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Low-temperature preparation method of zirconium-based ceramic electrolyte membrane for fuel cell

A ceramic electrolyte and fuel cell technology, applied in fuel cells, electrolytes, circuits, etc., can solve the problems of low sintering density and long sintering time, and achieve high production efficiency, controllable thickness, and simple and controllable process.

Inactive Publication Date: 2018-07-13
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the disadvantages of low sintering density and long sintering time of traditional zirconium-based ceramic electrolyte membranes at low temperature, the present invention proposes a low-temperature preparation method of zirconium-based ceramic electrolyte membranes for fuel cells, which solves the problem of traditional zirconium-based ceramic electrolyte membranes at low temperatures. The shortcomings of low sintering density and long sintering time under the same conditions are conducive to improving the preparation process, improving the quality of zirconium-based ceramic electrolyte membranes, and promoting the commercial development of zirconium-based ceramic electrolyte membranes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Weigh 45 parts by mass of ZrO and 0.5 parts by mass of N,N-dimethylacetamide, mix them evenly, and then homogenize them with 45 parts by mass of ethanol through a high-energy ball mill. The speed is controlled at 1200 rpm, and the time of ball milling is controlled In 2 hours, the particle size of the zirconium source powder after ball milling was 55 microns, and a zirconium source precursor slurry with a viscosity of 16000mPa·s was obtained;

[0031] (2) Pass the zirconium source precursor slurry through isostatic pressure equipment, set the isostatic pressure to 0.8 MPa, and press it into a pointed cone array. The pointed cone height is 22 μm, and the distance between the cones is 10 μm. After molding, place it in a dry environment at 120°C and let it stand for 14 hours. After the solvent evaporates naturally, a prefabricated electrolyte membrane is obtained;

[0032](3) Put the prefabricated electrolyte membrane in a solution of sintering aid, the solvent of the ...

Embodiment 2

[0036] (1) Weigh 50 parts by mass of CaZrO 3 and 0.3 parts by mass of starch, uniformly mixed, and then homogenized with a mixed solution of 30 parts by mass of methanol and isopropanol by ball milling in a high-energy ball mill, the speed of which was controlled at 800rpm, and the time of ball milling was controlled at 5 hours. The particle size of the powder is 65 microns, and a zirconium source precursor slurry with a viscosity of 20000mPa·s is obtained;

[0037] (2) Pass the zirconium source precursor slurry through isostatic pressure equipment, set the isostatic pressure to 0.2 MPa, and press it into a cone array, the height of the cones is 20 μm, and the distance between the cones is 10 μm. After molding, place it in a dry environment at 85°C and let it stand for 30 hours. After the solvent evaporates naturally, a prefabricated electrolyte membrane is obtained;

[0038] (3) Put the prefabricated electrolyte membrane in a solution of sintering aid, the solvent of the sin...

Embodiment 3

[0042] (1) Weigh 10 parts by mass of BaZrO 3 and 0.1 parts by mass of N,N-dimethylformamide, uniformly mixed, and then homogenized with 45 parts by mass of deionized water by ball milling in a high-energy ball mill, the speed of which was controlled at 1200rpm, and the time of ball milling was controlled at 2 hours. The particle size of the zirconium source powder is 30 microns, and the obtained viscosity is a zirconium source precursor slurry of 5000mPa·s;

[0043] (2) Pass the zirconium source precursor slurry through isostatic pressure equipment, set the pressure of isostatic pressure to 2.3MPa, and press it into a cone array. The height of the cones is 30 μm, and the distance between cones is 15 μm. After molding, place it in a dry environment at 120°C and let it stand for 10 hours. After the solvent evaporates naturally, a prefabricated electrolyte membrane is obtained;

[0044] (3) Put the prefabricated electrolyte membrane in a solution of sintering aid, the solvent of...

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Abstract

The invention provides a low-temperature preparation method of a zirconium-based ceramic electrolyte membrane for a fuel cell. The low-temperature preparation method comprises the following steps: preparing a zirconium source precursor, which is obtained by mixing raw materials according to the ratio, into slurry; pressing and molding the ceramic slurry into a pointed cone array shape; carrying out copper ion and zinc ion doping, and sintering through microwave plasmas; after sintering for 0.5 to 1h, obtaining the electrolyte membrane. According to the low-temperature preparation method provided by the invention, plasmas are generated through microwave ionized gas, and are gathered on a micro-tip to form a point discharge effect, so that the ceramic membrane is rapidly heated; the doped copper ions and zinc ions can be used for effectively lowering the sintering temperature; meanwhile, added borane gas is added and is cracked, and the surface is densified, so that the uniform and denseceramic electrolyte membrane is obtained at low temperature, and furthermore, the disadvantages of a traditional zirconium-based ceramic electrolyte membrane that the sintering density under a low-temperature condition is low and the sintering time is long are solved. Furthermore, the low-temperature preparation method has very important practical significance of reducing the sintering temperature and the sintering time of zirconium-based ceramic electrolyte and improving the density.

Description

technical field [0001] The invention relates to the field of fuel cell materials, in particular to a low-temperature preparation method of a zirconium-based ceramic electrolyte membrane for a fuel cell. Background technique [0002] A fuel cell is an electrochemical power generation device composed of a cathode, an anode and an electrolyte sandwiched between them. The solid oxide fuel cell (Solid Oxide Fuel Cell, SOFC) belongs to the third generation of fuel cells. An all-solid-state chemical power generation device that directly converts chemical energy stored in fuel and oxidant into electrical energy in an efficient and environmentally friendly manner. It has high efficiency and excellent long-term performance stability. It does not require a catalyst and can greatly reduce system costs. Since solid oxide is used as the electrolyte, it has no problems such as electrolyte corrosion; the fuel has wide adaptability, and hydrogen, CO, natural gas (methane), coal gasification ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1016C04B35/48C04B35/622C04B35/63C04B35/632C04B35/64
CPCC04B35/48C04B35/622C04B35/6303C04B35/632C04B35/64C04B2235/5436C04B2235/656C04B2235/658C04B2235/666C04B2235/667C04B2235/77H01M8/1016H01M2300/0071Y02E60/50
Inventor 陈庆廖健淞
Owner CHENDU NEW KELI CHEM SCI CO LTD
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