CN113809348A - Preparation method of cathode current collector of solid oxide fuel cell - Google Patents
Preparation method of cathode current collector of solid oxide fuel cell Download PDFInfo
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- CN113809348A CN113809348A CN202111028197.6A CN202111028197A CN113809348A CN 113809348 A CN113809348 A CN 113809348A CN 202111028197 A CN202111028197 A CN 202111028197A CN 113809348 A CN113809348 A CN 113809348A
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- current collector
- cathode current
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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
- H01M8/023—Porous and characterised by the material
- H01M8/0232—Metals or 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
- H01M8/023—Porous and characterised by the material
- H01M8/0239—Organic resins; Organic polymers
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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
- H01M8/023—Porous and characterised by the material
- H01M8/0241—Composites
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M2004/8678—Inert electrodes with catalytic activity, e.g. for fuel cells characterised by the polarity
- H01M2004/8689—Positive electrodes
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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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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- 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 preparation method of a cathode current collector of a solid oxide fuel cell, which comprises the following steps: s1, preparing materials: firstly weighing a current collector cathode material and a proper amount of copper aluminum foil, then adding alcohol and butanone, and then adding a mixed solvent and a triethanolamine dispersant; s2, primary mixing: and (3) uniformly mixing and processing by using a planetary ball mill, and uniformly mixing under a controllable condition. According to the invention, by adopting the novel special preparation method, the cathode current collector prepared by the tape casting hot-pressing method can effectively collect electrons generated by electrode reaction, the contact interface is improved, the performance of the LSC current collector is very stable under the test condition, the tape casting method prepared by the method has the advantages of simple process, low cost and the like, is very suitable for the preparation work of the cathode current collector of the battery, has less loss on the prepared cathode current collector, and thus the obtained finished cathode current collector has higher quality and has wide application prospect.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a preparation method of a cathode current collector of a solid oxide fuel battery.
Background
The solid oxide fuel cell belongs to one of the traditional cells, is a third-generation fuel cell, is an all-solid-state chemical power generation device which directly converts chemical energy stored in fuel and oxidant into electric energy at high temperature, is one of the current fuel cells with the highest theoretical energy density, and is generally considered to be a fuel cell which is widely popularized and applied as a proton exchange membrane fuel cell in the future.
Most of the cathode current collector preparation methods of solid oxide fuel cells on the current market are too traditional, so that the traditional cathode current collector preparation process is simple, the finished cathode current collector is easy to lose in different degrees, and the requirements of users cannot be met during preparation.
Disclosure of Invention
The invention provides a preparation method of a cathode current collector of a solid oxide fuel cell, aiming at the defects in the background art.
The invention adopts the following technical scheme to solve the phenomenon, and the preparation method of the cathode current collector of the solid oxide fuel cell comprises the following steps:
s1, weighing the current collector cathode material and a proper amount of copper aluminum foil, then adding alcohol and butanone, and then adding a mixed solvent and a triethanolamine dispersant;
s2, uniformly mixing and processing by using a planetary ball mill, and uniformly mixing under a controllable condition;
s3, after the primary mixing procedure is completed, dibutyl phthalate, a polyvinyl alcohol plasticizer, a polyvinyl butyral binder, a graphite pore-forming agent, a triethanolamine dispersant and the like are added, and secondary mixing processing is performed by ball milling;
s4, filtering by using a screen, treating in vacuum defoaming, and casting on a casting machine;
and S5, stacking and packaging the cut casting film, carrying out hot pressing to obtain a required biscuit, and then assembling the casting biscuit on the cathode of the battery to form the battery cathode current collector in situ.
As a further preferable mode of the present invention, in step S1, the cathode material of the current collector and an appropriate amount of copper aluminum foil are weighed, then alcohol and butanone are added, the mass ratio is kept at 1:1, and then the mixed solvent and the triethanolamine dispersant are added.
In a further preferred embodiment of the present invention, in step S2, kneading is carried out using a planetary ball mill, and kneading is carried out under controlled conditions while maintaining 50Nz at 400r/min, and the ball milling time is 1 hour.
In a further preferred embodiment of the present invention, in step S3, the secondary kneading process is performed by ball milling, and the mixture is kneaded by ball milling for 2 hours at 50Nz using a planetary ball mill.
In a more preferred embodiment of the present invention, in step S4, filtration is performed using a screen, a filtration step using a 60-mesh screen is required, the resulting product is treated in vacuum defoaming, and then cast on a casting machine, and the cast film is dried at 50 ℃ for 3 hours and cut into desired dimensions.
As a further preferable mode of the present invention, in step S5, the casting film is stacked and packaged, then preheated to 75 ℃, and hot-pressed under a pressure of 10-12MPa to obtain a desired biscuit, then the casting biscuit is assembled on the cathode of the battery, simultaneously heated to 600 ℃ and kept warm for 2h, and then heated to 850 ℃ at a speed of 2C/min and kept warm for lh, so as to form the battery cathode current collector in situ.
According to the invention, by adopting the novel special preparation method, the cathode current collector prepared by the tape casting hot-pressing method can effectively collect electrons generated by electrode reaction, the contact interface is improved, the performance of the LSC current collector is very stable under the test condition, the tape casting method prepared by the method has the advantages of simple process, low cost and the like, is very suitable for the preparation work of the battery cathode current collector, has less loss on the prepared cathode current collector, and thus the quality of the obtained finished product cathode current collector is higher.
Drawings
FIG. 1 is a flow chart of the preparation of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that: a preparation method of a cathode current collector of a solid oxide fuel cell comprises the following steps:
s1, weighing the current collector cathode material and a proper amount of copper aluminum foil, then adding alcohol and butanone, and then adding a mixed solvent and a triethanolamine dispersant;
s2, uniformly mixing and processing by using a planetary ball mill, and uniformly mixing under a controllable condition;
s3, after the primary mixing procedure is completed, dibutyl phthalate, a polyvinyl alcohol plasticizer, a polyvinyl butyral binder, a graphite pore-forming agent, a triethanolamine dispersant and the like are added, and secondary mixing processing is performed by ball milling;
s4, filtering by using a screen, treating in vacuum defoaming, and casting on a casting machine;
and S5, stacking and packaging the cut casting film, carrying out hot pressing to obtain a required biscuit, and then assembling the casting biscuit on the cathode of the battery to form the battery cathode current collector in situ.
In step S1, the current collector cathode material and a proper amount of copper aluminum foil are weighed, then alcohol and butanone are added, the mass ratio is kept at 1:1, and then the mixed solvent and the triethanolamine dispersant are added.
In step S2, a planetary ball mill is used for blending, 50Nz and 400r/min are kept, blending is carried out under a controllable condition, and the ball milling time is 1 h.
In step S3, a secondary mixing process is performed by ball milling, and the mixture is mixed by ball milling for 2 hours at 50Nz using a planetary ball mill.
In step S4, the filtration is performed using a screen, and a 60-mesh screen is used as a filtration step, and the filtration step is performed while the casting is performed in vacuum defoaming, and then the casting is performed by placing the casting film on a casting machine, and the casting film is dried at a temperature of 50 ℃ for 3 hours and cut into a desired size.
And (3) preheating the cast film to 75 ℃ after laminating and packaging, carrying out hot pressing under the pressure of 10-12MPa to obtain a required biscuit, assembling the cast biscuit on the cathode of the battery, simultaneously heating to 600 ℃, carrying out heat preservation for 2h, heating to 850 ℃ at the speed of 2C/min, and carrying out heat preservation for lh so as to form the cathode current collector of the battery in situ.
In conclusion, the invention adopts the novel special preparation method, the cathode current collector prepared by the tape casting hot pressing method can effectively collect electrons generated by electrode reaction, the contact interface is improved, the performance of the LSC current collector is very stable under the test condition, the tape casting method has the advantages of simple process, low cost and the like, is very suitable for the preparation work of the cathode current collector of the battery, has less loss on the prepared cathode current collector, and thus, the obtained finished cathode current collector has higher quality, is very suitable for the solid oxide fuel battery, and has wide application prospect.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The preparation method of the cathode current collector of the solid oxide fuel cell is characterized by comprising the following manufacturing steps:
s1, preparing materials: firstly weighing a current collector cathode material and a proper amount of copper aluminum foil, then adding alcohol and butanone, and then adding a mixed solvent and a triethanolamine dispersant;
s2, primary mixing: mixing and processing by using a planetary ball mill, and mixing and processing under a controllable condition;
s3, mixing for the second time: after the primary mixing procedure is finished, dibutyl phthalate, a polyvinyl alcohol plasticizer, a polyvinyl butyral binder, a graphite pore-forming agent, a triethanolamine dispersant and the like are added, and secondary mixing processing is carried out by ball milling;
s4, filtration casting: then filtering by adopting a screen, placing the filter cloth in vacuum defoaming for treatment, and then placing the filter cloth on a casting machine for casting;
s5, hot pressing: and (3) stacking and packaging the cut casting film, carrying out hot pressing to obtain a required biscuit, and then assembling the casting biscuit on the cathode of the battery to form the battery cathode current collector in situ.
2. The method for preparing the cathode current collector of the solid oxide fuel cell according to claim 1, wherein in step S1, the cathode material of the current collector, an appropriate amount of copper-aluminum foil, alcohol and butanone are added in a mass ratio of 1:1, and then the mixed solvent and the triethanolamine dispersant are added.
3. The method of claim 1, wherein in step S2, the blending process is performed by using a planetary ball mill, the mixing process is performed under controlled conditions and the ball milling time is 1h, and the mixing process is maintained at 50Nz and 400 r/min.
4. The method of claim 1, wherein in step S3, the secondary blending process is performed by ball milling, and the mixture is blended by ball milling with a planetary ball mill at 50Nz for 2 h.
5. The method of claim 1, wherein the filtering process is performed by using a 60-mesh screen in step S4, the solid oxide fuel cell cathode current collector is treated by vacuum defoamation, and then cast on a casting machine, the cast film is dried at 50 ℃, and cut into desired size after drying for 3 h.
6. The method of claim 1, wherein in step S5, the casting film is stacked and packaged, then preheated to 75 ℃, and hot pressed under 10-12MPa pressure to obtain a desired biscuit, and then the casting biscuit is assembled on the cathode of the cell, and simultaneously heated to 600 ℃ and kept for 2h, and then heated to 850 ℃ at a speed of 2C/min, and kept for lh, so as to form the cathode current collector of the cell in situ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111028197.6A CN113809348A (en) | 2021-09-02 | 2021-09-02 | Preparation method of cathode current collector of solid oxide fuel cell |
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| CN202111028197.6A CN113809348A (en) | 2021-09-02 | 2021-09-02 | Preparation method of cathode current collector of solid oxide fuel cell |
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| CN113809348A true CN113809348A (en) | 2021-12-17 |
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| CN202111028197.6A Pending CN113809348A (en) | 2021-09-02 | 2021-09-02 | Preparation method of cathode current collector of solid oxide fuel cell |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1685554A (en) * | 2002-05-23 | 2005-10-19 | 阿尔伯达研究理事会股份公司 | Solid oxide fuel cell system |
| JP2006164942A (en) * | 2004-11-15 | 2006-06-22 | Seiko Instruments Inc | Solid polymer electrolyte fuel cell |
| CN104064786A (en) * | 2014-07-17 | 2014-09-24 | 中国科学院上海硅酸盐研究所 | Preparation method of cathode current collector of solid oxide fuel cell |
| US20160087321A1 (en) * | 2014-09-22 | 2016-03-24 | Robert Bosch Gmbh | Separator-Cathode Current Collector Element |
-
2021
- 2021-09-02 CN CN202111028197.6A patent/CN113809348A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1685554A (en) * | 2002-05-23 | 2005-10-19 | 阿尔伯达研究理事会股份公司 | Solid oxide fuel cell system |
| JP2006164942A (en) * | 2004-11-15 | 2006-06-22 | Seiko Instruments Inc | Solid polymer electrolyte fuel cell |
| CN104064786A (en) * | 2014-07-17 | 2014-09-24 | 中国科学院上海硅酸盐研究所 | Preparation method of cathode current collector of solid oxide fuel cell |
| US20160087321A1 (en) * | 2014-09-22 | 2016-03-24 | Robert Bosch Gmbh | Separator-Cathode Current Collector Element |
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