CN205231176U - Solid oxide fuel cell electrode and solid oxide fuel cell - Google Patents
Solid oxide fuel cell electrode and solid oxide fuel cell Download PDFInfo
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- CN205231176U CN205231176U CN201520989018.9U CN201520989018U CN205231176U CN 205231176 U CN205231176 U CN 205231176U CN 201520989018 U CN201520989018 U CN 201520989018U CN 205231176 U CN205231176 U CN 205231176U
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- fuel cell
- solid oxide
- oxide fuel
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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 utility model relates to a solid oxide fuel cell electrode and solid oxide fuel cell, it is including locating the electrode body that electrolyte layer went up, had porous structure, especially: still be formed with a plurality of gas passages on having porous structure's electrode body, this gas passage has an extending direction, and forms relative first end and second end on an extending direction, and at least one opening in first end and the second end is in order to feed through the gas passage with the external world. Can regulate and control optimize through these gas passages gaseous in the inside diffusion of electrode, and then the unequal problem of temperature distribution of effectively alleviating or avoiding solid oxide fuel cell real work in -process ubiquitous reaction position skewness and lead to from this, in addition, the setting of gas passage still is favorable to positive pole department (oxygen ionophore solid oxide fuel cell ) or negative pole department (proton conductor solid oxide fuel cell ) to generate the timely discharge of water.
Description
Technical field
The utility model relates to field of solid oxide fuel, is specifically related to a kind of solid oxide fuel cell electrode.
Background technology
Day by day become the overall background of the key factor of restriction society and economic development at the energy and environmental problem under, Solid Oxide Fuel Cell as a kind of can be directly the energy conversion device of electric energy by chemical energy, high owing to having energy conversion efficiency concurrently, the widely applicable extensive concern waiting outstanding advantages to receive people of fuel.As Japanese TOTO Ltd. each provides one in the utility model patent of 201180046923.5 and 201280016340.2 can improve comprehensive energy efficiency, and the Solid Oxide Fuel Cell preventing excessive temperature from rising and can steady operation 90000 hours Solid Oxide Fuel Cell; LG fuel cell system company of the U.S. is optimized the system of fuel cell in the utility model patent of 201280045198.4 and 201280045187.6.
But Solid Oxide Fuel Cell still exist in its practical process some problems need solve.Solid oxide fuel cell electrode preparation as existing in (1) adopts the technique such as flow casting molding, silk screen printing mostly, and prepared porous electrode inside often exists the closed cell region of some.As shown in Figure 1, electrode body 2 ' is formed on the surface of electrolyte 1 '; But the electrochemical reaction of electrode mainly concentrates on electrode body 2 '/reacting gas two-phase interface, the existence of closed cell region by problem uneven for the minimizing and electrochemical reaction area distribution that cause the actual effective electrochemical reaction activating area of electrode interior, this decline and battery temperature problem pockety bringing electrode performance further.(2) its hole of electrode adopting traditional flow casting molding and silk-screen printing technique to prepare is random, often there is the problems such as the narrow and small and skewness in duct, be unfavorable for the diffusion of reacting gas in whole electrode interior and the timely discharge of product, this also will affect the performance of performance in electrode practical work process further.(3) in traditional electrode preparation method, the thickness of single-layer electrodes is often thicker, is unfavorable for that this is also unfavorable for the exploitation of high-performance electrode according to Solid Oxide Fuel Cell real work demand to the regulation and control of its different spatial electrode component.
Utility model content
The utility model object is the solid oxide fuel cell electrode providing a kind of architecture advances in order to overcome the deficiencies in the prior art.
For achieving the above object, the technical solution adopted in the utility model is: a kind of solid oxide fuel cell electrode, it comprises is located on dielectric substrate, has the electrode body of loose structure, particularly: on the described electrode body with loose structure, be also formed with multiple gas passage, this gas passage has the first bearing of trend, and relative first end and the second end is formed on this first bearing of trend, at least one opening in first end and the second end, to be in communication with the outside gas passage.
Preferably, described multiple gas passage is uniformly distributed on electrode body.
Preferably, described first bearing of trend is the thickness direction of electrode body, described first end away from dielectric substrate, described second end near dielectric substrate, first end opening, the second end opening or close.
According to a concrete and preferred aspect of the present utility model, described gas passage also has second bearing of trend vertical with the first bearing of trend, second bearing of trend forms the 3rd relative end and the 4th end, the 3rd end and the equal opening of the 4th end and be in communication with the outside.
Further preferably, described multiple gas passage side by side and equidistantly arrange, makes electrode body form strip lattice structure.
In a concrete execution mode, described electrode body is square, and the second bearing of trend is parallel with the bearing of trend on a limit of electrode body.
According to another concrete and preferred aspect of the present utility model, the arrangement in column in a row of described multiple gas passage, makes electrode body form latticed lattice structure.
As a kind of preferred implementation of the present utility model, described gas passage is constant or diminish gradually to the cross-sectional area of the second end from first end.
According to the utility model, the width of the cross section of gas passage on the first bearing of trend can between 0.1 ~ 100 micron, preferably between 1 ~ 10 micron.
According to the utility model, the component at the different spatial place of described electrode body can be identical or different, can adjust according to battery applications actual demand.
Preferably, electrode body of the present utility model, by first utilizing 3D printer to print electrode precursor, then carries out sintering and obtains.
According to the utility model, described electrode can be anode, also can be negative electrode, and its one or more electrode materials can commonly used by this area form, and are not particularly limited.
Because technique scheme is used, the utility model compared with prior art has following advantages: solid oxide fuel cell provided by the utility model is except the hole that electrode body has, also there is multiple gas passage, by these gas passages can optimising and adjustment gas in the diffusion of electrode interior, and then the unequal problem of thermo parameters method effectively alleviated or avoid ubiquitous response location skewness in Solid Oxide Fuel Cell practical work process and cause thus; In addition, the setting of gas passage also helps the timely discharge that anode place (oxygen ion conductor solid oxide fuel cell) or negative electrode place (proton conductor Solid Oxide Fuel Cell) generate water.
Accompanying drawing explanation
Fig. 1 is traditional electrode micro-structural schematic diagram;
Fig. 2 is the utility model lattice-shaped porous electrode micro-structural schematic diagram;
Fig. 3 is strip lattice structure La0.5Sr0.5Co0.8Fe0.2O3-δ (LSCF) single phase cathode planar structure schematic diagram;
Fig. 4 is the partial enlarged drawing at A place in Fig. 3;
Fig. 5 is strip lattice structure La0.5Sr0.5Co0.8Fe0.2O3-δ (LSCF) single phase cathode cutaway view;
Fig. 6 is the partial enlarged drawing at B place in Fig. 5;
Fig. 7 is the planar structure schematic diagram of the anode of solid oxide fuel cell of embodiment 3,
Fig. 8 is the partial enlarged drawing at C place in Fig. 7;
Fig. 9 is the cross-sectional schematic of the anode of solid oxide fuel cell of embodiment 3,
Figure 10 is the partial enlarged drawing at D place in Fig. 8;
Wherein, 1 ', electrolyte; 2 ', electrode body; 21 ', gas passage; 1, dielectric substrate; 2, electrode body; 21, gas passage; 3, dielectric substrate; 4, electrode body; 41, gas passage.
Embodiment
Below in conjunction with accompanying drawing, the utility model preferred embodiment is described in detail:
Embodiment 1
The present embodiment provides a kind of solid oxide fuel cell electrode, its microstructure as shown in Figure 2, comprise and be located on dielectric substrate 1, there is the electrode body 2 of loose structure, the electrode body 2 with loose structure is also formed with multiple gas passage 21, this gas passage 21 has the first bearing of trend, and on this first bearing of trend, forms relative first end and the second end, first end opening, second end also opening, makes gas passage be in communication with the outside.This electrode has strip lattice structure, effectively can reduce the non-chemically active region that electrode interior causes due to closed pore; In addition, this lattice structure effectively can promote that gas is in the diffusion of cathode internal, the unequal problem of thermo parameters method effectively alleviated or avoid ubiquitous response location skewness in Solid Oxide Fuel Cell practical work process and cause thus.
In the present embodiment, as shown in Figures 3 to 6, this solid oxide fuel cell electrode is single phase cathode electrode, and above-mentioned multiple gas passages 21 are evenly distributed on electrode body 2, and they side by side and equidistantly arrange make electrode body 2 form strip lattice structure.And the first bearing of trend is the thickness direction of electrode body, first end is away from dielectric substrate, and the second end is near dielectric substrate, and gas passage 21 is constant to the cross-sectional area of the second end from first end, its width can be arranged according to actual needs, is generally 0.1 ~ 100 micron.
Particularly, in this example, solid oxide fuel cell electrode is cathode electrode, and it prints by 3D and sinters the method combined prepares.A concrete preparation process is as follows:
(1) prepare cathode slurry, such as, the terpineol solution of LSCF powder and ethyl cellulose is put into agate jar, and add agate ball milling pearl and carry out ball milling, obtained cathode slurry.
(2) according to the structure of the electrode that will prepare, setting print routine, and program is input in 3D printer, after relevant parameter is set, fine and close Gd0.1Ce0.9O1.95 (GDC) electrolyte sheet through surface cleaning process is fixed on 3D stamp pad as printing matrix, in 3D printer ink cartridge, put into corresponding electrode slurry, carry out 3D printing, obtain electrode precursor, wherein, printing board temperature can be set and be such as 40 DEG C, altogether print 20 layers, every layer thickness 0.8 micron.
(3) electrode precursor is taken out from 3D printer, be placed in Muffle furnace and carry out sintering processes, be first warming up to 600 DEG C and be incubated 30 minutes, be then warming up to 1050 DEG C and be incubated 240 minutes, being finally down to room temperature, obtaining electrode.
Embodiment 2
The present embodiment provides a kind of compound cathode of solid oxide fuel battery electrode, substantially identical with embodiment 1 of its microstructure, unlike: have employed the LSCF-SDC composite material that multiple SDC content is different.To cathode layer surface from electrolyte/negative electrode cross section, the thickness of every 1.5 microns adopts a kind of composite material, and in composite material, SDC content reduces (being specifically followed successively by 70wt.%, 60wt.%, 50wt.%, 40wt.%, 30wt.%, 20wt.%, 10wt.% and 0wt.%) gradually.
Embodiment 3
The present embodiment provides a kind of compound anode of solid-oxide fuel battery electrode, as shown in Figure 7 to 10, it comprises is located on dielectric substrate 3, has the electrode body 4 of loose structure, electrode body 4 is formed the gas passage 41 of multiple arrayed in columns of embarking on journey, makes electrode form latticed lattice structure.Gas passage 41 extends along the thickness direction of electrode body 4, its end away from dielectric substrate 3 (first end) opening, close near the end (the second end) of dielectric substrate 3, gas passage 41 diminishes to the cross-sectional area of the second end gradually from first end.
Above-described embodiment is only for illustrating technical conceive of the present utility model and feature; its object is to person skilled in the art can be understood content of the present utility model and implement according to this; protection range of the present utility model can not be limited with this; all equivalences done according to the utility model Spirit Essence change or modify, and all should be encompassed within protection range of the present utility model.
Claims (11)
1. a solid oxide fuel cell electrode, it comprises is located on dielectric substrate, has the electrode body of loose structure, it is characterized in that: on the described electrode body with loose structure, be also formed with multiple gas passage, described gas passage has the first bearing of trend, and on this first bearing of trend, form relative first end and the second end, at least one opening in described first end and the second end.
2. solid oxide fuel cell electrode according to claim 1, is characterized in that: described multiple gas passage is uniformly distributed on described electrode body.
3. solid oxide fuel cell electrode according to claim 1, it is characterized in that: described first bearing of trend is the thickness direction of electrode body, described first end is away from described dielectric substrate, described second end is near described dielectric substrate, described first end opening, the second described end opening or closed.
4. the solid oxide fuel cell electrode according to claim 1 or 2 or 3, it is characterized in that: described gas passage also has second bearing of trend vertical with described first bearing of trend, described second bearing of trend forms the 3rd relative end and the 4th end, described 3rd end and the equal opening of the 4th end and be in communication with the outside.
5. solid oxide fuel cell electrode according to claim 4, is characterized in that: described multiple gas passage side by side and equidistantly arrange, makes described electrode body form strip lattice structure.
6. solid oxide fuel cell electrode according to claim 4, is characterized in that: described electrode body is square, and described second bearing of trend is parallel with the bearing of trend on a limit of described electrode body.
7. solid oxide fuel cell electrode according to claim 3, is characterized in that: the arrangement in column in a row of described multiple gas passage, makes described electrode body form latticed lattice structure.
8. solid oxide fuel cell electrode according to claim 3, is characterized in that: described gas passage is constant or diminish gradually to the cross-sectional area of the second end from described first end.
9. the solid oxide fuel cell electrode according to claim 1 or 3 or 8, is characterized in that: the width of the cross section of described gas passage on described first bearing of trend is between 0.1 ~ 100 micron.
10. solid oxide fuel cell electrode according to claim 9, is characterized in that: the width of the cross section of described gas passage on described first bearing of trend is between 1 ~ 10 micron.
11. 1 kinds of Solid Oxide Fuel Cell, is characterized in that: comprise the solid oxide fuel cell electrode any one of claim 1 to 10 as described in claim.
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| CN201520989018.9U CN205231176U (en) | 2015-12-03 | 2015-12-03 | Solid oxide fuel cell electrode and solid oxide fuel cell |
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| CN201520989018.9U CN205231176U (en) | 2015-12-03 | 2015-12-03 | Solid oxide fuel cell electrode and solid oxide fuel cell |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017092085A1 (en) * | 2015-12-03 | 2017-06-08 | 苏州攀特电陶科技股份有限公司 | Electrode of solid oxide fuel cell, preparation method therefor and solid oxide fuel cell based on same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017092085A1 (en) * | 2015-12-03 | 2017-06-08 | 苏州攀特电陶科技股份有限公司 | Electrode of solid oxide fuel cell, preparation method therefor and solid oxide fuel cell based on same |
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