CN116525873A - Anti-carbon self-sealing electric symbiotic solid oxide fuel cell structure - Google Patents
Anti-carbon self-sealing electric symbiotic solid oxide fuel cell structure Download PDFInfo
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- CN116525873A CN116525873A CN202310392365.2A CN202310392365A CN116525873A CN 116525873 A CN116525873 A CN 116525873A CN 202310392365 A CN202310392365 A CN 202310392365A CN 116525873 A CN116525873 A CN 116525873A
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- 239000000446 fuel Substances 0.000 title claims abstract description 86
- 238000007789 sealing Methods 0.000 title claims abstract description 33
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 23
- 239000007787 solid Substances 0.000 title claims abstract description 20
- 238000002407 reforming Methods 0.000 claims abstract description 109
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 31
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 31
- 230000003647 oxidation Effects 0.000 claims abstract description 18
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 18
- 239000003792 electrolyte Substances 0.000 claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000008021 deposition Effects 0.000 claims abstract description 10
- 230000001590 oxidative effect Effects 0.000 claims description 34
- 239000004215 Carbon black (E152) Substances 0.000 claims description 16
- 229930195733 hydrocarbon Natural products 0.000 claims description 16
- 150000002430 hydrocarbons Chemical class 0.000 claims description 16
- 239000011148 porous material Substances 0.000 claims description 7
- 238000006057 reforming reaction Methods 0.000 claims description 7
- 239000003054 catalyst Substances 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 5
- 238000006555 catalytic reaction Methods 0.000 claims description 4
- 238000009792 diffusion process Methods 0.000 claims description 2
- 239000004071 soot Substances 0.000 claims 2
- 230000008646 thermal stress Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 86
- 238000004891 communication Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/0276—Sealing means characterised by their form
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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
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
-
- 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
- H01M8/0297—Arrangements for joining electrodes, reservoir layers, heat exchange units or bipolar separators to each other
-
- 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
- H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
- H01M8/0606—Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants
- H01M8/0612—Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants from carbon-containing material
- H01M8/0618—Reforming processes, e.g. autothermal, partial oxidation or steam reforming
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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)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention provides an anti-carbon self-sealing electric symbiotic solid oxide fuel cell structure, and relates to the technical field of cells. The cell structure includes a connector reforming plate, an anode, an electrolyte, and a cathode; the connector reforming plate comprises a connector body, wherein the upper surface and the lower surface of the connector body are respectively provided with a battery supporting porous region and an oxidation gas flow channel, the lower surface of the battery supporting porous region is provided with a reforming synthetic gas flow channel, a reforming porous region is arranged between the reforming synthetic gas flow channel and the oxidation gas flow channel, and the reforming porous region is separated from the upper flow channel and the lower flow channel by a leakage-free wall surface; the anode, electrolyte and cathode are stacked in sequence on the upper surface of the porous region of the cell support. The cell structure realizes self-sealing of the reformed fuel and the reformed synthesis gas, and reduces the sealing difficulty of the flat SOFC; the indirect reforming of the fuel in the reforming porous region can avoid the problems of structural damage of the battery and carbon deposition of the anode caused by overlarge local thermal stress of internal reforming, and greatly improves the performance and service life of the battery.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to an anti-carbon self-sealing electric symbiotic solid oxide fuel cell structure.
Background
A solid oxide fuel cell (Solid Oxide Fuel Cells, SOFC) is a power generation device that directly converts chemical energy of fuel into electric energy, and is mainly composed of an anode, an electrolyte, and a cathode. The most common SOFC pile configuration mainly comprises a flat plate type pile and a circular pipe type pile, wherein the flat plate type pile has the advantages of simple structure, convenient modularization assembly, and more importantly, the current conduction path is shorter and has higher power density, but the flat plate type SOFC pile has the defects of large sealing area, difficult high-temperature sealing, mismatch of thermal expansion of materials among components and the like.
SOFCs use a wider range of fuels than other types of fuel cells, including hydrocarbon fuels such as methane, synthesis gas, ethanol, and the like, in addition to hydrogen. When hydrocarbon is used as fuel for SOFC, the fuel is usually reformed to obtain CO and H 2 The synthesis gas of the mixture enters the porous electrode to generate electrochemical reaction. From the reforming site, fuel reforming can be classified into external reforming and internal reforming. External reforming is to first produce synthesis gas from hydrocarbon fuel and then to feed the SOFC stack. This reforming increases the volume and complexity of the system and increases the cost. Inner partReforming is to add proper amount of steam into hydrocarbon fuel and utilize the high temperature working environment of SOFC to realize the reforming inside the fuel. While the complexity and cost of the external reforming apparatus can be reduced, the internal reforming of the fuel that occurs inside the cell is a very fast, strong endothermic chemical reaction that requires the absorption of a large amount of heat, resulting in a large temperature gradient inside the cell, and the resulting thermal stresses can easily cause structural failure of the cell and result in reduced performance. In addition, hydrocarbon fuel is easily cracked in the high-temperature anode, and carbon deposit formed on the surface of the anode active site is covered, so that the performance of the battery is greatly reduced. In addition, the stack is started by directly heating the fuel, preheating and heating the oxidizing gas, or the flow rate of the oxidizing gas is increased to reduce the excessively high operating temperature of the stack. The direct contact of the preheated or cooled gas with the surface of the cathode or anode may cause the phenomenon of structure damage such as separation of the heterogeneous interface inside the battery.
Therefore, sealing of the flat plate type SOFC cell structure and reforming carbon deposition in hydrocarbon fuel are a difficult problem in the field, and if the problem can be solved smoothly, the development of the SOFC technology and the engineering application and popularization can be greatly promoted.
In view of this, the present invention has been made.
Disclosure of Invention
The invention aims to provide an anti-carbon self-sealing electric symbiotic solid oxide fuel cell structure which can realize self sealing of reforming fuel and reforming synthesis gas and reduce the sealing difficulty of a flat SOFC; the reforming fuel indirect reforming of the reforming porous region can avoid the problems of cell structural damage and anode carbon deposition caused by overlarge local thermal stress of internal reforming, and greatly improves the cell performance and service life.
The application can be realized as follows:
the application provides an anti-carbon self-sealing electric symbiotic solid oxide fuel cell structure, which comprises a connector reforming plate, an anode, an electrolyte and a cathode;
the reforming plate comprises a connecting body, wherein the upper surface and the lower surface of the connecting body are respectively provided with a battery supporting porous region and an oxidation gas flow channel, the lower surface of the battery supporting porous region is provided with a reforming synthetic gas flow channel, a reforming porous region for the reforming fuel to generate catalytic reaction is arranged between the reforming synthetic gas flow channel and the oxidation gas flow channel, and the reforming porous region is separated from the reforming synthetic gas flow channel and the oxidation gas flow channel by a leakage-free wall surface so as to realize self-sealing of the reforming fuel;
the anode, electrolyte and cathode are stacked in sequence on the upper surface of the porous region of the cell support.
In an alternative embodiment, the connector body is provided with at least one pair of through holes through which at least one of hydrocarbon fuel, reformed synthesis gas, and oxidizing gas is circulated.
In an alternative embodiment, the cell support porous region has an area smaller than the area of the upper surface of the connector body, and the cell support porous region communicates with the reformed synthesis gas flow passage to allow diffusion of synthesis gas through the pores of the cell support porous region to the anode located at the upper surface of the cell support porous region.
In an alternative embodiment, the reforming porous region is a region having a polyhedral lattice unit structure.
In an alternative embodiment, the porous region includes at least two porous subregions, adjacent two porous subregions are separated by a rib, and the plurality of porous subregions are arranged in sequence perpendicular to the flow direction of the reformed fuel.
In an alternative embodiment, the porosity of each porous subregion decreases gradually along the flow direction of the reformed fuel.
In an alternative embodiment, the porosity decreases in a gradient.
In an alternative embodiment, the maximum porosity is no more than 90% and the minimum porosity is no less than 50%.
In an alternative embodiment, all surfaces in contact with the reformed fuel are provided with a catalyst for the reforming reaction of the hydrocarbon fuel.
In an alternative embodiment, the reforming porous zone has a thickness of 0.5-2.0mm.
In an alternative embodiment, the reforming porous section is at a minimum distance of 0.5-1.0mm from the top of the oxidation gas flow path or from the bottom of the reforming synthesis gas flow path.
In an alternative embodiment, the anode and electrolyte cover the cell support porous region and the entire upper surface of the connector reformer plate, respectively, with the projection of the cathode coinciding with the area occupied by the reformate synthesis gas flow path.
The beneficial effects of this application include:
the reforming plate comprises a connecting body, wherein the upper surface and the lower surface of the connecting body are respectively provided with a battery supporting porous region and an oxidation gas flow channel, the lower surface of the battery supporting porous region is provided with a reforming synthetic gas flow channel, a reforming porous region for a reforming fuel to generate a catalytic reaction is arranged between the reforming synthetic gas flow channel and the oxidation gas flow channel, and the reforming porous region is separated from the reforming synthetic gas flow channel and the oxidation gas flow channel by a leakage-free wall surface so as to realize the sealing of the reforming fuel; the anode, electrolyte and cathode are stacked in sequence on the upper surface of the porous region of the cell support.
By the arrangement, the self-sealing of the reforming fuel and the reforming synthesis gas is realized, and the sealing difficulty of the flat SOFC is reduced; and in addition, the problem of damage to the cell structure and carbon deposition of the anode caused by overlarge local thermal stress of internal reforming can be avoided by indirect reforming of the reformed fuel in the reforming porous region, so that the cell performance and service life are greatly improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural diagram of an anti-carbon self-sealing electrical symbiotic solid oxide fuel cell structure provided herein;
FIG. 2 is a cross-sectional view taken along the direction 1-1 of FIG. 1;
FIG. 3 is an enlarged view of FIG. 2 at A;
FIG. 4 is an enlarged view at B in FIG. 3;
fig. 5 is a schematic structural view of the reforming plate of the connector of fig. 1.
Icon: 10-connector reforming plate; 11-a connector body; 111-a first side; 112-a second side; 113-a third side; 114-fourth side; 115-reforming a synthesis gas inlet; 116-reformed synthesis gas outlet; 117-oxidizing gas inlet; 118-oxidizing gas outlet; 119-reforming fuel inlet; 120-reformed fuel outlet; 12-cell support porous region; 13-reforming a synthesis gas flow path; 14-reforming a porous zone; 15-an oxidation gas flow path; 20-anode; 30-an electrolyte; 40-cathode.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Examples
Referring to fig. 1 to 5 together, the present embodiment provides an anti-carbon self-sealing electric co-occurrence solid oxide fuel cell structure, which includes a connector reforming plate 10, an anode 20, an electrolyte 30 and a cathode 40.
The connector reforming plate 10 comprises a connector body 11, wherein a battery supporting porous region 12 and an oxidizing gas flow channel 15 are respectively arranged on the upper surface and the lower surface of the connector body 11, a reforming synthetic gas flow channel 13 is arranged on the lower surface of the battery supporting porous region 12, a reforming porous region 14 for the reforming fuel to undergo a catalytic reaction is arranged between the reforming synthetic gas flow channel 13 and the oxidizing gas flow channel 15, and the reforming porous region 14 is separated from the reforming synthetic gas flow channel 13 and the oxidizing gas flow channel 15 by a leakage-free wall surface to realize the sealing of the reforming fuel.
The anode 20, the electrolyte 30, and the cathode 40 are sequentially stacked on the upper surface of the cell support porous region 12.
The area of the above-mentioned cell support porous region 12 is smaller than the area of the upper surface of the connector body 11 (to avoid gas leakage), and the cell support porous region 12 communicates with the reformed synthesis gas flow passage 13 to allow the synthesis gas to diffuse through the pores of the cell support porous region 12 to the anode 20 located on the upper surface of the cell support porous region 12.
The anode 20, the electrolyte 30, and the cathode 40 are sequentially stacked on the upper surface of the cell support porous region 12.
Wherein the anode 20 covers the upper surface of the cell support porous region 12, and the electrolyte 30 covers the entire upper surface of the anode 20 and the entire connection body reforming plate 10. The projection of the cathode 40 coincides with the area occupied by the reformed synthesis gas flow passage 13.
In the present application, the reforming porous region 14 is a region having a polyhedral lattice unit structure, and the polyhedron may be, for example, a hexahedron or an octahedron, by way of example.
In some embodiments, the number of reforming porous zones 14 may be only 1. In other embodiments, reforming porous zone 14 comprises at least two porous subregions. For example, the porous region may be formed collectively from 2, 3, 4, 5 or more porous subregions.
When the reforming porous section 14 includes at least two porous subregions, the adjacent two porous subregions are separated by a rib, and the plurality of porous subregions are arranged in sequence in a direction perpendicular to the flow direction of the reformed fuel.
In this application, the porosity of each porous subregion is gradually, preferably in a gradient, decreasing in the direction of flow of the reformate fuel.
It should be noted that, the internal reforming of the fuel occurring inside the battery is a strong endothermic chemical reaction with a very fast rate, and a large amount of heat needs to be absorbed. In addition, the mode can not only avoid that carbon deposit formed by hydrocarbon fuel covers the surface of the active site of the anode 20 to greatly reduce the performance of the battery, but also avoid that a heterogeneous interface inside the battery generates a separation and other damage structures.
For reference, among the above porosities, the maximum porosity is not more than 90% and the minimum porosity is not less than 50%. The gradient involved in the porosity gradient setup may be 1%, 2%, 5%, 10%, 15%, 20%, 25% or 30%, etc.
It should be noted that, if the minimum porosity of the reforming porous region 14 is less than 50%, a larger hydrocarbon fuel flow pressure drop is easily generated in the porous region, increasing the energy loss of the fuel pump; the maximum porosity higher than 90% reduces the area of the area where the reforming reaction takes place, resulting in insufficient reforming reaction of hydrocarbon fuel.
The pore diameter of each pore in the reforming porous section 14 may be 50 to 1000. Mu.m, such as 50 μm, 100 μm, 200 μm, 300 μm, 400 μm, 500 μm, 600 μm, 700 μm, 800 μm, 900 μm or 1000 μm, or may be any other value in the range of 50 to 1000. Mu.m.
If the pore diameter of each pore in the reforming porous section 14 is smaller than 50 μm, the flow resistance of the fuel gas is increased, which is disadvantageous in reducing the pressure loss; if it is more than 1000. Mu.m, not only the area of the reforming reaction region but also the thickness of the connecting body may be increased.
For reference, the total thickness of the reforming porous section 14 may be 0.5 to 2.0mm, such as 0.5mm, 0.8mm, 1.0mm, 1.2mm, 1.5mm, 1.8mm, or 2.0mm, etc., or any other value in the range of 0.5 to 2.0mm.
If the total thickness of the reforming porous region 14 is less than 0.5mm, it is disadvantageous to provide sufficient reforming reaction sites to make the reforming reaction incomplete; greater than 2.0mm is disadvantageous in reducing the thickness of individual cells, resulting in an increase in cell volume and weight, and a decrease in cell energy density.
For ease of understanding, the reformed synthesis gas flow path 13 may be a concave groove from top to bottom, and similarly, the oxidation gas flow path 15 may be a concave groove upwardly concave from the lower surface of the connector body 11.
The bottom of the reforming porous region 14 may be set to be 0.5 to 1.0mm, such as 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, or 1.0mm, from the top of the oxidation flow path 15, or the minimum distance of the top of the reforming porous region 14 from the bottom of the reforming synthesis flow path 13, and the like, and may be any other value in the range of 0.5 to 1.0mm.
If the bottom of the reforming porous region 14 is away from the top of the oxidation gas flow path 15, or the minimum distance between the top of the reforming porous region 14 and the bottom of the reforming synthesis gas flow path 13 is less than 0.5mm, gas leakage and gas leakage are easily caused by high-temperature corrosion of the wall surface, so that the galvanic pile fails in advance; if the bottom of the reforming porous region 14 is spaced from the top of the oxidation gas flow path 15, or if the minimum distance between the top of the reforming porous region 14 and the bottom of the reforming synthesis gas flow path 13 is greater than 1.0mm, it is easy to cause a large volume weight of the stack and a low energy density.
Preferably, all surfaces in contact with the reformed fuel are provided with a catalyst for reforming the hydrocarbon fuel. In addition, a catalyst for reforming hydrocarbon fuel may be provided on a part of the surface in contact with the reformed fuel.
For reference, the catalyst may be generated in situ by the design of the linker material, or may be supported to the surface of the porous region 14 by impregnation or the like.
The catalyst may be a material having high catalytic activity, and may include, by way of example and not limitation, al 2 O 3 、NiO、CeO 2 And La (La) 2 O 3 At least one of them.
In the present application, the connector body 11 is provided with at least one pair of through holes through which at least one of hydrocarbon fuel, reformed synthesis gas, and oxidizing gas flows.
In some specific embodiments, the arrangement of the connector body 11 and the through holes can be referred to as follows:
taking the overall rectangular (e.g., rectangular) shape as an example, the connector body 11 has a first side 111, a second side 112, a third side 113 and a fourth side 114 that are sequentially connected end to end, where the first side 111 and the third side 113 are disposed opposite to each other, and the second side 112 and the fourth side 114 are disposed opposite to each other.
The through-holes include a reformed syngas inlet 115, a reformed syngas outlet 116, an oxidizing gas inlet 117, an oxidizing gas outlet 118, a reformed fuel inlet 119, and a reformed fuel outlet 120.
Wherein the reformed synthesis gas inlet 115 is disposed at a position of the connector body 11 near the first side 111 and penetrates through the upper surface and the lower surface of the connector body 11, and the reformed synthesis gas outlet 116 is disposed at a position of the connector body 11 near the third side 113 and penetrates through the upper surface and the lower surface of the connector body 11; the oxidizing gas inlet 117 is disposed at a position of the connector body 11 near the third side 113 and penetrates through the upper and lower surfaces of the connector body 11, and the oxidizing gas outlet 118 is disposed at a position of the connector body 11 near the first side 111 and penetrates through the upper and lower surfaces of the connector body 11; the reforming fuel inlet 119 is provided at a position of the connector body 11 near the second side 112 and penetrates the upper and lower surfaces of the connector body 11, and the reforming fuel outlet 120 is provided at a position of the connector body 11 near the fourth side 114 and penetrates the upper and lower surfaces of the connector body 11.
The reformed synthesis gas flow path 13 has both ends respectively communicating with the reformed synthesis gas inlet 115 and the reformed synthesis gas outlet 116, the oxidizing gas flow path 15 has both ends respectively communicating with the oxidizing gas inlet 117 and the oxidizing gas outlet 118, and the reforming porous region 14 has both ends respectively communicating with the reformed fuel inlet 119 and the reformed fuel outlet 120.
For example, the reformed syngas flow path 13 may be formed by a plurality of reformed syngas sub-flow paths disposed at intervals, and the extending direction of each reformed syngas sub-flow path may be the flow direction of the reformed gas, specifically, may extend from the first side 111 to the third side 113. Similarly, the oxidizing gas flow channel 15 may be formed by a plurality of oxidizing gas sub-flow channels arranged at intervals, and the extending direction of each oxidizing gas sub-flow channel is the flowing direction of the oxidizing gas, and specifically may extend from the third side surface 113 to the first side surface 111.
In some embodiments, the number of reformed syngas inlets 115 may be 1, the number of reformed syngas outlets 116 may be 1, and all of the reformed syngas sub-channels may have one end in communication with the reformed syngas inlet 115 and the other end in communication with the reformed syngas outlet 116. In other embodiments, the number of reformed syngas inlets 115 may be 2 and the number of reformed syngas outlets 116 may be 1, in which case one end of a portion of the reformed syngas sub-flow passage is in communication with 1 of the reformed syngas inlets 115 and one end of the remaining reformed syngas sub-flow passage is in communication with the remaining 1 reformed syngas inlet 115 and the other end of all of the reformed syngas sub-flow passages is in communication with the reformed syngas outlet 116. In other embodiments, the number of reformed syngas inlets 115 and reformed syngas outlets 116 may be adjusted as desired, and the placement on the connector body 11 may be correspondingly set as desired.
Similarly, in some embodiments, the number of the oxidizing gas inlets 117 may be 1, the number of the oxidizing gas outlets 118 may be 1, and one end of all the oxidizing gas sub-channels may be in communication with the oxidizing gas inlets 117, and the other end may be in communication with the oxidizing gas outlets 118. In other embodiments, the number of the oxidizing gas inlets 117 may be 2, and the number of the oxidizing gas outlets 118 may be 1, in which case, one end of each of the partial oxidizing gas sub-channels is in communication with 1 of the oxidizing gas inlets 117, one end of the remaining oxidizing gas sub-channels is in communication with the remaining 1 of the oxidizing gas inlets 117, and the other ends of all of the oxidizing gas sub-channels are in communication with the oxidizing gas outlets 118. In other embodiments, the number of the oxidizing gas inlets 117 and the oxidizing gas outlets 118 may be adjusted as needed, and the arrangement positions on the connector body 11 may be set accordingly as needed.
Similarly, the number of the reformed fuel inlets 119 and the reformed fuel outlets 120 may also be set in the above-described manner, and preferably, the number of the reformed fuel inlets 119 and the reformed fuel outlets 120 is equal, and may be set to 1, 2, or more; more preferably, the number of reformed fuel inlets 119 and reformed fuel outlets 120 is equal to the number of porous sub-regions and is arranged in one-to-one correspondence.
In other embodiments, the shape of the connector body 11, the installation positions and the installation number of the through holes, and the like may be adjusted according to actual needs. In addition, the relevant content of other solid fuel cells not described in detail in the present application may refer to the corresponding prior art, and will not be described in detail herein.
In summary, the cell structure provided by the application realizes self-sealing of the reforming fuel and the reforming synthesis gas, and reduces the sealing difficulty of the flat SOFC; the indirect reforming of the reformed fuel in the reforming porous region 14 can avoid the problems of damage to the cell structure and carbon deposition of the anode 20 caused by excessive local thermal stress of internal reforming, thereby greatly improving the cell performance and service life.
The present invention is not limited to the above embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (10)
1. An anti-carbon self-sealing electric symbiotic solid oxide fuel cell structure is characterized by comprising a connector reforming plate, an anode, an electrolyte and a cathode;
the connector reforming plate comprises a connector body, wherein the upper surface and the lower surface of the connector body are respectively provided with a battery supporting porous region and an oxidation gas flow channel, the lower surface of the battery supporting porous region is provided with a reforming synthetic gas flow channel, a reforming porous region for a reforming fuel to generate a catalytic reaction is arranged between the reforming synthetic gas flow channel and the oxidation gas flow channel, and the reforming porous region is separated from the reforming synthetic gas flow channel and the oxidation gas flow channel by a leakage-free wall surface so as to realize self sealing of the reforming fuel;
the anode, the electrolyte, and the cathode are sequentially stacked on the upper surface of the cell support porous region.
2. The carbon deposition resistant self-sealing electrical symbiotic solid oxide fuel cell structure of claim 1 wherein the connector body is provided with at least one pair of through holes through which at least one of hydrocarbon fuel, reformed synthesis gas and oxidizing gas is circulated.
3. The carbon deposition resistant self-sealing electrical symbiotic solid oxide fuel cell structure of claim 1 wherein the cell support porous zone has an area that is less than the area of the upper surface of the connector body and the cell support porous zone communicates with the reformed syngas flow passage to allow diffusion of syngas through the pores of the cell support porous zone to the anode located at the upper surface of the cell support porous zone.
4. The anti-soot self-sealing electrical co-occurrence solid oxide fuel cell structure of claim 1, wherein said reforming porous region is a region having a polyhedral lattice unit structure.
5. The carbon deposition resistant self-sealing electrical symbiotic solid oxide fuel cell structure of claim 4 wherein the porous zone comprises at least two porous subregions separated by ribs between two adjacent porous subregions, and a plurality of porous subregions are arranged in sequence along a direction perpendicular to the flow direction of the reformed fuel.
6. The anti-soot self-sealing electrical co-occurrence solid oxide fuel cell structure of claim 5, wherein the porosity of each of said porous sub-regions decreases progressively in the direction of reformed fuel flow;
preferably, the porosity decreases in a gradient;
preferably, the maximum porosity is not more than 90% and the minimum porosity is not less than 50% of the porosities.
7. The carbon deposit resistant self-sealing electrical symbiotic solid oxide fuel cell structure of claim 5 characterized by the fact that all surfaces in contact with the reformed fuel are provided with catalysts for reforming reactions of hydrocarbon fuel.
8. The carbon deposition resistant self-sealing electrical symbiotic solid oxide fuel cell structure of claim 1 wherein the thickness of the reforming porous zone is 0.5-2.0mm.
9. The carbon deposition resistant self-sealing electrical symbiotic solid oxide fuel cell structure of claim 8 wherein the reforming porous zone is at a minimum distance of 0.5-1.0mm from the top of the oxidation gas flow path or from the bottom of the reforming synthesis gas flow path.
10. The carbon deposit resistant self-sealing electrical symbiotic solid oxide fuel cell structure of any of claims 1-9 wherein the anode and electrolyte cover the upper surface of the cell support porous region and the entire connector reformer plate, respectively, and the projection of the cathode coincides with the occupied area of the reformate synthesis gas flow path.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310392365.2A CN116525873A (en) | 2023-04-12 | 2023-04-12 | Anti-carbon self-sealing electric symbiotic solid oxide fuel cell structure |
| PCT/CN2023/128976 WO2024061382A1 (en) | 2023-04-12 | 2023-11-01 | Anti-carbon-deposition self-sealing electricity-gas symbiotic solid oxide fuel cell structure |
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|---|---|---|---|
| CN202310392365.2A CN116525873A (en) | 2023-04-12 | 2023-04-12 | Anti-carbon self-sealing electric symbiotic solid oxide fuel cell structure |
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| CN116525873A true CN116525873A (en) | 2023-08-01 |
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| CN202310392365.2A Pending CN116525873A (en) | 2023-04-12 | 2023-04-12 | Anti-carbon self-sealing electric symbiotic solid oxide fuel cell structure |
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| WO (1) | WO2024061382A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024061382A1 (en) * | 2023-04-12 | 2024-03-28 | 广东省科学院新材料研究所 | Anti-carbon-deposition self-sealing electricity-gas symbiotic solid oxide fuel cell structure |
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| KR101162008B1 (en) * | 2010-12-28 | 2012-07-03 | 주식회사 포스코 | Fuel cell with distribute plate |
| US10978722B2 (en) * | 2016-10-24 | 2021-04-13 | Precision Combustion, Inc. | Regenerative solid oxide stack |
| US10340534B2 (en) * | 2016-11-02 | 2019-07-02 | Lg Fuel Cell Systems Inc. | Revised fuel cell cycle for in block reforming fuel cells |
| CN114944498A (en) * | 2022-05-26 | 2022-08-26 | 西安交通大学 | Integrated connector supported electric symbiotic solid oxide fuel cell/cell stack reactor |
| CN114976102B (en) * | 2022-05-26 | 2024-06-11 | 西安交通大学 | Preparation method of integrated connector supported electric symbiotic solid oxide fuel cell/cell stack reactor |
| CN116525873A (en) * | 2023-04-12 | 2023-08-01 | 广东省科学院新材料研究所 | Anti-carbon self-sealing electric symbiotic solid oxide fuel cell structure |
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| WO2024061382A1 (en) * | 2023-04-12 | 2024-03-28 | 广东省科学院新材料研究所 | Anti-carbon-deposition self-sealing electricity-gas symbiotic solid oxide fuel cell structure |
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