CN115354297B - Titanium-based coating fuel cell metal polar plate and preparation method thereof - Google Patents
Titanium-based coating fuel cell metal polar plate and preparation method thereof Download PDFInfo
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- CN115354297B CN115354297B CN202210936747.2A CN202210936747A CN115354297B CN 115354297 B CN115354297 B CN 115354297B CN 202210936747 A CN202210936747 A CN 202210936747A CN 115354297 B CN115354297 B CN 115354297B
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- 239000000446 fuel Substances 0.000 title claims abstract description 74
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 70
- 239000002184 metal Substances 0.000 title claims abstract description 70
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 239000010936 titanium Substances 0.000 title claims abstract description 56
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 56
- 239000011248 coating agent Substances 0.000 title claims abstract description 18
- 238000000576 coating method Methods 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 229910001069 Ti alloy Inorganic materials 0.000 claims abstract description 169
- 239000000758 substrate Substances 0.000 claims abstract description 144
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 73
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 71
- 239000007789 gas Substances 0.000 claims abstract description 67
- 238000010438 heat treatment Methods 0.000 claims abstract description 63
- 238000000034 method Methods 0.000 claims abstract description 57
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 48
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 48
- 230000007704 transition Effects 0.000 claims abstract description 46
- 239000011159 matrix material Substances 0.000 claims abstract description 27
- 239000003054 catalyst Substances 0.000 claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000000151 deposition Methods 0.000 claims abstract description 12
- 230000008021 deposition Effects 0.000 claims abstract description 12
- 239000001301 oxygen Substances 0.000 claims abstract description 12
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 12
- 238000007781 pre-processing Methods 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 238000005498 polishing Methods 0.000 claims description 48
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 20
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 10
- 229910052786 argon Inorganic materials 0.000 claims description 10
- 229910001882 dioxygen Inorganic materials 0.000 claims description 10
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 239000011651 chromium Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 description 28
- 230000007797 corrosion Effects 0.000 description 12
- 238000005260 corrosion Methods 0.000 description 12
- 244000137852 Petrea volubilis Species 0.000 description 9
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 7
- 239000012528 membrane Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910021645 metal ion Inorganic materials 0.000 description 5
- 230000002708 enhancing effect Effects 0.000 description 4
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 238000005240 physical vapour deposition Methods 0.000 description 3
- 239000002574 poison Substances 0.000 description 3
- 231100000614 poison Toxicity 0.000 description 3
- 238000010923 batch production Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- 231100000572 poisoning Toxicity 0.000 description 2
- 230000000607 poisoning effect Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/26—Deposition of carbon only
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/02—Pretreatment of the material to be coated
- C23C16/0272—Deposition of sub-layers, e.g. to promote the adhesion of the main coating
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/56—After-treatment
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/10—Oxidising
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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
- H01M8/0208—Alloys
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0213—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
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0223—Composites
- H01M8/0228—Composites in the form of layered or coated products
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Sustainable Energy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Electrochemistry (AREA)
- Inorganic Chemistry (AREA)
- Composite Materials (AREA)
- Fuel Cell (AREA)
Abstract
The application discloses a titanium-based coating fuel cell metal polar plate and a preparation method thereof, wherein the preparation method comprises the following steps: s01, preprocessing a titanium alloy polar plate matrix to obtain a preprocessed titanium alloy polar plate matrix; s02, heating the pretreated titanium alloy polar plate substrate, and then introducing oxygen to react for 0.1-2.0 h to obtain the titanium alloy polar plate substrate with the surface covered with the titanium oxide transition layer; s03, introducing carbon source gas into the titanium alloy polar plate substrate covered with the titanium oxide transition layer on the surface, heating and then carrying out carbon deposition reaction for 1-100 min to obtain the titanium alloy polar plate substrate with the titanium oxide transition layer and carbon deposited on the surface; s04, introducing rare gas into the titanium alloy polar plate substrate of the titanium oxide transition layer with carbon deposited on the surface in the step S03, then adding a catalyst, and heating and reacting for 1-100 min to obtain the titanium-based coated fuel cell metal polar plate. The method is simple, low in cost, high in production efficiency and easy for mass production.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a titanium-based coating fuel cell metal polar plate and a preparation method thereof.
Background
A fuel cell is a power generation device that directly converts chemical energy in fuel into electric energy through an electrochemical reaction. Compared with the traditional energy source, the fuel cell is an efficient and clean electrochemical power generation device, and has recently received widespread attention at home and abroad.
The bipolar plate is one of the core components of a Proton Exchange Membrane Fuel Cell (PEMFC), and the quality of the bipolar plate directly determines the output power of the cell stack and the service life of the cell stack. The metal bipolar plate is a focus of attention in the current PEMFC bipolar plate research because of excellent mechanical property and electric conductivity. However, the pure metal bipolar plate is easy to corrode in the proton exchange membrane fuel cell environment, and after the metal bipolar plate corrodes, metal ions which can poison a catalyst are released, or a compact oxide film which can increase interface contact resistance is formed, so that the output power and the service life of the fuel cell are greatly influenced.
Disclosure of Invention
Based on the above, the invention provides a titanium-based coated fuel cell metal polar plate and a preparation method thereof, which aim to solve the problems that the existing metal polar plate is easy to corrode in a proton exchange membrane fuel cell environment, and after the metal polar plate corrodes, metal ions which can poison a catalyst are released, or a compact oxide film which can increase interface contact resistance is formed, so that the output power and the service life of the fuel cell are greatly influenced, and the like. The compact titanium carbide layer is prepared on the surface of the titanium alloy matrix, so that the effects of enhancing conductivity, corrosion resistance and mechanical property are achieved, and the high-performance and long-time use requirements of the fuel cell metal polar plate are met.
In order to achieve the above object, in one aspect, the embodiment of the present invention provides a method for preparing a metal electrode plate of a titanium-based coated fuel cell, including the steps of:
s01, preprocessing a titanium alloy polar plate matrix to obtain a preprocessed titanium alloy polar plate matrix;
s02, heating the pretreated titanium alloy polar plate substrate in the step S01 to 300-600 ℃, and then introducing oxygen to react for 0.1-2.0 h to obtain the titanium alloy polar plate substrate with the surface covered with the titanium oxide transition layer;
s03, introducing carbon source gas into the titanium alloy polar plate substrate with the titanium oxide transition layer covered on the surface in the step S02, heating to 800-1000 ℃, and then carrying out carbon deposition reaction for 1-100 min to obtain the titanium alloy polar plate substrate with the titanium oxide transition layer with carbon deposited on the surface;
s04, introducing rare gas into the titanium alloy polar plate substrate of the titanium oxide transition layer with carbon deposited on the surface in the step S03, then adding a catalyst, heating to 1200-1500 ℃ and reacting for 1-100 min to obtain the titanium-based coated fuel cell metal polar plate.
In a preferred embodiment, in step S01,
the thickness of the titanium alloy polar plate substrate is preferably 0.01-10 mm.
The thickness of the pretreated titanium alloy polar plate substrate is 0.001 mm-0.1 mm thinner than that of the titanium alloy polar plate substrate.
The pretreatment is realized by the following method: and placing the titanium alloy polar plate substrate on a polishing disc for polishing to obtain the pretreated titanium alloy polar plate substrate.
In the embodiment of the application, the polishing disc is a polishing disc attached with sand paper, and the surface of the titanium alloy polar plate substrate is polished and ground through high-speed rotation of the polishing disc so as to remove a mechanical damage layer and a stress layer on the surface of the titanium alloy polar plate substrate, and a clean titanium alloy polar plate substrate (namely, a pretreated titanium alloy polar plate substrate) is obtained.
In a preferred embodiment, in step S02,
the heating rate is preferably 10 to 50 ℃/min.
The flow rate of the oxygen gas is preferably 10sccm to 100sccm.
In a preferred embodiment, in step S03,
the carbon source gas is preferably CH 4 、C 2 H 2 CO or C 2 H 4 And (3) waiting for gas.
The flow rate of the carbon source gas is preferably 10sccm to 100sccm.
The heating rate is preferably 10 to 50 ℃/min.
In a preferred embodiment, in step S04,
the rare gas is preferably argon.
The flow rate of the rare gas is 50sccm to 200sccm.
The heating rate is preferably 10 to 50 ℃/min.
On the other hand, the embodiment of the application also provides the titanium-based coating fuel cell metal polar plate obtained by the preparation method.
According to the method, a layer of compact titanium carbide is prepared on the surface of the titanium alloy substrate, so that the effects of enhancing the conductivity, corrosion resistance and mechanical property of the metal electrode plate of the fuel cell are achieved, the high-performance and long-time use requirements of the metal electrode plate of the fuel cell are met, and the problems that the existing metal electrode plate is easy to corrode in a proton exchange membrane fuel cell environment, metal ions capable of poisoning a catalyst are released after the metal electrode plate corrodes, or a compact oxide film capable of increasing interface contact resistance is formed, the output power and the service life of the fuel cell are greatly influenced and the like can be solved. The preparation method disclosed by the invention is simple, is more environment-friendly, has lower production cost and higher production efficiency, and is easy for batch or large-scale production.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the embodiments.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described in the following embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, 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.
It should be noted that, if directional indications (such as up, down, left, right, front, back, top, bottom … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture, and if the specific posture is changed, the directional indications are correspondingly changed.
In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
At present, the existing metal polar plate is easy to corrode in the proton exchange membrane fuel cell environment, and after the metal polar plate corrodes, metal ions which can poison a catalyst are released, or a compact oxide film which can increase interface contact resistance is formed, so that the output power and the service life of the fuel cell are greatly influenced. Based on the foregoing, there is a need for a titanium-based coated fuel cell metal plate and a method for preparing the same to solve the above-mentioned technical problems.
In order to achieve the above object, in one aspect, the embodiment of the present invention provides a method for preparing a metal electrode plate of a titanium-based coated fuel cell, including the steps of:
s01, preprocessing a titanium alloy polar plate matrix to obtain a preprocessed titanium alloy polar plate matrix;
s02, heating the pretreated titanium alloy polar plate substrate in the step S01 to 300-600 ℃, and then introducing oxygen to react for 0.1-2.0 h to obtain the titanium alloy polar plate substrate with the surface covered with the titanium oxide transition layer;
s03, introducing carbon source gas into the titanium alloy polar plate substrate with the titanium oxide transition layer covered on the surface in the step S02, heating to 800-1000 ℃, and then carrying out carbon deposition reaction for 1-100 min to obtain the titanium alloy polar plate substrate with the titanium oxide transition layer with carbon deposited on the surface;
s04, introducing rare gas into the titanium alloy polar plate substrate of the titanium oxide transition layer with carbon deposited on the surface in the step S03, then adding a catalyst, heating to 1200-1500 ℃ and reacting for 1-100 min to obtain the titanium-based coated fuel cell metal polar plate.
In the embodiment of the application, the operation of each step can be coordinated maximally by controlling the reaction conditions (including the reaction temperature, the reaction time, the dosage of each reactant and the like) of each step, so that the effect of preparing the titanium-based coated fuel cell metal electrode plate is optimal, the quality of the titanium-based coating is improved while the generation of byproducts is effectively prevented, the uniformity of the coating is ensured, and the stability of the performance of the titanium-based coated fuel cell metal electrode plate is further ensured.
Titanium directly reacts with carbon source gas, the reaction temperature is too high, the reaction condition is harsh, industrialization is difficult, the influence on the base material is relatively large, and the uniformity of the coating is difficult to ensure.
The titanium oxide exists on the surface of the titanium alloy matrix, the titanium oxide transition layer is generated by reacting the matrix with oxygen, then carbon deposition is carried out by reducing carbon source gas, and finally titanium carbide is generated by reacting deposited carbon and titanium oxide, so that the method has mild reaction conditions, is easy to industrialize, can ensure the uniformity of a coating, has higher quality of the coating, and simultaneously ensures that the metal polar plate of the titanium-based coating fuel cell has better stability.
In a preferred embodiment, in step S01,
the thickness of the titanium alloy polar plate substrate is preferably 0.01-10 mm. Therefore, the quality of the titanium-based coating can be optimized while the cost is effectively controlled, the uniformity of the coating is ensured, and the performance of the metal electrode plate of the titanium-based coated fuel cell is optimized.
The thickness of the pretreated titanium alloy polar plate substrate is 0.001 mm-0.1 mm thinner than that of the titanium alloy polar plate substrate. In this way, the titanium-based coated fuel cell metal plate performance can be optimized.
The pretreatment is realized by the following method: and (3) placing the titanium alloy polar plate substrate on a polishing disc for polishing (in the embodiment of the application, the polishing conditions are 3000-5000 r/min for 5-10 min), so as to obtain the pretreated titanium alloy polar plate substrate.
In the embodiment of the application, the polishing disc is a polishing disc attached with sand paper, and the surface of the titanium alloy polar plate substrate is polished and ground through high-speed rotation of the polishing disc so as to remove a mechanical damage layer and a stress layer on the surface of the titanium alloy polar plate substrate, and a clean titanium alloy polar plate substrate (namely, a pretreated titanium alloy polar plate substrate) is obtained.
In a preferred embodiment, in step S02,
the heating rate is preferably 10 to 50 ℃/min.
The flow rate of the oxygen gas is preferably 10sccm to 100sccm.
In a preferred embodiment, in step S03,
the carbon source gas is preferably CH 4 、C 2 H 2 CO or C 2 H 4 And (3) waiting for gas. The carbon source gas can be CVD (Chemical Vapor Deposition ) or PVD (Physical Vapor Deposition, physical vapor deposition)Product) is deposited, CVD is preferred in the examples of the present application.
The flow rate of the carbon source gas is preferably 10sccm to 100sccm.
The heating rate is preferably 10 to 50 ℃/min.
In step S03, a reduction reaction is performed by covering the surface with the titanium oxide transition layer and the carbon source gas, so that the carbon element is deposited on the surface of the substrate.
In a preferred embodiment, in step S04,
the rare gas is preferably argon.
The flow rate of the rare gas is 50sccm to 200sccm. Thus, a layer of compact titanium carbide can be prepared on the surface of the titanium alloy matrix, thereby achieving the effects of enhancing the conductivity, corrosion resistance and mechanical property of the metal polar plate of the fuel cell and meeting the high-performance and long-time use requirements of the metal polar plate of the fuel cell.
The catalyst is preferably metallic chromium; the specific amount of catalyst used is dependent on the area of the plate, preferably 0.02g/cm 2 ～0.08g/cm 2 。
The heating rate is preferably 10 to 50 ℃/min. Thus, a layer of compact titanium carbide can be prepared on the surface of the titanium alloy matrix, and the compact uniformity of the titanium carbide is ensured.
In step S04, the mechanism for generating the titanium-based coating of the titanium-based coated fuel cell metal plate is:
TiO 2 +3C→TiC+2CO。
on the other hand, the embodiment of the application also provides the titanium-based coating fuel cell metal polar plate obtained by the preparation method.
According to the method, a layer of compact titanium carbide is prepared on the surface of the titanium alloy substrate, so that the effects of enhancing the conductivity, corrosion resistance and mechanical property of the metal electrode plate of the fuel cell are achieved, the high-performance and long-time use requirements of the metal electrode plate of the fuel cell are met, and the problems that the existing metal electrode plate is easy to corrode in a proton exchange membrane fuel cell environment, metal ions capable of poisoning a catalyst are released after the metal electrode plate corrodes, or a compact oxide film capable of increasing interface contact resistance is formed, the output power and the service life of the fuel cell are greatly influenced and the like can be solved. The preparation method disclosed by the invention is simple, is more environment-friendly, has lower production cost and higher production efficiency, and is easy for batch or large-scale production.
In the embodiment of the application, the prepared titanium-based coated fuel cell metal polar plate has the tensile strength of 550-720 Mpa, the compressive strength of 430-640 Mpa, the resistivity of 0.22-0.30 microohm-m at normal temperature, and the corrosion rate of the polar plate per hundred hours measured by adopting a weight increasing method is 0.15mg/cm 2 ～0.24mg/cm 2 。
Example 1
A preparation method of a titanium-based coated fuel cell metal polar plate comprises the following steps:
s01, preprocessing a titanium alloy polar plate matrix to obtain a preprocessed titanium alloy polar plate matrix;
s02, heating the pretreated titanium alloy polar plate substrate in the step S01 to 500 ℃, and then introducing oxygen to react for 1.0h to obtain the titanium alloy polar plate substrate with the surface covered with the titanium oxide transition layer;
s03, introducing carbon source gas into the titanium alloy polar plate substrate with the titanium oxide transition layer covered on the surface in the step S02, heating to 800 ℃, and then carrying out carbon deposition reaction for 10min to obtain the titanium alloy polar plate substrate with the titanium oxide transition layer and carbon deposited on the surface;
and S04, introducing rare gas into the titanium alloy polar plate substrate of the titanium oxide transition layer with carbon deposited on the surface in the step S03, then adding a catalyst, heating to 1200 ℃ and reacting for 30min to obtain the titanium-based coated fuel cell metal polar plate.
In the step S01 of the process,
the thickness of the titanium alloy polar plate substrate is preferably 0.1mm.
The thickness of the pretreated titanium alloy polar plate substrate is 0.01-0.02 mm thinner than that of the titanium alloy polar plate substrate.
The pretreatment is realized by the following method: and placing the titanium alloy polar plate substrate on a polishing disc for polishing to obtain the pretreated titanium alloy polar plate substrate.
In the embodiment of the application, the polishing disc is a polishing disc attached with sand paper, and the surface of the titanium alloy polar plate substrate is polished and ground through high-speed rotation of the polishing disc so as to remove a mechanical damage layer and a stress layer on the surface of the titanium alloy polar plate substrate, and a clean titanium alloy polar plate substrate (namely, a pretreated titanium alloy polar plate substrate) is obtained.
In step S02 of the process,
the heating speed is 20 ℃/min.
The flow rate of the oxygen gas was 30sccm.
In the step S03 of the process,
the carbon source gas is CH 4 。
The flow rate of the carbon source gas was 40sccm.
The heating speed is 20 ℃/min.
In step S04 the process proceeds to the step of,
the rare gas is argon.
The flow rate of the rare gas is 200sccm.
The heating speed is 15 ℃/min.
The prepared titanium-based coated fuel cell metal polar plate has the tensile strength of 550Mpa, the compressive strength of 430Mpa, the resistivity of 0.3 micro ohm-meter at normal temperature, and the corrosion rate of the polar plate per hundred hours measured by adopting a weight increasing method is 0.15mg/cm 2 。
Example 2
A preparation method of a titanium-based coated fuel cell metal polar plate comprises the following steps:
s01, preprocessing a titanium alloy polar plate matrix to obtain a preprocessed titanium alloy polar plate matrix;
s02, heating the pretreated titanium alloy polar plate substrate in the step S01 to 450 ℃, and then introducing oxygen to react for 1.0h to obtain the titanium alloy polar plate substrate with the surface covered with the titanium oxide transition layer;
s03, introducing carbon source gas into the titanium alloy polar plate substrate with the titanium oxide transition layer covered on the surface in the step S02, heating to 900 ℃, and then carrying out carbon deposition reaction for 15min to obtain the titanium alloy polar plate substrate with the titanium oxide transition layer and carbon deposited on the surface;
and S04, introducing rare gas into the titanium alloy polar plate substrate of the titanium oxide transition layer with carbon deposited on the surface in the step S03, then adding a catalyst, heating to 1300 ℃ and reacting for 50min to obtain the titanium-based coated fuel cell metal polar plate.
In the step S01 of the process,
the thickness of the titanium alloy polar plate substrate is 0.2mm.
The thickness of the pretreated titanium alloy polar plate substrate is 0.01-0.02 mm thinner than that of the titanium alloy polar plate substrate.
The pretreatment is realized by the following method: and placing the titanium alloy polar plate substrate on a polishing disc for polishing to obtain the pretreated titanium alloy polar plate substrate.
In the embodiment of the application, the polishing disc is a polishing disc attached with sand paper, and the surface of the titanium alloy polar plate substrate is polished and ground through high-speed rotation of the polishing disc so as to remove a mechanical damage layer and a stress layer on the surface of the titanium alloy polar plate substrate, and a clean titanium alloy polar plate substrate (namely, a pretreated titanium alloy polar plate substrate) is obtained.
In step S02 of the process,
the heating speed is 15 ℃/min.
The flow rate of the oxygen gas was 30sccm.
In the step S03 of the process,
the carbon source gas is C 2 H 2 。
The flow rate of the carbon source gas was 40sccm.
The heating speed is 15 ℃/min.
In step S04 the process proceeds to the step of,
the rare gas is preferably argon.
The flow rate of the rare gas was 150sccm.
The heating speed is 25 ℃/min.
The prepared titanium-based coated fuel cell metal polar plate has the tensile strength of 720Mpa, the compressive strength of 640Mpa, the resistivity of 0.28 micro ohm-meter at normal temperature, and the corrosion rate of the polar plate per hundred hours measured by adopting a weight increasing method is 0.18mg/cm 2 。
Example 3
A preparation method of a titanium-based coated fuel cell metal polar plate comprises the following steps:
s01, preprocessing a titanium alloy polar plate matrix to obtain a preprocessed titanium alloy polar plate matrix;
s02, heating the pretreated titanium alloy polar plate substrate in the step S01 to 600 ℃, and then introducing oxygen to react for 1.0h to obtain the titanium alloy polar plate substrate with the surface covered with the titanium oxide transition layer;
s03, introducing carbon source gas into the titanium alloy polar plate substrate with the titanium oxide transition layer covered on the surface in the step S02, heating to 1000 ℃, and then carrying out carbon deposition reaction for 15min to obtain the titanium alloy polar plate substrate with the titanium oxide transition layer with carbon deposited on the surface;
and S04, introducing rare gas into the titanium alloy polar plate substrate of the titanium oxide transition layer with carbon deposited on the surface in the step S03, then adding a catalyst, heating to 1500 ℃ and reacting for 60min to obtain the titanium-based coated fuel cell metal polar plate.
In the step S01 of the process,
the thickness of the titanium alloy polar plate substrate is 0.15mm.
The thickness of the pretreated titanium alloy polar plate substrate is 0.01-0.02 mm thinner than that of the titanium alloy polar plate substrate.
The pretreatment is realized by the following method: and placing the titanium alloy polar plate substrate on a polishing disc for polishing to obtain the pretreated titanium alloy polar plate substrate.
In the embodiment of the application, the polishing disc is a polishing disc attached with sand paper, and the surface of the titanium alloy polar plate substrate is polished and ground through high-speed rotation of the polishing disc so as to remove a mechanical damage layer and a stress layer on the surface of the titanium alloy polar plate substrate, and a clean titanium alloy polar plate substrate (namely, a pretreated titanium alloy polar plate substrate) is obtained.
In step S02 of the process,
the heating speed is 25 ℃/min.
The flow rate of the oxygen gas was 35sccm.
In the step S03 of the process,
the carbon source gasThe body is CH 4 。
The flow rate of the carbon source gas was 60sccm.
The heating speed is 25 ℃/min.
In step S04 the process proceeds to the step of,
the rare gas is argon.
The flow rate of the rare gas is 100sccm.
The heating speed is 25 ℃/min.
The prepared titanium-based coated fuel cell metal polar plate has tensile strength of 600Mpa, compressive strength of 500Mpa, resistivity of 0.22 microohm-meter at normal temperature, and corrosion rate of 0.24mg/cm per hundred hours measured by adopting a weight increasing method 2 。
Example 4
A preparation method of a titanium-based coated fuel cell metal polar plate comprises the following steps:
s01, preprocessing a titanium alloy polar plate matrix to obtain a preprocessed titanium alloy polar plate matrix;
s02, heating the pretreated titanium alloy polar plate substrate in the step S01 to 300 ℃, and then introducing oxygen to react for 2.0h to obtain the titanium alloy polar plate substrate with the surface covered with the titanium oxide transition layer;
s03, introducing carbon source gas into the titanium alloy polar plate substrate with the titanium oxide transition layer covered on the surface in the step S02, heating to 800 ℃, and then carrying out carbon deposition reaction for 100min to obtain the titanium alloy polar plate substrate with the titanium oxide transition layer and carbon deposited on the surface;
and S04, introducing rare gas into the titanium alloy polar plate substrate of the titanium oxide transition layer with carbon deposited on the surface in the step S03, then adding a catalyst, heating to 1200 ℃ and reacting for 100min to obtain the titanium-based coated fuel cell metal polar plate.
In the step S01 of the process,
the thickness of the titanium alloy polar plate substrate is 10mm.
The thickness of the pretreated titanium alloy polar plate substrate is 0.01-0.02 mm thinner than that of the titanium alloy polar plate substrate.
The pretreatment is realized by the following method: and placing the titanium alloy polar plate substrate on a polishing disc for polishing to obtain the pretreated titanium alloy polar plate substrate.
In the embodiment of the application, the polishing disc is a polishing disc attached with sand paper, and the surface of the titanium alloy polar plate substrate is polished and ground through high-speed rotation of the polishing disc so as to remove a mechanical damage layer and a stress layer on the surface of the titanium alloy polar plate substrate, and a clean titanium alloy polar plate substrate (namely, a pretreated titanium alloy polar plate substrate) is obtained.
In step S02 of the process,
the heating speed is 50 ℃/min.
The flow rate of the oxygen gas is 100sccm.
In the step S03 of the process,
the carbon source gas is CO.
The flow rate of the carbon source gas is 100sccm.
The heating speed is 50 ℃/min.
In step S04 the process proceeds to the step of,
the rare gas is argon.
The flow rate of the rare gas is 200sccm.
The heating speed is 50 ℃/min.
The prepared titanium-based coated fuel cell metal polar plate has the tensile strength of 720Mpa, the compressive strength of 640Mpa, the resistivity of 0.30 microohm-meter at normal temperature, and the corrosion rate of the polar plate per hundred hours measured by adopting a weight increasing method is 0.24mg/cm 2 。
Example 5
A preparation method of a titanium-based coated fuel cell metal polar plate comprises the following steps:
s01, preprocessing a titanium alloy polar plate matrix to obtain a preprocessed titanium alloy polar plate matrix;
s02, heating the pretreated titanium alloy polar plate substrate in the step S01 to 600 ℃, and then introducing oxygen to react for 0.1h to obtain the titanium alloy polar plate substrate with the surface covered with the titanium oxide transition layer;
s03, introducing carbon source gas into the titanium alloy polar plate substrate with the titanium oxide transition layer covered on the surface in the step S02, heating to 800 ℃, and then carrying out carbon deposition reaction for 1min to obtain the titanium alloy polar plate substrate with the titanium oxide transition layer with carbon deposited on the surface;
and S04, introducing rare gas into the titanium alloy polar plate substrate of the titanium oxide transition layer with carbon deposited on the surface in the step S03, then adding a catalyst, heating to 1500 ℃ and reacting for 1min to obtain the titanium-based coated fuel cell metal polar plate.
In the step S01 of the process,
the thickness of the titanium alloy polar plate substrate is 0.05mm.
The thickness of the pretreated titanium alloy polar plate substrate is 0.001 mm-0.01 mm thinner than that of the titanium alloy polar plate substrate.
The pretreatment is realized by the following method: and placing the titanium alloy polar plate substrate on a polishing disc for polishing to obtain the pretreated titanium alloy polar plate substrate.
In the embodiment of the application, the polishing disc is a polishing disc attached with sand paper, and the surface of the titanium alloy polar plate substrate is polished and ground through high-speed rotation of the polishing disc so as to remove a mechanical damage layer and a stress layer on the surface of the titanium alloy polar plate substrate, and a clean titanium alloy polar plate substrate (namely, a pretreated titanium alloy polar plate substrate) is obtained.
In step S02 of the process,
the heating speed is 10 ℃/min.
The flow rate of the oxygen gas was 10sccm.
In the step S03 of the process,
the carbon source gas is C 2 H 4 。
The flow rate of the carbon source gas was 10sccm.
The heating speed is 10 ℃/min.
In step S04 the process proceeds to the step of,
the rare gas is argon.
The flow rate of the rare gas was 50sccm.
The heating speed is 10 ℃/min.
The prepared titanium-based coating fuel cell metal polar plate has tensile strength of 580Mpa, compressive strength of 470Mpa, resistivity of 0.23 microohm-meter at normal temperature, and adopts the increaseThe corrosion rate of the polar plate measured by a gravimetric method is 0.18mg/cm per hundred hours 2 。
Comparative example 1
A preparation method of a titanium-based coated fuel cell metal polar plate comprises the following steps:
s01, preprocessing a titanium alloy polar plate matrix to obtain a preprocessed titanium alloy polar plate matrix;
s02, heating the pretreated titanium alloy polar plate substrate in the step S01 to 500 ℃, and then introducing oxygen to react for 1.0h to obtain the titanium alloy polar plate substrate with the surface covered with the titanium oxide transition layer;
s03, introducing carbon source gas into the titanium alloy polar plate substrate with the titanium oxide transition layer covered on the surface in the step S02, heating to 800 ℃, and then carrying out carbon deposition reaction for 10min to obtain the titanium alloy polar plate substrate with the titanium oxide transition layer and carbon deposited on the surface;
and S04, introducing rare gas into the titanium alloy polar plate substrate of the titanium oxide transition layer with carbon deposited on the surface in the step S03, then adding a catalyst, heating to 1200 ℃ and reacting for 30min to obtain the titanium-based coated fuel cell metal polar plate.
In the step S01 of the process,
the thickness of the titanium alloy polar plate substrate is preferably 0.1mm.
The thickness of the pretreated titanium alloy polar plate substrate is 0.01-0.02 mm thinner than that of the titanium alloy polar plate substrate.
The pretreatment is realized by the following method: and placing the titanium alloy polar plate substrate on a polishing disc for polishing to obtain the pretreated titanium alloy polar plate substrate.
In the embodiment of the application, the polishing disc is a polishing disc attached with sand paper, and the surface of the titanium alloy polar plate substrate is polished and ground through high-speed rotation of the polishing disc so as to remove a mechanical damage layer and a stress layer on the surface of the titanium alloy polar plate substrate, and a clean titanium alloy polar plate substrate (namely, a pretreated titanium alloy polar plate substrate) is obtained.
In step S02 of the process,
the heating speed is 20 ℃/min.
The flow rate of the oxygen gas was 30sccm.
In the step S03 of the process,
the carbon source gas is CH 4 。
The flow rate of the carbon source gas was 40sccm.
The heating speed is 20 ℃/min.
In step S04 the process proceeds to the step of,
the rare gas is argon.
The flow rate of the rare gas was 40sccm.
The heating speed is 15 ℃/min.
The prepared titanium-based coated fuel cell metal polar plate has the tensile strength of 550Mpa, the compressive strength of 430Mpa, the resistivity of 0.28 microohm-meter at normal temperature, and the corrosion rate of the polar plate per hundred hours measured by adopting a weight increasing method is 0.13mg/cm 2 。
Comparative example 2
A preparation method of a titanium-based coated fuel cell metal polar plate comprises the following steps:
s01, preprocessing a titanium alloy polar plate matrix to obtain a preprocessed titanium alloy polar plate matrix;
s02, heating the pretreated titanium alloy polar plate substrate in the step S01 to 500 ℃, and then introducing oxygen to react for 1.0h to obtain the titanium alloy polar plate substrate with the surface covered with the titanium oxide transition layer;
s03, introducing carbon source gas into the titanium alloy polar plate substrate with the titanium oxide transition layer covered on the surface in the step S02, heating to 800 ℃, and then carrying out carbon deposition reaction for 10min to obtain the titanium alloy polar plate substrate with the titanium oxide transition layer and carbon deposited on the surface;
and S04, introducing rare gas into the titanium alloy polar plate substrate of the titanium oxide transition layer with carbon deposited on the surface in the step S03, then adding a catalyst, heating to 1000 ℃ and reacting for 110min to obtain the titanium-based coated fuel cell metal polar plate.
In the step S01 of the process,
the thickness of the titanium alloy polar plate substrate is preferably 0.1mm.
The thickness of the pretreated titanium alloy polar plate substrate is 0.01-0.02 mm thinner than that of the titanium alloy polar plate substrate.
The pretreatment is realized by the following method: and placing the titanium alloy polar plate substrate on a polishing disc for polishing to obtain the pretreated titanium alloy polar plate substrate.
In the embodiment of the application, the polishing disc is a polishing disc attached with sand paper, and the surface of the titanium alloy polar plate substrate is polished and ground through high-speed rotation of the polishing disc so as to remove a mechanical damage layer and a stress layer on the surface of the titanium alloy polar plate substrate, and a clean titanium alloy polar plate substrate (namely, a pretreated titanium alloy polar plate substrate) is obtained.
In step S02 of the process,
the heating speed is 20 ℃/min.
The flow rate of the oxygen gas was 30sccm.
In the step S03 of the process,
the carbon source gas is CH 4 。
The flow rate of the carbon source gas was 40sccm.
The heating speed is 20 ℃/min.
In step S04 the process proceeds to the step of,
the rare gas is argon.
The flow rate of the rare gas is 200sccm.
The heating speed is 15 ℃/min.
The prepared titanium-based coating fuel cell metal polar plate has tensile strength of 450Mpa, compressive strength of 330Mpa, resistivity of 0.18 microohm-meter at normal temperature, and corrosion rate of 0.25mg/cm per hundred hours measured by adopting a weight increasing method 2 。
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the content of the present invention or direct/indirect application in other related technical fields are included in the scope of the present invention.
Claims (10)
1. The preparation method of the titanium-based coated fuel cell metal polar plate is characterized by comprising the following steps:
s01, preprocessing a titanium alloy polar plate matrix to obtain a preprocessed titanium alloy polar plate matrix;
s02, heating the pretreated titanium alloy polar plate substrate in the step S01 to 300-600 ℃, and then introducing oxygen to react for 0.1-2.0 h to obtain the titanium alloy polar plate substrate with the surface covered with the titanium oxide transition layer;
s03, introducing carbon source gas into the titanium alloy polar plate substrate with the titanium oxide transition layer covered on the surface in the step S02, heating to 800-1000 ℃, and then carrying out carbon deposition reaction for 1-100 min to obtain the titanium alloy polar plate substrate with the titanium oxide transition layer with carbon deposited on the surface;
s04, introducing rare gas into the titanium alloy polar plate substrate of the titanium oxide transition layer with carbon deposited on the surface in the step S03, then adding a catalyst, heating to 1200-1500 ℃ and reacting for 1-100 min to obtain a titanium-based coating fuel cell metal polar plate;
the flow rate of the carbon source gas is 10 sccm-100 sccm;
the flow rate of the rare gas is 50 sccm-200 sccm;
the catalyst is metallic chromium; the specific dosage of the catalyst is 0.02g/cm 2 ～0.08g/cm 2 。
2. The method for preparing a metal electrode plate of a titanium-based coated fuel cell according to claim 1, wherein in the step S01, the thickness of the titanium alloy electrode plate substrate is 0.01mm to 10mm.
3. The method for preparing a titanium-based coated fuel cell metal plate according to claim 2, wherein the thickness of the pretreated titanium alloy plate substrate is 0.001mm to 0.1mm thinner than the thickness of the titanium alloy plate substrate.
4. The method for preparing a metal plate of a titanium-based coated fuel cell according to claim 1, wherein in step S01, the pretreatment is performed by: and placing the titanium alloy polar plate substrate on a polishing disc for polishing to obtain the pretreated titanium alloy polar plate substrate.
5. The method for producing a metal electrode plate for a titanium-based coated fuel cell according to claim 1, wherein in step S02, the heating rate is 10 ℃/min to 50 ℃/min.
6. The method for producing a metal electrode plate for a titanium-based coated fuel cell according to claim 1, wherein in step S02, the flow rate of oxygen gas is 10sccm to 100sccm.
7. The method for producing a metal electrode plate of a titanium-based coated fuel cell according to claim 1, wherein in step S03, the carbon source gas is CH 4 、C 2 H 2 CO or C 2 H 4 。
8. The method of producing a titanium-based coated fuel cell metal plate according to claim 7, wherein the heating rate is 10 ℃/min to 50 ℃/min.
9. The method for producing a titanium-based coated fuel cell metal plate according to claim 1, wherein, in step S04,
the rare gas is argon;
the heating speed is 10-50 ℃/min.
10. A titanium-based coated fuel cell metal plate prepared by the method of any one of claims 1 to 9.
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| US9520600B2 (en) * | 2009-09-22 | 2016-12-13 | GM Global Technology Operations LLC | Conductive and hydrophilic bipolar plate coatings and method of making the same |
| EP3272889A4 (en) * | 2015-03-18 | 2018-07-25 | Nippon Steel & Sumitomo Metal Corporation | Titanium alloy, separator, and solid polymer fuel cell |
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| CN101604756A (en) * | 2008-06-11 | 2009-12-16 | 财团法人工业技术研究院 | Bipolar plates and fuel cell |
| JP2014022250A (en) * | 2012-07-20 | 2014-02-03 | Kobe Steel Ltd | Fuel cell separator |
| CN105322184A (en) * | 2014-07-07 | 2016-02-10 | 江苏冰城电材股份有限公司 | Production technology of metal bipolar plate for proton exchange membrane fuel cell |
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