CN101543810B - Device and method for fuel battery coating - Google Patents
Device and method for fuel battery coating Download PDFInfo
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- CN101543810B CN101543810B CN200810300776XA CN200810300776A CN101543810B CN 101543810 B CN101543810 B CN 101543810B CN 200810300776X A CN200810300776X A CN 200810300776XA CN 200810300776 A CN200810300776 A CN 200810300776A CN 101543810 B CN101543810 B CN 101543810B
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- painting cloth
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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
Abstract
The invention discloses a device and a method for fuel battery coating, wherein the coating device comprises a base (1), a platform (2) arranged on the base (1) and a coating cutter (3) moving relatively to the platform. The device is characterized in that the platform (2) is provided with a vacuum absorbing hole (8) connected with a centrifugal blower (7); the lower part of the platform (2) is provided with a heater (13); the coating cutter is provided with a liquid distributor (5) which is connected with a material supplier (6) by a conduction pipe (14). The invention also provides a method for coating on a coating substrate by using the coating device. The invention has the characteristics of easy fixation of carbon paper, synchronous coating and drying processes, uniform and controllable material supply, and the like.
Description
Technical field
The present invention relates to a kind of apparatus for coating, relate in particular to a kind of fuel cell apparatus for coating and coating process.
Background technology
Proton Exchange Membrane Fuel Cells (PEMFC) has advantages such as operating temperature is low, specific power is high, startup is fast, the life-span is long, pollution-free.Wherein membrane electrode (MEA) is its core component, and it is generally by the cathode and anode diffusion layer, and cathode and anode Catalytic Layer and PEM are formed, and it is to fuel cell performance, and stability, durability play a part crucial.
The preparation method of MEA mainly contains thick-layer hydrophobic electrode and two kinds of preparation methods of thin layer hydrophilic electrode.But the gas-diffusion electrode in PEMFC and the general electrochmical power source has very big difference, because of its electrolyte is solid-state ionomer (ionomer), and non-electrolytic solution.Therefore can not make electrolyte infiltrate the inside of porous electrode by means of the surface tension of solution, form three-dimensional reaction zone.In order to make reacting gas reach the surface of eelctro-catalyst through ionomer; Should enlarge ionomer and the contact surface of electrocatalyst particles in the Catalytic Layer as much as possible; The i.e. three-dimensional reaction interval of expansion forms the continuous passage of proton, electronics and reacting gas, will improve ionomer and the interface continuity between the ionomer in the Catalytic Layer in the amberplex simultaneously; Could fully improve the utilization rate of catalyst like this, reduce the resistance of various transmittance process again.Research through research pole catalyze layer dipping different content Nafion shows that when Nafion content was on the low side, the part catalyst failed to contact with Nafion, and catalyst surface does not have ion,
Cause this part catalyst inoperative, catalyst utilization is low, and works as the interior Nafion content of Catalytic Layer for a long time; Unnecessary Nafion can be filled in the gas passage of Catalytic Layer on the one hand, has increased the gas transfer resistance, on the one hand; Too much Nafion can increase the proton exchange film thickness, increases the proton transfer resistance, has improved the internal resistance of cell; Cause battery performance to descend, it is important therefore how uniformly the Nafion layer to be coated on the ten minutes that shows in the Catalytic Layer.
Mentioned the theory of Nafion three-dimensional in the Catalytic Layer in the U.S. Pat 5211984 first, not mentioned for how realizing three-dimensional.Mentioned Nafion three-dimensional coating mainly is to realize through the mode of brushing in other relevant documents and materials, promptly uses soft hairbrush to dip in a little Nafion solution for preparing and brushes on the Catalytic Layer surface.
Owing to lack heating and fixture, and feed must adopt pipette in the apparatus for coating that generally adopts in the prior art, occur phenomenons such as feed and uneven drying be even easily, and carbon paper is difficult for fixing.
Summary of the invention
The purpose of this invention is to provide a kind of fuel cell apparatus for coating, have that carbon paper is easy to fix, a coating and dry run can be carried out synchronously and uniform feeding, characteristics such as controlled.
Another object of the present invention provides a kind of coating process of fuel cell membrane electrode.
Its concrete technical scheme is following: a kind of fuel cell apparatus for coating, and the painting cloth-knife that comprises pedestal, is located at the platform on the pedestal and moves relative to platform, said platform is provided with the vacuum suction hole, and it is connected with centrifugal blower; Be provided with heater between said platform and the pedestal; Said painting cloth-knife is provided with liquid distributor, and it is connected with feeding device through conduit.
Described platform is used for supporting the coating substrate, and negative pressure is taken out through centrifugal blower in the vacuum suction hole that which is provided with, and can fix coating substrates such as carbon paper or carbon cloths; Described vacuum suction hole can be any suitable shape, like circle, and square or triangle etc., it can be uniformly distributed on the said platform, also can be symmetrical distribution.
Described platform can adopt the material of any not yielding, good heat-transfer, and like stainless steel or aluminium etc., its top layer can nickel plating, makes its surfacing.
Described heater can adopt electric heater unit or microwave heating equipment, and its membrane electrode substrate after to coating heats, and makes it can rapid draing; Described heater is positioned at the top of said platform bottom, said pedestal, can be board-like or tubular type, is preferably coiled pipe; Also be provided with painting cloth-knife seesaw knob, coating speed adjusting knob, heater switch and power switch on the said pedestal.
Described painting cloth-knife has the electrodeless variable-speed function, can adjust the coating height, also can adjust the coating height through height adjustment knob is set on painting cloth-knife.
Traditional fuel cell apparatus for coating is owing to adopt pipette to carry out feed, and the feed amount is wayward, if fluid flow is too much; To make slip infiltrate into the coating substrate back, have a strong impact on the coating effect, thereby reduce battery performance; And cause the even phenomenon of crawling easily, feeding device of the present invention is through peristaltic pump slip to be transported in the said conduit; And then through the liquid distributor outflow; Can realize accurate control as required, can guarantee effectively that slip is coated on the coating substrate equably the feed amount, and uniform feeding.
Said liquid distributor linearly shape is arranged, and itself and said painting cloth-knife junction have cavity portion, are used to store slip, and the outflow portion of its underpart is column structure.
A kind of coating process of fuel cell comprises:
1) prepare a certain amount of slip, the back that stirs is for use;
2) open heater switch, the temperature of adjusting said platform is 50～80 ℃, will be coated with substrate and put
On platform, fix through the vacuum suction hole; Regulate the height knob of painting cloth-knife, make its height at 250～550 μ m;
3) start feeding device, the adjusting feeding speed is 2～10mL/min, and slip is dropped on coating substrate one lateral edges through liquid distributor, and regulating painting cloth-knife speed is 1～4m/min, begins coating, when painting cloth-knife arrives coating substrate opposite side, stops coating.
Described slip can be a Nafion solution, and described coating substrate can be an electrode.
But coating process of the present invention is not limited to Nafion solution three-dimensional electrode, also can be used for the preparation of gas diffusion layers and Catalytic Layer.
When being used for the preparation of Catalytic Layer, described slip can be a catalyst slurry, supports or the non-solution that supports like PtM, comprises Nafion solution, PtM/C or PtM, water, dispersant and organic solvent etc., and described coating substrate can be a gas diffusion layers; When being used for the preparation of gas diffusion layers, described slip can be the regulating course slip, comprises carbon dust, solvent and polytetrafluoroethylsolution solution etc., and described coating substrate can be carbon paper, carbon cloth or nickel foam etc.
During operation, at first prepare required slip, the back that stirs is for use; Connect the apparatus for coating power supply then, open heater switch and centrifugal blower, make the temperature of said platform, will be coated with substrate then and be placed on the platform, fix through the vacuum suction hole at 50～80 ℃; The rotary coating cutter knob that seesaws makes painting cloth-knife be close to coating substrate one side; Regulate the height knob of painting cloth-knife, make its height, start the peristaltic pump feeding speed and be adjusted in 2～10mL/min at 250～550 μ m; Solution is dropped on coating substrate one lateral edges through liquid distributor; Regulate painting cloth-knife speed at 1～4m/min, begin coating, when painting cloth-knife arrives coating substrate opposite side, stop coating.Heighten painting cloth-knife height knob, make it return initial coating substrate one side, will be coated with substrate rotation 90 degree after, will be coated with and highly be adjusted to than being coated with highly high 10～50 μ m last time, be coated with next time, carrying capacity reaches requirement of experiment on slip.
Compared with prior art, the present invention is simple to operate, fast, slip is evenly distributed on the coating substrate, and precision is high, and collimation is good, and the slip loss amount is little.
Description of drawings
Fig. 1 is a fuel cell apparatus for coating structural representation of the present invention;
Fig. 2 is the heater structural representation of the preferred embodiments of the present invention;
Fig. 3 is the heater structural representation of another preferred embodiment of the present invention;
Fig. 4 is the liquid distributor cutaway view of the preferred embodiments of the present invention.
The specific embodiment
Pass through embodiment below, and combine accompanying drawing, technical scheme of the present invention is done further detailed explanation, but be not limited to content of the present invention.
Like Fig. 1,2, shown in 3 or 4, a kind of fuel cell apparatus for coating comprises pedestal 1, platform 2 and the painting cloth-knife 3 that moves relative to platform, is evenly distributed with vacuum suction hole 8 on the said platform 2, and it is connected with centrifugal blower 7; Said platform 2 bottoms are provided with heater 13; Said painting cloth-knife 3 is provided with liquid distributor 5, and it is connected with peristaltic pump 6 through conduit 14; Said liquid distributor 5 linearly shape is arranged, and itself and said painting cloth-knife 3 junctions have the cavity portion that stores slip, and the outflow portion of its underpart is column structure.
Described platform 2 is stainless steel or aluminum, its top layer nickel plating; Described vacuum suction hole 8 is circular, square or triangle, and it can be uniformly distributed on the said platform, also can be symmetrical distribution.
Described heater 13 is electric heater unit or microwave heating equipment, and it can be board-like or tubular type, is preferably coiled pipe; Also be provided with painting cloth-knife seesaw knob 12, coating speed adjusting knob 11, heater switch 10 and power switch 9 on the said pedestal 1; Described feeding device 6 is through peristaltic pump slip to be transported in the said conduit, and then flows out through liquid distributor 5.
In the Nafion of 5wt% solution, add deionized water, the back that stirs is for use; Connect the apparatus for coating power supply, open heater switch 10 and centrifugal blower 7, make that the temperature of said platform 2 is 80 ℃, will be coated with substrate then and be placed on the platform 2, fixing through vacuum suction hole 8; The rotary coating cutter knob 12 that seesaws makes painting cloth-knife 3 be close to electrode one side, regulates the height knob 4 of painting cloth-knife 3, makes its height at 250 μ m; Start peristaltic pump 6; Feeding speed is adjusted in 6mL/min, and Nafion solution is dropped on electrode one lateral edges through liquid distributor 5, regulates painting cloth-knife speed at 1m/min; Begin coating, when painting cloth-knife arrives the electrode opposite side, stop coating.Heighten painting cloth-knife height knob 4, make it return initial coating substrate one side, will be coated with 90 ℃ of substrate rotations after, will be coated with and highly be adjusted to than being coated with highly high 50 μ m last time, be coated with next time, carrying capacity reaches requirement of experiment on Nafion solution.
Get 14g carbon black (Cabot company; Vulcan XC-72), grind the back with grinder and add 200gl, 2-propane diols; Slowly stirred the back ultrasonic dispersing 30 minutes; The PTFE emulsion that adds 30g 20wt% more slowly stirred under the frozen water cooling condition ultrasonic dispersion 30 minutes at glass bar, made the regulating course slip; Connect the apparatus for coating power supply then, open heater switch 10 and centrifugal blower 7, make the temperature of said platform 2, then carbon paper is placed on the platform 2 at 50 ℃, fixing through vacuum suction hole 8; The rotary coating cutter knob 12 that seesaws makes painting cloth-knife 3 be close to carbon paper one side, regulates the height knob 4 of painting cloth-knife 3, makes its height at 550 μ m; Start peristaltic pump 6; Feeding speed is adjusted in 2mL/min, and slip is dropped on carbon paper one lateral edges through liquid distributor 5, regulates painting cloth-knife speed at 4m/min; Begin coating, when painting cloth-knife arrives the carbon paper opposite side, stop coating.All the other are with embodiment 1.
With PtRu/C catalyst, Nafion solution, ptfe emulsion, deionized water and polyvinyl alcohol according to 3: 1: 1: 300: 0.3 mixed makes the Catalytic Layer slip; Connect the apparatus for coating power supply then, open heater switch 10 and centrifugal blower 7, make the temperature of said platform 2, then gas diffusion layers is placed on the platform 2 at 65 ℃, fixing through vacuum suction hole 8; The rotary coating cutter knob 12 that seesaws makes painting cloth-knife 3 be close to gas diffusion layers one side, regulates the height knob 4 of painting cloth-knife 3, makes its height at 350 μ m; Start peristaltic pump 6; Feeding speed is adjusted in 10mL/min, and slip is dropped on coating substrate one lateral edges through liquid distributor 5, regulates painting cloth-knife speed at 2m/min; Begin coating, when painting cloth-knife arrives the gas diffusion layers opposite side, stop coating.All the other are with embodiment 1.
But apparatus for coating of the present invention and coating process are not limited to the preparation of electrode, Catalytic Layer and gas diffusion layers, and every embodiment that is suitable for apparatus for coating according to the invention and coating process all drops within protection scope of the present invention.
Claims (10)
1. fuel cell apparatus for coating, the painting cloth-knife (3) that comprises pedestal (1), is located at the platform (2) on the pedestal and moves relative to platform is characterized in that said platform (2) is provided with vacuum suction hole (8), it is connected with centrifugal blower (7); Be provided with heater (13) between said platform (2) and the pedestal (1); Said painting cloth-knife (3) is provided with liquid distributor (5), and it is connected with feeding device (6) through conduit (14); Described feeding device (6) is a peristaltic pump.
2. fuel cell apparatus for coating according to claim 1 is characterized in that described vacuum suction hole (8) is circle, square or triangle.
3. fuel cell apparatus for coating according to claim 1 is characterized in that described vacuum suction hole (8) is symmetrically distributed on the said platform (2) for evenly distributing or being.
4. fuel cell apparatus for coating according to claim 1 is characterized in that described heater (13) is electric heater unit or microwave heating equipment.
5. according to claim 1 or 4 described fuel cell apparatus for coating, it is characterized in that described heater (13) is board-like or tubular type.
6. fuel cell apparatus for coating according to claim 5 is characterized in that described heater (13) is a coiled pipe.
7. fuel cell apparatus for coating according to claim 1 is characterized in that described pedestal (1) is provided with painting cloth-knife seesaw knob (12), coating speed adjusting knob (11), heater switch (10) and power switch (9).
8. fuel cell apparatus for coating according to claim 1 is characterized in that linearly shape arrangement of said liquid distributor (5), and itself and said painting cloth-knife junction have cavity portion, and the outflow portion of its underpart is column structure.
9. the coating process of a fuel cell comprises: 1) prepare a certain amount of slip, the back that stirs is for use; 2) open heater switch, the temperature of adjustment platform is 50～80 ℃, will be coated with substrate and be placed on the platform, fixes through the vacuum suction hole, regulates the height knob of painting cloth-knife, makes its height at 250～550 μ m; 3) start feeding device, the adjusting feeding speed is 2～10mL/min, and slip is dropped on coating substrate one lateral edges through liquid distributor, and regulating painting cloth-knife speed is 1～4m/min, begins coating, when painting cloth-knife arrives coating substrate opposite side, stops coating.
10. fuel cell coating process according to claim 9 is characterized in that described slip is Nafion solution, catalyst slurry or regulating course slip, and described coating substrate is electrode, gas diffusion layers or carbon paper, carbon cloth, nickel foam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810300776XA CN101543810B (en) | 2008-03-28 | 2008-03-28 | Device and method for fuel battery coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810300776XA CN101543810B (en) | 2008-03-28 | 2008-03-28 | Device and method for fuel battery coating |
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| Publication Number | Publication Date |
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| CN101543810A CN101543810A (en) | 2009-09-30 |
| CN101543810B true CN101543810B (en) | 2012-04-18 |
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| CN200810300776XA Active CN101543810B (en) | 2008-03-28 | 2008-03-28 | Device and method for fuel battery coating |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102101085B (en) * | 2009-12-16 | 2012-12-05 | 中国科学院大连化学物理研究所 | Automatic spraying device for preparing fuel cell membrane electrode |
| CN101811106B (en) * | 2010-04-14 | 2012-11-14 | 深圳南玻显示器件科技有限公司 | Device and method for coating antifouling film |
| CN102019251B (en) * | 2010-11-25 | 2012-11-21 | 深圳市豪鹏科技有限公司 | Rubber dip machine |
| CN102716838B (en) * | 2012-06-18 | 2015-08-05 | 深圳市合川科技有限公司 | A kind of full automatic oily limit machine |
| CN102716839B (en) * | 2012-06-18 | 2014-07-09 | 深圳市合川科技有限公司 | Automatic oil edging machine with accurate positioning |
| KR102001470B1 (en) * | 2016-10-12 | 2019-10-01 | 한국과학기술연구원 | Composite polymer electrolyte membrane for fuel cell, and method of manufacturing the same |
| CN108672223A (en) * | 2018-07-16 | 2018-10-19 | 苏州黎元新能源科技有限公司 | A kind of slit-type squash type coating apparatus and its substrate platform |
| CN111790572A (en) * | 2020-07-01 | 2020-10-20 | 东风汽车集团有限公司 | Proton membrane fixing device for double-side coating |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1365302A (en) * | 1999-07-29 | 2002-08-21 | 中外炉工业株式会社 | Circular or annular coating film forming method |
| CN201036926Y (en) * | 2007-04-23 | 2008-03-19 | 比亚迪股份有限公司 | Silk-screen printing equipment |
| CN201154346Y (en) * | 2007-12-28 | 2008-11-26 | 汉能科技有限公司 | Coating equipment for fuel cell |
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2008
- 2008-03-28 CN CN200810300776XA patent/CN101543810B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1365302A (en) * | 1999-07-29 | 2002-08-21 | 中外炉工业株式会社 | Circular or annular coating film forming method |
| CN201036926Y (en) * | 2007-04-23 | 2008-03-19 | 比亚迪股份有限公司 | Silk-screen printing equipment |
| CN201154346Y (en) * | 2007-12-28 | 2008-11-26 | 汉能科技有限公司 | Coating equipment for fuel cell |
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| CN101543810A (en) | 2009-09-30 |
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Owner name: HANERGY SOLAR PHOTOVOLTAIC TECHNOLOGY LIMITED Free format text: FORMER NAME: HANERGY TECHNOLOGY CO., LTD. |
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Address after: 100107 Beijing Chaoyang District Anli Road No. 0-A Patentee after: Hanenergy Solar Photovoltaic Technology Co.,Ltd Address before: 102209 Beijing city Changping District Hongfu Pioneer Park No. 15 hospital Patentee before: Hanergy Technology Co., Ltd. |