohol according to a mass ratio of 1:1 to obtain a mixed solution, weighing a certain amount of PAA, putting the PAA into the alcohol aqueous solution, and magnetically stirring for 2-10 hours to fully dissolve the PAA to form a colloidal substance with a mass fraction of 10%;
(2) cutting into two pieces of 5 x 5cm with a knife edge die2GDL of (2);
(3) the PAA glue with a certain concentration is filled into a spray gun, and the size of the liquid drop sprayed by the glue is controlled by adjusting the air pressure, so that the PAA glue can form a fine fog shape or a slightly larger liquid drop shape;
(4) spraying glue on the surface of the microporous layer of the cathode/anode GDL to form glue dots with a certain size, wherein the spraying quality is 0.15g and 0.01g, and the coating amount of the glue is 0.006g/cm2And 0.004g/cm2；
(5) The GDL was attached to the CCM before the glue dried, and a small amount of pressure was applied to bond the GDL and CCM together.
The results of peel strength test of GDL and CCM in comparative example 2, example 3 and example 4 are shown in table 1.
Table 1 shows the results of peel strength test of GDL and CCM using PAA, CMC binder and perfluorosulfonic acid resin binder
Figure BDA0002873472160000061
The above results show that the use of CMC and PAA indeed improves the interfacial adhesion strength of CCM to GDL.

Claims (6)

1. A method for the interfacial adhesion of a gas diffusion layer of a fuel cell and a CCM, wherein the gas diffusion layer comprises a substrate layer and a microporous layer attached to one side surface of the substrate, the CCM comprises a proton exchange membrane and catalytic layers distributed on both sides of the proton exchange membrane, and the method comprises the following steps:
firstly, dissolving and diluting a binder by using a solvent to obtain glue, and distributing the glue on the surface of the microporous layer in a spot coating or spraying manner; bonding one surface of the gas diffusion layer coated with glue with the catalyst layer interface of the CCM to obtain a membrane electrode;
the binder is one or more of carboxymethyl cellulose, polyacrylic acid and polyethylene oxide.
2. The method of claim 1, wherein the solvent is deionized water or a mixture of deionized water and an alcohol; the alcohol is absolute ethyl alcohol, isopropanol or n-propanol; the water: the mass ratio of the alcohol is 1: 1-9: 1.
3. The method according to claim 1, wherein the mass fraction of the binder in the glue is 0.5-20%; the viscosity of the glue is 100-1000 cp.
4. The method according to claim 3, wherein the mass fraction of the binder in the glue is 0.5-10%; the viscosity of the glue is 100-400 cp.
5. The method of claim 1, wherein the glue is applied in an amount of 0.001 to 0.03g/cm2。
6. The method according to claim 5, wherein the glue is applied in an amount of 0.005 to 0.01g/cm2。
CN202011643150.6A 2020-12-30 2020-12-30 Binder for promoting interface binding force of gas diffusion layer and CCM of fuel cell and preparation method thereof Pending CN112838222A (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101395745A (en) * 2006-05-23 2009-03-25 丰田自动车株式会社 Fuel cell electrode and method for producing fuel cell electrode, membrane-electrode assembly and method for producing membrane-electrode assembly, and solid polymer fuel cell

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101395745A (en) * 2006-05-23 2009-03-25 丰田自动车株式会社 Fuel cell electrode and method for producing fuel cell electrode, membrane-electrode assembly and method for producing membrane-electrode assembly, and solid polymer fuel cell

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