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A kind of electrode catalyst, composite electrode and preparation process thereof

An electrode catalyst and composite electrode technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of easy detachment of the catalytic layer, high price, and difficult processing, and achieves simple and efficient preparation methods, low cost, and good catalytic performance. Effect

Active Publication Date: 2022-07-12
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such catalysts and electrode preparation methods are expensive, difficult to process, and the catalytic layer is easy to fall off.

Method used

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  • A kind of electrode catalyst, composite electrode and preparation process thereof
  • A kind of electrode catalyst, composite electrode and preparation process thereof
  • A kind of electrode catalyst, composite electrode and preparation process thereof

Examples

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Effect test

preparation example Construction

[0034] The invention provides a preparation process of a catalyst-loaded electrode, and the specific steps are as follows:

[0035] (1) Preparation of electrode substrate;

[0036] The sheet metal foam and alloy are used as the electrode substrate, and the electrode substrate is soaked in a 30%-60% PTFE (polytetrafluoroethylene) solution for 1-24 hours, and then dried at room temperature for 1-24 hours. The above materials are put into a muffle furnace, heated at 300 to 400° C. for 10 to 40 minutes, and taken out to dry at room temperature. A layer of 30% to 60% PTFE solution is evenly spread on one side of the above material, and then dried at room temperature for 20 to 40 minutes. Put the above materials into a muffle furnace, heat treatment at 300 to 400 ° C for 10 to 20 minutes, take them out to dry at room temperature, and this side is the gas diffusion layer; sand the other side of the above materials with sandpaper until the metal layer is exposed to achieve electrical...

Embodiment 1

[0053] To prepare an electrode catalyst with flame soot particles loaded on a catalytic layer, the specific preparation steps are as follows:

[0054] (1) Preparation of electrode substrate;

[0055] The foamed titanium substrate was soaked in 30% PTFE solution for 10 h, and then dried at room temperature for 12 h. After that, the above materials were put into a muffle furnace, heated at 370° C. for 30 min, and taken out to dry at room temperature. A layer of 60% PTFE solution was evenly spread on one side of the above materials, and then dried at room temperature for 30 min. The above materials were placed in a muffle furnace, heated at 370° C. for 15 min, and taken out to dry at room temperature. The other side of the above-mentioned material is polished with sandpaper until the metal layer leaks out, and after ultrasonic cleaning, it is dried at room temperature to obtain an electrode substrate with an air diffusion layer on one side and a conductive side on one side;

...

Embodiment 2

[0059] The specific preparation steps are as follows:

[0060] (1) Preparation of electrode substrate;

[0061] The foamed titanium substrate was soaked in 30% PTFE solution for 10 h, and then dried at room temperature for 12 h. After that, the above materials were put into a muffle furnace, heated at 370° C. for 30 min, and taken out to dry at room temperature. A layer of 60% PTFE solution was evenly spread on one side of the above materials, and then dried at room temperature for 30 min. The above materials were placed in a muffle furnace, heated at 370° C. for 15 min, and taken out to dry at room temperature. The other side of the above-mentioned material is polished with sandpaper until the metal layer leaks out, and after ultrasonic cleaning, it is dried at room temperature to obtain an electrode substrate with an air diffusion layer on one side and a conductive electrode on the other side;

[0062] (2) preparation of catalytic layer;

[0063] After the paraffin is me...

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Abstract

The invention discloses an electrode catalyst and a preparation process thereof. The composite electrode uses foamed metal or alloy materials such as foamed titanium, foamed nickel and foamed stainless steel sheets as the electrode substrate, and after processing, an air diffusion layer is prepared on one side of the substrate and the other is One side is conductive, and on the surface of the conductive side, the flame smoke particles generated by the combustion of fuel such as paraffin, gasoline, diesel or kerosene mixed with organometallic chemicals are smoked, and the catalytic layer is prepared on the conductive side of the electrode substrate. The surface of the layer is impregnated with fuel and burned and calcined to obtain a composite electrode with the catalytic layer firmly attached. The composite electrode prepared by the invention has the advantages of simple preparation process, uniform loading of the electrode catalyst, no need to use any binder and current collector, higher mechanical strength and electrical conductivity, and better practical application.

Description

technical field [0001] The invention belongs to the technical field of composite electrode materials, in particular to an electrode catalyst, a composite electrode and a preparation process thereof. Background technique [0002] Electrochemical oxygen reduction catalysts are widely used in energy and environmental fields, such as fuel cell cathodes, metal air battery cathodes, microbial fuel cell cathodes and other energy fields for electrochemical catalytic reduction of oxygen, as well as electrochemical reduction with oxygen in electrolysis systems. Replacing the hydrogen evolution reaction with the reaction can reduce energy consumption and reduce the generation of highly dangerous hydrogen. At the same time, traditional oxygen electrochemical reduction catalysts often use noble metal catalysts such as platinum carbon, which need to be coated on a substrate material to form electrodes during application. Such catalysts and electrode preparation methods have problems such...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/88H01M4/96H01M4/86
CPCH01M4/9083H01M4/96H01M4/8803H01M4/9041H01M4/8825H01M4/8878H01M4/8885H01M4/8652Y02E60/50
Inventor 蒲开波张凯郝巧娥李立高峰王云海
Owner XI AN JIAOTONG UNIV
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