CN114561680B - Ti on metal bipolar plate 3 SiC 2 Preparation method of ceramic coating and metal bipolar plate - Google Patents
Ti on metal bipolar plate 3 SiC 2 Preparation method of ceramic coating and metal bipolar plate Download PDFInfo
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 82
- 239000002184 metal Substances 0.000 title claims abstract description 82
- 238000005524 ceramic coating Methods 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000000843 powder Substances 0.000 claims abstract description 45
- 239000000725 suspension Substances 0.000 claims abstract description 28
- 238000004140 cleaning Methods 0.000 claims abstract description 21
- 238000001962 electrophoresis Methods 0.000 claims abstract description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical group O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000008367 deionised water Substances 0.000 claims description 17
- 229910021641 deionized water Inorganic materials 0.000 claims description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 16
- 238000000498 ball milling Methods 0.000 claims description 16
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 12
- 239000002270 dispersing agent Substances 0.000 claims description 10
- 238000000151 deposition Methods 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000002904 solvent Substances 0.000 claims description 6
- 229920002873 Polyethylenimine Polymers 0.000 claims description 5
- 238000001652 electrophoretic deposition Methods 0.000 claims description 5
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 4
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 4
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 4
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 3
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 3
- 238000009210 therapy by ultrasound Methods 0.000 claims description 3
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 229910009817 Ti3SiC2 Inorganic materials 0.000 claims 17
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000000758 substrate Substances 0.000 abstract description 9
- 239000012535 impurity Substances 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 description 26
- 238000005260 corrosion Methods 0.000 description 26
- 239000011248 coating agent Substances 0.000 description 12
- 238000000576 coating method Methods 0.000 description 12
- 238000011010 flushing procedure Methods 0.000 description 8
- 239000012528 membrane Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 8
- 239000000446 fuel Substances 0.000 description 7
- 230000008021 deposition Effects 0.000 description 6
- 238000005229 chemical vapour deposition Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000005189 flocculation Methods 0.000 description 4
- 230000016615 flocculation Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 229910021645 metal ion Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910003902 SiCl 4 Inorganic materials 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/02—Electrophoretic coating characterised by the process with inorganic material
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/22—Servicing or operating apparatus or multistep processes
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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
-
- 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
- H01M8/0215—Glass; Ceramic materials
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention discloses Ti on a metal bipolar plate 3 SiC 2 The preparation method of the ceramic coating and the metal bipolar plate comprises the following steps: cleaning the metal bipolar plate; configuration Ti 3 SiC 2 A powder suspension; the Ti is 3 SiC 2 The powder suspension is deposited on the cathode surface of the metal bipolar plate by electrophoresis. The invention deposits Ti on the cathode surface of the metal bipolar plate by electrophoresis 3 SiC 2 The ceramic coating avoids the introduction of impurity phase and the damage of high temperature to the substrate, and greatly reduces the preparation of Ti 3 SiC 2 Time period and cost of the ceramic coating.
Description
Technical Field
The invention relates to the technical field of fuel cell materials, in particular to Ti on a metal bipolar plate 3 SiC 2 A method for preparing a ceramic coating and a metal bipolar plate.
Background
Bipolar plates are an important component of proton exchange membrane fuel cells, accounting for more than 30% of the cost of the entire proton exchange membrane fuel cell, and are mainly of three types: graphite bipolar plates, composite bipolar plates and metal bipolar plates, wherein the metal bipolar plates have the advantages of high strength, low cost, easy machining, good electric and heat conductivity and the like, and are widely paid attention to. However, the metal bipolar plate is in contact with water vapor, and the inside of the exchange membrane fuel cell is in an acidic environment and has high temperature, so that the metal bipolar plate is easy to corrode, metal ions are separated out, and a membrane electrode is poisoned. Ti (Ti) 3 SiC 2 Not only has the advantages of high strength and high modulus of ceramic, but also has the excellent electric conduction, heat conduction and corrosion resistance of metal, meanwhile, because the unique hexagonal lamellar structure has self-lubricity, the preparation of Ti in the metal bipolar plate can be considered 3 SiC 2 The coating thereby enhances its corrosion resistance and service life.
At present for Ti 3 SiC 2 The deposition of the coating uses a Chemical Vapor Deposition (CVD) method, which is to crack the reaction gas under the action of a high-temperature thermal field, and to deposit the coating by complex chemical reaction on the surface of the substrate, wherein the prior Ti is as follows 3 SiC 2 The coating CVD synthesis system mainly has two synthesis routes, one is TiCl 4 +SiCl 4 +CH 4 +H 2 One is CH 3 SiCl 3 +TiCl 4 +H 2 +Ar, ti finally produced by these two routes 3 SiC 2 The coating inevitably contains a higher TiC impurity phase and requires a higher reaction temperature and a longer reaction time. The patent (CN 11091705A) avoids the introduction of impurity phases to a certain extent through Reactive Chemical Vapor Deposition (RCVD), but needs two depositions, is more complicated, and the substrate needs to be deposited with a coating in an environment with the temperature of more than 1000 ℃, thereby having higher requirements on the high temperature resistance of the substrate.
Disclosure of Invention
The invention provides Ti on a metal bipolar plate 3 SiC 2 Preparation method of ceramic coating and metal bipolar plate capable of solving problem Ti 3 SiC 2 The problems of more coating impurities and harsh reaction conditions are solved, and the corrosion resistance and the service life of the metal bipolar plate are improved. In order to solve the technical problems, the invention provides a Ti on a metal bipolar plate 3 SiC 2 The preparation method of the ceramic coating comprises the following steps:
cleaning the metal bipolar plate;
configuration Ti 3 SiC 2 A powder suspension;
subjecting the Ti to 3 SiC 2 The powder suspension is deposited on the cathode surface of the metal bipolar plate by electrophoresis.
Preferably, the Ti is 3 SiC 2 The powder suspension is deposited on the cathode surface of the metal bipolar plate through electrophoresis, and then the method further comprises the following steps of: taking out deposited Ti 3 SiC 2 And drying the cathode electrode plate of the ceramic coating at 70-100 ℃.
Preferably, the specific steps for cleaning the metal bipolar plate are as follows:
sequentially placing the metal bipolar plate into ethanol and acetone for ultrasonic cleaning;
washing the metal bipolar plate with deionized water;
and drying at 70-100 ℃.
Preferably, ti is arranged 3 SiC 2 The specific steps of the powder suspension are as follows:
for Ti 3 SiC 2 Ball milling the powder;
treated Ti 3 SiC 2 Adding a solvent into the powder;
adding a dispersing agent;
stirring uniformly and then carrying out ultrasonic treatment;
stirring uniformly by a magnetic stirrer to form Ti 3 SiC 2 Powder suspension.
Preferably, ti after ball milling treatment 3 SiC 2 The grain size of the powder is 0.5-1.8 mu m.
Preferably, the solvent is deionized water, ethanol or methanol, the dispersing agent is polyethyleneimine, sodium polyacrylate or polyvinylpyrrolidone, the volume ratio of the solvent is 1-2.5%, and the mass of the dispersing agent and the Ti are 3 SiC 2 The mass proportion of the powder is 2% -15% dwb%.
Preferably, the Ti is 3 SiC 2 The specific steps of the powder suspension deposited on the cathode surface of the metal bipolar plate through electrophoresis are as follows:
placing the cleaned metal bipolar plate into the Ti 3 SiC 2 Powder suspension;
clamping the metal bipolar plate with an electrode as a cathode and an anode;
and starting a direct current power supply to perform electrophoretic deposition.
Preferably, the distance between the cathode and the anode is 1-2.5 cm, the voltage of the direct current power supply is 3-30V, and the electrophoretic deposition time is 1-5 min.
The invention adopts an electrophoretic deposition mode to deposit Ti on the metal bipolar plate 3 SiC 2 The ceramic coating can be carried out at room temperature, so that the damage of high temperature to a substrate is avoided, and the introduction of impurity phase TiC is avoided.
The invention also provides a metal bipolar plate, which is prepared by adopting the preparation method 3 A metal bipolar plate of SiC ceramic coating.
The surface of the metal bipolar plate prepared by the invention is loaded with high corrosion resistance Ti 3 SiC 2 The ceramic coating is not easy to corrode and separate out metal ions, and can greatly prolong the service life of the battery when being applied to proton exchange membrane fuel cells.
Drawings
FIG. 1 is Ti on a metallic bipolar plate 3 SiC 2 A flow chart of a preparation method of the ceramic coating.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The present embodiment provides a Ti on a metallic bipolar plate 3 SiC 2 Referring to fig. 1, the preparation method of the ceramic coating comprises the following steps:
s100, cleaning a metal bipolar plate, namely placing the metal bipolar plate into 100ml of ethanol, ultrasonically cleaning for 30min, taking out, flushing with deionized water, then placing into 100ml of acetone, ultrasonically cleaning for 30min, taking out, flushing with deionized water, then placing into an oven for drying at 70 ℃ for standby, and ultrasonically cleaning greasy dirt and dust on the surface of the metal bipolar plate twice;
s200, configuring Ti 3 SiC 2 Powder suspension, ball mill for Ti 3 SiC 2 Ball milling treatment is carried out, the rotating speed of the ball mill is set to 400rpm/min, the ball milling time is 20h, and Ti is obtained after ball milling 3 SiC 2 Particle size of 0.5 μm, ti of 0.5 μm 3 SiC 2 Adding deionized water into the powder, wherein the deionized water accounts for 1vol%, adding a dispersing agent polyethylenimine, wherein the polyethylenimine accounts for 2% dwb%, stirring for 1min by using a glass rod to prevent flocculation of larger particles, and performing ultrasonic treatment for 5min to obtain Ti 3 SiC 2 The powder is better dispersed in deionized water, and then stirred for 30min by a magnetic stirrer, and the rotating speed is set to be 100rpm/min, so as to form Ti 3 SiC 2 A powder suspension;
s300, by combining the Ti 3 SiC 2 The powder suspension is electrophoretically deposited on the surface of the cathode of the metal bipolar plate, the cleaned metal bipolar plate is clamped by an electrode clamp to serve as a cathode and an anode, the distance between the two electrodes is 1cm, the voltage of a direct current power supply is set to be 3V, the power supply is started, and the deposition time is 1min;
s400, taking out deposited Ti 3 SiC 2 A coated cathode electrode plate is horizontally placed;
s500, placing the metal bipolar plate into an oven for drying at 70 ℃ to dry the water on the surface of the metal bipolar plate.
In the present embodiment, ti 3 SiC 2 The charged particles in the powder suspension system move directionally to the electrode with opposite charges under the action of an electric field and deposit a coating, and Ti is deposited on the cathode electrode plate of the metal bipolar plate 3 SiC 2 And (3) a ceramic coating.
In the present embodiment, ti is deposited with 3 SiC 2 The corrosion potential of the metal bipolar plate with the ceramic coating is 90.3mV, and the corrosion current is 2.6x10 -4 μA.cm -2 The corrosion potential of the uncoated metal bipolar plate was-340 mV, and the corrosion current was 1.75. Mu.A.cm -2 Description of Ti 3 SiC 2 The existence of the coating greatly improves the corrosion resistance of the bipolar plate, protects the substrate and prolongs the service life.
Example 2
The present embodiment provides a Ti on a metallic bipolar plate 3 SiC 2 Referring to fig. 1, the preparation method of the ceramic coating comprises the following steps:
s100, cleaning a metal bipolar plate, namely placing the metal bipolar plate into 100ml of ethanol, ultrasonically cleaning for 30min, taking out, flushing with deionized water, then placing into 100ml of acetone, ultrasonically cleaning for 30min, taking out, flushing with deionized water, then placing into an oven for drying at 70 ℃ for standby, and ultrasonically cleaning greasy dirt and dust on the surface of the metal bipolar plate twice;
s200, configuring Ti 3 SiC 2 Powder suspension, ball mill for Ti 3 SiC 2 Ball milling is carried outTreating, setting the rotating speed of the ball mill to 400rpm/min, the ball milling time to 20h, and performing Ti ball milling 3 SiC 2 Particle size of 0.5 μm, ti of 0.5 μm 3 SiC 2 Adding the powder into deionized water with the ratio of 1vol%, adding dispersant sodium polyacrylate with the ratio of 2% dwb%, stirring with glass rod for 1min to prevent flocculation of larger particles, and ultrasonic treating for 5min to obtain Ti 3 SiC 2 The powder is better dispersed in deionized water, and then stirred for 30min by a magnetic stirrer, and the rotating speed is set to be 100rpm/min, so as to form Ti 3 SiC 2 A powder suspension;
electrophoresis of S300 solution to obtain Ti 3 SiC 2 Powder is deposited on the surface of the cathode of the metal bipolar plate in a suspending way, the cleaned metal bipolar plate is clamped by an electrode clamp to serve as a cathode and an anode, the distance between the two electrodes is 1cm, the voltage of a direct current power supply is set to be 3V, the power supply is started, and the deposition time is 1min;
s400, taking out deposited Ti 3 SiC 2 A coated cathode electrode plate;
s500, placing the metal bipolar plate into an oven for drying at 70 ℃ to dry the water on the surface of the metal bipolar plate.
In the present embodiment, ti is deposited with 3 SiC 2 The corrosion potential of the metal bipolar plate of the ceramic coating is 87.6mV, and the corrosion current is 2.56x10 -4 μA.cm -2 The corrosion potential of the uncoated metal bipolar plate was-340 mV, and the corrosion current was 1.75. Mu.A.cm -2 Description of Ti 3 SiC 2 The existence of the coating greatly improves the corrosion resistance of the bipolar plate, protects the substrate and prolongs the service life.
Example 3
The present embodiment provides a Ti on a metallic bipolar plate 3 SiC 2 Referring to fig. 1, the preparation method of the ceramic coating comprises the following steps:
s100, cleaning a metal bipolar plate, namely placing the metal bipolar plate into 100ml of ethanol, ultrasonically cleaning for 30min, taking out and flushing with deionized water, then placing into 100ml of acetone, ultrasonically cleaning for 30min, taking out and flushing with deionized water, then placing into an oven for drying at 70 ℃ for standby, and ultrasonically cleaning greasy dirt and dust on the surface of the metal bipolar plate twice;
s200, configuring Ti 3 SiC 2 Powder suspension, ball mill for Ti 3 SiC 2 Ball milling treatment is carried out, the rotating speed of the ball mill is set to 400rpm/min, the ball milling time is 20h, and Ti is obtained after ball milling 3 SiC 2 Particle size of 0.5 μm, ti of 0.5 μm 3 SiC 2 Adding methanol into the powder with methanol content of 1vol%, adding polyvinylpyrrolidone as dispersant with polyethyleneimine content of 2% dwb%, stirring with glass rod for 1min to prevent flocculation of larger particles, and ultrasonic treating for 5min to obtain Ti 3 SiC 2 The powder is better dispersed in methanol, and then stirred for 30min by a magnetic stirrer, and the rotating speed is set to be 100rpm/min to form Ti 3 SiC 2 A powder suspension;
s300, the Ti is processed by electrophoresis 3 SiC 2 The powder suspension is deposited on the surface of the cathode of the metal bipolar plate, the cleaned metal bipolar plate is clamped by an electrode clamp to serve as a cathode and an anode, the distance between the two electrodes is 1cm, the voltage of a direct current power supply is set to be 3V, the power supply is started, and the deposition time is 1min;
s400, taking out deposited Ti 3 SiC 2 A coated cathode electrode plate is horizontally placed;
s500, placing the metal bipolar plate into an oven for drying at 70 ℃ and drying the moisture on the surface of the metal bipolar plate.
In the present embodiment, ti is deposited with 3 SiC 2 The corrosion potential of the coated metal bipolar plate was 106.5mV, and the corrosion current was 2.75x10 -4 μA.cm -2 The corrosion potential of the uncoated metal bipolar plate was-340 mVmV, and the corrosion current was 1.75. Mu.A.cm -2 Description of Ti 3 SiC 2 The existence of the coating greatly improves the corrosion resistance of the bipolar plate, protects the substrate and prolongs the service life.
Example 4
The present embodiment provides a Ti on a metallic bipolar plate 3 SiC 2 Referring to fig. 1, the preparation method of the ceramic coating comprises the following steps:
s100, cleaning a metal bipolar plate, namely placing the metal bipolar plate into 100ml of ethanol, ultrasonically cleaning for 30min, taking out and flushing with deionized water, then placing into 100ml of acetone, ultrasonically cleaning for 30min, taking out and flushing with deionized water, then placing into an oven for drying at 100 ℃ for standby, and ultrasonically cleaning greasy dirt and dust on the surface of the metal bipolar plate twice;
s200, configuring Ti 3 SiC 2 Powder suspension, ball mill for Ti 3 SiC 2 Ball milling treatment is carried out, the rotating speed of the ball mill is set to 400rpm/min, the ball milling time is 20h, and Ti is obtained after ball milling 3 SiC 2 The grain diameter is 1.8 mu m, and Ti of 0.5 mu m 3 SiC 2 Adding methanol into the powder with the ratio of 2.5vol%, adding polyvinylpyrrolidone as dispersant with the ratio of 15% dwb%, stirring with glass rod for 2min to prevent flocculation of larger particles, and ultrasonic treating for 20min to obtain Ti 3 SiC 2 The powder is better dispersed in methanol, and then stirred by a magnetic stirrer for 45min, and the rotating speed is set to 200rpm/min to form Ti 3 SiC 2 A powder suspension;
s300, the Ti is processed by electrophoresis 3 SiC 2 The powder suspension is deposited on the surface of the cathode of the metal bipolar plate, the cleaned metal bipolar plate is clamped by an electrode clamp to serve as a cathode and an anode, the distance between the two electrodes is 2.5cm, the voltage of a direct current power supply is set to be 30V, the power supply is started, and the deposition time is 5min;
s400, taking out deposited Ti 3 SiC 2 A coated cathode electrode plate is horizontally placed;
s500, placing the metal bipolar plate into a baking oven for baking at 100 ℃ to dry the moisture on the surface of the metal bipolar plate.
In the present embodiment, ti is deposited with 3 SiC 2 The corrosion potential of the coated metal bipolar plate was 113.2mV and the corrosion current was 2.68x10 -4 μA.cm -2 The corrosion potential of the uncoated metal bipolar plate was-340 mVmV, and the corrosion current was 1.75. Mu.A.cm -2 Description of Ti 3 SiC 2 The existence of the coating greatly improves the corrosion resistance of the bipolar plate, protects the substrate and prolongs the service life.
Example 5
In this embodiment, a metal bipolar plate is provided, which is prepared by the preparation method described in any one of embodiments 1-3, and can be used for preparing proton exchange membrane fuel cells, where the surface of the metal bipolar plate is loaded with high corrosion resistance Ti 3 SiC 2 The ceramic coating is not easy to corrode and separate out metal ions, and does not poison membrane electrodes, so that the corrosion resistance and the service life of the proton exchange membrane fuel cell are greatly improved.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The preparation method of the Ti3SiC2 ceramic coating on the metal bipolar plate is characterized by comprising the following steps of:
cleaning the metal bipolar plate;
preparing Ti3SiC2 powder suspension; the preparation method of the Ti3SiC2 powder suspension comprises the following specific steps:
ball milling is carried out on Ti3SiC2 powder, and the grain size range of the Ti3SiC2 powder after ball milling is 0.5-1.8 mu m;
adding a solvent into the treated Ti3SiC2 powder, wherein the solvent is deionized water, ethanol or methanol, and the volume ratio of the solvent is 1% -2.5%;
adding a dispersing agent, wherein the dispersing agent is polyethyleneimine, sodium polyacrylate or polyvinylpyrrolidone, and the mass ratio of the dispersing agent to the Ti3SiC2 powder is 2-15%;
stirring uniformly and then carrying out ultrasonic treatment;
uniformly stirring by a magnetic stirrer to form Ti3SiC2 powder suspension;
and depositing the Ti3SiC2 powder suspension on the surface of the cathode of the metal bipolar plate through electrophoresis.
2. The method of preparing a Ti3SiC2 ceramic coating on a metallic bipolar plate of claim 1, wherein the step of electrophoretically depositing the Ti3SiC2 powder suspension on the cathode surface of the metallic bipolar plate further comprises the steps of: taking out the cathode electrode plate deposited with Ti3SiC2 ceramic coating, and drying at 70-100 ℃.
3. The method for preparing a Ti3SiC2 ceramic coating on a metallic bipolar plate according to claim 1, wherein the specific steps of cleaning the metallic bipolar plate are:
sequentially placing the metal bipolar plate into ethanol and acetone for ultrasonic cleaning;
washing the metal bipolar plate with deionized water;
and drying at 70-100 ℃.
4. The method for preparing a Ti3SiC2 ceramic coating on a metallic bipolar plate according to claim 1, characterized by the specific steps of depositing said Ti3SiC2 powder suspension on the metallic bipolar plate cathode surface by electrophoresis:
placing the cleaned metal bipolar plate into the Ti3SiC2 powder suspension;
clamping the metal bipolar plate with an electrode as a cathode and an anode;
and starting a direct current power supply to perform electrophoretic deposition.
5. The method for preparing a Ti3SiC2 ceramic coating on a metal bipolar plate according to claim 4, wherein the distance between the anode and the cathode is 1-2.5 cm, the voltage of the direct current power supply is 3-30V, and the electrophoretic deposition time is 1-5 min.
6. A metal bipolar plate produced by the production method according to any one of claims 1 to 5.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345152A (en) * | 2010-07-30 | 2012-02-08 | 中国科学院金属研究所 | Method for preparing Ti-Si-Al-C ceramic coating through electrophoretic deposition |
| KR20170086270A (en) * | 2016-01-18 | 2017-07-26 | 한국원자력연구원 | Ti3SiC2 COATING COMPOSITION AND COATING METHOD USING THE SAME |
| CN107190275A (en) * | 2011-04-05 | 2017-09-22 | 辉光能源公司 | Electrochemical hydrogen-catalyst power system based on water |
| CN110911705A (en) * | 2019-11-20 | 2020-03-24 | 上海大学 | Ti on fuel cell composite bipolar plate3SiC2Method for producing a coating |
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2022
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| CN102345152A (en) * | 2010-07-30 | 2012-02-08 | 中国科学院金属研究所 | Method for preparing Ti-Si-Al-C ceramic coating through electrophoretic deposition |
| CN107190275A (en) * | 2011-04-05 | 2017-09-22 | 辉光能源公司 | Electrochemical hydrogen-catalyst power system based on water |
| KR20170086270A (en) * | 2016-01-18 | 2017-07-26 | 한국원자력연구원 | Ti3SiC2 COATING COMPOSITION AND COATING METHOD USING THE SAME |
| CN110911705A (en) * | 2019-11-20 | 2020-03-24 | 上海大学 | Ti on fuel cell composite bipolar plate3SiC2Method for producing a coating |
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