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Electrode catalyst, composite electrode and preparation process of electrode catalyst

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

Active Publication Date: 2021-08-17
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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  • Electrode catalyst, composite electrode and preparation process of electrode catalyst
  • Electrode catalyst, composite electrode and preparation process of electrode catalyst
  • Electrode catalyst, composite electrode and preparation process of electrode catalyst

Examples

Experimental program
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Effect test

preparation example Construction

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

[0035] (1) Preparation of electrode substrate;

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

Embodiment 1

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

[0054] (1) Preparation of electrode substrate;

[0055] Soak the titanium foam substrate in 30% PTFE solution for 10 h, and then dry it at room temperature for 12 h. Afterwards, the above materials were put into a muffle furnace for heat treatment at 370° C. for 30 minutes, and then taken out to dry at room temperature. Apply a layer of 60% PTFE solution evenly on one side of the above materials, and then dry at room temperature for 30 minutes. Put the above materials into a muffle furnace for heat treatment at 370°C for 15 minutes, take them out and dry them at room temperature. Polish the other side of the above material with sandpaper until the metal layer leaks out, clean it ultrasonically, and dry it at room temperature to obtain an electrode substrate with an air diffusion layer on one side and a conductive side on the other...

Embodiment 2

[0059] Concrete preparation steps are as follows:

[0060] (1) Preparation of electrode substrate;

[0061] Soak the titanium foam substrate in 30% PTFE solution for 10 h, and then dry it at room temperature for 12 h. Afterwards, the above materials were put into a muffle furnace for heat treatment at 370° C. for 30 minutes, and then taken out to dry at room temperature. Apply a layer of 60% PTFE solution evenly on one side of the above materials, and then dry at room temperature for 30 minutes. Put the above materials into a muffle furnace for heat treatment at 370°C for 15 minutes, take them out and dry them at room temperature. Grind the other side of the above material with sandpaper until the metal layer leaks out, clean it ultrasonically, and dry it 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 melted...

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Abstract

The present invention discloses an electrode catalyst and a preparation process of the electrode catalyst. A composite electrode takes a foamed metal or alloy material, such as foamed titanium, foamed nickel and a foamed stainless steel sheet, etc., as an electrode substrate, an air diffusion layer is prepared at one side of the substrate after treatment, and the other side of the substrate is conductive. Flame smoke particles generated by the combustion of the fuels, such as paraffin, gasoline, diesel oil or kerosene mixed with organic metal chemicals, etc., are mixed on the conductive side surface by roasting, the catalytic layer is prepared at the conductive side of the electrode substrate, and the composite electrode with the catalytic layer firmly attached is prepared through the procedures of fuel dipping combustion and calcination on the surface of the catalytic layer. The prepared composite electrode has the advantages that the preparation process is simple, the electrode catalyst is uniformly loaded, no binder or current collector is needed, and the composite electrode has higher mechanical strength and conductivity and can be better applied in practice.

Description

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

Claims

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Application Information

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Patent Type & Authority Applications(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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