CN105789633B - A non-precious metal porous framework gas diffusion electrode and its preparation and application - Google Patents
A non-precious metal porous framework gas diffusion electrode and its preparation and application Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims description 41
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- 239000003054 catalyst Substances 0.000 claims abstract description 48
- 239000010953 base metal Substances 0.000 claims abstract description 25
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- 229920000557 Nafion® Polymers 0.000 claims abstract description 16
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 6
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- 239000007789 gas Substances 0.000 claims description 31
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- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 13
- 239000000428 dust Substances 0.000 claims description 12
- 239000000446 fuel Substances 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- 239000003575 carbonaceous material Substances 0.000 claims description 8
- 239000010941 cobalt Substances 0.000 claims description 8
- 229910017052 cobalt Inorganic materials 0.000 claims description 8
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 8
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
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- 239000007788 liquid Substances 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims description 5
- 239000011574 phosphorus Substances 0.000 claims description 5
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 4
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 4
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- 229910052801 chlorine Inorganic materials 0.000 claims description 4
- 229910000428 cobalt oxide Inorganic materials 0.000 claims description 4
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 claims description 4
- 239000011737 fluorine Substances 0.000 claims description 4
- 229910052731 fluorine Inorganic materials 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- VAKIVKMUBMZANL-UHFFFAOYSA-N iron phosphide Chemical compound P.[Fe].[Fe].[Fe] VAKIVKMUBMZANL-UHFFFAOYSA-N 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910000480 nickel oxide Inorganic materials 0.000 claims description 4
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 claims description 4
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- 239000002041 carbon nanotube Substances 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 2
- VMWYVTOHEQQZHQ-UHFFFAOYSA-N methylidynenickel Chemical compound [Ni]#[C] VMWYVTOHEQQZHQ-UHFFFAOYSA-N 0.000 claims description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 2
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
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- 238000000034 method Methods 0.000 description 4
- 239000002243 precursor Substances 0.000 description 4
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 4
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- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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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Abstract
A kind of base metal stephanoporate framework gas-diffusion electrode, porous skeleton structure Non-precious Metal Catalysts layer including gas diffusion layers and based on gas diffusion layers, porous skeleton structure Non-precious Metal Catalysts layer is attached to one side surface of gas diffusion layers, and in the microcosmic upper well-regulated pore structure of tool.The porous skeleton structure is to be attached with non-precious metal catalyst on skeleton using Nafion polyion as skeleton.The well-regulated pore structure of tool is to form equally distributed hole in diffusion layer side nano surface skeleton, and be interconnected between hole, and pore size is 0.5 micron to 50 microns.There is the present invention hole in Catalytic Layer to be uniformly distributed, and 0.5 micron to 50 microns of macroporous structure exposes more catalyst activity positions, be conducive to the substance transmitting in Catalytic Layer while increasing the utilization rate of catalyst.
Description
Technical field
The present invention relates to a kind of base metal stephanoporate framework gas-diffusion electrode, specifically one kind can be used for proton friendship
Change membrane cell, metal-air battery, the gas-diffusion electrode of alkaline fuel cell.
The invention further relates to the preparation methods of above-mentioned base metal stephanoporate framework gas-diffusion electrode.
Background technique
Proton Exchange Membrane Fuel Cells since it has a extensive future, it is environmental-friendly the features such as, researcher carries out it
In-depth study, especially its core component MEA.Currently, be mostly used platinum in MEA as catalyst, but platinum it is expensive and
Resource is limited, seriously constrains the commercialization process of fuel cell technology.Therefore, urging based on non-noble metallic materials is developed
Change material, is current energy technology field one of critical issue urgently to be resolved, the research of non-precious metal catalyst is main at present
It concentrates on improving active bit quantity in catalyst and increases catalyst pores appearance to be conducive on mass transfer, but urged for base metal
It is fewer to change layer research.
In document (Journal of the American Chemical Society, 2013,135,16002-16005)
With silicon nano, ordered mesoporous silicon and montmorillonite have been synthesized as template with different mesoporous non-precious metal catalysts.Text
It is porous non-expensive to be formed with graphene hydrogel to offer (Electrochemistry Communications, 2013,28,5-8)
Metallic catalyst, above-mentioned document can form porous non-precious metal catalyst.Due to the active site of non-precious metal catalyst
Less, Non-precious Metal Catalysts layer is usually thicker, and porous non-precious metal catalyst can not improve the substance mass transfer of Catalytic Layer.
Summary of the invention
It is an object of the invention to prepare a kind of base metal gas-diffusion electrode of porous skeleton structure, such gas expands
It is smaller to dissipate electrode substance resistance to mass tranfer, is used for Proton Exchange Membrane Fuel Cells, performance greatly improves.
To realize that foregoing invention content, the present invention are realized using following technical scheme:
A kind of base metal stephanoporate framework gas-diffusion electrode, including gas diffusion layers and based on the porous of gas diffusion layers
Skeleton structure Non-precious Metal Catalysts layer, porous skeleton structure Non-precious Metal Catalysts layer are attached to one side surface of gas diffusion layers, and
In the microcosmic upper well-regulated pore structure of tool.
The porous skeleton structure is to be attached with non-precious metal catalyst on skeleton using Nafion polyion as skeleton.
It is described to have well-regulated pore structure to form equally distributed hole in diffusion layer side nano surface skeleton, and
It is interconnected between hole, pore size is 0.5 micron to 50 microns.
The non-precious metal catalyst or be one or more kinds of doping in iron, cobalt, nickel carbon materials, or for boron, nitrogen,
Oxygen, fluorine, sulphur, phosphorus, in chlorine one or more kinds of doping carbon materials, or be one of iron oxide, cobalt oxide, nickel oxide,
It or is one of iron phosphide, phosphatization cobalt, nickel phosphide.
The mass percentage of Nafion is 5-95% in the Catalytic Layer
The mass percentage of Nafion is preferably 15-55% in the Catalytic Layer.
The gas diffusion layers are made of supporting layer and microporous layers；The supporting layer is carbon paper or carbon cloth；The microporous layers
For one or both of XC-72 carbon dust, BP2000 carbon dust, acetylene black carbon powder, carbon nanotube, carbon nano-fiber, graphene with
It is made after upper mixing PTFE and/or Nafion by scratching, brushing, spraying or being screen printed onto support layer surface；It is described porous
Skeleton structure Catalytic Layer is attached to one side surface of microporous layers of gas diffusion layers.
The preparation method of the gas-diffusion electrode, including following preparation step,
(a) preparation of catalyst slurry:
Non-precious metal catalyst is dispersed in water, Nafion solution is added and is uniformly mixed, being concentrated into solid content is
5-25wt.%, formation prepare stephanoporate framework Non-precious Metal Catalysts layer slurries；
(b) preparation of Catalytic Layer
The blade coating of catalyst slurry obtained by step (a), brushing or silk-screen printing in gas diffusion layer surface and are freezed
It is dried, base metal stephanoporate framework gas-diffusion electrode is obtained after taking-up.
Non-precious metal catalyst described in step (a) or the carbon material for doping one or more kinds of in iron, cobalt, nickel,
Or the carbon material for doping one or more kinds of in boron, nitrogen, oxygen, fluorine, sulphur, phosphorus, chlorine, or be iron oxide, cobalt oxide, nickel oxide
One of, or be one of iron phosphide, phosphatization cobalt, nickel phosphide.
The mass concentration that non-precious metal catalyst described in step (a) is dispersed in water is 1-40mg/ml；The mixing is molten
The mass ratio of Nafion and non-precious metal catalyst is 1:19-19:1 in liquid.
In Nafion solution described in step (a) solvent be one or both of water, ethyl alcohol, isopropanol, normal propyl alcohol with
On.
Thickening temperature described in step (a) is 80-95 DEG C, can remove most of alcohol in mixed solution in the process
Class, to guarantee going on smoothly for subsequent freezing dry process.In step (b) during freeze-drying process, freezing conditions are
Subzero freezing, dry is to be vacuum-treated 24-72h in the case where being lower than 600Pa.
Prepared base metal stephanoporate framework gas-diffusion electrode can be used for Proton Exchange Membrane Fuel Cells or metal is empty
Pneumoelectric pond or alkaline fuel cell.
Compared with the preparation method of existing Non-precious Metal Catalysts layer, the invention has the following advantages that
1, hole is uniformly distributed in Catalytic Layer, and is interconnected between hole, and having pore size is 0.5 micron to 50 micro-
The macroporous structure of rice is conducive to the substance transmitting in Catalytic Layer；
2, pore structure is abundant, exposes more catalyst activity positions, increases the utilization rate of catalyst；
3, preparation method is simple, and the gas diffusion of such structure can be prepared as with various types of non-precious metal catalysts
Electrode.
Detailed description of the invention
The surface SEM of 2 Catalytic Layer of Fig. 1 embodiment schemes；
The surface HRSEM of 2 Catalytic Layer of Fig. 2 embodiment schemes；
The surface SEM of 1 Catalytic Layer of Fig. 3 comparative example schemes；
The surface HRSEM of 1 Catalytic Layer of Fig. 4 comparative example schemes；
The Proton Exchange Membrane Fuel Cells of gas-diffusion electrode prepared by Fig. 5 embodiment 2 and comparative example 1 as cathode assembling
The polarization curve and power density curve of monocell.
Specific embodiment
Below by way of example, the present invention is described in detail, but the present invention is not limited only to following embodiment.
Embodiment 1
(1) preparation of gas diffusion layers:
Toray carbon paper is soaked in 20% PTFE aqueous solution, sufficiently takes out and air-dry after infiltration, weighing.It is repeated
Above-mentioned steps, until PTFE carrying capacity is 15% or so.By Vulcan XC-72 carbon dust and relative to the PTFE water of gross mass 10%
Solution is uniformly mixed, and after being diluted with ethyl alcohol, is dispersed 20 minutes under ultrasound condition, is stirred evenly.By above-mentioned silicic acid anhydride
Carbon paper is placed on glass plate and fixes, by above-mentioned slurries blade coating in carbon paper surface, weighing, until carbon dust carrying capacity is 1mgcm-2, i.e.,
Obtain gas diffusion layers.
(2) preparation of base metal stephanoporate framework gas-diffusion electrode:
A. the preparation of precursor slurry
It disperses 20mg non-precious metal catalyst in 2mL deionized water, after ultrasonic disperse is uniform；It is added 600mg's
10%Nafion solution, re-ultrasonic dispersion is uniform, persistently stirs 6 hours at 70 degrees Celsius；Mixed solution is heated into solvent flashing,
It is 400mg (solid content 20%) to gross mass.
B. the freeze-drying of Catalytic Layer restores preparation
Slurries prepared by above-mentioned a step are scratched to gas diffusion layer surface, liquid nitrogen sufficiently freezes and is placed on freeze-drying
Prepared base metal stephanoporate framework gas-diffusion electrode can be obtained for 24 hours by being freeze-dried under the conditions of 10Pa in device.
Embodiment 2
(1) preparation of gas diffusion layers:
Toray carbon paper is soaked in 20% PTFE aqueous solution, sufficiently takes out and air-dry after infiltration, weighing.It is repeated
Above-mentioned steps, until PTFE carrying capacity is 15% or so.By Vulcan XC-72 carbon dust and relative to the PTFE water of gross mass 10%
Solution is uniformly mixed, and after being diluted with ethyl alcohol, is dispersed 20 minutes under ultrasound condition, is stirred evenly.By above-mentioned silicic acid anhydride
Carbon paper is placed on glass plate and fixes, by above-mentioned slurries blade coating in carbon paper surface, weighing, until carbon dust carrying capacity is 1mgcm-2, i.e.,
Obtain gas diffusion layers.
(2) preparation of base metal stephanoporate framework gas-diffusion electrode:
A. the preparation of precursor slurry
It disperses 20mg non-precious metal catalyst in 2mL deionized water, after ultrasonic disperse is uniform；It is added 200mg'sAqueous solution, re-ultrasonic dispersion is uniform, persistently stirs 6 hours at 70 degrees Celsius；Mixed solution is heated and is volatilized
Solvent, until gross mass is 200mg (solid content 20%).
B. the freeze-drying of Catalytic Layer restores preparation
Slurries prepared by above-mentioned a step are scratched to gas diffusion layer surface, liquid nitrogen sufficiently freezes and is placed on freeze-drying
Prepared base metal stephanoporate framework gas-diffusion electrode can be obtained for 24 hours by being freeze-dried under the conditions of 10Pa in device.
Embodiment 3
(1) preparation of gas diffusion layers:
Toray carbon paper is soaked in 20% PTFE aqueous solution, sufficiently takes out and air-dry after infiltration, weighing.It is repeated
Above-mentioned steps, until PTFE carrying capacity is 15% or so.By Vulcan XC-72 carbon dust and relative to the PTFE water of gross mass 10%
Solution is uniformly mixed, and after being diluted with ethyl alcohol, is dispersed 20 minutes under ultrasound condition, is stirred evenly.By above-mentioned silicic acid anhydride
Carbon paper is placed on glass plate and fixes, by above-mentioned slurries blade coating in carbon paper surface, weighing, until carbon dust carrying capacity is 1mgcm-2, i.e.,
Obtain gas diffusion layers.
(2) preparation of base metal stephanoporate framework gas-diffusion electrode:
A. the preparation of precursor slurry
It disperses 20mg non-precious metal catalyst in 2mL deionized water, after ultrasonic disperse is uniform；It is added 66.7mg'sAqueous solution, re-ultrasonic dispersion is uniform, persistently stirs 6 hours at 70 degrees Celsius；Mixed solution is heated and is volatilized
Solvent, until gross mass is 133mg (solid content 20%).
B. the freeze-drying of Catalytic Layer restores preparation
Slurries prepared by above-mentioned a step are scratched to gas diffusion layer surface, liquid nitrogen sufficiently freezes and is placed on freeze-drying
Prepared base metal stephanoporate framework gas-diffusion electrode can be obtained for 24 hours by being freeze-dried under the conditions of 10Pa in device.
Comparative example 1
(1) preparation of gas diffusion layers:
Toray carbon paper is soaked in 20% PTFE aqueous solution, sufficiently takes out and air-dry after infiltration, weighing.It is repeated
Above-mentioned steps, until PTFE carrying capacity is 15% or so.By Vulcan XC-72 carbon dust and relative to the PTFE water of gross mass 10%
Solution is uniformly mixed, and after being diluted with ethyl alcohol, is dispersed 20 minutes under ultrasound condition, is stirred evenly.By above-mentioned silicic acid anhydride
Carbon paper is placed on glass plate and fixes, by above-mentioned slurries blade coating in carbon paper surface, weighing, until carbon dust carrying capacity is 1mgcm-2, i.e.,
Obtain gas diffusion layers.
(2) preparation of traditional gas diffusion electrode:
A. the preparation of traditional structure composite precursor slurries
It disperses 20mg non-precious metal catalyst in 2mL deionized water, after ultrasonic disperse is uniform；It is added 200mg'sAqueous solution, re-ultrasonic dispersion is uniform, persistently stirs 6 hours at 70 degrees Celsius；Mixed solution is heated and is volatilized
Solvent, until gross mass is 200mg (solid content 20%).
B. the dry reduction preparation of conventional catalyst layer
Slurries prepared by above-mentioned a step are scratched to gas diffusion layer surface, is air-dried in air, then obtains traditional structure gas
Body diffusion electrode.
Comparison diagram 1-4 can be seen that base metal stephanoporate framework gas-diffusion electrode made from embodiment 2 with abundant
Pore structure has the macropore of some crackle shapes, is more the hole that mean size is 4um, this some holes is conducive to reactant in electrode
With the transmission of product, and there was only the macropore of crackle shape in comparative example 1, and without other holes, such electrode structure hole is relatively fewer,
It is unfavorable for the transmission of reactants and products in electrode.
Using gas-diffusion electrode made from embodiment 2 and comparative example 1 as cathode；Anode gas diffusion layer and embodiment 2
Identical, the platinum carrying capacity of anode catalyst layer is 0.25mg cm-2；Dielectric film is Nafion212 film, is assembled into proton exchange membrane combustion
Its performance is tested after material cell single cells.
Test condition are as follows: cathode oxygen flow velocity is 400ml/min, and anode hydrogen flow rate 200ml/min, 100% is humidified,
150kPa back pressure.
Test results are shown in figure 4, it can be seen that the monocell of base metal stephanoporate framework gas-diffusion electrode assembling is (real
Apply example 2) 50% is improved than monocell (comparative example 1) performance of traditional base metal electrode assembling.
Compared with prior art, there is the present invention hole in Catalytic Layer to be uniformly distributed, 0.5 micron to 50 microns of macropore knot
Structure exposes more catalyst activity positions, and the substance be conducive in Catalytic Layer while increasing the utilization rate of catalyst passes
It passs, preparation method of the present invention is simple, and the gas of such structure can be prepared as with various types of non-precious metal catalysts
Diffusion electrode.
Claims (12)
1. a kind of preparation method of base metal stephanoporate framework gas-diffusion electrode, it is characterised in that: base metal stephanoporate framework
Gas-diffusion electrode includes gas diffusion layers and the porous skeleton structure Non-precious Metal Catalysts layer based on gas diffusion layers, porous bone
Frame structure Non-precious Metal Catalysts layer is attached to one side surface of gas diffusion layers, and in the microcosmic upper well-regulated pore structure of tool, institute
Stating the well-regulated pore structure of tool is to form equally distributed hole, and phase between hole in diffusion layer side nano surface skeleton
Intercommunicated, pore size is 0.5 micron to 50 microns；
Including following preparation step,
(a) preparation of catalyst slurry:
Non-precious metal catalyst is dispersed in water, Nafion solution is added and is uniformly mixed, being concentrated into solid content is 5-
25wt.%, formation prepare stephanoporate framework Non-precious Metal Catalysts layer slurries；
(b) preparation of Catalytic Layer
The blade coating of catalyst slurry obtained by step (a), brushing or silk-screen printing in gas diffusion layer surface and are freeze-dried
Processing obtains base metal stephanoporate framework gas-diffusion electrode after taking-up.
2. the preparation method of stephanoporate framework gas-diffusion electrode as described in claim 1, it is characterised in that: the stephanoporate framework knot
Structure is to be attached with non-precious metal catalyst on skeleton using Nafion polyion as skeleton.
3. the preparation method of stephanoporate framework gas-diffusion electrode as described in claim 1, it is characterised in that: the base metal is urged
Agent or be one or more kinds of doping in iron, cobalt, nickel carbon materials, or to be a kind of in boron, nitrogen, oxygen, fluorine, sulphur, phosphorus, chlorine or
The carbon material of two or more doping, or be one of iron oxide, cobalt oxide, nickel oxide, or be iron phosphide, phosphatization cobalt, phosphatization
One of nickel.
4. the preparation method of stephanoporate framework gas-diffusion electrode as described in claim 1, it is characterised in that: in the Catalytic Layer
The mass percentage of Nafion is 5-95%.
5. the preparation method of stephanoporate framework gas-diffusion electrode as described in claim 1, it is characterised in that: in the Catalytic Layer
The mass percentage of Nafion is 15-55%.
6. the preparation method of stephanoporate framework gas-diffusion electrode as described in claim 1, it is characterised in that: the gas diffusion layers
It is made of supporting layer and microporous layers；The supporting layer is carbon paper or carbon cloth；The microporous layers be XC-72 carbon dust, BP2000 carbon dust,
After one or more of acetylene black carbon powder, carbon nanotube, carbon nano-fiber, graphene mix PTFE and/or Nafion
By blade coating, brushing, spray or be screen printed onto support layer surface be made；The porous skeleton structure Catalytic Layer is attached to gas
One side surface of microporous layers of diffusion layer.
7. the preparation method of gas-diffusion electrode as described in claim 1, it is characterised in that: base metal described in step (a)
Catalyst is the carbon materials adulterated one or more kinds of in iron, cobalt, nickel, or is a kind of in boron, nitrogen, oxygen, fluorine, sulphur, phosphorus, chlorine
Or the carbon material of two or more doping, or be one of iron oxide, cobalt oxide, nickel oxide, or be iron phosphide, phosphatization cobalt, phosphorus
Change one of nickel.
8. the preparation method of gas-diffusion electrode as described in claim 1, it is characterised in that: base metal described in step (a)
The mass concentration that catalyst is dispersed in water is 1-40mg/ml；Nafion and non-precious metal catalyst in the mixed solution
Mass ratio is 1:19-19:1.
9. the preparation method of gas-diffusion electrode as described in claim 1, it is characterised in that: Nafion described in step (a) is molten
Solvent is one or more of water, ethyl alcohol, isopropanol, normal propyl alcohol in liquid.
10. the preparation method of gas-diffusion electrode as described in claim 1, it is characterised in that: thickening temperature described in step (a)
It is 80-95 DEG C.
11. the preparation method of gas-diffusion electrode as described in claim 1, it is characterised in that: in step (b) at freeze-drying
During reason, freezing conditions are subzero freezing, and dry is to be vacuum-treated 24-72h in the case where being lower than 600Pa.
12. preparation method as described in claim 1, it is characterised in that: prepared base metal stephanoporate framework gas diffusion
Electrode can be used for Proton Exchange Membrane Fuel Cells or metal-air battery or alkaline fuel cell.
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| CN102881916A (en) * | 2012-09-28 | 2013-01-16 | 孙公权 | Gas diffusion electrode carried with double-shell core-shell catalyst and preparation and application thereof |
| CN103413947A (en) * | 2013-08-27 | 2013-11-27 | 武汉理工大学 | Fuel cell ordered porous nano-fiber single electrode, membrane electrode and preparation method |
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| CN102881916A (en) * | 2012-09-28 | 2013-01-16 | 孙公权 | Gas diffusion electrode carried with double-shell core-shell catalyst and preparation and application thereof |
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