CN106876743A - A kind of fuel battery gas diffusion layer structure - Google Patents
A kind of fuel battery gas diffusion layer structure Download PDFInfo
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- CN106876743A CN106876743A CN201710156824.1A CN201710156824A CN106876743A CN 106876743 A CN106876743 A CN 106876743A CN 201710156824 A CN201710156824 A CN 201710156824A CN 106876743 A CN106876743 A CN 106876743A
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- layer structure
- gas diffusion
- diffusion layer
- fuel battery
- metallic fiber
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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
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
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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
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0206—Metals or alloys
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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
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0223—Composites
- H01M8/0226—Composites in the form of mixtures
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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
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0223—Composites
- H01M8/0228—Composites in the form of layered or coated products
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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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- Life Sciences & Earth Sciences (AREA)
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- Manufacturing & Machinery (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Inert Electrodes (AREA)
Abstract
The invention discloses a kind of fuel battery gas diffusion layer structure, its thickness is 3.0~5.0mm, including a basalis and a microporous layers, the side of basalis has gas flow, opposite side is connected with microporous layers, and the material of basalis is metal fiber felt, has copper Graphene complex phase film in microporous layers.Fuel battery gas diffusion layer structure of the invention compared with prior art, with high mechanical strength, drainage, gas permeability, the low advantage of contact resistance.
Description
Technical field
The invention belongs to field of fuel cell technology, and in particular to a kind of fuel battery gas diffusion layer structure.
Background technology
Proton Exchange Membrane Fuel Cells grinds as various countries in recent years as a kind of efficient, environmentally friendly TRT
Study carefully the focus of exploitation.Its core component membrane electrode three-in-one (MEA) is generally led to by gas diffusion layers, Catalytic Layer and PEM
Heat pressing process is crossed to be prepared from.Gas diffusion layers are made up of conductive porous material, play support Catalytic Layer, collected current, biography
The multiple action such as conductive gas and discharge water, realizes the reallocation of reacting gas and product water between flow field and Catalytic Layer, is
Influence one of critical component of electrode performance.Preferable gas diffusion layers should meet 3 conditions：It is good drainage, good
Gas permeability and good electric conductivity.
Gas diffusion layers are generally made up of basalis and microporous layers.Basalis is usually using porous carbon paper, carbon cloth, and it is thick
About 100-400 μm of degree, it mainly plays a part of to support microporous layers and Catalytic Layer.Microporous layers are typically to improvement basalis
Pore structure and its surface make one layer of carbon dust layer, thickness is about 10-100 μm, usually by after the smooth treatment of basalis
Prepared by techniques such as silk-screen, blade coating, coating, sputterings on its surface, its Main Function is reduced between Catalytic Layer and basalis
Contact resistance, gas and water is reallocated, prevent electrode catalyst layer " water logging ", while preventing Catalytic Layer in preparation process
In leak into basalis.Additionally, the research that wire netting is used as gas diffusion layers base material also has been reported, but it uses smooth
Wire makes wire netting and causes that basalis is poor with the contact of microporous layers, the too high in resistance of gas diffusion layers.Gas diffusion
Passage is served as by the duct of the hydrophobicity processed by hydrophobic, and polytetrafluoroethylene (PTFE) (PTFE) is conventional hydrophober, and without
Serve as the transmission channels of product water in the hydrophilic duct of hydrophobic treatment.Gas diffusion layers prepared by the method are higher due to price
And technology is more by foreign countries' monopolization, causes internal fuel cell gas diffusion layer commercial application to be made slow progress.
The content of the invention
It is an object of the invention to overcome prior art defect, there is provided a kind of fuel battery gas diffusion layer structure.
Technical scheme is as follows：
A kind of fuel battery gas diffusion layer structure, thickness is 3.0~5.0mm, including a basalis and a microporous layers, base
The side of bottom has gas flow, and opposite side is connected with microporous layers, and the material of basalis is metal fiber felt, is had in microporous layers
There is copper-graphite alkene complex phase film；Its preparation method comprises the following steps：
(1) cutting prepares metallic fiber, and the metallic fiber is filled into mould, and Low Temperature Solid-Phase sintering process is used after pressurization
Preparation forms metal fiber felt；
(2) above-mentioned metal fiber felt is immersed to be taken out after molten state polytetrafluoroethylene (PTFE) and naturally cools to room temperature formation metal fibre
Dimension felt-ptfe composite, then goes out gas flow, Ran Hou under the protection of polytetrafluoroethylene (PTFE) in one side milling
Hydrophobicity treatment is completed while polytetrafluoroethylene (PTFE) is partly removed under vacuum high-temperature sintering, obtaining side has the base of gas flow
Bottom；
(3) by the opposite side of above-mentioned basalis immersion temperature be carry out in 45~55 DEG C of copper plating baths Electroless copper 25~
35min, is then cleaned by ultrasonic in ethanol, is then immersed in precipitating graphite in the graphene dispersing solution that concentration is 0.1~0.4wt%
Alkene 25~35min of piece, obtains copper-graphite alkene complex phase film；
(4) repeat step (3) is until the copper-graphite alkene complex phase film of acquisition appointed thickness, is obtained the microporous layers.
In a preferred embodiment of the invention, the thickness of the microporous layers is 0.05~0.15mm.
In a preferred embodiment of the invention, the depth of the gas flow is 2.5~3.0mm.
In a preferred embodiment of the invention, the equivalent diameter of the metallic fiber is 0.01~0.03mm.
In a preferred embodiment of the invention, the length of the metallic fiber is 10~15mm.
In a preferred embodiment of the invention, the Low Temperature Solid-Phase sintering process is specially：Less than the metal
Vacuum-sintering is carried out to the metallic fiber after pressurization at a temperature of 30~50 DEG C of the fusing point of fiber, by violent in metallic fiber
Molecule diffusion motion be connected with periphery material.
In a preferred embodiment of the invention, the particle diameter of the copper particle for being obtained in the Electroless copper is about
0.03~0.07mm.
In a preferred embodiment of the invention, the graphene film thickness is about 0.02~0.05mm.
Beneficial effects of the present invention：Fuel battery gas diffusion layer structure of the invention compared with prior art, with machine
Tool intensity is high, drainage, gas permeability, the low advantage of contact resistance.
Brief description of the drawings
Fig. 1 is the structural representation of the fuel battery gas diffusion layer structure of the embodiment of the present invention 1.
Fig. 2 is the stereoscan photograph of the metallic fiber in the embodiment of the present invention 1.
Fig. 3 is the outside drawing of the metal fiber felt in the embodiment of the present invention 1.
Specific embodiment
Technical scheme is further detailed and described below by way of specific embodiment combination accompanying drawing.
Embodiment 1：
As shown in figure 1, a kind of fuel battery gas diffusion layer structure, thickness is 3.0~5.0mm, including the He of a basalis 1
One thickness is the microporous layers 2 of 0.05~0.15mm, and the side of basalis 1 has the gas flow 11 that depth is 2.5~3.0mm,
Opposite side is connected with microporous layers 2, and the material of basalis 1 is metal fiber felt, has copper-graphite alkene complex phase film in microporous layers 2；Its
Preparation method comprises the following steps：
(1) cutting prepares metallic fiber, the metallic fiber is filled to the rectangle of 40.00mm × 30.00mm × 4.35mm
In mould, prepare to form metal fiber felt as shown in Figure 3 using Low Temperature Solid-Phase sintering process after pressurization, above-mentioned metallic fiber is as schemed
Shown in 2, its equivalent diameter is 0.01~0.03mm, and length is 10~15mm；The Low Temperature Solid-Phase sintering process is specially：It is being less than
Vacuum-sintering is carried out to the metallic fiber after pressurization at a temperature of 30~50 DEG C of the fusing point of the metallic fiber, by metallic fiber
In violent molecule diffusion motion be connected with periphery material；
(2) above-mentioned metal fiber felt is immersed to be taken out after molten state polytetrafluoroethylene (PTFE) and naturally cools to room temperature formation metal fibre
Dimension felt-ptfe composite, then goes out gas flow, Ran Hou under the protection of polytetrafluoroethylene (PTFE) in one side milling
Hydrophobicity treatment is completed while polytetrafluoroethylene (PTFE) is partly removed under vacuum high-temperature sintering, obtaining side has the base of gas flow
Bottom；
(3) by the opposite side of above-mentioned basalis immersion temperature be carry out in 45~55 DEG C of copper plating baths Electroless copper 25~
35min, is then cleaned by ultrasonic in ethanol, is then immersed in precipitating graphite in the graphene dispersing solution that concentration is 0.1~0.4wt%
Alkene 25~35min of piece, obtains copper-graphite alkene complex phase film；The particle diameter of the copper particle obtained in above-mentioned Electroless copper is about
0.03~0.07mm, the thickness of above-mentioned graphene film is 0.02~0.05mm；
(4) repeat step (3) is until the copper-graphite alkene complex phase film of acquisition appointed thickness, is obtained the microporous layers.
The above, only presently preferred embodiments of the present invention, therefore can not according to this limit the scope of present invention implementation, i.e.,
The equivalence changes made according to the scope of the claims of the present invention and description and modification, all should still belong in the range of the present invention covers.
Claims (8)
1. a kind of fuel battery gas diffusion layer structure, it is characterised in that：Thickness is 3.0~5.0mm, including a basalis and one
Microporous layers, the side of basalis has gas flow, and opposite side is connected with microporous layers, and the material of basalis is metal fiber felt,
There is copper-graphite alkene complex phase film in microporous layers；Its preparation method comprises the following steps：
(1) cutting prepares metallic fiber, and the metallic fiber is filled into mould, is prepared using Low Temperature Solid-Phase sintering process after pressurization
Form metal fiber felt；
(2) above-mentioned metal fiber felt is immersed to be taken out after molten state polytetrafluoroethylene (PTFE) and naturally cools to room temperature formation metallic fiber
Felt-ptfe composite, then goes out gas flow, then true under the protection of polytetrafluoroethylene (PTFE) in one side milling
Hydrophobicity treatment is completed while polytetrafluoroethylene (PTFE) is partly removed under empty high temperature sintering, obtaining side has the substrate of gas flow
Layer；
(3) by the opposite side of above-mentioned basalis immersion temperature be carry out in 45~55 DEG C of copper plating baths Electroless copper 25~
35min, is then cleaned by ultrasonic in ethanol, is then immersed in precipitating graphite in the graphene dispersing solution that concentration is 0.1~0.4wt%
Alkene 25~35min of piece, obtains copper-graphite alkene complex phase film；
(4) repeat step (3) is until the copper-graphite alkene complex phase film of acquisition appointed thickness, is obtained the microporous layers.
2. a kind of fuel battery gas diffusion layer structure as claimed in claim 1, it is characterised in that：The thickness of the microporous layers
It is 0.05~0.15mm.
3. a kind of fuel battery gas diffusion layer structure as claimed in claim 1, it is characterised in that：The depth of the gas flow
It is 2.5~3.0mm to spend.
4. a kind of fuel battery gas diffusion layer structure as claimed in claim 1, it is characterised in that：The metallic fiber work as
Measure a diameter of 0.01~0.03mm.
5. a kind of fuel battery gas diffusion layer structure as claimed in claim 1, it is characterised in that：The length of the metallic fiber
It is 10~15mm to spend.
6. a kind of fuel battery gas diffusion layer structure as claimed in claim 1, it is characterised in that：The Low Temperature Solid-Phase sintering
Method is specially：At a temperature of 30~50 DEG C of the fusing point less than the metallic fiber to pressurization after metallic fiber carry out vacuum burning
Knot, is connected by the violent molecule diffusion motion in metallic fiber with periphery material.
7. a kind of fuel battery gas diffusion layer structure as claimed in claim 1, it is characterised in that：The Electroless copper
The particle diameter of the copper particle of middle acquisition is about 0.03~0.07mm.
8. a kind of fuel battery gas diffusion layer structure as claimed in claim 1, it is characterised in that：The graphene film thickness
About 0.02~0.05mm.
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| CN201710156824.1A CN106876743B (en) | 2017-03-16 | 2017-03-16 | A kind of fuel battery gas diffusion layer structure |
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| CN201710156824.1A CN106876743B (en) | 2017-03-16 | 2017-03-16 | A kind of fuel battery gas diffusion layer structure |
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| CN106876743B CN106876743B (en) | 2019-07-23 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107293765A (en) * | 2017-07-28 | 2017-10-24 | 韦德永 | A kind of fuel battery gas diffusion layer structure |
| CN109898362A (en) * | 2019-02-28 | 2019-06-18 | 华南理工大学 | A kind of high-performance carbon fibre paper of non-polymer binder and preparation method thereof |
| CN110061256A (en) * | 2019-03-16 | 2019-07-26 | 洛阳师范学院 | A kind of diffusion layer structure of fuel cell |
| CN110492124A (en) * | 2019-07-17 | 2019-11-22 | 珠海冠宇电池有限公司 | A kind of high conductivity hydrophobic gas diffusion layer and preparation method thereof |
| CN111540921A (en) * | 2020-04-21 | 2020-08-14 | 南京格致高新环保技术有限公司 | Fuel cell gas diffusion layer integrated with flow field and preparation method thereof |
| CN114899417A (en) * | 2022-04-28 | 2022-08-12 | 一汽解放汽车有限公司 | Fuel cell gas diffusion layer and preparation method thereof |
| CN115663211A (en) * | 2022-11-11 | 2023-01-31 | 上海氢晨新能源科技有限公司 | Gas diffusion layer and fuel cell |
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| CN102082277A (en) * | 2010-12-24 | 2011-06-01 | 上海交通大学 | Metal gas diffusion layer used for fuel cell and preparation method thereof |
| WO2014030553A1 (en) * | 2012-08-24 | 2014-02-27 | 東レ株式会社 | Gas-diffusion electrode base material for fuel cell |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101662031A (en) * | 2008-08-04 | 2010-03-03 | 通用汽车环球科技运作公司 | Gas diffusion layer with lower gas diffusivity |
| CN102082277A (en) * | 2010-12-24 | 2011-06-01 | 上海交通大学 | Metal gas diffusion layer used for fuel cell and preparation method thereof |
| WO2014030553A1 (en) * | 2012-08-24 | 2014-02-27 | 東レ株式会社 | Gas-diffusion electrode base material for fuel cell |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107293765A (en) * | 2017-07-28 | 2017-10-24 | 韦德永 | A kind of fuel battery gas diffusion layer structure |
| CN109898362A (en) * | 2019-02-28 | 2019-06-18 | 华南理工大学 | A kind of high-performance carbon fibre paper of non-polymer binder and preparation method thereof |
| CN110061256A (en) * | 2019-03-16 | 2019-07-26 | 洛阳师范学院 | A kind of diffusion layer structure of fuel cell |
| CN110492124A (en) * | 2019-07-17 | 2019-11-22 | 珠海冠宇电池有限公司 | A kind of high conductivity hydrophobic gas diffusion layer and preparation method thereof |
| CN110492124B (en) * | 2019-07-17 | 2020-11-13 | 珠海冠宇电池股份有限公司 | High-conductivity hydrophobic gas diffusion layer and preparation method thereof |
| CN111540921A (en) * | 2020-04-21 | 2020-08-14 | 南京格致高新环保技术有限公司 | Fuel cell gas diffusion layer integrated with flow field and preparation method thereof |
| CN114899417A (en) * | 2022-04-28 | 2022-08-12 | 一汽解放汽车有限公司 | Fuel cell gas diffusion layer and preparation method thereof |
| CN114899417B (en) * | 2022-04-28 | 2023-12-29 | 一汽解放汽车有限公司 | Fuel cell gas diffusion layer and preparation method thereof |
| CN115663211A (en) * | 2022-11-11 | 2023-01-31 | 上海氢晨新能源科技有限公司 | Gas diffusion layer and fuel cell |
| CN115663211B (en) * | 2022-11-11 | 2023-09-29 | 上海氢晨新能源科技有限公司 | Gas diffusion layer and fuel cell |
| WO2024098971A1 (en) * | 2022-11-11 | 2024-05-16 | 上海氢晨新能源科技有限公司 | Gas diffusion layer and fuel cell |
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