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Electrode-supported solid oxide fuel cell and production method thereof

A solid oxide, fuel cell technology, used in fuel cells, electrochemical generators, circuits, etc., can solve the problems of strength reduction and low fracture strength

Active Publication Date: 2021-09-10
SICHUAN ENERGY INTERNET RES INST TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has the following problems: the fracture strength is low, especially the characteristics of finger-shaped macropores formed by solvent extraction by phase inversion method, which make the strength decrease in the X direction more obvious

Method used

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  • Electrode-supported solid oxide fuel cell and production method thereof
  • Electrode-supported solid oxide fuel cell and production method thereof
  • Electrode-supported solid oxide fuel cell and production method thereof

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preparation example Construction

[0054] The raw materials for the preparation of the above porous layer include the second ceramic powder, the second ceramic powder includes the first scandia-stabilized zirconia and the second scandia-stabilized zirconia, the second scandia-stabilized zirconia is passed through the first scandium oxide The stabilized zirconia is obtained by calcining at 950-1100° C. for 1.5-2.5 hours, preferably the zirconia stabilized by the first scandium oxide is calcined at 1000° C. for 2 hours.

[0055] For ease of understanding, the following content abbreviates the first scandia-stabilized zirconia as SSZ, and abbreviates the second scandia-stabilized zirconia as SSZ-t, wherein, t represents the calcination temperature, for example, when the second scandia-stabilized zirconia When zirconia is obtained by calcining the first scandia-stabilized zirconia at 1000°C for 2 hours, the second scandia-stabilized zirconia is abbreviated as SSZ-1000.

[0056] In an optional embodiment, in the sec...

Embodiment 1

[0114] This embodiment provides an electrode-supported solid oxide fuel cell, the preparation process of which is as follows:

[0115] (1) Preparation of 3YSZ porous ceramic support 1 (thickness 700 μm)

[0116] Add 3mol% YSZ ceramic powder and 5wt% pore-forming agent (graphite: PMMA=3:7, mass ratio) to the ball mill pot, add absolute ethanol as the ball mill medium, and ball mill for 12 hours to obtain a slurry. Dry at 80°C to obtain 3YSZ-pore-forming agent mixed powder. Among them, the particle size of the ceramic powder is 0.5μm, and the specific surface area is 10m 2 / g.

[0117] An organic solution prepared by combining binder polyethersulfone (PESf), dispersant polyvinylpyrrolidone (PVP) and organic solvent 1-2-methylpyrrolidone (NMP) in a weight ratio of 4:1:20. Put the 3YSZ-pore forming agent mixed powder into a ball mill tank, and add an organic solution at a weight ratio of 1:1.5, then add an appropriate amount of ball mill beads and mill for 24 hours to obtain a ...

Embodiment 2

[0133] This embodiment provides an electrode-supported solid oxide fuel cell, the preparation process of which is as follows:

[0134] (1) Preparation of 4YSZ porous ceramic support (thickness 600 μm)

[0135] Add 4mol% YSZ ceramic powder and 10wt% pore-forming agent (spherical carbon powder: PMMA=3:7, mass ratio) into the ball milling tank, add absolute ethanol as the ball milling medium, and ball mill for 12 hours to obtain slurry The material was dried at 80°C to obtain 4YSZ-pore-forming agent mixed powder. Among them, the particle size of the ceramic powder is 0.1μm, and the specific surface area is 15m 2 / g.

[0136] An organic solution prepared by combining binder polyethersulfone (PESf), dispersant polyvinylpyrrolidone (PVP) and organic solvent 1-2-methylpyrrolidone (NMP) in a weight ratio of 3:0.5:18. Put the 4YSZ-pore forming agent mixed powder into a ball mill tank, and add an organic solution at a weight ratio of 1:1, then add an appropriate amount of ball mill b...

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Abstract

The invention discloses an electrode-supported solid oxide fuel cell and a production method thereof, and belongs to the technical field of fuel cells. The fuel cell comprises a porous ceramic support body produced by a phase inversion method; the porous ceramic support body is prepared from the following raw materials: a Y2O3-ZrO2 mixture containing 3-5mol% of Y2O3; and the porous ceramic support body is impregnated with an electrode material. According to the invention, the Y2O3-ZrO2 mixture containing 3-5mol% of Y2O3 is used as a main preparation raw material of the porous ceramic support body, and a mode of dipping an electrode is combined to replace a method for producing a support framework by using an electronic conductive phase and a Y2O3-ZrO2 mixture containing 8mol% of Y2O3 in the prior art; and the overall breaking strength of the support body produced by the phase inversion method and the fuel cell containing the support body can be effectively improved. The production method of the fuel cell is simple, easy to operate and suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to an electrode-supported solid oxide fuel cell and a preparation method thereof. Background technique [0002] Solid oxide fuel cell (SOFC) is a non-combustion chemical energy conversion device with an all-solid ceramic structure. The biggest difference from traditional batteries is that fuel cells are power generation equipment rather than energy storage equipment. The fuel has wide applicability and power generation. The process can also provide high-grade waste heat energy, which has broad application prospects in distributed energy supply and combined heat and power generation. Its unique advantages combined with low-carbon clean energy such as natural gas and biomass will provide important support for sustainable development. [0003] There are three main structural designs of SOFC, namely, electrolyte-supported, electrode-supported, and metal-supported. Reducing the oper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0271H01M8/1213
CPCH01M8/0271H01M8/1213C04B35/488C04B35/622C04B38/068C04B41/89C04B41/52C04B2235/3225C04B2235/5445C04B2235/5409C04B2235/6562C04B2235/6565C04B2235/6567C04B41/5045C04B41/5042C04B41/4582C04B41/0072C04B41/5027Y02E60/50Y02P70/50
Inventor 王绍荣章慧麟李汶颖李航黄祖志
Owner SICHUAN ENERGY INTERNET RES INST TSINGHUA UNIV