CN115377447A - Fuel cell titanium bipolar plate and preparation method thereof - Google Patents
Fuel cell titanium bipolar plate and preparation method thereof Download PDFInfo
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- CN115377447A CN115377447A CN202210795286.1A CN202210795286A CN115377447A CN 115377447 A CN115377447 A CN 115377447A CN 202210795286 A CN202210795286 A CN 202210795286A CN 115377447 A CN115377447 A CN 115377447A
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 89
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 89
- 239000010936 titanium Substances 0.000 title claims abstract description 89
- 239000000446 fuel Substances 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 40
- 239000000376 reactant Substances 0.000 claims abstract description 36
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000000835 fiber Substances 0.000 claims abstract description 30
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 28
- 239000011248 coating agent Substances 0.000 claims abstract description 23
- 238000000576 coating method Methods 0.000 claims abstract description 23
- 238000005260 corrosion Methods 0.000 claims abstract description 13
- 230000007797 corrosion Effects 0.000 claims abstract description 13
- 230000017525 heat dissipation Effects 0.000 claims abstract description 12
- 239000002131 composite material Substances 0.000 claims abstract description 9
- 229910003481 amorphous carbon Inorganic materials 0.000 claims abstract description 8
- 230000002787 reinforcement Effects 0.000 claims abstract description 6
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims abstract description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 4
- 239000010937 tungsten Substances 0.000 claims abstract description 4
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 4
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 22
- 239000011888 foil Substances 0.000 claims description 21
- 239000000654 additive Substances 0.000 claims description 16
- 230000000996 additive effect Effects 0.000 claims description 16
- 239000000843 powder Substances 0.000 claims description 15
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 230000008602 contraction Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 238000004381 surface treatment Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 claims description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- 239000004709 Chlorinated polyethylene Substances 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 229910002804 graphite Inorganic materials 0.000 claims description 6
- 239000010439 graphite Substances 0.000 claims description 6
- 230000002209 hydrophobic effect Effects 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- -1 polyethylene Polymers 0.000 claims description 6
- 229920000573 polyethylene Polymers 0.000 claims description 6
- 238000001771 vacuum deposition Methods 0.000 claims description 6
- 230000002265 prevention Effects 0.000 claims description 5
- CAQWNKXTMBFBGI-UHFFFAOYSA-N C.[Na] Chemical compound C.[Na] CAQWNKXTMBFBGI-UHFFFAOYSA-N 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 244000137852 Petrea volubilis Species 0.000 claims description 3
- 239000004111 Potassium silicate Substances 0.000 claims description 3
- 239000004115 Sodium Silicate Substances 0.000 claims description 3
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 3
- 239000003153 chemical reaction reagent Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000000151 deposition Methods 0.000 claims description 3
- 230000008021 deposition Effects 0.000 claims description 3
- 238000007731 hot pressing Methods 0.000 claims description 3
- 238000001755 magnetron sputter deposition Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- BHGADZKHWXCHKX-UHFFFAOYSA-N methane;potassium Chemical compound C.[K] BHGADZKHWXCHKX-UHFFFAOYSA-N 0.000 claims description 3
- 239000005543 nano-size silicon particle Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 claims description 3
- 239000004417 polycarbonate Substances 0.000 claims description 3
- 229920000515 polycarbonate Polymers 0.000 claims description 3
- 229920013716 polyethylene resin Polymers 0.000 claims description 3
- 229910052913 potassium silicate Inorganic materials 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 3
- 238000004544 sputter deposition Methods 0.000 claims description 3
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 claims description 3
- 229920003002 synthetic resin Polymers 0.000 claims description 3
- 239000000057 synthetic resin Substances 0.000 claims description 3
- 238000009941 weaving Methods 0.000 claims description 3
- 239000007866 anti-wear additive Substances 0.000 claims description 2
- 238000013329 compounding Methods 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims description 2
- 238000009396 hybridization Methods 0.000 claims 1
- 230000008676 import Effects 0.000 claims 1
- 239000011159 matrix material Substances 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000009694 cold isostatic pressing Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
Images
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
- 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
-
- 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
- H01M8/0208—Alloys
-
- 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
- H01M8/0213—Gas-impermeable carbon-containing materials
-
- 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
- H01M8/026—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant characterised by grooves, e.g. their pitch or depth
-
- 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
- H01M8/0263—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant having meandering or serpentine paths
-
- 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
- H01M8/0265—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant the reactant or coolant channels having varying cross sections
-
- 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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04067—Heat exchange or temperature measuring elements, thermal insulation, e.g. heat pipes, heat pumps, fins
-
- 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)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a fuel cell titanium bipolar plate and a preparation method thereof, wherein the bipolar plate comprises a titanium-based shell and a reaction flow field, wherein an anode reactant inlet and an anode reactant outlet are respectively arranged at two ends of the titanium-based shell, and heat dissipation plates are respectively arranged at the side edges of the anode reactant inlet and the anode reactant outlet; the back surface of the titanium-based shell is provided with a plurality of heat dissipation grooves, and positioning holes are formed at four corners of the titanium-based shell; the titanium-based shell is made of a composite material with Ti-6A1-4V as a matrix and SIC fiber as a reinforcement; the surface of the titanium-based shell is sputtered with a carbon-based coating; the carbon-based coating is amorphous carbon, and the amorphous carbon is formed by hybridizing graphite-like carbon and diamond-like carbon; the carbon-based coating is also doped with titanium, zirconium and tungsten. The titanium bipolar plate of the fuel cell has good heat dissipation capacity, wear resistance, corrosion resistance and air tightness, and can be well suitable for the use environment of the fuel cell.
Description
Technical Field
The invention relates to the field of fuel cell bipolar plates, in particular to a fuel cell titanium bipolar plate and a preparation method thereof.
Background
The proton exchange membrane fuel cell is a clean and efficient power generation device which is a new energy technology in the current society, has the advantages of high energy conversion rate, environmental friendliness, silence, high reliability and the like, has wide prospects in the fields of fixed power stations, electric vehicles, military special power supplies and the like, and is one of key components of the proton exchange membrane fuel cell.
Patent No. 202111259224.0 discloses a method for preparing a composite bipolar plate for a fuel cell, which comprises the steps of mixing flake graphite powder and resin particles, molding by cold isostatic pressing, maintaining pressure, performing warp cutting and compression molding to obtain a preset shape, and curing to obtain the composite bipolar plate.
However, the above patents have the following disadvantages in specific uses: in the field of fuel cell bipolar plates, the bipolar plate needs a collecting box to conduct current, the fuel cell generates heat when in use, and the inside of the fuel cell is in an acid environment, so that the bipolar plate needs high electric conductivity, good heat dissipation capacity, corrosion resistance and good air tightness. And the existing fuel cell bipolar plate needs to be improved according to the above characteristics.
An effective solution to the problems in the related art has not been proposed yet.
Disclosure of Invention
The invention provides a fuel cell titanium bipolar plate and a preparation method thereof, aiming at the problems in the related art, so as to overcome the technical problems in the prior related art.
Therefore, the invention adopts the following specific technical scheme:
according to one aspect of the invention, a titanium bipolar plate of a fuel cell is provided, which comprises a titanium-based shell and a reaction flow field, wherein an anode reactant inlet and an anode reactant outlet are respectively arranged at two ends of the titanium-based shell, and heat dissipation plates are respectively arranged at the side edges of the anode reactant inlet and the anode reactant outlet; the back of the titanium-based shell is provided with a plurality of radiating grooves, and the four corners of the titanium-based shell are provided with positioning holes.
Furthermore, in order to effectively reduce the degree of reactant backflow in the reaction flow field and further enable the reactants to rapidly and uniformly enter the reaction flow field, the reaction flow field comprises a plurality of reaction flow channels, the reaction flow channels are connected end to end, and the middle of each reaction flow channel is provided with a wavy line flow channel; a first anti-backflow channel is arranged between the reaction channel and the anode reactant inlet, a second anti-backflow channel is arranged between the reaction channel and the anode reactant outlet, and the first anti-backflow channel and the second anti-backflow channel are identical in structure and opposite in direction; the first anti-backflow channel comprises a fixed block connected with the reaction flow channel, a feed inlet is formed in one end of the fixed block, a discharge outlet is formed in the other end of the fixed block, an anti-backflow structure is arranged inside the fixed block, and two ends of the anti-backflow structure are respectively connected with the feed inlet and the discharge outlet; wherein, backflow prevention structure includes a plurality of passageway groups, and adjacent be central symmetry structure between the passageway group, the passageway group comprises first passageway and second passageway, the one end of first passageway with the one end of second passageway is connected, just the one end of first passageway with the feed inlet is connected, the other end of first passageway with the other end of second passageway is connected. The first channel comprises a contraction section and an expansion section, one end of the contraction section is connected with one end of the feed inlet, and the other end of the contraction section is connected with one end of the expansion section. The second passageway includes segmental arc and slope section, the one end of segmental arc with the one end of contraction section is connected, the other end of segmental arc with the one end of slope section is connected, the other end of slope section with the other end of expansion section is connected.
Furthermore, the titanium-based shell is made of a composite material with Ti-6A1-4V as a matrix and SIC fiber as a reinforcement, a carbon-based coating is sputtered on the surface of the titanium-based shell, the carbon-based coating is amorphous carbon, the amorphous carbon is formed by hybridizing graphite-like carbon and diamond-like carbon, and titanium, zirconium and tungsten are doped in the carbon-based coating.
Further, the carbon-based coating also comprises an abrasion-resistant additive, a hydrophobic additive and a corrosion-resistant additive;
wherein the wear-resistant additive comprises at least one of SEBS powder, low-pressure polyethylene powder, high-pressure polyethylene powder and rubber powder;
the hydrophobic additive comprises at least one of nano silicon dioxide, methyl potassium silicate and methyl sodium silicate;
the corrosion-resistant additive comprises at least one of polycarbonate, synthetic resin powder, high chlorinated polyethylene and high chlorinated polyethylene resin.
According to another aspect of the present invention, there is provided a method for manufacturing a titanium bipolar plate for a fuel cell, the method comprising the steps of:
s1, carrying out surface treatment on Ti-6A1-4V and SIC fibers in a titanium-based shell;
s2, alternately weaving the SIC fibers subjected to surface treatment by using metal wires one by one, stacking the Ti-6A1-4V titanium alloy foil and the woven SIC fibers layer by layer, and finishing the manufacture of the titanium-based shell by a hot-pressing composite process;
s3, attaching the carbon-based coating to the titanium-based shell by using a near-field unbalanced magnetron sputtering technology, wherein the sputtering voltage is controlled to be 90-120V;
and S4, finishing the manufacture of the bipolar plate according to the size requirement.
Further, the surface treatment of Ti-6A1-4V in the titanium base shell also comprises the following steps:
sanding the surface of the Ti-6A1-4V titanium alloy foil by using sand paper with the granularity of 2000 meshes to remove oil stains on the surface of the Ti-6A1-4V titanium alloy foil;
soaking the surface of the Ti-6A1-4V titanium alloy foil in an acetone reagent;
and cleaning the Ti-6A1-4V titanium alloy foil by using an ultrasonic technology and high-purity alcohol.
Further, the surface treatment of the SIC fibers in the titanium-based shell also comprises the following steps:
preventing the SIC fibers from being in a vacuum coating chamber, and introducing high-purity nitrogen and high-purity argon into the vacuum coating chamber;
triggering a cathode high-purity titanium target to generate a large amount of titanium steam, reacting nitrogen with the titanium steam to generate a titanium nitride coating, and accelerating the deposition on the surface of the SIC fiber in a plasma zone formed by argon discharge.
Further, when the Ti-6A1-4V titanium alloy foil and the woven SIC fiber are stacked layer by layer, five layers of the Ti-6A1-4V titanium alloy foil and four layers of SIC fiber cloth are stacked and laid and placed in a high-strength graphite mold for preparation.
Furthermore, when the high-strength graphite mold is prepared, the pressure is 30MPa-200MPa.
The invention has the beneficial effects that: the titanium bipolar plate of the fuel cell has good heat dissipation capacity, corrosion resistance and air tightness, and can be well suitable for the use environment of the fuel cell. The titanium-based shell is made of the composite material which takes Ti-6A1-4V as a matrix and SIC fiber as a reinforcement, so that the titanium-based shell has high strength, high rigidity, good high-temperature resistance and excellent corrosion resistance. The surface of the titanium-based shell is sputtered with the carbon-based coating, so that the wear resistance, corrosion resistance, conductivity and hydrophobicity of the bipolar plate are further improved. The titanium bipolar plate of the fuel cell is beneficial to improving the stability and the durability of the fuel cell. According to the invention, the first backflow-preventing channel and the second backflow-preventing channel are arranged between the reaction flow channel in the reaction flow field and the anode reactant inlet and the anode reactant outlet, so that the degree of reactant backflow in the reaction flow field can be effectively reduced, and further the reactant can rapidly and uniformly enter the reaction flow field.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a front view of a titanium bipolar plate for a fuel cell in accordance with an embodiment of the present invention;
FIG. 2 is a back side view of a fuel cell titanium bipolar plate according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a first anti-backflow channel in a titanium bipolar plate of a fuel cell according to an embodiment of the present invention;
fig. 4 is a schematic diagram of the connection of a first channel and a second channel in a titanium bipolar plate for a fuel cell according to an embodiment of the invention.
In the figure:
1. a titanium-based housing; 2. a reaction flow field; 201. a reaction flow channel; 202. a wavy line runner; 3. an anode reactant inlet; 4. an anode reactant outlet; 5. a heat dissipation plate; 6. a heat dissipation groove; 7. positioning holes; 8. a first anti-backflow channel; 801. a fixed block; 802. a feed inlet; 803. a discharge port; 804. a backflow prevention structure; 8041. a first channel; 80411. a contraction section; 80412. an expansion section; 8042. a second channel; 80421. an arc-shaped section; 80422. an inclined section; 9. and a second backflow prevention channel.
Detailed Description
For further explanation of the various embodiments, the drawings which form a part of the disclosure and which are incorporated in and constitute a part of this specification, illustrate embodiments and, together with the description, serve to explain the principles of operation of the embodiments, and to enable others of ordinary skill in the art to understand the various embodiments and advantages of the invention, and, by reference to these figures, reference is made to the accompanying drawings, which are not to scale and wherein like reference numerals generally refer to like elements.
According to the embodiment of the invention, a fuel cell titanium bipolar plate and a preparation method thereof are provided.
According to an aspect of the present invention, as shown in fig. 1-2, a titanium bipolar plate for a fuel cell is provided, which includes a titanium-based housing 1 and a reaction flow field 2, an anode reactant inlet 3 and an anode reactant outlet 4 are respectively disposed at two ends of the titanium-based housing 1, and heat dissipation plates 5 are disposed at sides of the anode reactant inlet 3 and the anode reactant outlet 4; the back of the titanium-based shell 1 is provided with a plurality of heat dissipation grooves 6, and four corners of the titanium-based shell 1 are provided with positioning holes 7.
As shown in fig. 3 to 4, in an embodiment, the reaction flow field 2 includes a plurality of reaction flow channels 201, the reaction flow channels 201 are connected end to end, and a wavy line flow channel 202 is disposed in the middle of the reaction flow channels 201; a first backflow-preventing channel 8 is arranged between the reaction channel 201 and the anode reactant inlet 3, a second backflow-preventing channel 9 is arranged between the reaction channel 201 and the anode reactant outlet 4, and the first backflow-preventing channel 8 and the second backflow-preventing channel 9 have the same structure and are opposite in direction; the first backflow-preventing channel 8 comprises a fixed block 801 connected with the reaction channel 201, one end of the fixed block 801 is provided with a feed port 802, the other end of the fixed block 801 is provided with a discharge port 803, a backflow-preventing structure 804 is arranged inside the fixed block 801, and two ends of the backflow-preventing structure 804 are respectively connected with the feed port 802 and the discharge port 803; wherein, backflow prevention structure 804 includes a plurality of passageway groups, and is adjacent be central symmetry structure between the passageway group, the passageway group comprises first passageway 8041 and second passageway 8042, the one end of first passageway 8041 with the one end of second passageway 8042 is connected, just the one end of first passageway 8041 with feed inlet 802 is connected, the other end of first passageway 8041 with the other end of second passageway 8042 is connected. The first passage 8041 comprises a contraction section 80411 and an expansion section 80412, one end of the contraction section 80411 is connected with one end of the feed port 802, and the other end of the contraction section 80411 is connected with one end of the expansion section 80412. The second channel 8042 includes an arc-shaped section 80421 and an inclined section 80422, one end of the arc-shaped section 80421 is connected to one end of the contracting section 80411, the other end of the arc-shaped section 80421 is connected to one end of the inclined section 80422, and the other end of the inclined section 80422 is connected to the other end of the expanding section 80412, so that the degree of reactant backflow in the reaction flow field can be effectively reduced, and further, the reactant can rapidly and uniformly enter the reaction flow field.
In one embodiment, for the titanium-based shell 1, the titanium-based shell 1 is made of a composite material with Ti-6A1-4V as a matrix and SIC fibers as a reinforcement; the surface of the titanium-based shell 1 is sputtered with a carbon-based coating; the carbon-based coating is amorphous carbon, and the amorphous carbon is formed by hybridizing graphite-like carbon and diamond-like carbon; the carbon-based coating is also doped with titanium, zirconium and tungsten.
In one embodiment, the carbon-based coating further comprises an anti-wear additive, a hydrophobic additive, and a corrosion-resistance additive;
wherein the wear-resistant additive comprises at least one of SEBS powder, low-pressure polyethylene powder, high-pressure polyethylene powder and rubber powder;
the hydrophobic additive comprises at least one of nano silicon dioxide, methyl potassium silicate and methyl sodium silicate;
the corrosion-resistant additive comprises at least one of polycarbonate, synthetic resin powder, high chlorinated polyethylene and high chlorinated polyethylene resin.
According to another aspect of the present invention, there is provided a method for manufacturing a titanium bipolar plate for a fuel cell, the method comprising the steps of:
s1, carrying out surface treatment on Ti-6A1-4V and SIC fibers in a titanium-based shell 1;
s2, alternately weaving the SIC fibers subjected to surface treatment by using metal wires one by one, stacking the Ti-6A1-4V titanium alloy foil and the woven SIC fibers layer by layer, and finishing the manufacture of the titanium-based shell 1 by a hot-pressing compounding process;
s3, attaching the carbon-based coating to the titanium-based shell 1 by using a near-field unbalanced magnetron sputtering technology, and controlling the sputtering voltage to be 90-120V;
and S4, finishing the manufacture of the bipolar plate according to the size requirement.
In one embodiment, the surface treatment of Ti-6A1-4V in the titanium base shell 1 further comprises the following steps:
polishing the surface of the Ti-6A1-4V titanium alloy foil by using sand paper with the granularity of 2000 meshes to remove oil stains on the surface of the Ti-6A1-4V titanium alloy foil;
soaking the surface of the Ti-6A1-4V titanium alloy foil in an acetone reagent;
and cleaning the Ti-6A1-4V titanium alloy foil by using an ultrasonic technology and high-purity alcohol.
In one embodiment, the surface treatment of the SIC fiber in the titanium-based housing 1 further comprises the steps of:
preventing the SIC fibers from being in a vacuum coating chamber, and introducing high-purity nitrogen and high-purity argon into the vacuum coating chamber;
triggering a cathode high-purity titanium target to generate a large amount of titanium steam, reacting nitrogen with the titanium steam to generate a titanium nitride coating, and accelerating the deposition on the surface of the SIC fiber in a plasma zone formed by argon discharge.
In one embodiment, when the Ti-6A1-4V titanium alloy foil and the woven SIC fiber are stacked layer by layer, five layers of Ti-6A1-4V titanium alloy foil and four layers of SIC fiber cloth are paved in a stacking mode and placed in a high-strength graphite mold to prepare the titanium alloy.
In one embodiment, the high strength graphite mold is prepared at a pressure of 30MPa to 200MPa.
In conclusion, the fuel cell titanium bipolar plate has good heat dissipation capacity, corrosion resistance and air tightness, and can be well suitable for the use environment of fuel cells. The titanium-based shell 1 is made of a composite material with Ti-6A1-4V as a matrix and SIC fibers as a reinforcement, so that the titanium-based shell 1 has high strength, high rigidity, good high-temperature resistance and excellent corrosion resistance. The surface of the titanium-based shell 1 is sputtered with the carbon-based coating, so that the wear resistance, the corrosion resistance, the conductivity and the hydrophobicity of the bipolar plate are further improved. The titanium bipolar plate of the fuel cell is beneficial to improving the stability and the durability of the fuel cell. According to the invention, the first anti-backflow channel and the second anti-backflow channel are arranged between the reaction flow channel in the reaction flow field and the anode reactant inlet and the anode reactant outlet, so that the degree of reactant backflow in the reaction flow field can be effectively reduced, and the reactant can rapidly and uniformly enter the reaction flow field.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A fuel cell titanium bipolar plate comprises a titanium-based shell (1) and a reaction flow field (2), and is characterized in that:
an anode reactant inlet (3) and an anode reactant outlet (4) are respectively formed in two ends of the titanium-based shell (1), and heat dissipation plates (5) are respectively arranged on the side edges of the anode reactant inlet (3) and the anode reactant outlet (4);
the back of the titanium-based shell (1) is provided with a plurality of radiating grooves (6), and positioning holes (7) are formed in four corners of the titanium-based shell (1).
2. The fuel cell titanium bipolar plate according to claim 1, wherein said reaction flow field (2) comprises a plurality of reaction flow channels (201), a plurality of said reaction flow channels (201) are connected end to end, and a wavy flow channel (202) is disposed in the middle of said reaction flow channels (201);
reaction runner (201) with be provided with first anti-return way (8) between anode reactant import (3), reaction runner (201) with be provided with second anti-return way (9) between anode reactant export (4), just first anti-return way (8) with second anti-return way (9) the same and opposite direction of structure.
3. The titanium bipolar plate for the fuel cell as set forth in claim 2, wherein the first anti-backflow channel (8) comprises a fixing block (801) connected to the reaction flow channel (201), one end of the fixing block (801) is provided with a feed port (802), the other end of the fixing block (801) is provided with a discharge port (803), an anti-backflow structure (804) is disposed inside the fixing block (801), and two ends of the anti-backflow structure (804) are respectively connected to the feed port (802) and the discharge port (803);
the backflow prevention structure (804) comprises a plurality of channel groups, a central symmetry structure is arranged between the adjacent channel groups, each channel group is composed of a first channel (8041) and a second channel (8042), one end of each first channel (8041) is connected with one end of each second channel (8042), one end of each first channel (8041) is connected with the corresponding feed port (802), and the other end of each first channel (8041) is connected with the other end of each second channel (8042).
The first channel (8041) comprises a contraction section (80411) and an expansion section (80412), one end of the contraction section (80411) is connected with one end of the feed inlet (802), and the other end of the contraction section (80411) is connected with one end of the expansion section (80412).
The second passageway (8042) includes segmental arc (80421) and slope section (80422), the one end of segmental arc (80421) with the one end of contraction section (80411) is connected, the other end of segmental arc (80421) with the one end of slope section (80422) is connected, the other end of slope section (80422) with the other end of expansion section (80412) is connected.
4. The fuel cell titanium bipolar plate according to claim 1, wherein the titanium-based housing (1) is a composite material with Ti-6A1-4V as a base body and SIC fiber as a reinforcement body, a carbon-based coating is sputtered on the surface of the titanium-based housing (1), the carbon-based coating is amorphous carbon, the amorphous carbon is formed by hybridization of graphite-like carbon and diamond-like carbon, and the carbon-based coating is doped with titanium, zirconium and tungsten.
5. The fuel cell titanium bipolar plate of claim 4, wherein said carbon-based coating further comprises an anti-wear additive, a hydrophobic additive, and a corrosion-resistant additive;
wherein the wear-resistant additive comprises at least one of SEBS powder, low-pressure polyethylene powder, high-pressure polyethylene powder and rubber powder;
the hydrophobic additive comprises at least one of nano silicon dioxide, methyl potassium silicate and methyl sodium silicate;
the corrosion-resistant additive comprises at least one of polycarbonate, synthetic resin powder, high chlorinated polyethylene and high chlorinated polyethylene resin.
6. A fuel cell titanium bipolar plate and a preparation method thereof are characterized in that the preparation method is used for preparing the fuel cell titanium bipolar plate of claim 5, and the preparation method comprises the following steps:
s1, carrying out surface treatment on Ti-6A1-4V and SIC fibers in a titanium-based shell (1);
s2, alternately weaving the SIC fibers subjected to surface treatment by using metal wires one by one, stacking the Ti-6A1-4V titanium alloy foil and the woven SIC fibers layer by layer, and finishing the manufacture of the titanium-based shell (1) by a hot-pressing compounding process;
s3, attaching the carbon-based coating to the titanium-based shell (1) by using a near-field unbalanced magnetron sputtering technology, and controlling the sputtering voltage to be 90-120V;
and S4, finishing the manufacture of the bipolar plate according to the size requirement.
7. The method for preparing a fuel cell titanium bipolar plate according to claim 6, wherein the surface treatment of Ti-6A1-4V in the titanium base housing (1) further comprises the following steps:
polishing the surface of the Ti-6A1-4V titanium alloy foil by using sand paper with the granularity of 2000 meshes to remove oil stains on the surface of the Ti-6A1-4V titanium alloy foil;
soaking the surface of the Ti-6A1-4V titanium alloy foil in an acetone reagent;
and cleaning the Ti-6A1-4V titanium alloy foil by using an ultrasonic technology and high-purity alcohol.
8. The method for preparing a fuel cell titanium bipolar plate according to claim 6, wherein the surface treatment of SIC fibers in the titanium-based housing (1) further comprises the following steps:
preventing the SIC fibers from being in a vacuum coating chamber, and introducing high-purity nitrogen and high-purity argon into the vacuum coating chamber;
triggering a cathode high-purity titanium target to generate a large amount of titanium steam, reacting nitrogen with the titanium steam to generate a titanium nitride coating, and accelerating the deposition on the surface of the SIC fiber in a plasma zone formed by argon discharge.
9. The method for preparing a titanium bipolar plate for a fuel cell as claimed in claim 6, wherein when the Ti-6A1-4V titanium alloy foil and the woven SIC fiber are stacked one on top of another, five layers of the Ti-6A1-4V titanium alloy foil and four layers of the SIC fiber are stacked and placed in a high-strength graphite mold for preparation.
10. The method of claim 9, wherein the pressure during the manufacturing in the high-strength graphite mold is between 30MPa and 200MPa.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104835968A (en) * | 2014-11-28 | 2015-08-12 | 武汉工程大学 | Titanium alloy bipolar plate nano-crystal zirconium coating of proton-exchange membrane fuel cell and preparation method thereof |
| CN107834086A (en) * | 2017-10-30 | 2018-03-23 | 黑泰（上海）材料科技有限公司 | Fuel battery double plates |
| CN111224119A (en) * | 2019-12-02 | 2020-06-02 | 北京科技大学 | Preparation method and application of nitride coating on surface of titanium alloy bipolar plate |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104835968A (en) * | 2014-11-28 | 2015-08-12 | 武汉工程大学 | Titanium alloy bipolar plate nano-crystal zirconium coating of proton-exchange membrane fuel cell and preparation method thereof |
| CN107834086A (en) * | 2017-10-30 | 2018-03-23 | 黑泰（上海）材料科技有限公司 | Fuel battery double plates |
| CN111224119A (en) * | 2019-12-02 | 2020-06-02 | 北京科技大学 | Preparation method and application of nitride coating on surface of titanium alloy bipolar plate |
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