CN102769140A - Method for manufacturing sequential catalyst layer of electrode of proton exchange membrane fuel cell - Google Patents
Method for manufacturing sequential catalyst layer of electrode of proton exchange membrane fuel cell Download PDFInfo
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- CN102769140A CN102769140A CN2012102691607A CN201210269160A CN102769140A CN 102769140 A CN102769140 A CN 102769140A CN 2012102691607 A CN2012102691607 A CN 2012102691607A CN 201210269160 A CN201210269160 A CN 201210269160A CN 102769140 A CN102769140 A CN 102769140A
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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 invention provides a method for manufacturing a sequential catalyst layer of an electrode of a proton exchange membrane fuel cell (PEMFC), The method comprsies the following steps: preparing, coating and baking catalyst slurry, wherein the coating of the catalyst slurry is carried out under the condition of an applied magnetic field, that is, the catalyst slurry is coated on a diffusion layer or electrolyte membrane placed on a magnet; and drying at room temperature, and then separating the magnet from the diffusion layer or electrolyte membrane with the coated catalyst slurry. The method has the beneficial effects: the utilization rate of a catalyst in the sequential catalyst layer is almost 100%, and transmissions of protons, electrons and reaction gases are performed at the shortest distance nearly, so that the performances of the catalyst layer is greatly improved; vertical pores of the catalyst layer with a sequential nanostructure are used for accelerating the speed of oxygen transmission; platinum particles are arranged on an interface between an electronic conductor and a proton conductor, so that platinum catalysts most are effectively utilized; and the catalyst layer with the order nanostructure can form super hydrophobic to promote much water to be removed out of the catalyst layer, so that the speed of mass transmission is increased.
Description
Technical field
The invention belongs to the Proton Exchange Membrane Fuel Cells field, relate in particular to proton exchange membrane fuel cell electrode Catalytic Layer preparation method.
Background technology
Proton Exchange Membrane Fuel Cells directly is converted into electric energy to the chemical energy that is stored in fuel and the oxidant; Its core component is by anode, negative electrode and the membrane electrode assembly that constitutes of the dielectric film wherein; Wherein electrode (negative electrode and anode) constitutes by diffusion layer and Catalytic Layer; Diffusion layer rises and supports Catalytic Layer and then be the place of electrochemical reaction for reaction provides effects such as passage, and collected current, Catalytic Layer.Catalytic Layer is the key factor of decision proton exchange film fuel battery performance and cost, and traditional Catalytic Layer is mainly mixed by components such as carbon supported catalyst and electrolyte at random.The deficiency of conventional art is: can't guarantee that each component evenly mixes, many catalyst are wasted because of not obtaining proton, electronics and reacting gas simultaneously; Simultaneously, be difficult to coordinate the competitiveness transmission of proton, electronics and reacting gas.For overcoming the deficiency of conventional art, a kind of Catalytic Layer of novel ordered structure has been proposed in the prior art, electronic conductor wherein is for being dispersed with the ordered nano carbon array of Pt particle perpendicular to electrode surface, and electrolyte then covers its surface.The ordered structure Catalytic Layer preparation method's of prior art deficiency is preparation method's more complicated.
Summary of the invention
The purpose of this invention is to provide the orderly Catalytic Layer preparation method of a kind of easy proton exchange membrane fuel cell electrode.
Technical scheme of the present invention is: the orderly Catalytic Layer preparation method of a kind of proton exchange membrane fuel cell electrode; Comprise that catalyst pulp preparation, catalyst pulp apply and oven dry; Said catalyst pulp preparation comprises: the Nafion solution of PtCo/C or PtFe/C or PtNi/C catalyst and 5% is mixed for the 3:1 mass ratio by catalyst: Nafion (dry weight); And with isopropanol 10-50 doubly, form black ink sap-shape slurry; Said oven dry is to dry 30min down at 80-100 ℃; It is characterized in that it is in the coating that adds under the magnetic field condition that said catalyst pulp applies; Coating under the said externally-applied magnetic field condition is coated in catalyst pulp on the diffusion layer or dielectric film that is placed on the magnet; After room temperature is dried, again magnet is withdrawn diffusion layer or the dielectric film that has applied catalyst pulp.
The orderly Catalytic Layer preparation method of a kind of proton exchange membrane fuel cell electrode according to the invention is characterized in that said magnet is permanent magnet or electromagnet, and magnet strength is 0.2-3T.
The orderly Catalytic Layer preparation method of a kind of proton exchange membrane fuel cell electrode according to the invention is characterized in that the said catalyst loading that is coated in catalyst pulp on diffusion layer or the dielectric film is 0.2-0.4mg/cm
2
The orderly Catalytic Layer preparation method of a kind of proton exchange membrane fuel cell electrode according to the invention is characterized in that said catalyst pulp painting method is spraying.
Principle of the present invention is: utilize charcoal to carry platinum cobalt (PtCo/C), charcoal and carry platinum iron (PtFe/C) and charcoal and carry the characteristics that cobalt, iron and nickel in the platinum nickel (PtNi/C) has magnetic; Make catalyst granules have magnetic; Catalyst granules will align along magnetic direction under the magnetic field force effect of externally-applied magnetic field, form the orderly Catalytic Layer of vertical proliferation layer or film surface direction.
The invention has the beneficial effects as follows:
1, in order the catalyst utilization in the Catalytic Layer is near 100%, and proton, electronics and reacting gas transmission almost carry out with the shortest distance, improved the Catalytic Layer performance greatly, is more satisfactory catalyst layer for proton exchange film fuel cell;
2, the vertical channel of the inherent advantage of ordered nano-structure Catalytic Layer formation will improve the oxygen transmission speed;
3, platinum particles is seated in electronic conductor and proton conductor at the interface, causes utilizing most effectively platinum catalyst;
3, the ordered nano-structure Catalytic Layer can form super hydrophobic, thereby promotes more water to shift out from Catalytic Layer, thereby improves the quality transmission speed.
Description of drawings
Drawings attached four width of cloth of the present invention, wherein
Fig. 1 a is the PtCo/ Catalytic Layer surface SEM scintigram of not externally-applied magnetic field coated catalysts slurry,
Fig. 1 b is the PtCo/ Catalytic Layer surface SEM scintigram of externally-applied magnetic field coated catalysts slurry,
Fig. 2 is that externally-applied magnetic field makes orderly Catalytic Layer electrode and the Catalytic Layer electrode cyclic voltammetry curve figure that does not add magnetic field, and solid line is the Catalytic Layer electrode cyclic voltammetry curve that does not add magnetic field among the figure, and dotted line is that externally-applied magnetic field makes orderly Catalytic Layer electrode cyclic voltammetry curve,
Fig. 3 is that externally-applied magnetic field makes orderly Catalytic Layer electrode and the Catalytic Layer electrode discharge performance chart that does not add magnetic field; Among the figure; The curve of band round dot is the curve that externally-applied magnetic field makes orderly Catalytic Layer electrode, and the curve of band triangulation point is the curve that does not add the Catalytic Layer electrode in magnetic field.
Embodiment
Below in conjunction with embodiment the present invention is described further.
Take by weighing that to contain Pt be 50% PtCo/C catalyst 16mg, 5% Nafion solution 50mg mixes, and with isopropanol to 20ml, the catalyst pulp of system is divided into 2 parts.2.5 * 4cm
2Diffusion layer be placed on the magnet of 0.3T, be sprayed on a copy of it catalyst pulp on the above-mentioned diffusion layer with airbrush catalyst loading 0.4mgPt/cm again
2, room temperature is dried the recession lower magnet, and the diffusion layer that will spray catalyst pulp again forms orderly Catalytic Layer at 80 ℃ of oven dry 30min.Be cut into two 5cm to the above-mentioned electrode that contains orderly Catalytic Layer
2Electrode is placed on the two sides of a Nafion115 film to two electrodes, under 140 ℃, and hot pressing 1.5min on hot press.Make membrane electrode, on the monocell evaluating apparatus, cooperate electrochemical workstation to carry out cyclic voltammetric test and battery performance evaluation.
Be sprayed on another part catalyst the 2.5 * 4cm that is not placed on the magnet
2Diffusion layer on, other steps are identical with the step that coated catalysts slurry on magnet makes membrane electrode, make the not membrane electrode of coated catalysts slurry on magnet, under similarity condition, carry out the monocell evaluation.The performance that compares two kinds of electrodes.
Can be found out by the SEM scintigram: the Catalytic Layer that under the externally-applied magnetic field situation, prepares has tangible order, and like Fig. 1 b, the Catalytic Layer that does not prepare under the externally-applied magnetic field situation does not have order, like Fig. 1 a.Can find out the performance of the Catalytic Layer electrode that under the performance of the orderly Catalytic Layer electrode that adds under the magnetic field condition preparation obviously is superior to externally-applied magnetic field condition not, prepares by the cyclic voltammetry curve figure (Fig. 2) of two kinds of electrodes and the discharge performance figure (Fig. 3) of two kinds of electrodes.
Claims (4)
1. orderly Catalytic Layer preparation method of proton exchange membrane fuel cell electrode; Comprise that catalyst pulp preparation, catalyst pulp apply and oven dry; Said catalyst pulp preparation comprises: the Nafion solution of PtCo/C or PtFe/C or PtNi/C catalyst and 5% is mixed for the 3:1 mass ratio by catalyst: Nafion (dry weight); And with isopropanol 10-50 doubly, form black ink sap-shape slurry; Said oven dry is with having applied diffusion layer that catalyst pulp and room temperature dried or dielectric film at 80-100 ℃ of oven dry 30min down; It is characterized in that it is in the coating that adds under the magnetic field condition that said catalyst pulp applies; Coating under the said externally-applied magnetic field condition is coated in catalyst pulp on the diffusion layer or dielectric film that is placed on the magnet; After room temperature is dried, again magnet is withdrawn diffusion layer or the dielectric film that has applied catalyst pulp.
2. according to the orderly Catalytic Layer preparation method of the said a kind of proton exchange membrane fuel cell electrode of claim 1, it is characterized in that said magnet is permanent magnet or electromagnet, magnet strength is 0.2-3T.
3. according to the orderly Catalytic Layer preparation method of the said a kind of proton exchange membrane fuel cell electrode of claim 1, it is characterized in that the said catalyst loading that is coated in catalyst pulp on diffusion layer or the dielectric film is 0.2-0.4mg/cm
2
4. according to the orderly Catalytic Layer preparation method of the said a kind of proton exchange membrane fuel cell electrode of claim 1, it is characterized in that said catalyst pulp painting method is spraying.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617310A (en) * | 2015-02-13 | 2015-05-13 | 昆山桑莱特新能源科技有限公司 | Method for preparing fuel cell membrane electrode with sealing frame |
| CN104716333A (en) * | 2013-12-15 | 2015-06-17 | 中国科学院大连化学物理研究所 | Ordered gas diffusion electrode, and production method and application thereof |
| CN106898782A (en) * | 2015-12-21 | 2017-06-27 | 中国科学院大连化学物理研究所 | A kind of preparation of fuel cell electrode and the device of electrode is prepared using the method |
| CN106033817B (en) * | 2015-03-12 | 2018-11-09 | 中国科学院苏州纳米技术与纳米仿生研究所 | Amberplex, preparation method and the application of nano array structure |
| CN109935872A (en) * | 2017-12-15 | 2019-06-25 | 中国科学院大连化学物理研究所 | A kind of fuel cell catalyst layer, gas diffusion layers and preparation method based on it |
| CN111740119A (en) * | 2020-06-30 | 2020-10-02 | 电子科技大学 | Preparation method of fuel cell membrane electrode catalyst layer |
| CN112397737A (en) * | 2021-01-20 | 2021-02-23 | 北京科技大学 | Electric pile device of platinum-based magnetic field regulation fuel cell and manufacturing method thereof |
| 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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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104716333A (en) * | 2013-12-15 | 2015-06-17 | 中国科学院大连化学物理研究所 | Ordered gas diffusion electrode, and production method and application thereof |
| CN104716333B (en) * | 2013-12-15 | 2017-05-24 | 中国科学院大连化学物理研究所 | Ordered gas diffusion electrode, and production method and application thereof |
| CN104617310A (en) * | 2015-02-13 | 2015-05-13 | 昆山桑莱特新能源科技有限公司 | Method for preparing fuel cell membrane electrode with sealing frame |
| CN106033817B (en) * | 2015-03-12 | 2018-11-09 | 中国科学院苏州纳米技术与纳米仿生研究所 | Amberplex, preparation method and the application of nano array structure |
| CN106898782A (en) * | 2015-12-21 | 2017-06-27 | 中国科学院大连化学物理研究所 | A kind of preparation of fuel cell electrode and the device of electrode is prepared using the method |
| CN109935872A (en) * | 2017-12-15 | 2019-06-25 | 中国科学院大连化学物理研究所 | A kind of fuel cell catalyst layer, gas diffusion layers and preparation method based on it |
| 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 |
| CN112397737A (en) * | 2021-01-20 | 2021-02-23 | 北京科技大学 | Electric pile device of platinum-based magnetic field regulation fuel cell and manufacturing method thereof |
| 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: 20121107 |