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Method for preparing solid oxide fuel cell and entire cell thereof at low temperature

A solid oxide, fuel cell technology, applied in solid electrolyte fuel cells, fuel cell components, battery electrodes, etc., can solve the problems of unfavorable energy saving, high energy consumption, and the double-layer membrane is easy to warp in one direction, etc. Achieve the effect of not easy to warp, low energy consumption, and avoid unidirectional warpage

Inactive Publication Date: 2009-11-11
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] like figure 1 As shown, the double-layer film is easy to warp in one direction during the sintering process; in addition, high-temperature sintering consumes a lot of energy, which is not conducive to energy saving

Method used

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  • Method for preparing solid oxide fuel cell and entire cell thereof at low temperature
  • Method for preparing solid oxide fuel cell and entire cell thereof at low temperature
  • Method for preparing solid oxide fuel cell and entire cell thereof at low temperature

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0047] Example 1. Electrolyte supporting the whole battery:

[0048] YSZ powder used (median diameter D 50 =0.26 μm) and foaming agent graphite (1-2 μm in particle size) are commercial powders. First, add solvent alcohol, xylene, dispersant fish oil, fully ball mill and disperse evenly; then add polyethylene glycol, butyl benzyl phthalate and polyvinyl butyral, fully ball mill and disperse evenly. The mixed slurry is sieved and vacuum defoamed.

[0049] Then, the three layers of porous membrane-dense electrolyte-porous membrane are casted layer by layer, dried, and stamped, and then heated at a rate of 40-180°C / h, and kept at 600°C and 1200-1500°C for 2-10 hours respectively. The thickness of the porous membrane is 10-50 μm, and the porosity is greater than 60 percent; the thickness of the dense electrolyte is 100-300 μm, and the density is greater than 96 percent.

[0050] Apply molten polycrystalline adhesive to the edge of the composite sheet, and apply 1 to 3 mol / L Ni(N...

example 2

[0052] Example 2, the anode supports the whole battery:

[0053] YSZ powder used (median diameter D 50 =0.26 μm) and foaming agent graphite (1-2 μm in particle size) are commercial powders. Add solvent alcohol, xylene, dispersant fish oil, fully ball mill to disperse evenly, then add polyethylene glycol, butyl benzyl phthalate and polyvinyl butyral, fully ball mill to disperse evenly. The mixed slurry is sieved and vacuum defoamed. Then the porous membrane-dense electrolyte-porous membrane is cast layer by layer, dried and stamped, then the temperature is raised at a rate of 40-180°C / h, and the temperature is kept at 600°C and 1200-1500°C for 2-10 hours respectively. The thickness of the porous membrane on the anode side is 300-1000 μm, and the porosity is greater than 60%; the thickness of the dense electrolyte is 10-50 μm, and the density is greater than 96%; the thickness of the porous membrane on the cathode side is 10-50 μm, and the porosity is greater than 60%.

[005...

example 3

[0056] Example 3, cathode supporting the whole battery:

[0057] YSZ powder used (median diameter D 50 =0.26 μm) and foaming agent graphite (1-2 μm in particle size) are commercial powders. Add solvent alcohol, xylene, dispersant fish oil, fully ball mill to disperse evenly, then add polyethylene glycol, butyl benzyl phthalate and polyvinyl butyral, fully ball mill to disperse evenly. The mixed slurry is sieved and vacuum defoamed. Then the porous membrane-dense electrolyte-porous membrane is cast layer by layer, dried and stamped, then heated at a rate of 40-180°C / h, and kept at 600°C and 1200-1500°C for 2-10h respectively. The thickness of the porous membrane on the cathode side is 300-1000 μm, and the porosity is greater than 60%; the thickness of the dense electrolyte is 10-50 μm, and the density is greater than 96%; the thickness of the porous membrane on the anode side is 10-50 μm, and the porosity is greater than 60%.

[0058] Apply molten polycrystalline adhesive to...

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Abstract

The invention discloses a method for preparing a solid oxide fuel cell and an entire cell thereof at low temperature, which comprises the steps of: firstly conducting tape casting layer by layer for three times or stratified tape casting co-decompression, then obtaining a porous membrane / dense electrolyte / porous three-layer membrane by co-firing at low temperature, and then impregnating anode materials at one side and cathode materials at the other side, and finally obtaining the entire cell by sintering at low temperature. The relative density of a YSZ / GDC dense electrolyte in the three-layer membrane is higher than 96 percent and the porosity of the porous layer is greater than 60 percent. The impregnating mass fraction of the composite anodes of a NiO / CuO isoelectronic conductance phase and a doped ZrO2 / CeO2 plasma ion conductance phase reaches 40-70wt percent; and the impregnating mass fraction of the composite cathodes of an ion-electron mixed conductor or ion and electron reaches 40-60wt percent. The preparation method has the advantages of fewer processes, wide application of technology to the industry, low cost and good industrial prospects. The intensity of the obtained entire cell is relatively high, and the shape and size thereof are stable and reliable in preparation process and running.

Description

technical field [0001] The invention relates to a solid oxide fuel cell technology, in particular to a solid oxide fuel cell and a low-temperature preparation method for the whole cell. Background technique [0002] Solid oxide fuel cell (SOFC) is an energy conversion device that directly converts the chemical energy of fuel into electrical energy. In addition to the characteristics of high energy utilization, environmental protection, and modularization, it also has many advantages that other types of fuel cells cannot match: Suitable for a wide range of fuels, except for H 2 In addition to CO, natural gas, coal gas, and other hydrocarbons can also be directly used as fuel; no need to use noble metal electrodes, which can effectively reduce costs; the exhausted waste heat can be fully utilized to make a combined heat and power device, so that the overall efficiency can reach 80%. Therefore, the research and development of SOFCs are receiving more and more attention worldwi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/10H01M8/02H01M4/86H01M4/88
CPCY02E60/521Y02E60/50
Inventor 韩敏芳刘泽郑紫薇程凌志彭苏萍
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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