CN101615681A - The preparation method of direct methanol fuel cell multilayer alcohol-resistant membrane electrode - Google Patents
The preparation method of direct methanol fuel cell multilayer alcohol-resistant membrane electrode Download PDFInfo
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- CN101615681A CN101615681A CN200910183263A CN200910183263A CN101615681A CN 101615681 A CN101615681 A CN 101615681A CN 200910183263 A CN200910183263 A CN 200910183263A CN 200910183263 A CN200910183263 A CN 200910183263A CN 101615681 A CN101615681 A CN 101615681A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- 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
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The present invention relates to a kind of preparation method of direct methanol fuel cell multilayer alcohol-resistant membrane electrode, may further comprise the steps: (1) proton exchange membrane preliminary treatment: in hydrogenperoxide steam generator, dilute sulfuric acid and deionized water, handle proton exchange membrane successively, to remove the impurity on the striping; (2) preparation diffusion layer: will be prepared on the charcoal cloth with the rich empty carbon dust layering that the water-repelling agent modulation is crossed, make diffusion layer with controlled micro channel structure; (3) with cathode and anode catalyst and solvent, binding agent, ultrasonic concussion is modulated into ink shape mixture, directly is prepared into the good proton exchange membrane surface of preliminary treatment, and dry; (4) anode diffusion layer, the moon/anode-side all having been coated the proton exchange membrane of catalyst and the cathode diffusion layer mode by hot pressing is integrated.The present invention can improve the utilance of catalyst, and the anode and cathode catalyst loading is reduced to 1-2mg/cm
2, realizing the management of membrane electrode internal water, can improve more than the methanol fuel utilance to 70%.
Description
Technical field
The present invention relates to a kind of membrane electrode preparation method that is used for direct methanol fuel cell, specifically, relate to a kind of preparation method of multilayer alcohol-resistant membrane electrode, belong to fuel cell field.
Background technology
Direct methanol fuel cell (DMFC) is the device that the chemical energy in methanol solution or pure methyl alcohol and the oxygen is converted into electric energy by electrochemical reaction, with respect to other battery, its have energy density height, fuel source extensively, need not advantages such as charging, low pollution, can be used as portable electrical power applications in fields such as electric vehicle, notebooks, but because its research and development time is shorter, ripe not enough on many technical elements, influence it and moved towards the process of commercialization.
Membrane electrode assembly (MEA) is the core component of direct methanol fuel cell (DMFC), and the research of MEA at present be the more important thing is and improved stability and useful life except paying attention to performance, reduces cost.The DuPont company of the U.S., Fuel Cells company, Gore Fuel Cells company, E-Tek company, huge fund research and development MEA technology of preparing is successively thrown by Britain Johnson Matthey company etc., DuPont company has developed the preparation technology of self sealss MEA, reliability and the useful life of MEA have been improved, but its technology is in highly confidential state, E-TEK company is distributed as research emphasis with parent/hydrophobicity in the gas-diffusion electrode and bore diameter gradient, has developed a series of well behaved gas-diffusion electrodes.But the preparation of these products can't realize mass, and price is still higher.
Summary of the invention
In order to overcome the problems referred to above that prior art exists, the invention provides a kind of preparation method of new direct methanol fuel cell multilayer alcohol-resistant membrane electrode, be used to prepare the direct methanol fuel cell multilayer alcohol-resistant membrane electrode.
The preparation method of direct methanol fuel cell multilayer alcohol-resistant membrane electrode of the present invention may further comprise the steps:
(1) proton exchange membrane preliminary treatment: in hydrogenperoxide steam generator, dilute sulfuric acid and deionized water, handle proton exchange membrane successively, to remove the impurity on the striping;
(2) preparation diffusion layer: will be prepared on the charcoal cloth with the rich empty carbon dust layering that the water-repelling agent modulation is crossed, make diffusion layer with controlled micro channel structure;
(3) with cathode and anode catalyst, solvent and binding agent, ultrasonic concussion is modulated into ink shape mixture, directly is prepared into the good proton exchange membrane surface of preliminary treatment, and dry;
(4) anode diffusion layer, the moon/anode-side all having been coated the proton exchange membrane of catalyst and the cathode diffusion layer mode by hot pressing is integrated.
In (2) step, in the preparation diffusion layer process, adopt method for printing screen or flat brush coating method to be prepared on the charcoal cloth with the rich empty carbon dust layering that the water-repelling agent modulation is crossed.
In (3) step, adopt ultrasonic spraying method or brushing method that the ink shape mixture of making directly is prepared into the good proton exchange membrane surface of preliminary treatment.
The empty carbon dust of said richness is an acetylene black, said water-repelling agent is a polytetrafluoroethylene (PTFE), said proton exchange membrane is perfluorinated sulfonic resin film (a Nafion film), described cathod catalyst is Pt/C, anode catalyst is Pt-Ru/C, said solvent is selected from water, ethanol, ethylene glycol, isopropyl alcohol or glycerol, and said binding agent is parent/hydrophobicity agent.
Said parent/hydrophobicity agent is Nafion/PTFE.
The preparation method of direct methanol fuel cell multilayer alcohol-resistant membrane electrode of the present invention has following technique effect:
(1) adopt ultrasonic spraying or the layering of brushing technology that catalyst directly is prepared into amberplex (as the Nafion film) surface, the Catalytic Layer of different levels is passed through parent/hydrophobicity agent (as Nafion or PTEE) as bonding agent and its content of modulation, realize that Catalytic Layer is by parent/hydrophobic Gradient distribution, optimize the mass transfer and the stereochemical structure of Catalytic Layer, under equal output performance situation, improve the utilance of catalyst, thereby the anode and cathode catalyst loading is reduced 1-2mg/cm
2, be lower than present commercial 4mg/cm
2Level.
(2) adopt silk screen printing or the dull and stereotyped technology of brushing to be prepared on carbon paper or the carbon cloth with rich hole carbon dust (as the acetylene black) layering that water-repelling agent (as PTEE) modulation is crossed, make diffusion layer with controlled micro channel structure, control cathode generates the capillary back pressure of water, thereby the water section that negative electrode is generated returns anode, realize the management of MEA internal water, can improve more than the methanol fuel utilance to 70%, and entire electrode adopts spraying coating process, realize the prepared in batches of membrane electrode assembly easily.
Embodiment
The present invention is further illustrated below in conjunction with embodiment, but the scope of protection of present invention is not limited to the scope that embodiment represents.
Embodiment 1
In the present embodiment, the preparation method of direct methanol fuel cell multilayer alcohol-resistant membrane electrode may further comprise the steps:
(1) proton exchange membrane preliminary treatment: in hydrogenperoxide steam generator, dilute sulfuric acid and deionized water, handle proton exchange membrane perfluorinated sulfonic resin film (Nafion film) successively, to remove the impurity on the striping;
(2) preparation diffusion layer: will be prepared on the charcoal cloth with the acetylene black layering that the polytetrafluoroethylene (PTFE) modulation is crossed by method for printing screen, make diffusion layer with controlled micro channel structure;
(3) adopt ultrasonic spraying method with cathod catalyst Pt/C, anode catalyst Pt-Ru/C, water and Nafion/PTFE, ultrasonic concussion is modulated into ink shape mixture, directly is prepared into the good perfluorinated sulfonic resin film of preliminary treatment (Nafion film) surface, and dry;
(4) anode diffusion layer, the moon/anode-side have all been coated the Nafion film of catalyst and the cathode diffusion layer mode by hot pressing and be integrated, promptly made the finished product multilayer alcohol-resistant membrane electrode.
Embodiment 2
In the present embodiment, the preparation method of direct methanol fuel cell multilayer alcohol-resistant membrane electrode may further comprise the steps:
(1) proton exchange membrane preliminary treatment: in hydrogenperoxide steam generator, dilute sulfuric acid and deionized water, handle proton exchange membrane perfluorinated sulfonic resin film (Nafion film) successively, to remove the impurity on the striping;
(2) preparation diffusion layer: will be prepared on the charcoal cloth with the acetylene black layering that the polytetrafluoroethylene (PTFE) modulation is crossed by the flat brush coating method, make diffusion layer with controlled micro channel structure;
(3) adopt brushing method with cathod catalyst Pt/C, anode catalyst Pt-Ru/C, ethanol and Nafion/PTFE, ultrasonic concussion is modulated into ink shape mixture, directly is prepared into the good perfluorinated sulfonic resin film of preliminary treatment (Nafion film) surface, and dry;
(4) anode diffusion layer, the moon/anode-side have all been coated the Nafion film of catalyst and the cathode diffusion layer mode by hot pressing and be integrated, promptly made the finished product multilayer alcohol-resistant membrane electrode.
Embodiment 3
In the present embodiment, the preparation method of direct methanol fuel cell multilayer alcohol-resistant membrane electrode may further comprise the steps:
(1) proton exchange membrane preliminary treatment: in hydrogenperoxide steam generator, dilute sulfuric acid and deionized water, handle proton exchange membrane perfluorinated sulfonic resin film (Nafion film) successively, to remove the impurity on the striping;
(2) preparation diffusion layer: will be prepared on the charcoal cloth with the acetylene black layering that the polytetrafluoroethylene (PTFE) modulation is crossed by the flat brush coating method, make diffusion layer with controlled micro channel structure;
(3) adopt ultrasonic spraying method with cathod catalyst Pt/C, anode catalyst Pt-Ru/C, ethylene glycol and Nafion/PTFE, ultrasonic concussion, be modulated into ink shape mixture, directly be prepared into the good perfluorinated sulfonic resin film of preliminary treatment (Nafion film) surface, and dry;
(4) anode diffusion layer, the moon/anode-side have all been coated the Nafion film of catalyst and the cathode diffusion layer mode by hot pressing and be integrated, promptly made the finished product multilayer alcohol-resistant membrane electrode.
Embodiment 4
In the present embodiment, the preparation method of direct methanol fuel cell multilayer alcohol-resistant membrane electrode may further comprise the steps:
(1) proton exchange membrane preliminary treatment: in hydrogenperoxide steam generator, dilute sulfuric acid and deionized water, handle proton exchange membrane perfluorinated sulfonic resin film (Nafion film) successively, to remove the impurity on the striping;
(2) preparation diffusion layer: will be prepared on the charcoal cloth with the acetylene black layering that the polytetrafluoroethylene (PTFE) modulation is crossed by method for printing screen, make diffusion layer with controlled micro channel structure;
(3) adopt brushing method with cathod catalyst Pt/C, anode catalyst Pt-Ru/C, isopropyl alcohol and Nafion/PTFE, ultrasonic concussion is modulated into ink shape mixture, directly is prepared into the good perfluorinated sulfonic resin film of preliminary treatment (Nafion film) surface, and dry;
(4) anode diffusion layer, the moon/anode-side have all been coated the Nafion film of catalyst and the cathode diffusion layer mode by hot pressing and be integrated, promptly made the finished product multilayer alcohol-resistant membrane electrode.
Claims (5)
1, the preparation method of direct methanol fuel cell multilayer alcohol-resistant membrane electrode is characterized in that: may further comprise the steps:
(1) proton exchange membrane preliminary treatment: in hydrogenperoxide steam generator, dilute sulfuric acid and deionized water, handle proton exchange membrane successively, to remove the impurity on the striping;
(2) preparation diffusion layer: will be prepared on the charcoal cloth with the rich empty carbon dust layering that the water-repelling agent modulation is crossed, make diffusion layer with controlled micro channel structure;
(3) with cathode and anode catalyst, solvent and binding agent, ultrasonic concussion is modulated into ink shape mixture, directly is prepared into the good proton exchange membrane surface of preliminary treatment, and dry;
(4) anode diffusion layer, the moon/anode-side all having been coated the proton exchange membrane of catalyst and the cathode diffusion layer mode by hot pressing is integrated.
2, the preparation method of direct methanol fuel cell multilayer alcohol-resistant membrane electrode according to claim 1, it is characterized in that, in (2) step, in the preparation diffusion layer process, adopt method for printing screen or flat brush coating method to be prepared on the charcoal cloth with the rich empty carbon dust layering that the water-repelling agent modulation is crossed.
3, the preparation method of direct methanol fuel cell multilayer alcohol-resistant membrane electrode according to claim 1, it is characterized in that, in (3) step, adopt ultrasonic spraying method or brushing method that the ink shape mixture of making directly is prepared into the good proton exchange membrane surface of preliminary treatment.
4, according to the preparation method of claim 1 or 2 or 3 described direct methanol fuel cell multilayer alcohol-resistant membrane electrodes, it is characterized in that, the empty carbon dust of said richness is an acetylene black, said water-repelling agent is a polytetrafluoroethylene (PTFE), said proton exchange membrane is perfluorinated sulfonic resin film (a Nafion film), and described cathod catalyst is Pt/C, and anode catalyst is Pt-Ru/C, said solvent is selected from water, ethanol, ethylene glycol, isopropyl alcohol or glycerol, and said binding agent is parent/hydrophobicity agent.
5, the preparation method of direct methanol fuel cell multilayer alcohol-resistant membrane electrode according to claim 4 is characterized in that, said parent/hydrophobicity agent is Nafion/PTFE.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111682240A (en) * | 2020-06-19 | 2020-09-18 | 陕西科技大学 | Passive direct methanol fuel cell with fuel cavity and assembling method thereof |
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2009
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111682240A (en) * | 2020-06-19 | 2020-09-18 | 陕西科技大学 | Passive direct methanol fuel cell with fuel cavity and assembling method thereof |
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