A kind of solid oxide fuel cell electrode material and preparation method thereof

Abstract

The invention relates to a solid oxide fuel cell electrode material and a preparation method thereof, which utilizes the thermal deformation phenomenon of a polymer material pore-forming agent, and reprocesses the polymer material pore-forming agent in the mixing process to produce a multi-dimensional Irregular pores with similar pore sizes can be used to prepare electrode materials with a three-dimensional network structure. And under the same electrode raw material and pore-forming agent content, the porosity of the electrode material obtained in the present invention can be improved by 2-5%. Closed cells will be formed, so that the porosity of the open cells will decrease, so the closed cells in the three-dimensional network pore structure obtained by the present invention will be much less, and the rate of decline in the porosity of the open cells will be significantly smaller than that of the circular hole sample, which not only effectively increases the catalytic reaction. The area improves the catalytic activity of the battery, and at the same time solves the problem of reduced electronic / ionic conductivity caused by hole defects that occur during the preparation of electrode materials.

Description

technical field [0001] The invention belongs to the field of solid oxide fuel cells (SOFC), and relates to a solid oxide fuel cell electrode material and a preparation method thereof, in particular to a solid oxide fuel cell three-dimensional network structure electrode and a preparation method thereof. Background technique [0002] As the key material component of the battery, SOFC electrode not only has high electronic / ionic conductivity, good chemical and thermal stability and certain mechanical strength, but also needs to have high catalytic activity. Catalytic activity requires catalytic components and fuel gas , full contact with air, so the cathode and anode need to have a certain porosity. There are following problems in the method for preparing stomata by adding pore-forming agent: [0003] (1) The dispersion is uneven, the prepared pores are too large, the contact area with the catalytic component is small, the catalytic activity is low, and the strength is low at...

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Problems solved by technology

[0003] (1) The dispersion is uneven, the prepared pores are too large, the contact area with the catalytic component is small, the catalytic activity is low, and the strength is low at the same time

[0004] (2) The prepared pores are circular pores. As the temperature increases, some pores form closed pores, the porosity decreases, and the catalytic activity and gas passage rate decrease.

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