Metal-supported solid oxide fuel cell and preparation method thereof
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A solid oxide, fuel cell technology, used in solid electrolyte fuel cells, fuel cells, battery electrodes, etc., can solve problems such as preparation difficulties and interface atom diffusion
Active Publication Date: 2014-06-18
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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Problems solved by technology
[0007] The present invention aims at the problems of difficult preparation and serious interfacial atomic diffusi
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Embodiment 1
[0042]To 50g of 430 stainless steel powder, add solvent absolute ethanol 7g, butanone 7g, dispersant triethanolamine 4g, plasticizer dibutyl phthalate 1g, binder polyvinyl butyral 4g, pore-forming Ammonium oxalate 20g, mixed by ball milling, the mixed slurry is sieved and vacuum-treated to remove the air in the slurry to obtain the porous alloy layer slurry;
[0043] Add 5g of solvent xylene, 5g of butyl acetate, 1g of dispersant triethanolamine, 1g of plasticizer dibutyl phthalate, binder poly Vinyl butyral 3g, mixed by ball milling, sieving the mixed slurry through a sieve and vacuum treatment to remove the air in the slurry to obtain the electrolyte layer slurry;
[0044] The above two kinds of slurries are tape-casted and dried respectively to obtain the porous alloy layer and the electrolyte layer green body, and then each green body is cut into a green body that meets the size requirements;
[0045] The porous alloy layer, the electrolyte layer, and the porous alloy lay...
Embodiment 2
[0050] The preparation process and composite layer structure are the same as in Example 1, except that the electrolyte material is zirconia (ScYSZ) co-stabilized by scandium oxide and yttrium oxide, and the cathode side electrode material is Sm 0.5 Sr 0.5 CoO 3-d (SSC) (0≤d0.8 Sr 0.2 VO 3-d (LSV) (0≤d<3).
[0051] The metal-supported solid oxide fuel cell prepared in this example has a maximum power density of 400mW / cm at 650°C 2 .
Embodiment 3
[0053] The preparation process and composite layer structure are the same as in Example 1, except that the electrolyte material is scandium oxide stabilized zirconia (SSZ), and the cathode side electrode materials are Ag and La 0.8 Sr 0.2 MnO 3-d (LSM) (0≤d0.8 Y 0.2 TiO 3-d (SYT) (0≤d<3).
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Abstract
A provided metal-supported solid oxide fuel cell comprises an electrolyte layer and porous electrode precursor layers at two sides of the electrolyte layer, an anode active material is deposed on the hole inner wall of the porous electrode precursor layer at one side for forming the cell anode, a cathode active material is deposed on the hole inner wall of the porous electrode precursor layer at the other side for forming the cell cathode, and the porous electrode precursor layers at two sides both comprise a porous alloy layer. According to the technical scheme, a rare earth ceramic material in a cell support of a total ceramic structural solid oxide fuel cell is replaced by alloy, so that cost is substantially reduced. The cell support is prepared by utilizing conventional ceramic molding technology, so that the technology is simplified, the cost is low, the operability is high, and batch production is facilitated. The anode material and the cathode material are deposed at the hole inner walls of the porous alloy electrode precursor layers at two side of the electrolyte by employing a chemical liquid-phase deposition process, so that the preparation difficulty of the electrodes of the metal-supported solid oxide fuel cell is solved, and the metal-supported solid oxide fuel cell has good electrochemical properties.
Description
technical field [0001] The invention relates to a solid oxide fuel cell, in particular to a metal-supported solid oxide fuel cell and a preparation method thereof. Background technique [0002] Solid oxide fuel cells (SOFC) use hydrogen, natural gas, city gas, liquefied petroleum gas, biomass gasification gas, etc. as fuels to directly convert fuel chemical energy into electrical energy. Because SOFC has the characteristics of rich fuel, clean and efficient, and combined heat and power, it can be widely used in large-scale power plants, distributed power plants, and household heat and power co-suppliers. It is considered to be a transformative technology for future power plants. The SOFC single cell is composed of a dense ceramic electrolyte and a porous cathode and anode. The traditional battery structure uses a thicker electrolyte or cathode as a support. The operating temperature of the battery is generally 900-1000 o c. At present, most research works use 1-2mm thick c...
Claims
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