CN106684394A - Surface modification method of proton-exchange membrane fuel cells' stainless steel bipolar plates - Google Patents
Surface modification method of proton-exchange membrane fuel cells' stainless steel bipolar plates Download PDFInfo
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- CN106684394A CN106684394A CN201510753644.2A CN201510753644A CN106684394A CN 106684394 A CN106684394 A CN 106684394A CN 201510753644 A CN201510753644 A CN 201510753644A CN 106684394 A CN106684394 A CN 106684394A
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- China
- Prior art keywords
- stainless steel
- exchange membrane
- bipolar plate
- membrane fuel
- proton exchange
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Classifications
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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
- H01M4/8875—Methods for shaping the electrode into free-standing bodies, like sheets, films or grids, e.g. moulding, hot-pressing, casting without support, extrusion without support
-
- 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 relates to a novel metal bipolar plate surface modification method in the field of proton-exchange membrane fuel cells. The modified bipolar plate is composed of two parts, namely a stainless steel matrix and a surface modification layer. The modification layer is deposited on the surface of the stainless steel matrix through ion plating and divided into a transition layer and an outermost layer. According to the invention, corrosion resistance of the stainless steel matrix can be further enhanced, and contact resistance between the bipolar plate and a diffusion layer material (carbon paper) is reduced. Processing can be realized by the mode of stamping, and mass specific power and volumetric specific power of stack assembling are raised.
Description
Technical field
The present invention relates to stainless steel double polar plate surface changes in a proton exchanging film fuel battery technical field
Property method.
Background technology
Proton Exchange Membrane Fuel Cells (PEMFC) is a kind of energy turn that chemical energy is converted into electric energy
Changing device., with hydrogen and oxygen as raw material, the reaction in the presence of catalyst generates water for it.Proton is handed over
Change membrane cell environmentally friendly, energy conversion efficiency is high, can quickly start, therefore, by complete
The extensive concern in the world.Additionally, it is in auto industry, spare emergent power source, dispersion power station and military affairs
Have broad application prospects Deng field.
Bipolar plates are one of critical components of Proton Exchange Membrane Fuel Cells, with the single pond of connection, are supported
The effects such as pile, offer gas flowfield, collected current, radiating, draining, it is therefore desirable to as double
The material of pole plate has that high mechanical strength, permeation rate are low, electrical conductivity is high, thermal conductivity good, it is corrosion-resistant,
The property such as low with carbon paper contact resistance, inexpensive.
In terms of movable application, it is desirable to which fuel cell pile has higher quality specific power and volume
Specific power, but in traditional proton exchange film fuel cell electric piling, graphite is the main of making bipolar plates
Material, due to the reason such as graphite air-tightness is not good, mechanical strength is low, fragility is big, causes tradition bipolar
Plate thickness is big, quality is heavy, intolerant to mechanical shock, difficulty of processing be big, high cost so that graphite is being moved
It is limited in dynamic formula application.Metal have higher electrical conductivity, preferable mechanical strength, air penetrability it is low,
Thermal conductivity is good, low cost, the features such as punch process can be carried out, be make bipolar plates potential material it
One, but there is the oxidative deactivation film of several nanometer thickness in the metal surface such as stainless steel so that between metal and carbon paper
Contact resistance it is excessive, in turn result in the larger ohmage of inside battery, this will significantly reduce stainless
When the metals such as steel are as bipolar plates, the output performance of pile.Therefore, what the metal such as stainless steel made is double
Polar board surface must carry out appropriate modification.At present Many researchers are heavy in matrix stainless steel surfaces
Product TiN coating, this significantly reduces the contact resistance between stainless steel and carbon paper, but TiN coating is steady
It is qualitative poor.Ho-Young Jung are prepared for 1 μm of gold plate on titanium plate surface, prevent passivation
The formation of layer, battery performance is preferable, but gold is expensive, it is difficult to realize that large-scale commercial should
With.B.Yang is prepared for the nitride of Cr by tropical resources in stainless steel surfaces, but film is discontinuous,
It is poor to the protectiveness of matrix.Fine and close, corrosion-resistant, good conductivity is prepared in metal bipolar plate surface simultaneously
And between carbon paper the little modified coating of contact resistance, then can improve the corrosion resistance of parent metal, reduce
The internal resistance of proton exchange film fuel cell electric piling, improves pile output performance.
The content of the invention
Present invention aims to existing proton exchange membrane fuel cell stainless steel bipolar plate surface
The deficiency of modification technology, there is provided a kind of surface of proton exchange membrane fuel cell stainless steel bipolar plate is modified
Method so as to which corrosion resistance is improved, the contact resistance between carbon paper is reduced, and meets proton exchange combustion
The demand for development of material battery high-quality specific power and high volumetric specific power.
The present invention is achieved through the following technical solutions：Stainless steel substrate carries out ultrasound Jing after mechanical grinding
Cleaning, is then changed in substrate surface by the bilayer that ion electroplating method deposits transition zone and outermost layer composition
Property layer, obtain the modified stainless steel fuel battery double plates in surface.
The stainless steel substrate, its thickness is 0.05mm～1mm.
The mechanical grinding, its sand paper used is 600 mesh～2000 mesh.
The transition zone, it is the one kind in Cr, Ti, Ni, Cu, Al, V, Co, Au, Ag etc.
Or it is various.
The outermost layer, it is the nitride and phase of one or more in Cr, Ti, Ni, Al, V
Answer the mixture of metal.
The ion plating, its vacuum is 1 × 10-2Pa～10Pa.
The ion plating, its deposition current is 10A～100A.
The ion plating, its sedimentation time is 10min～150min.
The stainless steel thickness that the present invention is selected is 0.05mm～1mm, and more ripe metallic plate can be used to process
Technique carries out the processing of the parts such as flow field.Transition metal has resistance to local corrosion ability strong, rises and intercepts
The effect of the deep development of corrosion, outermost layer has that resistivity is low, corrosion-resistant electricity is contacted between carbon paper
The little characteristic of resistance, therefore, the presence of modified layer so that under 140 newton thrust every square centimeter,
459 milliohm square centimeters of the contact resistance by most are reduced to 5.17 milliohm square centimeters,
177.8 microampere every square centimeter reductions of the corrosion current by most in 0.5 mole of every liter of sulfuric acid solution
Every square centimeter for 0.12 microampere, modified layer significantly reduces the contact resistance between stainless steel and carbon paper
And corrosion current, modified bipolar plates can improve the quality specific power of Proton Exchange Membrane Fuel Cells
And volumetric specific power.Modified layer price is relatively low, it is possible to decrease the cost of Proton Exchange Membrane Fuel Cells, fits
Close large-scale application.
Description of the drawings
Fig. 1 is to contact electricity between the modified stainless steel in embodiment 1316L stainless steel and surface and carbon paper
Resistance is with pressure change schematic diagram.
Fig. 2 is the modified stainless steel in embodiment 1316L stainless steel and surface at 0.5 mole per liter
Polarization curve schematic diagram in sulfuric acid solution.
Fig. 3 is the scanning electron microscope diagram of the embodiment of the present invention 1.
Specific embodiment
Embodiments of the invention are elaborated below in conjunction with the accompanying drawings：The present embodiment is with skill of the present invention
Implemented under premised on art scheme, but present disclosure is not limited solely to the following examples.
Embodiment 1：
The thick 316L corrosion resistant plates of 0.1mm are taken, the base material of 100mm × 150mm is cut to, 600 are used
Mesh～2000 mesh sand paper is polished step by step；It is cleaned by ultrasonic 30min with acetone and water；It is evacuated to 1 ×
10-3Pa～1 × 10-2Pa, it is depositing Ti transition zone between 1Pa～1.5Pa to be filled with argon gas and adjust pressure,
Electric current 80A, time 15min；It is between 0.8Pa～1.2Pa, to open Cr to be passed through nitrogen adjustment pressure
Target, deposits outermost layer, electric current 70A, time 40min.
Embodiment 2：
The thick 316L corrosion resistant plates of 0.5mm are taken, the base material of 100mm × 150mm is cut to, 600 are used
Mesh～2000 mesh sand paper is polished step by step；It is cleaned by ultrasonic 30min with acetone and water；It is evacuated to 3 ×
10-3Pa～7 × 10-3Pa, it is between 0.8Pa～1.5Pa, to deposit V transition zones to be filled with argon gas and adjust pressure,
Electric current 85A, time 20min；It is between 1Pa～1.5Pa, to open Ti targets to be passed through nitrogen adjustment pressure,
Deposition outermost layer, electric current 85A, time 20min.
Embodiment 3：
The thick 316L corrosion resistant plates of 1mm are taken, the base material of 100mm × 150mm is cut to, 600 mesh are used
～2000 mesh sand paper are polished step by step；It is cleaned by ultrasonic 30min with acetone and water；It is evacuated to 5 × 10-3Pa～9
×10-3Pa, be filled with argon gas adjust pressure be 1.8Pa～2.2Pa between, depositing Al transition zone, electric current
100A, time 15min；It is between 1.5Pa～1.9Pa, to open V targets to be passed through nitrogen adjustment pressure,
Deposition outermost layer, electric current 100A, time 25min.
Present invention process parameter bound value may all realize the present invention, enforcement numerous to list herein
Example.
Claims (8)
1. a kind of proton exchange membrane fuel cell stainless steel bipolar plate surface modifying method, it is characterised in that：
Modified layer is prepared on stainless steel substrate surface using ion electroplating method, modified bipolar plate of stainless steel is obtained；
The modified layer is made up of the transition zone and outermost layer near substrate surface.
2. proton exchange membrane fuel cell stainless steel bipolar plate surface according to claim 1 is modified
Method, is characterized in that：The transition zone be between substrate surface and outermost layer, its material be Cr,
One or two or more kinds in Ti, Ni, Cu, Al, V, Co, Au, Ag.
3. proton exchange membrane fuel cell stainless steel bipolar plate surface according to claim 1 is modified
Method, is characterized in that：The outermost material is the one kind in Cr, Ti, Ni, Al, V or two kinds
Metal nitride above.
4. proton exchange membrane fuel cell stainless steel bipolar plate surface according to claim 1 is modified
Method, is characterized in that：The stainless steel substrate is corrosion resistant plate, and its thickness is in 0.05mm～1mm.
5. proton exchange membrane fuel cell stainless steel bipolar plate surface according to claim 1 is modified
Method, is characterized in that：The ion plating process, its vacuum is 1 × 10-2Pa～10Pa.
6. proton exchange membrane fuel cell stainless steel bipolar plate surface according to claim 1 is modified
Method, is characterized in that：The ion plating, its deposition current is 10A～100A.
7. proton exchange membrane fuel cell stainless steel bipolar plate surface according to claim 1 is modified
Method, is characterized in that：The ion plating, its sedimentation time is 10min～150min.
8. proton exchange membrane fuel cell stainless steel bipolar plate surface according to claim 1 is modified
Method, is characterized in that：The thickness of the modified layer is 100nm～30 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510753644.2A CN106684394A (en) | 2015-11-06 | 2015-11-06 | Surface modification method of proton-exchange membrane fuel cells' stainless steel bipolar plates |
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| CN201510753644.2A CN106684394A (en) | 2015-11-06 | 2015-11-06 | Surface modification method of proton-exchange membrane fuel cells' stainless steel bipolar plates |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109728307A (en) * | 2017-10-27 | 2019-05-07 | 中国科学院大连化学物理研究所 | A kind of preparation and bipolar plates and application of the metal double polar plates based on carbon film modification |
| CN109852932A (en) * | 2019-02-20 | 2019-06-07 | 金华市畔星科技有限公司 | Hydrogen fuel battery metal bi-polar plate and preparation method thereof |
| CN110061257A (en) * | 2018-06-28 | 2019-07-26 | 南方科技大学 | Metal Substrate bipolar plates and preparation method thereof for PEMFC |
| CN110699647A (en) * | 2019-10-31 | 2020-01-17 | 宇石能源(南通)有限公司 | Method for modifying stainless steel bipolar plate of fuel cell |
| CN111471939A (en) * | 2020-04-09 | 2020-07-31 | 大连理工大学 | High Ni stainless steel suitable for proton exchange membrane fuel cell bipolar plate |
| CN111900426A (en) * | 2020-07-29 | 2020-11-06 | 上海交通大学 | Fuel cell bipolar plate anticorrosive coating and preparation method thereof |
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| CN101092688A (en) * | 2007-05-28 | 2007-12-26 | 大连理工大学 | Ion plating modified method for bipolar plate of stainless steel for fuel cell in type of proton exchange membrane |
| CN101710620A (en) * | 2009-12-11 | 2010-05-19 | 江苏新源动力有限公司 | Proton exchange membrane fuel cell stainless steel bipolar plate and modification method thereof |
| CN102723499A (en) * | 2012-06-07 | 2012-10-10 | 上海交通大学 | Metal bipolar plate of fuel cell with surface plating layers and preparation method thereof |
| CN102800871A (en) * | 2012-08-14 | 2012-11-28 | 上海交通大学 | Fuel cell metal bipolar plate carbon chromium gradient coating and preparation method |
| CN102931421A (en) * | 2012-11-06 | 2013-02-13 | 上海交通大学 | Fuel cell metal bipolar plate with conductive and anti-corrosion plating and preparation method thereof |
-
2015
- 2015-11-06 CN CN201510753644.2A patent/CN106684394A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101092688A (en) * | 2007-05-28 | 2007-12-26 | 大连理工大学 | Ion plating modified method for bipolar plate of stainless steel for fuel cell in type of proton exchange membrane |
| CN101710620A (en) * | 2009-12-11 | 2010-05-19 | 江苏新源动力有限公司 | Proton exchange membrane fuel cell stainless steel bipolar plate and modification method thereof |
| CN102723499A (en) * | 2012-06-07 | 2012-10-10 | 上海交通大学 | Metal bipolar plate of fuel cell with surface plating layers and preparation method thereof |
| CN102800871A (en) * | 2012-08-14 | 2012-11-28 | 上海交通大学 | Fuel cell metal bipolar plate carbon chromium gradient coating and preparation method |
| CN102931421A (en) * | 2012-11-06 | 2013-02-13 | 上海交通大学 | Fuel cell metal bipolar plate with conductive and anti-corrosion plating and preparation method thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109728307A (en) * | 2017-10-27 | 2019-05-07 | 中国科学院大连化学物理研究所 | A kind of preparation and bipolar plates and application of the metal double polar plates based on carbon film modification |
| CN110061257A (en) * | 2018-06-28 | 2019-07-26 | 南方科技大学 | Metal Substrate bipolar plates and preparation method thereof for PEMFC |
| CN109852932A (en) * | 2019-02-20 | 2019-06-07 | 金华市畔星科技有限公司 | Hydrogen fuel battery metal bi-polar plate and preparation method thereof |
| CN110699647A (en) * | 2019-10-31 | 2020-01-17 | 宇石能源(南通)有限公司 | Method for modifying stainless steel bipolar plate of fuel cell |
| CN111471939A (en) * | 2020-04-09 | 2020-07-31 | 大连理工大学 | High Ni stainless steel suitable for proton exchange membrane fuel cell bipolar plate |
| CN111900426A (en) * | 2020-07-29 | 2020-11-06 | 上海交通大学 | Fuel cell bipolar plate anticorrosive coating and preparation method thereof |
| CN111900426B (en) * | 2020-07-29 | 2022-03-15 | 上海交通大学 | Fuel cell bipolar plate anticorrosive coating and preparation method thereof |
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Application publication date: 20170517 |