CN101577318A - Sealing material for cell stack, sealing structure for fuel cell stack and making method thereof - Google Patents
Sealing material for cell stack, sealing structure for fuel cell stack and making method thereof Download PDFInfo
- Publication number
- CN101577318A CN101577318A CNA200810061478XA CN200810061478A CN101577318A CN 101577318 A CN101577318 A CN 101577318A CN A200810061478X A CNA200810061478X A CN A200810061478XA CN 200810061478 A CN200810061478 A CN 200810061478A CN 101577318 A CN101577318 A CN 101577318A
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- glass ceramics
- crystalline material
- stainless steel
- monocell
- sealing
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- 239000000446 fuel Substances 0.000 title claims abstract description 22
- 238000007789 sealing Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000003566 sealing material Substances 0.000 title claims abstract 6
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 24
- 239000002241 glass-ceramic Substances 0.000 claims abstract description 23
- 239000010935 stainless steel Substances 0.000 claims abstract description 23
- 239000002178 crystalline material Substances 0.000 claims abstract description 22
- 239000008393 encapsulating agent Substances 0.000 claims description 41
- 239000002131 composite material Substances 0.000 claims description 12
- 235000013619 trace mineral Nutrition 0.000 claims description 8
- 239000011573 trace mineral Substances 0.000 claims description 8
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 7
- 239000000565 sealant Substances 0.000 claims description 5
- 229910052725 zinc Inorganic materials 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000003698 laser cutting Methods 0.000 claims description 2
- -1 monocell Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 abstract description 10
- 238000012360 testing method Methods 0.000 abstract description 6
- 238000009736 wetting Methods 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 229910001233 yttria-stabilized zirconia Inorganic materials 0.000 description 10
- 238000005245 sintering Methods 0.000 description 6
- 229910002119 nickel–yttria stabilized zirconia Inorganic materials 0.000 description 5
- 238000000429 assembly Methods 0.000 description 4
- 230000000712 assembly Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 238000012876 topography Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002389 environmental scanning electron microscopy Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000010965 430 stainless steel Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005382 thermal cycling Methods 0.000 description 1
Images
Classifications
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention relates to a sealing material for cell stack, which adopts glass ceramic non-crystalline materials comprising the following components by weight percentage: 10-17 of Al2O3, 35-55 of SiO2 and 28-38 of CaO. The invention further discloses the application structure of the sealing material for the cell stack in a solid oxide fuel cell stack and a corresponding making method. Compared with the prior art, the invention has the advantages that the invention is suitable for sealing between the low-and-medium temperature solid oxide fuel cell stack monocell and stainless steel middle connecting pieces, and between the stainless steel middle connecting pieces; the favorable interface wetting performance of sealing materials and SUS430 stainless steel shows that the thermal circulation sealing performance is excellent; the sealing structure for the cell stack made by the invention has long-time and stable cell voltage and excellent thermal circulation performance obtained by the test.
Description
Technical field
The present invention relates to a kind of battery pile encapsulant, the invention still further relates to application structure and the manufacture method of this battery pile encapsulant in the low-temperature solid oxide fuel cell heap.
Background technology
In the plate solid-oxide fuel cell stack, the sealing between monocell and stainless steel intermediate connector, intermediate connector and other assemblies improves battery open circuit voltage and has great importance for the leakage that prevents fuel and oxidizing gas.High temperature solid oxide fuel cell is in the hot operation process, and the seal request between monocell and metal connecting piece and other assemblies has close thermal coefficient of expansion and chemical compatibility.Therefore, invent the close compound seal method of a kind of stable performance, thermal coefficient of expansion and monocell and have important effect.
Existing disclosed patent is encapsulant as described encapsulating methods such as CN 1825672A, CN 1649186A, CN 1494176A, CN 1599092A by the mixture that adopts devitrified glass, glass basis and ceramic fibre to form etc.Yet, existing encapsulant technology is in Solid Oxide Fuel Cell thermal cycle process, because the difference of thermal coefficient of expansion and the instability of chemical stability, cause occurring in the fuel cell operation process that the gap appears in encapsulant and seal member, sealant surface is peeled off or the battery problems of crack.So require further improvement and design.
The applicant adopt glass ceramics+thermal cycle+Solid Oxide Fuel Cell (Ceramic glass+Thermalcycling+Solid oxide fuel cell) as keyword retrieval " metal digest " (Metals Abstracts) of the U.S., the U.S. " engineering abstract and indexing " (EI), " CNKI " and the scientific and technical literature index such as " tieing up general Chinese periodical database " of China, all do not find complete pertinent literature.The applicant has also retrieved United States Patent (USP) digest and European patent digest (EP﹠amp; PCT) do not find patent family with " Chinese patent information network " yet.
Summary of the invention
First technical problem to be solved by this invention be provide at the above-mentioned state of the art a kind of in, battery pile encapsulant between low-temperature solid oxide fuel cell monocell and stainless steel adapting piece, stainless steel adapting piece and other assemblies.
Another technical problem to be solved by this invention provides a kind of solid-oxide fuel battery stack sealing structure.
Another technical problem to be solved by this invention provides a kind of manufacture method of solid-oxide fuel battery stack sealing structure.
The present invention solves the technical scheme that above-mentioned primary technical problem adopts: a kind of battery pile encapsulant, adopt the glass ceramics non-crystalline material, and this glass ceramics non-crystalline material includes the component of following parts by weight proportioning
Al
2O
3 10～17；
CaO 28～38。
As improvement, described glass ceramics non-crystalline material comprises that trace element is Zn or F.
Best proportioning is:
Al
2O
3 14；
SiO
2 47.9；
CaO 34.8；
Other are trace element 3.3 inevitably.
The present invention solves above-mentioned second technical scheme that technical problem adopted: a kind of solid-oxide fuel battery stack sealing structure, comprise monocell and be located at the intermediate connector of monocell both sides respectively, it is characterized in that being equipped with between aforementioned monocell both sides and the intermediate connector sealed composite assembly, the sealing composite component is made up of stainless steel space bar and the glass ceramics non-crystalline material that is pasted on stainless steel space bar both sides.
The present invention solves above-mentioned the 3rd technical scheme that technical problem adopted: a kind of manufacture method of fuel battery stack sealing structure comprises
A, adopt laser cutting machine respectively with the glass ceramics non-crystalline material, monocell, stainless steel intermediate connector and space bar are cut into the battery pile component;
B, the glass ceramics non-crystalline material is fixed in stainless steel space bar both sides forms the sealed composite assembly;
C, again the sealed composite assembly is pasted on monocell and the intermediate connector;
D, after upper and lower cover plate precompressed, place heating furnace to heat up, carry out pressure then in the temperature-rise period and regulate, after temperature is raised to 840～860 ℃ insulation promptly salable, preferred 850 ℃, sealant thickness is less than 1mm.
As improvement, it is as follows that the glass ceramics non-crystalline material is fixed in stainless steel space bar both sides actual conditions among the step b: place heating furnace, under the pressure of 4～6kg according to 4～6 ℃/min (℃ 1.5～2.5 hours (preferred 2 hours) of insulation, (preferred 850 ℃) back, preferred 5 ℃/min) temperature programming to 840～850, and carry out 2～4 thermal cycles.Carrying out pressure in the described temperature-rise period of steps d regulates and to be specially: under the pressure of 4～6kg according to (preferred 5 ℃/min) ℃ 1.5～2.5 hours (preferred 2 hours) of insulation, (preferred 850 ℃) back, temperature programming to 840～860, and carry out 2～4 thermal cycles (preferred 3 times) of 4～6 ℃/min.
Compared with prior art, the invention has the advantages that: the present invention is applicable to the sealing between intermediate temperature solid oxide fuel cell heap monocell and stainless steel intermediate connector, the stainless steel intermediate connector, as Ni-YSZ/YSZ/LSM-YSZ and 430 stainless steel intermediate connectors, Crofer 22 APU stainless steels etc., the new method that The present invention be directed to, seals between low-temperature solid oxide fuel cell monocell and stainless steel adapting piece, stainless steel adapting piece and other assemblies, but battery pile sealing formed with thermal circulation performance; After the making after tested, the encapsulant element does not diffuse into monocell through behind the high temperature, show that encapsulant can not produce destruction to the monocell performance, the stainless interface wet ability of encapsulant and SUS430 can be good, shows to have excellent thermal cycle sealing property; The battery pile hermetically-sealed construction test of being made by the present invention obtains long-time stable cell voltage and excellent thermal circulation performance.
Description of drawings
Fig. 1 is 200 ℃ of high temperature images of the encapsulant collection of illustrative plates without oversintering.
Fig. 2 is 750 ℃ of high temperature images of the encapsulant collection of illustrative plates without oversintering.
Fig. 3 is 800 ℃ of high temperature images of the encapsulant collection of illustrative plates without oversintering.
Fig. 4 is 850 ℃ of high temperature images of the encapsulant collection of illustrative plates without oversintering.
Fig. 5 is 200 ℃ of high temperature images of the encapsulant collection of illustrative plates through oversintering.
Fig. 6 is 800 ℃ of high temperature images of the encapsulant collection of illustrative plates through oversintering.
Fig. 7 is 850 ℃ of high temperature images of the encapsulant collection of illustrative plates through oversintering.
Fig. 8 is 900 ℃ of high temperature images of the encapsulant collection of illustrative plates through oversintering.
Fig. 9 is for through the XRD diffraction of thermal cycle sintering forward and backward encapsulant figure as a result.
Figure 10 is the interface topography figure of encapsulant and Ni-YSZ/YSZ/LSM-YSZ monocell.
Figure 11 is encapsulant and the Ni-YSZ/YSZ/LSM-YSZ monocell distribution diagram of element at the interface.
Figure 12 is the interface topography figure of encapsulant and SUS430 stainless steel intermediate connector.
Figure 13 is the battery pile sealed structural representation.
Figure 14 piles voltage tester figure as a result for element cell is short.
Figure 15 is the short heap of element cell thermal cycle test result figure.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Example one
But the performance test of battery pile thermal cycle encapsulant.The main component ratio of encapsulant is the Al of 14wt.%
2O
3, the CaO of 34.8wt.%, the SiO of 47.9wt.%
2, other trace elements 3.3%, wherein trace element can comprise Zn or F.To be suppressed into the small column of Φ 6 * 8mm through the forward and backward encapsulant of thermal cycle, be placed in the SJY high temperature image sintering instrument,, the softening performance before and after its sintering be observed according to 5 ℃/min temperature programming to 900 ℃.Fig. 1 to Fig. 4 is that the high temperature image before the sintering shows collection of illustrative plates, and as can be seen from the figure, encapsulant has softening sign at 800 ℃, and is softening fully after 850 ℃.Fig. 5 to Fig. 8 shows collection of illustrative plates for the high temperature image through the thermal cycle sintering, and the result shows through the encapsulant behind the oversintering softening during at 900 ℃.Fig. 9 is through 850 ℃ of XRD diffraction that sintering is forward and backward, and result's demonstration is amorphous phase.The above results shows that this kind encapsulant has good thermal circulation performance when being lower than 850 ℃.The main component ratio of the encapsulant in the present embodiment can expand following components in weight percentage scope: Al to
2 O
310～17%; SiO
235～55%; CaO28～38%.
Example two
The interface of encapsulant and monocell Ni-YSZ/YSZ/LSM-YSZ is wetting.In order to carry out to test, encapsulant is pasted on the monocell both sides with the interface wet ability of encapsulant and the plate monocell Ni-YSZ/YSZ/LSM-YSZ of anode-supported.With being placed in the heating furnace, under the pressure of 4～6kg according to insulation after the temperature programming to 850 of 5 ℃/min ℃ 2 hours, and carry out three thermal cycles.After experiment end stove to be heated slowly cools to room temperature, adopt ESEM that its interface topography is observed, and the element at its interface is analyzed, the result is shown in Fig. 5,6.10 as can be seen from figure, and after three thermal cycles, the interface wet ability of this kind encapsulant and monocell can be good, shows to have excellent thermal cycle sealing property.As can be seen from Figure 11, this kind encapsulant element does not diffuse into monocell through behind the high temperature, shows that encapsulant can not produce destruction to the monocell performance, and sealant thickness is about 100 μ m.
Example three
The stainless interface of encapsulant and SUS430 is wetting.Seal glass in the example one is pasted on the thick SUS430 stainless steel both sides of 0.3mm.With being placed in the heating furnace, under the pressure of 4～6kg according to insulation after the temperature programming to 850 of 5 ℃/min ℃ 2 hours, and carry out three thermal cycles.After experiment end stove to be heated slowly cools to room temperature, adopt ESEM that its interface topography is observed, the result as shown in figure 12.As can be seen from the figure, after three thermal cycles, the stainless interface wet ability of this kind encapsulant and SUS430 can be good, shows to have excellent thermal cycle sealing property.
Example four
Element cell short heap design of Sealing Structure and thermal cycle sealing test.But adopt the thermal cycle encapsulant in the example one, itself and battery pile component are designed to the structure of convection current or X-shape, as shown in figure 13, and the short heap of module units battery is tested.Sealed composite assembly 5 is a glass ceramics non-crystalline material 3+ stainless steel space bar 2+ glass ceramics non-crystalline material 3, and then the short heap of element cell hermetically-sealed construction is an intermediate connector 4+ sealed composite assembly 5+ monocell 1+ sealed composite assembly 5+ intermediate connector 4.After upper and lower cover plate precompressed, place heating furnace to heat up, carry out pressure then in the temperature-rise period and regulate, after temperature is raised to 850 ℃ insulation promptly salable, sealant (being single sealed composite assembly 5) thickness is less than 1mm.According to this Seal Design structure, adopt this kind encapsulant, can test obtaining long-time stable cell voltage and excellent thermal circulation performance, the result is shown in Figure 14,15.
Claims (9)
1, a kind of battery pile encapsulant is characterized in that adopting the glass ceramics non-crystalline material, and this glass ceramics non-crystalline material includes the component of following parts by weight proportioning:
Al
2O
3 10～17；
SiO
2 35～55；
CaO 28～38。
2, battery sealing material according to claim 1 is characterized in that this glass ceramics non-crystalline material comprises that trace element is Zn or F.
3, battery sealing material according to claim 2 is characterized in that this glass ceramics non-crystalline material includes the component of following parts by weight proportioning:
Al
2O
3 14；
SiO
2 47.9；
CaO 34.8；
Trace element 3.3.
4, a kind of fuel battery stack sealing structure, comprise monocell and be located at the intermediate connector of monocell both sides respectively, it is characterized in that being provided with between described monocell both sides and the intermediate connector sealed composite assembly, the sealing composite component is made up of stainless steel space bar and the glass ceramics non-crystalline material that is pasted on stainless steel space bar both sides, and the glass ceramics non-crystalline material includes the component of following parts by weight proportioning:
Al
2O
3 10～17；
SiO
2 35～55；
CaO 28～38。
5, fuel battery stack sealing structure according to claim 4 is characterized in that this glass ceramics non-crystalline material comprises that trace element is Zn or F.
6, a kind of manufacture method of fuel battery stack sealing structure comprises
A, adopt laser cutting machine respectively with the glass ceramics non-crystalline material, monocell, stainless steel intermediate connector and space bar are cut into the battery pile component;
B, the glass ceramics non-crystalline material is fixed in stainless steel space bar both sides forms the sealed composite assembly; This glass ceramics non-crystalline material includes the component of following parts by weight proportioning:
Al
2O
3 10～17；
SiO
2 35～55；
CaO 28～38；
C, again the sealed composite assembly is pasted on monocell and the intermediate connector;
D, after upper and lower cover plate precompressed, place heating furnace to heat up, carry out pressure then in the temperature-rise period and regulate, after temperature is raised to 840～860 ℃ insulation promptly salable, sealant thickness is less than 1mm.
7, method according to claim 6, it is as follows to it is characterized in that among the step b that the glass ceramics non-crystalline material is fixed in stainless steel space bar both sides actual conditions: place heating furnace, be incubated 1.5～2.5 hours according to behind temperature programming to 840～860 of 4～6 ℃/min ℃ under the pressure of 4～6kg, and carrying out 2～4 thermal cycles.
8, method according to claim 6, it is characterized in that carrying out in the described temperature-rise period of steps d pressure regulates and is specially: be incubated 1.5～2.5 hours according to behind temperature programming to 840～860 of 4～6 ℃/min ℃ under the pressure of 4～6kg, and carrying out 2～4 thermal cycles.
9, method according to claim 6 is characterized in that this glass ceramics non-crystalline material comprises that trace element is Zn or F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810061478XA CN101577318B (en) | 2008-05-05 | 2008-05-05 | Making method of sealing material for cell stack sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810061478XA CN101577318B (en) | 2008-05-05 | 2008-05-05 | Making method of sealing material for cell stack sealing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101577318A true CN101577318A (en) | 2009-11-11 |
| CN101577318B CN101577318B (en) | 2012-05-30 |
Family
ID=41272165
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|---|---|---|---|
| CN200810061478XA Active CN101577318B (en) | 2008-05-05 | 2008-05-05 | Making method of sealing material for cell stack sealing structure |
Country Status (1)
| Country | Link |
|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102906046A (en) * | 2010-04-01 | 2013-01-30 | 法国原子能及替代能源委员会 | Glass-ceramic compositions for joints of appliances operating at high temperatures, and assembly method using said compositions |
| CN110854408A (en) * | 2019-11-20 | 2020-02-28 | 杨云 | Method and device for reducing leakage rate of fuel cell |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300275C (en) * | 2004-09-06 | 2007-02-14 | 中国科学技术大学 | Seal agent of medium-temperature solid oxide fuel cell |
| US7399720B1 (en) * | 2004-10-15 | 2008-07-15 | Brow Richard K | Glass and glass-ceramic sealant compositions |
-
2008
- 2008-05-05 CN CN200810061478XA patent/CN101577318B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102906046A (en) * | 2010-04-01 | 2013-01-30 | 法国原子能及替代能源委员会 | Glass-ceramic compositions for joints of appliances operating at high temperatures, and assembly method using said compositions |
| CN102906046B (en) * | 2010-04-01 | 2018-02-02 | 法国原子能及替代能源委员会 | The glass ceramics glass composition and the assemble method using the composition padded for the equipment operated at high temperature |
| CN110854408A (en) * | 2019-11-20 | 2020-02-28 | 杨云 | Method and device for reducing leakage rate of fuel cell |
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| Publication number | Publication date |
|---|---|
| CN101577318B (en) | 2012-05-30 |
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Effective date of registration: 20240324 Address after: No. 11-1-1-1, Building 1, East Zone, Ningbo New Material Innovation Center, High tech Zone, Ningbo City, Zhejiang Province, 315048 Patentee after: Zhejiang Industrial Research Institute Development Co.,Ltd. Country or region after: China Address before: 315201, No. 519, Zhuang Avenue, Zhenhai District, Zhejiang, Ningbo Patentee before: NINGBO INSTITUTE OF MATERIALS TECHNOLOGY & ENGINEERING, CHINESE ACADEMY OF SCIENCES Country or region before: China |