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Modified carbon brush electrode and preparation method thereof

A modified carbon and carbon brush technology, which is applied in battery electrodes, circuits, electrical components, etc., can solve problems such as low output power and limit practical applications, and achieve increased output power, improved electron transfer efficiency, and improved cathode oxygen reduction reaction speed effect

Active Publication Date: 2020-09-01
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Contrary to expectations, the problem of low output power of microbial fuel cells limits its practical application

Method used

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  • Modified carbon brush electrode and preparation method thereof
  • Modified carbon brush electrode and preparation method thereof
  • Modified carbon brush electrode and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The process of the preparation method of the conductive polymer modified carbon fiber brush anode involved in this embodiment includes three steps of carbon brush acid treatment, iron oxide modified carbon brush, and conductive polymer film modified carbon brush:

[0030] (1) Carbon brush acid treatment: Soak the carbon fiber in a mixed acid with a volume ratio of concentrated sulfuric acid and concentrated nitric acid of 1:3, and treat it in a water bath at a temperature of 80°C for 2-4 hours to obtain a surface modified with oxygen-containing functional groups. Carbon brush

[0031] (2) Iron oxide modified carbon brush: The carbon brush obtained in step (1) is soaked in a mixed aqueous solution of ferric nitrate and sodium sulfate in a weight ratio of 1:1 for 2-4 hours to form Fe on the surface of the carbon brush. 3+ Transfer the carbon brush and the mixed aqueous solution to the reactor, react for 1-4h at a temperature of 120℃, take it out after natural cooling, clean it ...

Embodiment 2

[0034] The process of the preparation method of the graphene oxide / conductive polymer modified carbon fiber brush anode involved in this embodiment includes carbon brush acid treatment, iron oxide modified carbon brush, preparation of graphene oxide aqueous solution and graphene oxide / conductive polymer film modification There are four steps in carbon brushing:

[0035] (1) Carbon brush acid treatment: Soak the carbon fiber in a mixed acid with a volume ratio of 1:3 concentrated sulfuric acid and concentrated nitric acid, and treat it in a water bath at a temperature of 80°C for 2-4 hours to obtain a modified surface with oxygen-containing functional groups. Carbon brushes;

[0036] (2) Iron oxide modified carbon brush: The carbon brush obtained in step (1) is soaked in a mixed aqueous solution of ferric nitrate and sodium sulfate at a mass ratio of 1:1 for 2-4 hours to form Fe on the surface of the carbon brush. 3+ Transfer the carbon brush and the mixed aqueous solution to the re...

Embodiment 3

[0040] The process of the preparation method of in-situ growth of nitrogen-doped oxygen reduction reaction catalyst modified carbon brush cathode involved in this embodiment includes carbon brush acid treatment, iron oxide modified carbon brush, conductive polymer film modified carbon brush, and high-temperature carbonization modification There are four steps in carbon brushing:

[0041] (1) Carbon brush acid treatment: Soak the carbon fiber in a mixed acid with a volume ratio of 1:3 concentrated sulfuric acid and concentrated nitric acid, and treat it in a water bath at a temperature of 80°C for 2-4 hours to obtain a modified surface with oxygen-containing functional groups. Carbon brushes;

[0042] (2) Iron oxide modified carbon brush: The carbon brush obtained in step (1) is immersed in a mixed aqueous solution of ferric nitrate and sodium sulfate in a weight ratio of 1:1 for 2-4 hours to form Fe on the surface of the carbon brush. 3+ Transfer the carbon brush and the mixed aque...

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Abstract

The invention belongs to the technical field of microbial fuel cells. The invention relates to a modified carbon brush electrode and a preparation method thereof. The modified carbon brush electrode comprises an anode and a cathode; the preparation process comprises the following steps of: enabling the carbon brush to besubjected to acid treatment; introducingoxygen-containing functional groups into the surface of the carbon brush; using a hydrothermal synthesis method to grow iron oxide nanoparticles on the surface of the carbon brush in situ; immersing the carbon brush with the iron oxide grown on the surface into an ethanol mixed solution containing a conductive polymer monomer; sequentially adding deionized water or a solution containing a nano carbon material and hydrochloric acid, reacting iron oxide on the surface of the carbon brush with acid to generate Fe<3+>, and inducing a conductive polymer monomer near the carbon fiber to be subjected to in-situ polymerization reaction toform a conductive polymer film or a conductive polymer film containing a nano carbon material, thereby obtaining a modified carbon brush anode; and further calcining the modified carbon brush anode in an inert atmosphere to obtain the in-situ growth nitrogen-doped or iron-nitrogen-doped oxygen reduction reaction catalyst carbon brush cathode.

Description

Technical field: [0001] The invention belongs to the technical field of microbial fuel cells, and specifically relates to a modified carbon brush electrode and a preparation method thereof, and is suitable for microbial fuel cells. Background technique: [0002] Microbial Fuel Cell (MFC) is a device that uses microorganisms to directly convert the chemical energy of organic matter into electrical energy. Its basic working principle is: in the anaerobic environment of the anode chamber, the organic matter is decomposed and released under the action of microorganisms. The electrons and protons are emitted. The electrons are effectively transferred between the biological components and the anode through a suitable electron transfer mediator, and are transferred to the cathode through an external circuit to form a current. The protons are transferred to the cathode through the proton exchange membrane, and the oxidant (usually oxygen) ) The electrons obtained at the cathode are reduc...

Claims

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Application Information

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IPC IPC(8): H01M4/96H01M4/88H01M8/16
CPCH01M4/96H01M4/8878H01M8/16H01M2004/8684H01M2004/8689Y02E60/50
Inventor 邱峥辉蔺存国郑纪勇赵婷
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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