CN108899561A - A method of air-breathing fuel battery negative pole oxygen concentration is improved using magnetic porous dielectric structure - Google Patents
A method of air-breathing fuel battery negative pole oxygen concentration is improved using magnetic porous dielectric structure Download PDFInfo
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- CN108899561A CN108899561A CN201810562472.4A CN201810562472A CN108899561A CN 108899561 A CN108899561 A CN 108899561A CN 201810562472 A CN201810562472 A CN 201810562472A CN 108899561 A CN108899561 A CN 108899561A
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- air
- negative pole
- battery negative
- breathing
- fuel battery
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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
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0247—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the form
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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
Abstract
The invention discloses a kind of methods for improving air-breathing fuel battery negative pole oxygen concentration using magnetic porous dielectric structure, it is characterised in that：Including air-breathing fuel battery negative pole gas passage, air-breathing fuel cell anode gas channel, Catalytic Layer and proton exchange membrane；It is important that wherein cathode gas passage is made of magnet and porous structure；It is combined by magnet with the porous structure being made of ferrimagnet, high-gradient magnetic field is formed in cathode gas passage, using Kelvin Force for the remarkable effect of paramagnetism oxygen and diamagnetism water, achieve the purpose that improve cathode oxygen concentration and cathode is discharged to generate water, to improve the power of fuel cell；This method can significantly improve the power of air-breathing formula fuel cell, be with a wide range of applications.
Description
Technical field
The present invention relates to the methods that cathode oxygen concentration is improved in the utilization of air-breathing hydrogen-oxygen fuel cell, specifically utilize
The high-gradient magnetic field generated in magnetic field environment magnetic porous media structure promotes air-breathing fuel battery negative pole gas logical
The method of oxygen coalescence in road.
Background technique
Hydrogen-oxygen fuel cell, anode consume hydrogen, and cathode consumption oxygen realizes chemical energy and electricity under the action of Catalytic Layer
The conversion process of energy.Hydrogen supplies in enough situations, and to a certain extent, the supply amount of oxygen decides the output of fuel cell
Electrical power.Usual Large-sized Communication tool, in hydrogen-oxygen fuel cell automobile, the cathode of hydrogen-oxygen fuel cell is provided by compressed air
Enough oxygen sustainable supplies need in battery system to be equipped with compressed air unit, and system is huge and complicated.
The portable use of the hydrogen-oxygen fuel cell of high volume energy density has extensive market prospects.In recent years it proposes
The concept of air-breathing hydrogen-oxygen fuel cell, proposed adoption cathode gas passage natural convection air realize cathode oxygen supply, from
And reduce the complexity of battery system.
The advantage that system existing for air-breathing hydrogen-oxygen fuel cell is simplified be it will be evident that but free convection provide yin
Pole oxygen supply is insufficient and caused by electrical power rapid drawdown be also fatal.Meanwhile the water that fuel cell reaction generates is in cathode side
Accumulation, undoubtedly to cathode gas circulation and oxygen feed and to form further obstruction, influence battery electrical power.Pass through in the prior art
The method that the use of cathode hydrophobic material accelerates water discharge, in the lower environment of oxygen concentration, it appears that cannot reach and further increase
The purpose of air-breathing fuel cell electric power.
Seek one kind can effective enriched in oxygen and effectively drain structure design be further increase air-breathing combustion
Expect the striving direction of battery volume energy density.
Summary of the invention
The purpose of the present invention is reforming existing air-breathing fuel battery negative pole gas path design, a kind of utilization is provided
The method that magnetic porous dielectric structure improves air-breathing fuel battery negative pole oxygen concentration, to realize air-breathing fuel
The further promotion of battery volume energy density.
To realize the present invention purpose and the technical solution adopted is that such, it is a kind of to be improved using magnetic porous dielectric structure
The method of air-breathing fuel battery negative pole oxygen concentration, it is characterised in that：By the surface graded magnetic field of porous structure to oxygen
Cathode oxygen coalescence is realized in suction-operated.
The porous structure includes air-breathing fuel battery negative pole gas passage, air-breathing anode of fuel cell
Gas passage, Catalytic Layer and proton exchange membrane.
The air-breathing fuel battery negative pole gas passage and air-breathing fuel cell anode gas channel are flat
Row is positioned opposite.The air-breathing fuel battery negative pole gas passage and air-breathing fuel cell anode gas channel
Between accompany Catalytic Layer and proton exchange membrane.
Oxygen in the air-breathing fuel battery negative pole gas passage enriched air.The air-breathing fuel
Cell anode gas channel is passed through hydrogen.
The air-breathing fuel battery negative pole gas passage includes magnet and porous structure.
The porous structure includes cellular composite structure or multifibres shape composite structure.
Porous structure is divided into several regions by the magnet.
The quantity of the magnet is M.The region quantity that the porous structure is separated is M-1.
The side of the air-breathing fuel battery negative pole gas passage is connected with Catalytic Layer, the other side and outside atmosphere
Environmental communication.
The side in air-breathing fuel cell anode gas channel is connected with Catalytic Layer, is formed and outside atmosphere ring
The hydrogen gas channel of border isolation.
Further, perpendicular to Catalytic Layer, the magnet magnetizes the magnet along Catalytic Layer direction is parallel to.
Different location magnet is arranged parallel to each other, and the N and S of different magnets are extremely positioned opposite.
Further, the porous structure is made of column structure array, and the material of the column structure is ferromagnetic gold
Belong to material or alloy material.Ferrimagnet includes iron, cobalt or nickel.
The cross section of the column structure include it is several, the cross section of the column structure includes round or equilateral triangle
Shape.
In the cross section：Areal extent is 10-5~5mm2, altitude range is 2~40mm.
Spacing range between the column structure is 0.1~5mm.
Further, the spacing of the two neighboring magnet is 1~30cm.
Further, the surface remanence strength range of the magnet is 0.1~1.5T, magnetic in the porous structure enveloping space
Field gradient range is 2 × 101~5 × 105T/m。
It is worth noting that：It is designed using special cathode gas passage, strengthens enrichment and the mass transfer of oxygen, help to improve
The power of air-breathing fuel cell.
Oxygen in air belongs to typical paramagnet, after air enters the magnetic field for having gradient, oxygen therein
Son is acted on by Kelvin Force, and the increased direction of magnetic field gradient (Kelvin Force, i.e. Kelvin force are directed toward in the direction of power
Wherein μ0For space permeability, 4 π × 10-7H/m；χ is susceptibility, oxygen susceptibility χ=3.45 × 10-3；B
For magnetic field strength, T).
So can be porous under magnets magnetic fields effect by setting porous structure and magnet in cathode gas passage lining
Structure is magnetized.Calculated result shows to be formed high magnetic field gradients in porous structure up to 2 × 105T/m.Water belongs to diamagnetism object
Matter, by the Kelvin Force for being directed toward magnetic field gradient reduction direction in cathode gas passage gradient magnetic, so cathode reaction is raw
At water help to be discharged in time, can further promote the mass transport process of cathode oxygen.Due to the effect of Kelvin Force, oxygen exists
Enrichment in porous structure.
Since porous media structure is close to cathode catalyst layer, oxygen is constantly consumed, it is possible to realize the continuous of oxygen
Enrichment to increase cathode oxygen, and then realizes the power ascension of fuel cell.
The solution have the advantages that unquestionable, the present invention has the following advantages that：
1) present invention is combined by magnet with the porous structure being made of ferrimagnet, is formed in cathode gas passage
High-gradient magnetic field, using Kelvin Force for the remarkable effect of paramagnetism oxygen and diamagnetism water, reach improve cathode oxygen concentration and
The purpose that cathode generates water is discharged, to improve the power of fuel cell.
2) method in the present invention can significantly improve the power of air-breathing formula fuel cell, have a wide range of applications
Prospect.
Detailed description of the invention
Fig. 1 is the air-breathing fuel cell schematic diagram in the present invention；
Fig. 2 is the air-breathing fuel battery negative pole gas passage enlarged drawing in the present invention.
In figure：Air-breathing fuel battery negative pole gas passage 1, magnet 101, porous structure 102, air-breathing combustion
Expect cell anode gas channel 2, Catalytic Layer 3 and proton exchange membrane 4.
Specific embodiment
Below with reference to embodiment, the invention will be further described, but should not be construed the above-mentioned subject area of the present invention only
It is limited to following embodiments.Without departing from the idea case in the present invention described above, according to ordinary skill knowledge and used
With means, various replacements and change are made, should all include within the scope of the present invention.
Embodiment 1：
A method of air-breathing fuel battery negative pole oxygen concentration, feature are improved using magnetic porous dielectric structure
It is：Cathode oxygen coalescence is realized to the suction-operated of oxygen by porous structure surface graded magnetic field.
The porous structure includes air-breathing fuel battery negative pole gas passage 1, air-breathing fuel cell sun
Pole gas passage 2, Catalytic Layer 3 and proton exchange membrane 4.
The air-breathing fuel battery negative pole gas passage 1 and air-breathing fuel cell anode gas channel 2
It is parallel positioned opposite.The air-breathing fuel battery negative pole gas passage 1 and air-breathing fuel cell anode gas
Catalytic Layer 3 and proton exchange membrane 4 are accompanied between channel 2.
Oxygen in 1 enriched air of air-breathing fuel battery negative pole gas passage.The air-breathing combustion
Material cell anode gas channel 2 is passed through hydrogen.
The air-breathing fuel battery negative pole gas passage 1 includes magnet 101 and porous structure 102.
Perpendicular to Catalytic Layer 3, the magnet 101 magnetizes the magnet 101 along 3 direction of Catalytic Layer is parallel to.Different location
Magnet 101 is arranged parallel to each other, and the N and S of different location magnet 101 are extremely positioned opposite.
The porous structure 102 includes cellular composite structure or multifibres shape composite structure.
Porous structure 102 is divided into several regions by the magnet 101.
The quantity of the magnet 101 is M.The region quantity that the porous structure 102 is separated is M-1.
The spacing of the two neighboring magnet 101 is 1~30cm.
The side of the air-breathing fuel battery negative pole gas passage 1 is connected with Catalytic Layer 3, and the other side is big with outside
Gas environmental communication.
The side in air-breathing fuel cell anode gas channel 2 is connected with Catalytic Layer 3, formation and outside atmosphere
The hydrogen gas channel of environment isolation.
The porous structure 102 is made of column structure array, and the material of the column structure is ferromagnetic metal material
Material or alloy material.Ferrimagnet includes iron, cobalt or nickel.
The cross section of the column structure include it is several, the cross section of the column structure includes round or equilateral triangle
Shape.
In the cross section：Areal extent is 10-5~5mm2, altitude range is 2~40mm.Between the column structure
Spacing range is 0.1~5mm.
The surface remanence strength range of the magnet 101 is 0.1~1.5T, magnetic in 102 enveloping space of porous structure
Field gradient range is 2 × 101~5 × 105T/m。
The present invention can realize oxygen in air-breathing fuel battery negative pole gas passage only by Kelvin Force
Enrichment, thus reach improve air-breathing fuel battery negative pole oxygen concentration purpose.The present invention is in the scheme of advancing a theory
On the basis of, high-gradient magnetic field is formd by Rational structure design.Air-breathing fuel battery negative pole can adsorb well
The oxygen of air, and the water that the reaction of Accelerating Removal fuel battery negative pole generates.
Embodiment 2：
As depicted in figs. 1 and 2, a kind of dense using magnetic porous dielectric structure raising air-breathing fuel battery negative pole oxygen
The method of degree, it is characterised in that：Cathode oxygen coalescence is realized to the suction-operated of oxygen by porous structure surface graded magnetic field.
The porous structure includes air-breathing fuel battery negative pole gas passage 1, air-breathing fuel cell sun
Pole gas passage 2, Catalytic Layer 3 and proton exchange membrane 4.
The air-breathing fuel battery negative pole gas passage 1 and air-breathing fuel cell anode gas channel 2
It is parallel positioned opposite.The air-breathing fuel battery negative pole gas passage 1 and air-breathing fuel cell anode gas
Catalytic Layer 3 and proton exchange membrane 4 are accompanied between channel 2.
Oxygen in 1 enriched air of air-breathing fuel battery negative pole gas passage.The air-breathing combustion
Material cell anode gas channel 2 is passed through hydrogen.
The air-breathing fuel battery negative pole gas passage 1 includes magnet 101 and porous structure 102.
Perpendicular to Catalytic Layer 3, the magnet 101 magnetizes the magnet 101 along 3 direction of Catalytic Layer is parallel to.Different magnets
101 is arranged parallel to each other, and the N and S of different magnets 101 are extremely positioned opposite.
The porous structure 102 includes cellular composite structure or multifibres shape composite structure.
Porous structure 102 is divided into several regions by the magnet 101.
The quantity of the magnet 101 is M.The region quantity that the porous structure 102 is separated is M-1.
The spacing of the two neighboring magnet 101 is 2.8cm.
The side of the air-breathing fuel battery negative pole gas passage 1 is connected with Catalytic Layer 3, and the other side is big with outside
Gas environmental communication.
The side in air-breathing fuel cell anode gas channel 2 is connected with Catalytic Layer 3, formation and outside atmosphere
The hydrogen gas channel of environment isolation.
The porous structure 102 is made of column structure array, and the material of the column structure is ferromagnetic metal material
Material or alloy material.Ferrimagnet includes iron, cobalt or nickel.
The cross section of the column structure is circle.
In the cross section：Area is 2 × 10-4mm2, it is highly 3mm.Spacing between the column structure is 0.3mm.
The surface remanence intensity of the magnet 101 is 0.6T, and magnetic field gradient is 4 in 102 enveloping space of porous structure
×105T/m。
The present invention can realize oxygen in air-breathing fuel battery negative pole gas passage only by Kelvin Force
Enrichment, thus reach improve air-breathing fuel battery negative pole oxygen concentration purpose.The present invention is in the scheme of advancing a theory
On the basis of, high-gradient magnetic field is formd by Rational structure design.Air-breathing fuel battery negative pole can adsorb well
The oxygen of air, and the water that the reaction of Accelerating Removal fuel battery negative pole generates.
Claims (5)
1. a kind of method for improving air-breathing fuel battery negative pole oxygen concentration using magnetic porous dielectric structure, feature exist
In：Cathode oxygen coalescence is realized to the suction-operated of oxygen by porous structure surface graded magnetic field；
The porous structure includes air-breathing fuel battery negative pole gas passage (1), air-breathing anode of fuel cell
Gas passage (2), Catalytic Layer (3) and proton exchange membrane (4)；
The air-breathing fuel battery negative pole gas passage (1) and air-breathing fuel cell anode gas channel (2)
It is parallel positioned opposite；The air-breathing fuel battery negative pole gas passage (1) and air-breathing anode of fuel cell gas
Catalytic Layer (3) and proton exchange membrane (4) are accompanied between body channel (2)；
Oxygen in air-breathing fuel battery negative pole gas passage (1) enriched air；The air-breathing fuel
Cell anode gas channel (2) is passed through hydrogen；
The air-breathing fuel battery negative pole gas passage (1) includes magnet (101) and porous structure (102)；
The porous structure (102) includes cellular composite structure or multifibres shape composite structure；
Porous structure (102) is divided into several regions by the magnet (101)；
The quantity of the magnet (101) is M；The region quantity that the porous structure (102) is separated is M-1；
The side of the air-breathing fuel battery negative pole gas passage (1) is connected with Catalytic Layer (3), and the other side is big with outside
Gas environmental communication；
The side in air-breathing fuel cell anode gas channel (2) is connected with Catalytic Layer (3), formation and outside atmosphere
The hydrogen gas channel of environment isolation.
2. a kind of magnetic porous dielectric structure of utilization according to claim 1 improves air-breathing fuel battery negative pole oxygen
The method of concentration, it is characterised in that：The magnet (101) is parallel to catalysis perpendicular to Catalytic Layer (3), magnet (101) edge
The magnetization of layer (3) direction；
The magnet (101) of different location is arranged parallel to each other, and the N and S of different magnets (101) are extremely positioned opposite.
3. a kind of magnetic porous dielectric structure of utilization according to claim 1 improves air-breathing fuel battery negative pole oxygen
The method of concentration, it is characterised in that：The porous structure (102) is made of column structure array, the material of the column structure
For ferromagnetic metal material or alloy material；Ferrimagnet includes iron, cobalt or nickel；
The cross section of the column structure include it is several, the cross section of the column structure includes round or equilateral triangle；
In the cross section：Areal extent is 10-5~5mm2, altitude range is 2~40mm；
Spacing range between the column structure is 0.1~5mm.
4. a kind of magnetic porous dielectric structure of utilization according to claim 1 improves air-breathing fuel battery negative pole oxygen
The method of concentration, it is characterised in that：The spacing of the two neighboring magnet (101) is 1~30cm.
5. a kind of magnetic porous dielectric structure of utilization according to claim 1 improves air-breathing fuel battery negative pole oxygen
The method of concentration, it is characterised in that：The surface remanence strength range of the magnet (101) is 0.1~1.5T, the porous structure
(102) magnetic field gradient range is 2 × 10 in the enveloping space1~5 × 105T/m。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810562472.4A CN108899561B (en) | 2018-06-04 | 2018-06-04 | Method for improving oxygen concentration of cathode of air self-breathing fuel cell |
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| CN201810562472.4A CN108899561B (en) | 2018-06-04 | 2018-06-04 | Method for improving oxygen concentration of cathode of air self-breathing fuel cell |
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| CN108899561B CN108899561B (en) | 2020-11-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110534751A (en) * | 2019-09-04 | 2019-12-03 | 重庆大学 | Anode and cathode stacked passive type paper base microfluid fuel cell positioned opposite |
| CN113851686A (en) * | 2021-11-30 | 2021-12-28 | 华中科技大学 | Hydrogen fuel cell stack device based on magnetic field regulation and control |
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|---|---|---|---|---|
| CN110534751A (en) * | 2019-09-04 | 2019-12-03 | 重庆大学 | Anode and cathode stacked passive type paper base microfluid fuel cell positioned opposite |
| CN113851686A (en) * | 2021-11-30 | 2021-12-28 | 华中科技大学 | Hydrogen fuel cell stack device based on magnetic field regulation and control |
| CN113851686B (en) * | 2021-11-30 | 2022-03-11 | 华中科技大学 | Hydrogen fuel cell stack device based on magnetic field regulation and control |
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