CN106898782A - A kind of preparation of fuel cell electrode and the device of electrode is prepared using the method - Google Patents
A kind of preparation of fuel cell electrode and the device of electrode is prepared using the method Download PDFInfo
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- CN106898782A CN106898782A CN201510962842.XA CN201510962842A CN106898782A CN 106898782 A CN106898782 A CN 106898782A CN 201510962842 A CN201510962842 A CN 201510962842A CN 106898782 A CN106898782 A CN 106898782A
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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
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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
- H01M4/8825—Methods for deposition of the catalytic active composition
- H01M4/8828—Coating with slurry or ink
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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
- H01M4/8878—Treatment steps after deposition of the catalytic active composition or after shaping of the electrode being free-standing body
-
- 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
A kind of preparation method of fuel cell electrode, including 1) magnetic catalyst pretreatment；2) catalyst slurry is prepared；3) slurries are coated under magnetic field environment；4) pole drying and 5) electrode magnetizes.Described externally-applied magnetic field be magnetostatic field, impulse magnetic field in one or more.Preparing electrode using the method for the invention has the advantages that ordering degree is high, electrode mass transport losses are small, performance is good, while the method for the invention simply, is easily realized.
Description
Technical field
The invention belongs to field of fuel cell technology, and in particular to the preparation method and preparation facilities of a kind of fuel cell electrode.
Background technology
Today's society increasingly increases the demand of the energy, and fossil energy reserves are limited and environmental pollution is heavier in addition, develops the energy conversion system of high-efficiency cleaning into the task of top priority.Fuel cell is a kind of electro-chemical conversion devices that fuel chemical energy is directly converted into electric energy, is one of 21 century most competitive high-efficiency cleaning generation mode.It has that theoretical specific energy is high, system architecture is simple, efficiency high, small noise the features such as, have broad application prospects in many power fields.
Membrane electrode is fuel cell " heart ", is the place that electrochemical reaction occurs.The preparation technology of the height of heel electrode of its performance is closely related.For magnetic catalyst, then it is expected to so that magnetic catalyst granule magnetic pole has a distribution of orientations in electrode magnetic field is applied during preparing electrode.The method one can make Catalytic Layer central hole structure more orderly, two come the gradient magnetic that is formed so that paramagnetism O2Attracted and moved to the increased direction of magnetic field intensity, and the N of diamagnetism2Move (O in the direction for then being reduced to magnetic field intensity2Magnetic field force induced in gradient magnetic institute is approximately N2200 times), so as to reduce the mass transport losses of oxygen, lift battery performance.
For the catalyst slurry coating problem containing magnetic material, the present invention, by additional high-intensity magnetic field, is realized magnetic catalyst and is distributed in order in Catalytic Layer using the characteristic of magnetic material orientations under magnetic fields.
The content of the invention
For problem above, it is an object of the invention to provide the preparation method and preparation facilities of a kind of electrode.
To achieve the above object, the technical solution adopted by the present invention is：
A kind of electrode preparation method, its step includes：1) magnetic catalyst pretreatment, 2) catalyst slurry prepares, and 3) slurries, 4 are coated under magnetic field environment) pole drying, 5) electrode magnetizes；
Described catalyst preheating step includes：A. magnetic catalyst granule is dried, b. mixes the magnetic catalyst after drying with electrolyte or ionomer solution, and c. inserts in vacuum environment mixed slurries, d. filtering slurries simultaneously dry catalyst.
Described catalyst has magnetic, can be that catalyst activity material is magnetic or catalyst carrier is magnetic, also or the two is all magnetic；Magnetic catalyst activity material is PtCo, FexOy、CoxOy、NixOy, one or more in FeCo, NiCo, FeNC, CoNC, but be not limited to listed above；Magnetic catalyst carrier is rare earth permanent magnet, metal permanent magnetism, ferrite permanent-magnet materials.
Described electrolyte or ionomer is consistent with the ionic conductivity of the electrolyte in applied fuel cell, i.e., when described catalyst is applied to acidic fuel cell, the electrolyte or ionomer energy proton conducting；When the catalyst is applied to alkaline fuel cell, the electrolyte or ionomer can conduct hydroxide ion.
The electrolyte or ionomer are acted on catalyst Non-toxic；Described vacuum environment refers to that absolute pressure is less than 20kPa.
It is that the pretreated same binding agent of catalyst (or ionomer), solvent etc. is well mixed that described catalyst slurry is prepared.
Under described magnetic field environment coat slurries refer to coating slurries during externally-applied magnetic field so that magnetic-particle magnetic domain be orientated；Described slurries coating refers to that the catalyst slurry that will be prepared is coated on base material, coating method can be scratch, brush, spraying, silk-screen printing, one or more in slit extruding.
Described externally-applied magnetic field can be magnetostatic field, or impulse magnetic field, can also be that the two is combined；The magnetic field intensity in the magnetic field is 0.1-100T.
Described pole drying refers to that the electrode that will be coated on the base layer is dried to remove solvent.
Described magnetizing refers to place dried electrode to be magnetized with magnet charger, and magnetizing direction is with to apply magnetic direction during coating slurries under magnetic field environment consistent.
A kind of fuel cell electrode preparation facilities, including catalyst preconditioning unit, River Bank Stability unit, coating unit, drying unit and the unit that magnetizes.
Catalyst preconditioning unit, for pretreatment catalyst, is capable of achieving following function：1) catalyst granules drying, 2) the same electrolyte of catalyst (or ionomer solution) mixes, and 3) mixed slurries are inserted in vacuum environment, and 4) filtering slurries and dry catalyst；
River Bank Stability unit, for preparing catalyst slurry and being mixed uniform；
Coating unit, for catalyst slurry to be coated on into basalis, can simultaneously apply magnetic field in coating；
Drying unit, for the electrode that drying has been coated；
Magnetize unit, is magnetized with by electrode for applying pulsed magnetic field.
The preparation method and device of electrode of the present invention, have the following advantages that：
1. the ordering degree for preparing electrode is high
2. the mass transport losses of electrode are small, performance is good.
3. method simply, is easily realized.
Brief description of the drawings
Fig. 1 is preparation technology block diagram of the invention；
Fig. 2 is catalyst preheating step block diagram of the present invention；
Fig. 3 is electrode coated schematic diagram under magnetic field environment of the present invention, wherein 301 and 302 is magnet, 303 is coated substrate material, and 304 is magnetic field line；
Fig. 4 is to prepare electrode and ordinary electrode performance comparison figure using the inventive method.
Specific embodiment
The present invention is explained in detail with reference to embodiment.Certain present invention is not limited in following specific embodiments.
Embodiment 1：
Catalyst is pre-processed：Used magnetic catalyst is the PtCo/C of TKK companies production.Pre-treatment step is：1) it is put into 120 DEG C of vacuum drying oven and dries 2h, 2) in N2In atmosphere by it with mass concentration 5%Nafion solution, (Nafion, PtCo/C, the mass ratio of ethanol are 1 to ethanol：4：20) it is well mixed, 3) well mixed slurries are inserted into vacuum drying chamber, in absolute pressure 10kPa, temperature is to place 4h, 4 under room temperature condition) take out slurries and filter and dry；
Catalyst slurry is prepared：It is that 5% Nafion solution and isopropanol are well mixed by the dried PtCo/C homogenous quantities concentration of upper cloth；Wherein Nafion, PtCo/C, the mass ratio of isopropanol are 1：4：20.
Coated under magnetic field environment：Externally-applied magnetic field and basalis are placed as shown in figure 3, basalis is TGP-060, and size is coated with 0.6mg/cm thereon for 20*20mm2Carbon dust, PTFE mixtures, wherein the mass fraction of PTFE be 30%.Using two pieces of NdFeB permanent magnets of 100*100*10mm as external magnetic field source, using the mode of brushing by catalyst slurry brush on basalis.
Pole drying：Electrode is placed in and fills N260 DEG C dry 2h in baking oven
Electrode magnetizes：Electrode after drying is placed on the magnetoelectricity magnet charger of power field and is magnetized.
Embodiment 2：
Catalyst is pre-processed：Used magnetic catalyst is the PtCo/C of TKK companies production.Pre-treatment step is：1) it is put into 120 DEG C of vacuum drying oven and dries 2h, 2) in N2Mass concentration 5%H is immersed in atmosphere3PO4In, 3) slurries are inserted into vacuum drying chamber, in absolute pressure 5kPa, temperature is to place 2h, 4 under room temperature condition) take out slurries and filter and dry.
Catalyst slurry is prepared：PBI solution (solvent is DMAc) that the dried PtCo/C homogenous quantities concentration of upper cloth is 2% and 1%PVDF solution (solvent is DMAc) is well mixed；Wherein PtCoC, PBI, PVDF mass ratio are 158：9：2.
Coated under magnetic field environment：Externally-applied magnetic field and basalis are placed as shown in figure 3, basalis is TGP-060, and size is coated with 0.8mg/cm thereon for 20*20mm2Carbon dust, PTFE mixtures, wherein the mass fraction of PTFE be 25%.Using two pieces of NdFeB permanent magnets of 100*100*10mm as external magnetic field source, using the mode of brushing by catalyst slurry brush on basalis.
Pole drying：Electrode is placed in and is filled 130 DEG C of vacuum drying chamber and is dried 4h.
Electrode magnetizes：Electrode after drying is placed on the magnetoelectricity magnet charger of power field and is magnetized.
Comparative example：
Catalyst is pre-processed：Used magnetic catalyst is the PtCo/C of TKK companies production.Pre-treatment step is：1) it is put into 120 DEG C of vacuum drying oven and dries 2h, 2) in N2It is well mixed with mass concentration 5%Nafion solution, ethanol in atmosphere (Nafion, PtCo/C, ethanol mass ratio be 1：4：20) well mixed slurries, 3) are inserted into vacuum drying chamber, in absolute pressure 10kPa, temperature is to place 4h, 4 under room temperature condition) take out slurries and filter and dry
Catalyst slurry is prepared：It is that 5% Nafion solution and isopropanol are well mixed by the dried PtCo/C homogenous quantities concentration of upper cloth；Wherein Nafion, PtCo/C, the mass ratio of isopropanol are 1：4：20.
Catalyst is coated：Basalis is TGP-060, and size is coated with 0.6mg/cm thereon for 20*20mm2Carbon dust, PTFE mixtures, wherein the mass fraction of PTFE be 30%.Using the mode of brushing by catalyst slurry brush on basalis.
Pole drying：Electrode is placed in and fills N260 DEG C dry 2h in baking oven；
Fig. 4 test results in half-cell of the electrode prepared by embodiment 1 and comparative example, electrolyte is 0.5MH2SO4, limiting current density electrode coated under magnetic field environment is almost 2 times of comparative example as seen from the figure, thus can reflect it is electrode coated under magnetic field environment in oxygen transfer resistance be greatly reduced.
Claims (10)
1. a kind of preparation method of fuel cell electrode, it is characterised in that：Comprise the following steps,
1) magnetic catalyst pretreatment；2) catalyst slurry is prepared；3) slurries are coated under magnetic field environment；4)
Pole drying；5) electrode magnetizes.
2. according to the preparation method described in claim 1, it is characterised in that：It is outer that the magnetic field environment is used
Plus magnetic field be magnetostatic field, impulse magnetic field in one or more；Magnetic field sense in wherein described magnetic field
It is 0.1-100T to answer intensity.
3. according to the preparation method described in claim 1, it is characterised in that：Described pole drying refer to by
Coating electrode on the base layer dries to remove solvent.
4. according to the preparation method described in claim 1 or 2, it is characterised in that：It is described magnetize refer to by
Dried electrode is positioned on magnet charger and magnetizes, and is applied when coating slurries under magnetizing direction and magnetic field environment
Magnetic direction is consistent.
5. according to the preparation method described in claim 1, it is characterised in that：
Described catalyst preheating step includes：1) magnetic catalyst granule is dried, 2) by after drying
Magnetic catalyst mix with electrolyte or ionomer solution, 3) mixed slurries are inserted in vacuum environment,
4) slurries are filtered and catalyst is dried.
6. according to the preparation method described in claim 1 or 5, it is characterised in that：
The magnetic catalyst refers to that catalyst has magnetic, and loaded catalyst can be catalyst activity thing
Matter is magnetic or catalyst carrier is magnetic, also or the two is all magnetic；Unsupported catalyst is to urge
Agent active material is magnetic；
Magnetic catalyst activity material is PtCo, FexOy、CoxOy、NixOy、FeCo、NiCo、FeNC、
One or more in CoNC；
Magnetic catalyst carrier be rare earth permanent magnet, metal permanent magnetism, ferrite permanent-magnet materials in one kind or
It is two or more.
7. according to the preparation method described in claim 5, it is characterised in that：
Described electrolyte or ionomer is consistent with the ionic conductivity of the electrolyte in applied fuel cell,
When i.e. described catalyst is applied to acidic fuel cell, the electrolyte or ionomer energy proton conducting；It is described
When catalyst is applied to alkaline fuel cell, the electrolyte or ionomer can conduct hydroxide ion.
8. according to the preparation method described in claim 5, it is characterised in that：
Described vacuum environment refers to that absolute pressure is less than 20kPa.
9. according to the preparation method described in claim 1, it is characterised in that：
It is that pretreated catalyst is mixed with binding agent or ionomer, solvent that described catalyst slurry is prepared
Close uniform；Described slurries coating refers to that the catalyst slurry that will be prepared is coated on base material, coating
Mode can be scratch, brush, spraying, silk-screen printing or slit extruding in one or two or more kinds.
10. a kind of any methods describeds of use claim 1-9 prepare the device of fuel cell electrode, and it is special
Levy and be：Including catalyst preconditioning unit, River Bank Stability unit, coating unit, drying unit and magnetize
Unit；
The catalyst preconditioning unit, for pretreatment catalyst, is capable of achieving following function：1) catalyst
Particle is dried, and 2) the same electrolyte of catalyst (or ionomer solution) mixing, 3) mixed slurries
Insert in vacuum environment, 4) filter slurries and dry catalyst；
The River Bank Stability unit, for preparing catalyst slurry and being mixed uniform；
The coating unit, for catalyst slurry to be coated on into basalis, can simultaneously apply magnetic field in coating；
The drying unit, for the electrode that drying has been coated；
The unit that magnetizes, magnetizes for applying pulsed magnetic field with by electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510962842.XA CN106898782A (en) | 2015-12-21 | 2015-12-21 | A kind of preparation of fuel cell electrode and the device of electrode is prepared using the method |
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| CN201510962842.XA CN106898782A (en) | 2015-12-21 | 2015-12-21 | A kind of preparation of fuel cell electrode and the device of electrode is prepared using the method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108741228A (en) * | 2018-04-04 | 2018-11-06 | 赫斯提亚深圳生物科技有限公司 | Electrode assembly, its manufacturing method and apparatus for aerosol creation |
| CN111313033A (en) * | 2018-12-12 | 2020-06-19 | 中国科学院大连化学物理研究所 | Preparation and load capacity control method of fuel cell gas diffusion electrode catalyst layer |
| CN111740119A (en) * | 2020-06-30 | 2020-10-02 | 电子科技大学 | Preparation method of fuel cell membrane electrode catalyst layer |
| CN114759200A (en) * | 2022-05-31 | 2022-07-15 | 中国矿业大学 | Preparation method of porous electrode |
| CN115020721A (en) * | 2022-07-12 | 2022-09-06 | 一汽解放汽车有限公司 | Membrane electrode catalytic slurry, membrane electrode, preparation method of membrane electrode and fuel cell |
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| CN1191631A (en) * | 1995-06-07 | 1998-08-26 | 衣阿华大学研究基金会 | Gradient interface composites and methods therefor |
| JP2008192539A (en) * | 2007-02-07 | 2008-08-21 | Toppan Printing Co Ltd | Electrode catalyst layer and its manufacturing method, mea (electrolyte membrane electrode assembly) made by using above, as well as solid polymer fuel cell |
| CN101682034A (en) * | 2007-05-18 | 2010-03-24 | 丰田自动车株式会社 | Electrode catalyst for alkaline fuel cell, alkaline fuel cell, and formation method for alkaline fuel cell electrode catalyst |
| CN102769140A (en) * | 2012-07-30 | 2012-11-07 | 大连交通大学 | Method for manufacturing sequential catalyst layer of electrode of proton exchange membrane fuel cell |
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Patent Citations (4)
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| CN1191631A (en) * | 1995-06-07 | 1998-08-26 | 衣阿华大学研究基金会 | Gradient interface composites and methods therefor |
| JP2008192539A (en) * | 2007-02-07 | 2008-08-21 | Toppan Printing Co Ltd | Electrode catalyst layer and its manufacturing method, mea (electrolyte membrane electrode assembly) made by using above, as well as solid polymer fuel cell |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108741228A (en) * | 2018-04-04 | 2018-11-06 | 赫斯提亚深圳生物科技有限公司 | Electrode assembly, its manufacturing method and apparatus for aerosol creation |
| CN111313033A (en) * | 2018-12-12 | 2020-06-19 | 中国科学院大连化学物理研究所 | Preparation and load capacity control method of fuel cell gas diffusion electrode catalyst layer |
| CN111313033B (en) * | 2018-12-12 | 2021-07-27 | 中国科学院大连化学物理研究所 | Preparation and load capacity control method of fuel cell gas diffusion electrode catalyst layer |
| CN111740119A (en) * | 2020-06-30 | 2020-10-02 | 电子科技大学 | Preparation method of fuel cell membrane electrode catalyst layer |
| CN111740119B (en) * | 2020-06-30 | 2021-07-06 | 电子科技大学 | Preparation method of fuel cell membrane electrode catalyst layer |
| CN114759200A (en) * | 2022-05-31 | 2022-07-15 | 中国矿业大学 | Preparation method of porous electrode |
| CN115020721A (en) * | 2022-07-12 | 2022-09-06 | 一汽解放汽车有限公司 | Membrane electrode catalytic slurry, membrane electrode, preparation method of membrane electrode and fuel cell |
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Application publication date: 20170627 |