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Preparation method of carbon fiber electrode with efficient catalytic activity to oxygen

A technology of activated carbon fiber and oxygen catalysis, which is applied in the direction of electrode manufacturing, primary battery electrodes, battery electrodes, etc., can solve the problems of troublesome preparation, no auxiliary electrodes involved, complexity, etc., and achieve low cost, small discharge polarization, and discharge performance stable effect

Inactive Publication Date: 2019-07-02
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The electrolyte of this method is a mixed aqueous solution of three acids, which is relatively complicated and troublesome to prepare; in addition, this method does not involve the auxiliary electrode used in anodic oxidation treatment

Method used

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  • Preparation method of carbon fiber electrode with efficient catalytic activity to oxygen
  • Preparation method of carbon fiber electrode with efficient catalytic activity to oxygen
  • Preparation method of carbon fiber electrode with efficient catalytic activity to oxygen

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Experimental program
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Effect test

Embodiment 1

[0040] The preparation method of high-efficiency oxygen catalytic active carbon fiber electrode, polyacrylonitrile carbon fiber is twisted and bundled into a brush, the polyacrylonitrile carbon fiber brush is used as an electrode, and the same carbon fiber brush is used as an auxiliary electrode, in a sulfuric acid electrolyte solution, continuously under the same constant current density Perform oxidation and reduction alternately for the same time to prepare electrochemically modified polyacrylonitrile carbon fiber brush electrodes. The specific process is as follows:

[0041] A commercial polyacrylonitrile carbon fiber brush is twisted and bundled into a brush. The carbon fiber brush has a diameter of 3 cm and a length of 10 cm. The polyacrylonitrile carbon fiber brush is used as a research electrode, and the same carbon fiber brush is used as an auxiliary electrode. In 2M sulfuric acid electrolyte solution, at a constant Alternate oxidation and reduction treatments were ca...

Embodiment 2

[0043] The preparation method of high-efficiency oxygen catalytic active carbon fiber electrode is to twist and bundle the polyacrylonitrile carbon fiber into a brush, use the polyacrylonitrile carbon fiber brush as an electrode, and use the same carbon fiber brush as an auxiliary electrode, in a sulfuric acid electrolyte solution, continuously under different constant current densities Perform oxidation and reduction alternately for the same time to prepare electrochemically modified polyacrylonitrile carbon fiber brush electrodes. The specific process is as follows:

[0044] Commercial polyacrylonitrile carbon fiber brushes are twisted and bundled into brushes. The diameter of the carbon fiber brushes is 3 cm and the length is 10 cm. The polyacrylonitrile carbon fiber brushes are used as research electrodes, and the same carbon fiber brushes are used as auxiliary electrodes. In 2M sulfuric acid electrolyte solution, at a constant current Alternate oxidation and reduction tre...

Embodiment 3

[0046] The preparation method of high-efficiency oxygen catalytic active carbon fiber electrode, polyacrylonitrile carbon fiber is twisted and bundled into a brush, the polyacrylonitrile carbon fiber brush is used as an electrode, and the same carbon fiber brush is used as an auxiliary electrode, in a sulfuric acid electrolyte solution, continuously under the same constant current density Alternate oxidation and reduction treatments with different times are carried out to prepare electrochemically modified polyacrylonitrile carbon fiber brush electrodes. The specific process is as follows:

[0047] A commercial polyacrylonitrile carbon fiber brush is twisted and bundled into a brush. The carbon fiber brush has a diameter of 3 cm and a length of 10 cm. The polyacrylonitrile carbon fiber brush is used as a research electrode, and the same carbon fiber brush is used as an auxiliary electrode. figure 1 , in 2M sulfuric acid electrolyte solution, alternate oxidation and reduction t...

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Abstract

The invention relates to a preparation method of a carbon fiber electrode with efficient catalytic activity to oxygen. The invention belongs to the technical field of power source materials. The preparation method of the carbon fiber electrode with efficient catalytic activity to oxygen is characterized by comprising the following steps: twisting polyacrylonitrile carbon fibers into brushes; and carrying out oxidation and reduction alternately at constant current density in sulfuric acid electrolyte solution by using a polyacrylonitrile carbon fiber brush as an electrode and an identical carbon fiber brush as an auxiliary electrode to obtain an electrochemically modified polyacrylonitrile carbon fiber brush electrode. The carbon fiber cathode for seawater dissolved oxygen batteries prepared in the invention has the advantages of high catalytic activity, good electrochemical performance, simple process and low cost.

Description

technical field [0001] The invention belongs to the technical field of electric energy materials, in particular to a preparation method of an efficient oxygen catalytic active carbon fiber electrode. Background technique [0002] Carbon fiber has become the king of new materials due to its low density, high specific strength, high and low temperature resistance, corrosion resistance, and excellent electrical and thermal conductivity. It can be widely used in military and civilian applications such as aerospace, aviation, transportation, automobiles, and electric energy. each field. [0003] The currently commercialized SWB1200 seawater dissolved oxygen battery produced by Norway's Kongsberg Simrad company uses a carbon fiber brush as the positive electrode of the seawater battery. Since the carbon fiber electrode used has not undergone surface modification treatment, its surface is relatively inert, has few active functional groups, and few electrocatalytic active sites, re...

Claims

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Application Information

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IPC IPC(8): H01M4/04H01M4/08
CPCH01M4/0452H01M4/08
Inventor 赵青桑林丁飞刘兴江任丽彬李勇辉
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST