Preparation method of spinel coating and its application in preparation of solid oxide fuel cells

A technology of spinel oxide and spinel coating, which is applied in fuel cells, coatings, metal material coating processes, etc., can solve the problems of SOFC battery stack cathode performance degradation, SOFC battery stack failure, etc., and achieve material High utilization rate, easy operation, uniform and dense texture

Active Publication Date: 2022-05-24
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

After long-term high-temperature treatment, the performance of the cathode in the SOFC stack will be greatly attenuated, eventually leading to the complete failure of the SOFC stack.

Method used

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  • Preparation method of spinel coating and its application in preparation of solid oxide fuel cells
  • Preparation method of spinel coating and its application in preparation of solid oxide fuel cells
  • Preparation method of spinel coating and its application in preparation of solid oxide fuel cells

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preparation example Construction

[0051] According to one aspect of the present invention, a preparation method of spinel coating, the preparation method comprises the following steps:

[0052] (a), provide a nitrate solution, then spray the nitrate solution on the surface of the ferritic stainless steel by means of ultrasonic atomization spraying, and then heat the ferritic stainless steel to the decomposition temperature of the nitrate solution to form an attached ferritic stainless steel Spinel oxide film on the surface;

[0053] The nitrate solution contains the metal required for the formation of the spinel coating;

[0054] (b), repeating step (a) until a spinel oxide film with a thickness of 5-50 μm is formed on the surface of the ferritic stainless steel, and sintering to prepare a spinel coating.

[0055] The preparation method of the spinel coating provided by the present invention comprises the following steps: firstly providing a nitrate solution, then spraying the nitrate solution on the surface ...

Embodiment 1

[0087] A preparation method of spinel coating, the preparation method comprises the following steps:

[0088] (1) Provide SUS430 ferritic stainless steel, use 800-mesh sandpaper to polish the stainless steel surface to a roughness of 0.9 microns on the surface of the ferritic stainless steel to remove the oxide layer on the surface and ensure that the solution can adhere to the stainless steel surface.

[0089] (2), configure copper nitrate (Cu(NO) with deionized water as solvent 3 ) 2 ) and cobalt nitrate (Co(NO) 3 ) 2 ) mixed solution, wherein the concentration range of copper nitrate is 0.1mol / L, and the concentration range of cobalt nitrate is 0.2mol / L. To ensure the copper-cobalt ratio in the final coating, the molar ratio of copper nitrate to cobalt nitrate was kept at 1:2.

[0090] (3), placing the ferritic stainless steel polished in step (1) on a hot stage, and setting the temperature of the hot stage to 270°C. At the same time, use inert gases such as nitrogen, ...

Embodiment 2

[0099] A preparation method of spinel coating, the preparation method comprises the following steps:

[0100] (1) Provide SUS430 ferritic stainless steel, use 800-grit sandpaper to polish the stainless steel surface to a roughness of 0.8 microns on the surface of the ferritic stainless steel to remove the oxide layer on the surface and ensure that the solution can adhere to the stainless steel surface.

[0101] (2), configure copper nitrate (Cu(NO) with deionized water as solvent 3 ) 2 ) and cobalt nitrate (Co(NO) 3 ) 2 ) mixed solution, wherein the concentration range of copper nitrate is 0.01mol / L, and the concentration range of cobalt nitrate is 0.02mol / L. To ensure the copper-cobalt ratio in the final coating, the molar ratio of copper nitrate to cobalt nitrate was kept at 1:2.

[0102] (3), placing the polished ferritic stainless steel in step (1) on a hot stage, and setting the temperature of the hot stage to 250°C. At the same time, use inert gas such as nitrogen, ...

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Abstract

The invention provides a method for preparing a spinel coating and its application in preparing solid oxide fuel cells, and relates to the technical field of coating materials. The preparation method of the spinel coating is to first provide a nitrate solution, and then spray the nitrate solution on the surface of the ferritic stainless steel by means of ultrasonic atomization spraying to form a spinel oxide layer attached to the surface of the ferritic stainless steel. The nitrate solution contains the metal required for the formation of the spinel coating; repeat the above steps of spraying until a 5-50 μm thick spinel oxide film is formed on the surface of the ferritic stainless steel, and sintered to prepare a spinel oxide film. Spar coating. The above preparation method has the characteristics of simple preparation process and easy operation, and can generate a spinel coating with uniform and dense texture. At the same time, the method for preparing the spinel coating by ultrasonic atomization spraying in the present application has the advantages of low energy consumption, high material utilization rate and environmental friendliness compared with the existing spinel coating preparation method.

Description

technical field [0001] The invention relates to the technical field of coating materials, in particular to a preparation method of a spinel coating and its application in preparing a solid oxide fuel cell. Background technique [0002] A fuel cell is an electrochemical device that directly converts the chemical energy of fuel into electrical energy through electrode reactions. It has the advantages of high energy conversion efficiency, low environmental pollution, low noise, high reliability and easy construction. According to the different electrolytes used, fuel cells can be divided into alkaline fuel cells, phosphoric acid fuel cells, molten carbonate fuel cells, proton exchange membrane fuel cells and solid oxide fuel cells. [0003] Solid oxide fuel cell (Solid Oxide Fuel Cell, SOFC for short) refers to a fuel cell that uses solid oxide as electrolyte and works at high temperature. Typically, zirconia (Y) stabilized with yttria is used 2 O 3 -Stabilized-ZrO 2 , refe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/12H01M8/1246
CPCC23C18/1216C23C18/1258H01M8/1246H01M2008/1293Y02E60/50
Inventor 金奕千熊星宇彭苏萍杨志宾郝国政郝旺舒
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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