CN101043080A - Fuel battery membrane electrode - Google Patents
Fuel battery membrane electrode Download PDFInfo
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- CN101043080A CN101043080A CNA2007100218158A CN200710021815A CN101043080A CN 101043080 A CN101043080 A CN 101043080A CN A2007100218158 A CNA2007100218158 A CN A2007100218158A CN 200710021815 A CN200710021815 A CN 200710021815A CN 101043080 A CN101043080 A CN 101043080A
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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
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Abstract
The invention discloses a fuel cell film electrode that includes anode catalyzing layer(2), cathode catalyzing layer(3) and proton exchanging film(1), and anode gas pervasion layer(4) which is out of the anode catalyzing layer(2) and the cathode catalyzing layer(3), cathode gas pervasion layer(5), plane size of said anode gas pervasion layer(4) is less than the cathode gas pervasion layer(5), airproofing ring(7) is set at the outer edge of the anode gas pervasion layer(4), said airproofing ring(7) is clamped by the flow field plate(6) of the anode gas pervasion layer(4) and the cathode gas pervasion layer(5). The film structure can simplify the manufacture and airproofing work corresponding with traditional film electrode structure, the airproofing effect can be guaranteed.
Description
Technical field
The present invention relates to a kind of fuel cell membrane electrode.
Background technology
Fuel cell is the Blast Furnace Top Gas Recovery Turbine Unit (TRT) that an energy is directly changed into chemical energy electric energy.Fuel cell especially Proton Exchange Membrane Fuel Cells except, noise pollution-free in when generating is low, also have and do not have corrosion, start fast, preparation easily, power density is big, generating efficiency height, many advantages such as long service life, therefore, in fields such as the vehicles, generating equipment, military affairs, space flight, wide application prospect is arranged all.
Proton Exchange Membrane Fuel Cells is made up of a plurality of monocells, and monocell is made up of two blocks of gas stream field plates and a slice membrane electrode, and membrane electrode is sandwiched in the centre of two blocks of gas stream field plates.The electronics that the membrane electrode both sides can will take place to generate in the electrochemical reaction process with conductive body is drawn by external circuit, constitutes current circuit.
Adopting hydrogen is fuel, and the air that contains oxygen is in the Proton Exchange Membrane Fuel Cells of oxidant, and fuel hydrogen has just produced hydrogen cation (or being proton) in the catalytic electrochemical reaction of anode region.Proton exchange membrane helps the hydrogen cation to move to the cathodic region from the anode region.In addition, proton exchange membrane is separated the air-flow and the oxygen containing air-flow of hydrogen fuel, they can not mixed mutually and produces explosion type reaction.
In the cathodic region, oxygen obtains electronics on catalyst surface, forms anion, and moves the cation reaction of coming, reaction of formation product water with the anode region.In the Proton Exchange Membrane Fuel Cells that adopts hydrogen, air, anode reaction and cathode reaction can be expressed in order to following equation:
Anode reaction: H
2=2H
++ 2e
-
Cathode reaction: O
2+ 4H
++ 4e
-=2H
2O
In typical Proton Exchange Membrane Fuel Cells, membrane electrode has the branch of three-decker, five-layer structure and seven-layer structure.Three-decker is directly to make Catalytic Layer on film, and membrane electrode is made of anode catalyst layer, film and cathode catalysis layer; Five-layer structure is to increase gas diffusion layers on the basis of three-decker outside anode catalyst layer and cathode catalysis layer respectively, and seven-layer structure then is to increase sealing ring around gas diffusion layers again.In said structure, anode and negative electrode are in full accord dimensionally.
In order to make Proton Exchange Membrane Fuel Cells be in high performance operating state, must all the time film both sides gas be isolated fully, therefore, sealing is necessary.Yet sealing also is difficult point and key technology in the fuel cell.In order to reach sealing effectiveness, what time followingly need to consider:
The first, it is consistent that the sealing ring shape and size of anode and cathode side are wanted, otherwise because the dislocation of sealing ring can lose sealing effectiveness, also can cause being clipped in the middle film of sealing ring or other materials distortion or damage;
The second, sealing ring must be provided with hard gasket through the place of runner on runner, enters runner to avoid sealing ring to be squeezed, thereby stops up runner, influences flowing of water, gas.
For satisfying above-mentioned requirements, must carry out precision to sealing ring and make and install, thereby expend the plenty of time.
Summary of the invention
The invention provides a kind of fuel cell membrane electrode, it can simplify hermetically-sealed construction, the convenient installation, and can guarantee sealing effectiveness.
The present invention can be achieved through the following technical solutions: a kind of fuel cell membrane electrode, comprise anode catalyst layer, cathode catalysis layer and proton exchange membrane between the two, and anode gas diffusion layer, cathode gas diffusion layer outside anode catalyst layer and cathode catalysis layer, described anode gas diffusion layer planar dimension is less than cathode gas diffusion layer, the outer peripheral edges of anode gas diffusion layer are provided with sealing ring, and described sealing ring supports clamping by membrane electrode anode gas diffusion layer outer flow-field plate and cathode gas diffusion layer.
Among the present invention, preferred version is the relative cathode gas diffusion layer of anode gas diffusion layer planar dimension all little 0.1-5mm on periphery, and more preferably scheme is the relative cathode gas diffusion layer of anode gas diffusion layer planar dimension all little 0.5-2mm on periphery.Membrane electrode can be circular, also can be square.
Owing to adopted as above technical scheme, the sealing ring of anode gas diffusion layer outer peripheral edges is separated by by proton exchange membrane and is contacted with cathode gas diffusion layer, cathode gas diffusion layer plays the effect that sealing ring is provided planar support, and cathode side does not then need to place the sealing ring at membrane electrode.Make the sufficient space that is sealed with of anode-side antianode gas so on the one hand; On the other hand, the anode-side sealing ring is subjected to the planar support of the flow-field plate outside cathode gas diffusion layer and the anode gas diffusion layer, and sealing ring can not be moved, thereby can fully guarantee sealing effectiveness.The present invention has simplified hermetically-sealed construction, and is easy for installation, need not expend a large amount of set-up times.
Description of drawings
Fig. 1 is a conventional film electrode structure schematic diagram.
Fig. 2 is a film electrode structure schematic diagram of the present invention.
Below in conjunction with the drawings and the specific embodiments, the invention will be further described.
Embodiment
Among Fig. 1, proton exchange membrane 1 is clipped in the middle by anode catalyst layer 2 and cathode catalysis layer 3, anode gas diffusion layer 4 and cathode gas diffusion layer 5 place respectively outside anode catalyst layer 2 and the cathode catalysis layer 3, and anode catalyst layer 2 and cathode catalysis layer 3 and gas diffusion layers are on all four dimensionally.Two flow-field plate 6 place respectively outside anode gas diffusion layer 4 and the cathode gas diffusion layer 5, and anode and cathode reaction gas runner and collected current are provided.Outer peripheral edges at anode gas diffusion layer 4 and cathode gas diffusion layer 5 are placed with sealing ring 7 respectively, and the sealing ring 7 of anode-side and cathode side is separated by proton exchange membrane 1.Sealing ring 7 relies on flow-field plate 6 as supporting.Because proton exchange membrane 1 is very thin, be easy to cause being out of shape or tearing because of the dislocation of both sides sealing circle 7.For this reason, must accurately locate sealing ring 7.
Among Fig. 2, proton exchange membrane 1 is clipped in the middle by anode catalyst layer 2 and cathode catalysis layer 3, anode gas diffusion layer 4 and cathode gas diffusion layer 5 place respectively outside anode catalyst layer 2 and the cathode catalysis layer 3, anode gas diffusion layer 4 is little than cathode gas diffusion layer 5 dimensionally, only places the sealing ring 7 that seals at membrane electrode in the anode gas diffusion layer outer peripheral edges.Sealing ring 7 one sides are support with the outer flow-field plate 6 of anode gas diffusion layer, opposite side then is to be support across proton exchange membrane 1 with cathode gas diffusion layer 5 and cathode flow field plate 6, sealing ring 7 can not misplace like this, and proton exchange membrane 1 can be out of shape or tear yet.This film electrode structure can be simplified making and seal operation with respect to traditional film electrode structure.
Among the present invention, preferred version is the relative cathode gas diffusion layer 5 of anode gas diffusion layer 4 planar dimensions all little 0.1-5mm on periphery, and more preferably scheme is the relative cathode gas diffusion layer 5 of anode gas diffusion layer 4 planar dimensions all little 0.5-2mm on periphery.Membrane electrode can be circular, also can be square.
Claims (4)
1, a kind of fuel cell membrane electrode, comprise anode catalyst layer (2), cathode catalysis layer (3) and proton exchange membrane between the two (1), and the anode gas diffusion layer (4) outside anode catalyst layer (2) and cathode catalysis layer (3), cathode gas diffusion layer (5), it is characterized in that described anode gas diffusion layer (4) planar dimension is less than cathode gas diffusion layer (5), the outer peripheral edges of anode gas diffusion layer (4) are provided with sealing ring (7), and described sealing ring (7) supports clamping by membrane electrode anode gas diffusion layer (4) outer flow-field plate (6) and cathode gas diffusion layer (5).
2, fuel cell membrane electrode according to claim 1 is characterized in that the outer peripheral edges little 0.1-5mm of anode gas diffusion layer (4) planar dimension with respect to cathode gas diffusion layer (5).
3, fuel cell membrane electrode according to claim 2 is characterized in that the outer peripheral edges little 0.5-2mm of anode gas diffusion layer (4) planar dimension with respect to cathode gas diffusion layer (5).
4,, it is characterized in that described membrane electrode flat shape is rectangle or circle according to claim 1,2 or 3 described fuel cell membrane electrodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100218158A CN101043080A (en) | 2007-04-29 | 2007-04-29 | Fuel battery membrane electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100218158A CN101043080A (en) | 2007-04-29 | 2007-04-29 | Fuel battery membrane electrode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101043080A true CN101043080A (en) | 2007-09-26 |
Family
ID=38808407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100218158A Pending CN101043080A (en) | 2007-04-29 | 2007-04-29 | Fuel battery membrane electrode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101043080A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102130346A (en) * | 2010-01-15 | 2011-07-20 | 扬光绿能股份有限公司 | Excessive hydrogen depletion unit, fuel cell unit and fuel cell system |
| CN102420335A (en) * | 2011-10-25 | 2012-04-18 | 中国科学院长春应用化学研究所 | Assembling method of self-breathing type direct alcohol fuel cell |
| CN110010920A (en) * | 2019-04-25 | 2019-07-12 | 重庆宗申氢能源动力科技有限公司 | A kind of fuel cell flow field board |
| CN112103541A (en) * | 2020-09-17 | 2020-12-18 | 广东国鸿氢能科技有限公司 | Integrated sealed membrane electrode structure |
| CN112448006A (en) * | 2019-08-29 | 2021-03-05 | 未势能源科技有限公司 | Membrane electrode assembly and packaging method thereof |
| CN112531183A (en) * | 2020-12-03 | 2021-03-19 | 中国科学院大连化学物理研究所 | Fuel cell membrane electrode sealing assembly, packaging process and continuous packaging equipment |
| CN113972390A (en) * | 2020-07-23 | 2022-01-25 | 未势能源科技有限公司 | Fuel cell unit cell |
| CN114420944A (en) * | 2022-01-19 | 2022-04-29 | 一汽解放汽车有限公司 | Fuel cell membrane electrode, preparation method thereof and fuel cell |
-
2007
- 2007-04-29 CN CNA2007100218158A patent/CN101043080A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102130346A (en) * | 2010-01-15 | 2011-07-20 | 扬光绿能股份有限公司 | Excessive hydrogen depletion unit, fuel cell unit and fuel cell system |
| CN102420335A (en) * | 2011-10-25 | 2012-04-18 | 中国科学院长春应用化学研究所 | Assembling method of self-breathing type direct alcohol fuel cell |
| CN110010920A (en) * | 2019-04-25 | 2019-07-12 | 重庆宗申氢能源动力科技有限公司 | A kind of fuel cell flow field board |
| CN112448006A (en) * | 2019-08-29 | 2021-03-05 | 未势能源科技有限公司 | Membrane electrode assembly and packaging method thereof |
| CN113972390A (en) * | 2020-07-23 | 2022-01-25 | 未势能源科技有限公司 | Fuel cell unit cell |
| CN112103541A (en) * | 2020-09-17 | 2020-12-18 | 广东国鸿氢能科技有限公司 | Integrated sealed membrane electrode structure |
| CN112531183A (en) * | 2020-12-03 | 2021-03-19 | 中国科学院大连化学物理研究所 | Fuel cell membrane electrode sealing assembly, packaging process and continuous packaging equipment |
| CN112531183B (en) * | 2020-12-03 | 2022-02-11 | 中国科学院大连化学物理研究所 | Fuel cell membrane electrode sealing assembly, packaging process and continuous packaging equipment |
| CN114420944A (en) * | 2022-01-19 | 2022-04-29 | 一汽解放汽车有限公司 | Fuel cell membrane electrode, preparation method thereof and fuel cell |
| CN114420944B (en) * | 2022-01-19 | 2024-02-23 | 一汽解放汽车有限公司 | Fuel cell membrane electrode, preparation method thereof and fuel cell |
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