Method for preparing flat-plate type metal-support solid oxide fuel cell

A solid oxide, metal-supported technology, used in solid electrolyte fuel cells, fuel cell components, fuel cells, etc. Simplified structure and preparation process, good high temperature oxidation resistance, and the effect of avoiding electrolyte cracking

Inactive Publication Date: 2013-01-16
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Anode problem: The traditional metal-supported SOFC adopts the structure of metal support/anode/electrolyte/cathode. During the high-temperature co-sintering preparation or long-term operation of the battery, the anode metal particles Ni will coarsen, and will also be combined with the alloy Interdiffusion occurs between elements Fe and Cr
This not only reduces the catalytic performance of the anode, but also leads to changes in the thermal expansion coefficient of the support, a decrease in long-term stability, a decrease in electrical conductivity, and a decrease in oxidation resistance.
Adding a diffusion barrier layer between the anode and the metal support can prevent the interdiffusion between the alloying elements and the anode metal particles, but it will lead to the complexity of the preparation process and the degradation of battery performance. In addition, th

Method used

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  • Method for preparing flat-plate type metal-support solid oxide fuel cell
  • Method for preparing flat-plate type metal-support solid oxide fuel cell
  • Method for preparing flat-plate type metal-support solid oxide fuel cell

Examples

Experimental program
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Effect test

Embodiment 1

[0054] In the 50g 430 stainless steel powder, add solvent absolute ethanol 7g, butanone 5g, dispersant triethanolamine 4g, BYK1g, plasticizer dibutyl phthalate 1g, binder polyvinyl butyral 6g, Pore-forming agent ammonium oxalate 20g; add solvent xylene, butyl acetate 5g each, dispersant DM-55 1g, plasticizer B-50 1g, binder B-724g to 30g electrolyte YSZ powder; Add 4g of solvent xylene and butyl acetate, 1g of dispersant DM-55, 0.5g of plasticizer B-500.5g, 1g of binder B-72, and 10g of pore-forming agent ammonium oxalate to the cathode precursor layer YSZ powder;

[0055] Ball mill the above three kinds of slurries respectively, and sieve the mixed slurries through sieves and vacuum treatment to remove the air in the slurries;

[0056] Carrying out tape casting and drying the above three kinds of slurries respectively to obtain green bodies of metal support layer, electrolyte layer and cathode precursor layer, and cutting each green body into green bodies meeting the size req...

Embodiment 2

[0063] Add 12g of solvent absolute ethanol, 6g of methyl ethyl ketone, 4g of dispersant triethanolamine, 2g of plasticizer dibutyl phthalate and 2g of polyethylene glycol to 50g of 430 stainless steel powder, and binder polyvinyl alcohol Butyraldehyde 3g, pore-forming agent ammonium carbonate 20g; add solvent xylene, butyl acetate 5g each, dispersant DM-55 1g, plasticizer B-50 2g, binder B- 72 4g; Add 4g of solvent xylene and butyl acetate, 1.5g of dispersant DM-55, 1g of plasticizer B-50, and 2g of binder B-72 to 15g of cathode precursor layer YSZ powder, and make holes Agent ammonium carbonate 15g;

[0064] Ball mill the above three kinds of slurries respectively, and sieve the mixed slurries through sieves and vacuum treatment to remove the air in the slurries;

[0065] Carrying out tape casting and drying the above three kinds of slurries respectively to obtain green bodies of metal support layer, electrolyte layer and cathode precursor layer, and cutting each green body ...

Embodiment 3

[0072] The preparation process of the SOFC of three-layer structure is consistent with embodiment 2; The nitrate water-ethanol solution of active cathode material LSCF-GDC is impregnated in cathode precursor layer, and wherein the addition of ethanol is 50% of solvent total volume used; Then in inert The battery cathode is obtained after heat treatment at 850°C in the atmosphere; the active anode material Ni-CeO is impregnated in the metal support layer 2 The nitrate water-ethanol solution, wherein the amount of ethanol added is 40% of the total volume of the solvent used; and then the anode of the battery is obtained after heat treatment in the air at 500 ° C; the flat metal-supported SOFC is obtained.

[0073] After testing, the cathode side is ambient air and the anode side is 97%H 2 +3%H 2 0. The maximum power density of the battery prepared in this example is 350mW / cm at 700°C 2 , still has good electrical properties.

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Abstract

The invention discloses a method for preparing a flat-plate type metal-support solid oxide fuel cell. The method comprises the following steps of: firstly respectively preparing three layers of biscuits such as a porous metal support layer, a compact electrolyte layer and a porous cathode precursor layer, then superimposing from bottom to top in sequence for carrying out hot pressing, then carrying out high-temperature common sintering, using a surface active agent to carry out surface treatment on the porous metal support layer, finally immersing a salt solution of an active cathode material in the porous cathode precursor layer, and performing heat treatment, so as to obtain a cathode of the cell; and immersing a salt solution of an active anode material in the porous metal support layer, performing the heat treatment, so as to obtain an anode of the cell. The method has the advantages that the cost is low, the operability is strong, the batched and continuous production is convenient; and according to the prepared cell, the combination among all the layers is close, the thickness, the porosity and the like of all the function layers can be controlled, the cathode and the anode of the cell are prepared by immersion, the performance of the cell is high, the stability is good, the service life of an electric pile can be guaranteed, the cost of a system is reduced and the application prospect is very good.

Description

technical field [0001] The invention relates to a method for preparing a flat metal-supported solid oxide fuel cell, which belongs to the technical field of solid oxide fuel cells. Background technique [0002] Solid Oxide Fuel Cell (SOFC) is an electrochemical device that directly converts the chemical energy of hydrogen, natural gas and biomass gas fuels into electrical energy. Features, can be widely used in large-scale power plants, distributed power plants, automotive auxiliary power supply, household combined heat and power systems, etc. Although SOFC has many excellent properties, it has not yet been applied on a large scale, and its main constraints are cost and lifetime issues. Compared with the traditional electrolyte support or electrode support structure, the new metal support structure can improve the mechanical strength of the single cell, increase the thermal shock resistance of the battery, reduce the cost of the SOFC system, and help solve the problem of st...

Claims

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Application Information

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IPC IPC(8): H01M8/12H01M8/02H01M4/88H01M4/86H01M8/0273H01M8/1213H01M8/1226H01M8/124
CPCY02E60/521Y02E60/525Y02E60/50Y02P70/50
Inventor 周玉存王绍荣占忠亮钱继勤刘雪娇孟燮袁春韩达
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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