CN1414646A - Method of using metallic conductive glue to proceed solid oxide fuel cell fast sealing - Google Patents
Method of using metallic conductive glue to proceed solid oxide fuel cell fast sealing Download PDFInfo
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- CN1414646A CN1414646A CN02133049A CN02133049A CN1414646A CN 1414646 A CN1414646 A CN 1414646A CN 02133049 A CN02133049 A CN 02133049A CN 02133049 A CN02133049 A CN 02133049A CN 1414646 A CN1414646 A CN 1414646A
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- sealing
- fuel cell
- conductive adhesive
- oxide fuel
- solid oxide
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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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Abstract
A quick sealing-in method for solid-oxide fuel cell by using metal conducting resin uses the silver conducting resin as a sealing-in material to finish the sealing-in process flow step as follows: graduation treatment for sealing-in body joining, drying, sealing and redrying. The graduation is to flatten the surface of sealing-in area by mechanical grinding, filling and polishing, the joining is to coat the silver conducting resin of 0.5-1 mm thickness at the sealing-in area and to pack the electrolyte or component with the structural member to be connected together, the drying is to be carried out at the temperature of 100-200 degree C for 20-60 min. To use silver conducting resin as a sealing-in material, the binding strength between the components and excellent airtightness at both of high and low temperature areas can be ensured.
Description
Technical field
The invention belongs to a kind of method for sealing of Solid Oxide Fuel Cell (SOFC), particularly use silver conductive adhesive the electrolyte of Solid Oxide Fuel Cell or the sealing-in between device and other members.
Background technology
The background technology close with the present invention is Chinese invention patent application " the high temperature seal, sealing materials and the sealing technology of Solid Oxide Fuel Cell ", application number: 99104482.7, and April 23 1999 applying date.Sealing-in ceramic powder material and outer sealing-in vitreous material in this patent application is adopted are realized the electrolyte of Solid Oxide Fuel Cell or the sealing-in between device and other members.Sealing-in comprise material preparation, clean processes such as sealing-in district, sealing-in, high-temperature process.
The SOFC method for sealing of background technology, though can obtain the respond well battery of sealing-in,, use various ingredients to add bonding agent, solvent grinding through the preparation of inside and outside two kinds of sealing-in materials, be pretty troublesome; Sealing-in will be carried out in two steps, " leave standstill ", " drying in the shade ", so the process time is long; Also pyroprocess (1000～1100 ℃) to be passed through, the sealing-in of battery could be realized.Because using silicate is seal, sealing materials, not only there are problems such as complex process, process time are long, but also have heat coupling difficulty, the sealing-in success rate is low, easily and variety of issue such as battery device generation adverse chemical reaction, very is not suitable for the battery sealing-in.
Summary of the invention
The technical problem to be solved in the present invention is, finds a kind of metallic conduction glue to be used for the sealing-in of Solid Oxide Fuel Cell, makes that technical process is simple, sealing-in time spent is short, needn't high temperature sintering, is assembled at low temperatures (below 200 ℃) airtight fuel cell.
Seal, sealing materials of the present invention is a silver conductive adhesive, and silver conductive adhesive is used to make electrode usually, and its component comprises silver powder, is made up of bismaleimide resin modified epoxy bonding agent, solvent, curing agent etc.This silver conductive adhesive is public already, can buy at any time in commodity market.
Among the present invention, silver conductive adhesive is used for the electrolyte of Solid Oxide Fuel Cell or the sealing-in between device and other members.
Make seal, sealing materials with silver conductive adhesive, needn't use two kinds of seal, sealing materials, avoided the process of " material preparation ", price is also low than noble metal.Also because the battery sealing-in leans on the organic adhesive in the conducting resinl to seal in low-temperature zone (below 400 ℃), high temperature section (more than 400 ℃) is by silver-colored particulate generation sintered body sealing, by the pliability buffering electrolyte of argent or the thermal stress between device and other members, so bonding secure seal is good.Make seal, sealing materials with silver conductive adhesive, can not only guarantee the adhesion strength between good air-tightness and device, also have simultaneously seal, sealing materials in device surface adhere to well, chemical property is stable and the low advantage of thermal stress.
Use silver conductive adhesive of the present invention carries out the method for solid oxide fuel cell fast sealing, comprises that the technology of graduation processing---joint---oven dry is finished the electrolyte of Solid Oxide Fuel Cell or the sealing-in between device and other members.Said graduation is handled, and before sealing-in, adopts the method for mechanical grinding, polishing or filling, polishing that the zone that needs sealing-in is processed, and obtains the process of flat surface; Said joint is that brushing thickness then, is fitted together electrolyte or device at the silver conductive adhesive of 0.5～1mm with the member that is connected on electrolyte or device and other member sealing regions, finishes the joint of fuel cell component; Said oven dry is, the battery component that has engaged is placed in drying box or the electric furnace, and the control temperature is at 100～200 ℃, the process of experience 20～60min.
Aforesaid sealing-in process can once be finished the sealing-in to battery at low temperatures.In order to obtain better sealing effectiveness, can after oven dry, carry out once " sealing---secondary drying " process again.Said sealing is at the junction of parts brushing silver conductive adhesive, makes it fill the process in full parts surface space and gully; Said oven dry again is to carry out once identical with drying course process.
Compare with existing sealing-in mode, mainly saved high-temperature sintering process, replace the oven dry of low temperature, not only make work simplification, also owing to reduced the thermal cycle process of sealing-in, the coefficient of expansion of the different components material problem of the excessive thermal stress damage device (particularly thin-walled device) that causes that do not match in the time of can be because of heating and cooling, the time of sealing-in shortened to about one hour from nearly ten hours, and the success rate height.The silver conductive adhesive that sealing-in is used is the commercialization material that is easy to get, and has not only saved the preparation of seal, sealing materials, and has reduced cost.Therefore because Ag adheres to preferably with oxide ceramics in the various metals, selects for use Ag can improve the adhesion property of seal, sealing materials and oxide ceramics device greatly.Because the fusing point of Ag is 961 ℃ (1238K), the point of incipient sintering begins sintering at 400～500 ℃ before can volatilizing, burnout at binding agent, effectively prevents to stay the gas leakage that hole causes because of the binding agent volatilization.Sealing is realized by Ag in high-temperature region (500 ℃), and low-temperature space (500 ℃) is following by the sealing of the organic substance in the silver paste, can realize the reasonable link of the two like this, good sealing effect.Because the formed sealing region of silver paste sealing-in finally is to be close to fine and close silver by the polycrystalline that short grained silver sinters into to form, and silver is as the less metal of a kind of modulus of elasticity, when thermal stress occurring, can lean on by a relatively large margin modification relief of thermal stress to the effect of different parts, avoid the device failure of thin-walled because of heating and cooling.As the good conductor of heat, silver-colored seal, sealing materials is fast to the thermal shock diffusion, can also prevent that ceramic component is damaged too greatly because of the temperature difference.In addition, under the situation of needs conduction, Ag can also realize the connection of circuit as the good conductor of electricity; Battery sealing-in and battery are worked first once to be finished.
Embodiment
The sealing-in of the small-sized monocell of embodiment 1 slab construction
YSZ sheet (diameter 13mm with the dry pressing preparation, thick about 1mm, 1300～1400 ℃ of sintering 8h) be the electrolyte device, with silver is electrode and lead-in wire, with alumina tube (external diameter 12mm, internal diameter 8mm) is conduit, handles that------program and condition that oven dry---sealing---is dried are again carried out sealing-in to joint according to graduation.The monocell sample of finishing sealing-in connects the lead-in wire circuit, puts into high-temperature electric resistance furnace and carries out the monocell test, with H
2Be fuel, airborne O
2Be oxidant, measure the open circuit voltage of battery under the different operating temperature, compare with theoretical value.The result shows that the open circuit voltage of battery shows that very near theoretical value gas leakage does not take place sealing region, has reached the Expected Results of sealing-in.
The sealing-in of embodiment 2 series batteries
Utilize graduation of the present invention to handle and---engage that---program and condition that oven dry---sealing---is dried are carried out sealing-in to the battery pack of conical tube structure, utilize the method for embodiment 1 to connect and handle, and test at 800～900 ℃ again.The result shows that the open circuit voltage of 20 joint series batteries reaches 19V, power output 5.86W.
Claims (3)
1, a kind of purposes of silver conductive adhesive is characterized in that, is used for the electrolyte of Solid Oxide Fuel Cell or the sealing-in between device and other members.
2, a kind of method of using silver conductive adhesive to carry out solid oxide fuel cell fast sealing, the process that comprises joint, it is characterized in that, use silver conductive adhesive to make seal, sealing materials, handle the technology of---joint---oven dry through graduation and finish the electrolyte of Solid Oxide Fuel Cell or the sealing-in between device and other members; Said graduation is handled, and before sealing-in, adopts the method for mechanical grinding, polishing or filling, polishing that the zone that needs sealing-in is processed, and obtains the process of flat surface; Said joint is that brushing thickness then, is fitted together electrolyte or device at the silver conductive adhesive of 0.5～1mm with the member that is connected on electrolyte or device and other member sealing regions, finishes the joint of fuel cell component; Said oven dry is, the battery component that has engaged is placed in drying box or the electric furnace, and the control temperature is at 100～200 ℃, the process of experience 20～60min.
3, carry out the method for solid oxide fuel cell fast sealing according to the described use silver conductive adhesive of claim 2, it is characterized in that, after oven dry, seal again---the secondary drying process; Said sealing is at the junction of parts brushing silver conductive adhesive, makes it fill the process in full parts surface space and gully; Said oven dry again is to carry out once identical with drying course process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021330492A CN1180493C (en) | 2002-09-25 | 2002-09-25 | Method of using metallic conductive glue to proceed solid oxide fuel cell fast sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021330492A CN1180493C (en) | 2002-09-25 | 2002-09-25 | Method of using metallic conductive glue to proceed solid oxide fuel cell fast sealing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1414646A true CN1414646A (en) | 2003-04-30 |
| CN1180493C CN1180493C (en) | 2004-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021330492A Expired - Fee Related CN1180493C (en) | 2002-09-25 | 2002-09-25 | Method of using metallic conductive glue to proceed solid oxide fuel cell fast sealing |
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| CN (1) | CN1180493C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100340020C (en) * | 2005-01-28 | 2007-09-26 | 中国科学院大连化学物理研究所 | Metal bipolar plate used for proton exchange film fuel cell and preparative method |
| CN100397693C (en) * | 2005-07-26 | 2008-06-25 | 比亚迪股份有限公司 | Fuel cell guding polar plate and working method thereof |
| CN106299399A (en) * | 2016-11-02 | 2017-01-04 | 山西大学 | SOFC compound seal, sealing materials and battery method for sealing |
| CN109904485A (en) * | 2017-12-07 | 2019-06-18 | 中国科学院大连化学物理研究所 | A kind of encapsulating method of fuel cell water guide bipolar plates |
| CN110190210A (en) * | 2019-03-12 | 2019-08-30 | 华电电力科学研究院有限公司 | A kind of solid oxide fuel cell structure convenient for edge sealing-in |
-
2002
- 2002-09-25 CN CNB021330492A patent/CN1180493C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100340020C (en) * | 2005-01-28 | 2007-09-26 | 中国科学院大连化学物理研究所 | Metal bipolar plate used for proton exchange film fuel cell and preparative method |
| CN100397693C (en) * | 2005-07-26 | 2008-06-25 | 比亚迪股份有限公司 | Fuel cell guding polar plate and working method thereof |
| CN106299399A (en) * | 2016-11-02 | 2017-01-04 | 山西大学 | SOFC compound seal, sealing materials and battery method for sealing |
| CN109904485A (en) * | 2017-12-07 | 2019-06-18 | 中国科学院大连化学物理研究所 | A kind of encapsulating method of fuel cell water guide bipolar plates |
| CN109904485B (en) * | 2017-12-07 | 2022-01-04 | 中国科学院大连化学物理研究所 | Sealing method of fuel cell water guide bipolar plate |
| CN110190210A (en) * | 2019-03-12 | 2019-08-30 | 华电电力科学研究院有限公司 | A kind of solid oxide fuel cell structure convenient for edge sealing-in |
| CN110190210B (en) * | 2019-03-12 | 2024-05-24 | 华电电力科学研究院有限公司 | Solid oxide fuel cell structure convenient for edge sealing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1180493C (en) | 2004-12-15 |
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