CN200965892Y - Fuel battery composite gas-diffusion-layer - Google Patents
Fuel battery composite gas-diffusion-layer Download PDFInfo
- Publication number
- CN200965892Y CN200965892Y CNU2006200437230U CN200620043723U CN200965892Y CN 200965892 Y CN200965892 Y CN 200965892Y CN U2006200437230 U CNU2006200437230 U CN U2006200437230U CN 200620043723 U CN200620043723 U CN 200620043723U CN 200965892 Y CN200965892 Y CN 200965892Y
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- gas diffusion
- diffusion layer
- fuel cell
- layer
- conductive
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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
The utility model provides a composite gas diffusion layer for fuel battery, which consists of conventional gas diffusion layer that is composed of a layer of carbon paper, conductive carbon powder covering one surface of the carbon paper and PTFE; a gas diffusion layer with a uniform fixed hole is further comprised, which covers on the other surface of the carbon paper. The composite gas diffusion layer of the utility model applied to fuel battery effectively improves the performance of fuel battery, the balance for the water and thermal management and the operation stability of fuel battery.
Description
Technical field
The utility model relates to a kind of fuel cell, relates in particular to a kind of fuel cell composite gas diffusion layer.
Background technology
Carbon paper as a kind of can conduction, heat conduction, ventilative porous material, be widely used as the stock of fuel cell.Carbon paper mainly is a kind of porous material that is made of carbon fiber and graphitized carbon material, and material surface is more coarse.Fuel cell needs oxygen and hydrogen when work, oxygen and hydrogen can be diffused into by the micropore on the carbon paper on cell cathode catalyst layer and the anode catalyst layer; Product comprises that water also can get rid of by carbon paper; The heat that cell reaction produces is also derived by carbon paper; Electronics is also collected the back by carbon paper and is derived.So carbon paper plays important effect for the normal operation that guarantees fuel cell in fuel cell.
In order to improve battery performance, the one side of the carbon paper contact catalyst layer of being everlasting covers one deck and fills and leads up layer by what conductive carbon powder and PTFE layer mixture were formed.Filling and leading up that conductive carbon powder and PTFE layer mixture are formed contains a large amount of micropores in the layer, these micropores have the water balance of fuel metering battery and the effect that improves the gaseous diffusion uniformity.
In fuel cell system design, the scientific research and development personnel mainly by changing the flow Field Design of fuel cell, improve the service behaviour of monolithic battery.Good flow field can make fuel cell electrode operating state everywhere more approaching, and hydro-thermal management everywhere is relatively good, and electrode is worked under reasonable state.
For the bigger fuel cell pack of monolithic battery, flow Field Design relative complex.Common flow field is at the snakelike chute of the surface engraving of graphite cake, and many parallel snakelike chutes have been formed the flow field of fuel cell, as the MARK5 type fuel battery flow field of BALLARD company.
In order to make fuel cell electrode work even, to carry out humidification to reacting gas usually.The electrochemical reaction product of fuel cell is a water, these product waters mainly are to take away when flowing through the fuel battery flow field chute by the reacting gas that surpasses the metering ratio, thereby reacting gas is when flowing through the flow field chute of fuel cell, moisture in the gas is more and more, for the electrode that makes fuel cell not by water logging, the relative humidity of reacting gas generally is controlled at and is lower than 100%.Therefore the residing gas relative humidity of electrode of battery porch is lower, and exit gas relative humidity is than higher.Like this, on the whole monolithic electrode, the relative humidity of electrode work differs often, and entire electrode operating state everywhere is not too even, is unfavorable for the performance of electrode performance and the raising of battery life.
Summary of the invention
The purpose of this utility model is to solve the problems referred to above that prior art exists, and a kind of fuel cell composite gas diffusion layer is provided.
The purpose of this utility model is achieved in that a kind of fuel cell composite gas diffusion layer, be the thin layer layered structural articles, comprise the conventional gas diffusion layer, this conventional gas diffusion layer is made of one deck carbon paper and the conductive carbon powder and the PTFE layer that cover on face of carbon paper, also comprise an additional gas diffusion layer with even fixing hole, this additional gas diffusion layer covers the another side of carbon paper.
Described fuel cell composite gas diffusion layer is characterized in that: the even fixing hole on the described additional gas diffusion layer is every square centimeter of 100-20000, and the aperture is the 10-300 micron, and percent opening is 0.1-30%.
Described additional gas diffusion layer is made of the conductive foil with fixing even hole.
Described conductive foil comprises conductive metal foil and conductive non-metals paper tinsel.
Described conductive non-metals paper tinsel comprises the electrically conductive graphite paper tinsel, the preferred flexible graphite foil.
The utility model fuel cell composite gas diffusion layer is used on the fuel cell, can effectively improve fuel cell performance, improves the water management and the heat management balance of fuel cell, improves the operation stability of fuel cell.
Description of drawings
Fig. 1 is the structural representation of the utility model fuel cell composite gas diffusion layer.
Embodiment
Referring to Fig. 1, fuel cell composite gas diffusion layer of the present utility model, be the thin layer layered structural articles, comprise conventional gas diffusion layer 1 and additional gas diffusion layer 2, conventional gas diffusion layer 1 is made of one deck carbon paper 11 and the conductive carbon powder and the PTFE layer 12 that cover on face of carbon paper, and additional gas diffusion layer 2 covers the another side of carbon paper 11.Every square centimeter of hole that to be evenly distributed with 100-20000 aperture be the 10-300 micron on this additional gas diffusion layer 2.This additional gas diffusion layer can be made of conductive metal foil or conductive non-metals paper tinsel with fixing even hole.The conductive non-metals paper tinsel comprises the electrically conductive graphite paper tinsel, the preferred flexible graphite foil.
The TG653 material that the 30BC carbon paper that conventional gas diffusion layer in the utility model can adopt German SGL company to produce, additional gas diffusion layer can adopt United States advanced energy company (Advanced Energy TechnologyInc.) to produce.
The utility model composite gas diffusion layer is when being used as the gas diffusion layers of fuel cell, and surface coverage has conductive carbon powder to contact the catalyst layer of fuel cell electrode with the one side of PTFE layer.
Two of the utility model composite gas diffusion layers and a slice CCM (catalyst+film+catalyst) are made into electrode No. 1.Use two of additional gas diffusion layers in the utility model (TG653 that United States advanced energy company produces) (every square centimeter perforate 2500, percent opening is 5%) to be made into electrode No. 2 in addition separately with a slice CCM; Be made into electrode No. 3 with two of conventional gas diffusion layers and a slice CCM separately.Respectively three kinds of electrodes are tested after the graphite cake group of flow fields is dressed up battery with crawling, the result is as shown in table 1.
Table 1
| No. 1 electrode | No. 2 electrodes | No. 3 electrodes | |
| Battery performance | 0.6V， 950mA/cm 2 | 0.6V， 450mA/cm 2 | 0.6V， 850mA/cm 2 |
| Stability test (60 ℃ of operating temperatures, hydrogen and air gas import relative humidity 50%, operating pressure, 0/0psi) | Stable | Stable | Unstable |
As seen, the application of composite gas diffusion layer can improve fuel cell performance from the test correction data, improves the stability of battery operation.
Claims (5)
1, a kind of fuel cell composite gas diffusion layer, be the thin layer layered structural articles, comprise the conventional gas diffusion layer, this conventional gas diffusion layer is made of one deck carbon paper and the conductive carbon powder and the PTFE layer that cover on face of carbon paper, it is characterized in that: also comprise an additional gas diffusion layer with even fixing hole, this additional gas diffusion layer covers the another side of carbon paper.
2, fuel cell composite gas diffusion layer as claimed in claim 1 is characterized in that: the even fixing hole on the described additional gas diffusion layer is every square centimeter of 100-20000, and the aperture is the 10-300 micron, and percent opening is 0.1-30%.
3, fuel cell composite gas diffusion layer as claimed in claim 1 is characterized in that: described additional gas diffusion layer is made of the conductive foil with fixing even hole.
4, fuel cell composite gas diffusion layer as claimed in claim 3, it is characterized in that: described conductive foil comprises conductive metal foil and conductive non-metals paper tinsel.
5, fuel cell composite gas diffusion layer as claimed in claim 4, it is characterized in that: described conductive non-metals paper tinsel comprises the electrically conductive graphite paper tinsel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200437230U CN200965892Y (en) | 2006-07-07 | 2006-07-07 | Fuel battery composite gas-diffusion-layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200437230U CN200965892Y (en) | 2006-07-07 | 2006-07-07 | Fuel battery composite gas-diffusion-layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200965892Y true CN200965892Y (en) | 2007-10-24 |
Family
ID=38869911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200437230U Expired - Lifetime CN200965892Y (en) | 2006-07-07 | 2006-07-07 | Fuel battery composite gas-diffusion-layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200965892Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178275A (en) * | 2011-12-20 | 2013-06-26 | 财团法人工业技术研究院 | Bipolar plate and fuel cell |
| CN107026275A (en) * | 2016-02-01 | 2017-08-08 | 上海攀业氢能源科技有限公司 | A kind of part for improving battery operation stability |
| CN113718280A (en) * | 2021-08-31 | 2021-11-30 | 苏州清缘环保科技有限公司 | Gas diffusion electrode and method for producing same |
-
2006
- 2006-07-07 CN CNU2006200437230U patent/CN200965892Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178275A (en) * | 2011-12-20 | 2013-06-26 | 财团法人工业技术研究院 | Bipolar plate and fuel cell |
| CN107026275A (en) * | 2016-02-01 | 2017-08-08 | 上海攀业氢能源科技有限公司 | A kind of part for improving battery operation stability |
| CN107026275B (en) * | 2016-02-01 | 2019-12-31 | 上海攀业氢能源科技有限公司 | Component for improving battery operation stability |
| CN113718280A (en) * | 2021-08-31 | 2021-11-30 | 苏州清缘环保科技有限公司 | Gas diffusion electrode and method for producing same |
| CN113718280B (en) * | 2021-08-31 | 2024-04-26 | 苏州清氧环境科技有限公司 | Gas diffusion electrode and method for producing same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20071024 |
|
| EXPY | Termination of patent right or utility model |