CN106654296A - Preparation method of hydrophobic and oxygen-permeable proton exchange membrane fuel battery cathode - Google Patents
Preparation method of hydrophobic and oxygen-permeable proton exchange membrane fuel battery cathode Download PDFInfo
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- CN106654296A CN106654296A CN201710116368.8A CN201710116368A CN106654296A CN 106654296 A CN106654296 A CN 106654296A CN 201710116368 A CN201710116368 A CN 201710116368A CN 106654296 A CN106654296 A CN 106654296A
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- Prior art keywords
- fuel battery
- proton exchange
- cathode
- preparation
- oxygen
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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
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/8605—Porous electrodes
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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
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/8647—Inert electrodes with catalytic activity, e.g. for fuel cells consisting of more than one material, e.g. consisting of composites
- H01M4/8657—Inert electrodes with catalytic activity, e.g. for fuel cells consisting of more than one material, e.g. consisting of composites layered
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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
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
- H01M4/8803—Supports for the deposition of the catalytic active composition
- H01M4/8807—Gas diffusion layers
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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
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
- H01M4/8817—Treatment of supports before application of the catalytic active composition
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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
- H01M8/10—Fuel cells with solid electrolytes
- H01M2008/1095—Fuel cells with polymeric electrolytes
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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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Composite Materials (AREA)
- Inert Electrodes (AREA)
- Fuel Cell (AREA)
Abstract
The invention relates to a preparation method of a hydrophobic and oxygen-permeable proton exchange membrane fuel battery cathode. The preparation method specifically comprises the steps of spraying a layer of hydrophobic and oxygen-permeable membrane containing fluorinated siloxane between a cathode Pt catalyst layer and a gas diffusion layer, and compounding the two layers to form the cathode. As the fluorinated siloxane has the characteristics of selectively allowing oxygen molecules to permeate and blocking most of other gas in air, the proton exchange membrane fuel battery cathode prepared by adopting the method can increase the cathode oxygen content; when used for a hydrogen-air fuel battery, the fuel battery cathode can also achieve the same power generation efficiency under lower cathode air feeding pressure and flow than the conventional cathode. The preparation method has the advantage that the prepared cathode enables a cathode Pt catalyst to gain relatively high oxygen supply under conditions of conventional cathode air feeding pressure and flow.
Description
Technical field
The present invention relates to fuel cell manufacture field, relates in particular to fuel battery cathode with proton exchange film and prepares skill
Art, is a kind of preparation method of hydrophobic oxygen flow fuel battery cathode with proton exchange film.
Background technology
For the Proton Exchange Membrane Fuel Cells with hydrogen as fuel, the electrochemical catalysis activity of fuel cell is main by the moon
Pole restricts, this is because reduction reaction of the Pt catalyst to cathode oxygen（ORR）Catalysis activity is low.In order to improve whole pile
Power density, rise high catalyst operating temperature be frequently with a kind of method, but the operating temperature of pile receive PEM
The restriction of heat stability, generally no more than 65 DEG C.Another kind of method is to increase the oxygen supply amount of negative electrode or improve partial pressure of oxygen.
For the hydrogen with air as oxygen source-sky Proton Exchange Membrane Fuel Cells, increase oxygen supply amount means to need auxiliary in negative electrode
With a big flow blower fan, the power consumption of aid system is this increases not only, can also cause a series of of pile water management to ask
Topic.Improving cathode inlet pressure can improve partial pressure of oxygen, but due to the oxygen content in air only 21%, increase cathode inlet pressure
Power is extremely limited to the effect for improving partial pressure of oxygen, but considerably increases the risk of proton exchange film rupture.
The content of the invention
In order to solve the above problems, the present invention proposes a kind of preparation side of hydrophobic oxygen flow fuel battery cathode with proton exchange film
Method, can make obtained negative electrode in the case of conventional cathodes admission pressure and flow, obtain negative electrode Pt catalyst higher
The oxygen supply of concentration.
Technical scheme：
A kind of preparation method of hydrophobic oxygen flow fuel battery cathode with proton exchange film, is characterized in particular in：A kind of hydrophobic oxygen flow proton is handed over
Membrane fuel battery cathod is changed, is made up of Pt catalyst layers and gas diffusion layers.On the gas diffusion with Pt catalyst layer contacts
Side coating fluorinated siloxane solution, or the mixed solution of fluorinated siloxane and polypropylene, politef and polysulfones treats
Non-porous or micropore oxygen-permeable membrane is formed after solvent volatilization in the side of gas diffusion layers.This side is fitted with Pt catalyst layers
Form the hydrophobic oxygen flow fuel battery cathode with proton exchange film.Non-porous or micropore oxygen-permeable membrane preparation method：By fluorine
Change siloxane solution, or fluorinated siloxane is coated in described gas with the mixed solution of polypropylene, politef and polysulfones
With the side of Pt catalyst layer contacts on body diffused layer, solvent is then removed.
In the above-mentioned methods, fluorinated siloxane is no less than 50% matter to a in the chemical constituent of obtained oxygen-permeable membrane
Amount percent.
In a, fluorinated siloxane contains one or many such as perfluoroalkyl, perfluoroether or/and perfluoropolyether group.
In the process, by changing the air infiltration permeable membrane described in a in other chemical constituents species and contain
Amount, adjusts the hydrophobicity of made negative electrode.
The hydrophobicity of made negative electrode is characterized with the contact angle of water.
It is an advantage of the invention that can make obtained negative electrode in the case of conventional cathodes admission pressure and flow, the moon is made
Pole Pt catalyst obtains higher oxygen supply.Add one layer of hydrophobic oxygen permeation membrane between cathode catalysis layer and gas diffusion layers, this
Tunic passes through optionally the oxygen in air, reach Catalytic Layer, and the resistance that other gases pass through increases, transmitance
It is low.Simultaneously the film also has adjustable hydrophobicity performance, the water that negative electrode is produced can be prevented to flood gas diffusion layers, it is ensured that gas
Road it is unimpeded.The present invention can reduce hydrogen-requirement of the sky proton exchange membrane fuel cell power generation system to negative electrode air intake blower fan.
Specific embodiment
A kind of preparation method of hydrophobic oxygen flow fuel battery cathode with proton exchange film, expands in negative electrode Pt catalyst layers and gas
One layer of hydrophobic oxygen permeation membrane containing fluorinated siloxane is sprayed between scattered layer, then two-layer is compounded to form negative electrode.Due to being fluorinated silica
Alkane has the characteristic for selectively allowing for oxygen molecule transmission, and prevents most of other gases in air, using the inventive method
The fuel battery cathode with proton exchange film of preparation can improve negative electrode oxygen content, can be than passing when for hydrogen-air fuel cell
System negative electrode adopts relatively low negative electrode air intake blast and flow, and reaches same generating efficiency.Expand in cathode catalysis layer and gas
One layer of hydrophobic oxygen permeation membrane, this tunic is added to pass through optionally the oxygen in air between scattered layer, arrival Catalytic Layer, and its
The resistance increase that his gas passes through, transmitance is low.Simultaneously the film also has adjustable hydrophobicity performance, and negative electrode can be prevented to produce
Water gas diffusion layers are flooded, it is ensured that gas circuit it is unimpeded.The present invention can reduce hydrogen-sky Proton Exchange Membrane Fuel Cells and generate electricity
Requirement of the system to negative electrode air intake blower fan.
Embodiment 1
By 20wt% trifluoro propyl methylsiloxanes（PTFPMS）Solution, with spray gun contacting with catalyst for gas diffusion layers is sprayed on
Side, after infrared drying, with Proton Exchange Membrane Fuel Cells CCM（catalyst coated membrane）Cathode side enter
Row heat is compound, forms hydrophobic oxygen flow fuel battery cathode with proton exchange film.
Claims (6)
1. a kind of preparation method of hydrophobic oxygen flow fuel battery cathode with proton exchange film, it is characterised in that the hydrophobic oxygen flow proton
Exchange film fuel battery negative electrode, is made up of Pt catalyst layers and gas diffusion layers, is connect with Pt catalyst layers on the gas diffusion
Tactile side coats non-porous or micropore oxygen-permeable membrane.
2. the preparation method of a kind of hydrophobic oxygen flow fuel battery cathode with proton exchange film according to claim 1, its feature
It is：Non-porous or micropore oxygen-permeable membrane preparation method：By fluorinated siloxane solution, or fluorinated siloxane and polypropylene,
The mixed solution of politef and polysulfones is coated in the side on described gas diffusion layers with Pt catalyst layer contacts, then
Remove solvent.
3. the preparation method of a kind of hydrophobic oxygen flow fuel battery cathode with proton exchange film according to claim 2, its feature
It is：In the above-mentioned methods, fluorinated siloxane is no less than in obtained non-porous or micropore oxygen-permeable membrane chemical constituent
50% mass percent.
4. a kind of preparation method of hydrophobic oxygen flow fuel battery cathode with proton exchange film according to claim 2, it is special
Levying is：Described fluorinated siloxane contains one or many such as perfluoroalkyl, perfluoroether or/and perfluoropolyether group.
5. the preparation method of a kind of hydrophobic oxygen flow fuel battery cathode with proton exchange film described according to Claims 2 or 3,
It is characterized in that：When preparing non-porous or micropore oxygen-permeable membrane, gained hydrophobic oxygen flow fuel battery cathode with proton exchange film is hated
Aqueouss, are adjusted by the species and content of other chemical constituents in the non-porous or micropore oxygen-permeable membrane in change methods described
Section.
6. the preparation method of a kind of hydrophobic oxygen flow fuel battery cathode with proton exchange film described according to claim 5, its
It is characterized in that：The hydrophobicity of the hydrophobic oxygen flow fuel battery cathode with proton exchange film is characterized with the contact angle of water.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710116368.8A CN106654296B (en) | 2017-03-01 | 2017-03-01 | A kind of preparation method of hydrophobic oxygen flow fuel battery cathode with proton exchange film |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710116368.8A CN106654296B (en) | 2017-03-01 | 2017-03-01 | A kind of preparation method of hydrophobic oxygen flow fuel battery cathode with proton exchange film |
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| CN106654296A true CN106654296A (en) | 2017-05-10 |
| CN106654296B CN106654296B (en) | 2019-11-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111725523A (en) * | 2020-06-04 | 2020-09-29 | 浙江高成绿能科技有限公司 | Thin-layer hydrophobic fuel cell membrane electrode and preparation method thereof |
| CN111900428A (en) * | 2020-06-22 | 2020-11-06 | 浙江高成绿能科技有限公司 | Fuel cell stack with high water drainage capacity and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104577138A (en) * | 2014-12-12 | 2015-04-29 | 浙江工业大学 | Direct methanol fuel cell membrane electrode structure and preparation method thereof |
-
2017
- 2017-03-01 CN CN201710116368.8A patent/CN106654296B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104577138A (en) * | 2014-12-12 | 2015-04-29 | 浙江工业大学 | Direct methanol fuel cell membrane electrode structure and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111725523A (en) * | 2020-06-04 | 2020-09-29 | 浙江高成绿能科技有限公司 | Thin-layer hydrophobic fuel cell membrane electrode and preparation method thereof |
| CN111900428A (en) * | 2020-06-22 | 2020-11-06 | 浙江高成绿能科技有限公司 | Fuel cell stack with high water drainage capacity and preparation method thereof |
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| Publication number | Publication date |
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| CN106654296B (en) | 2019-11-22 |
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