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High-activity carbon fiber felt electrode material and preparation method and application thereof

A technology of carbon fiber felt and electrode material, which is applied in the field of highly active carbon fiber felt electrode material and its preparation, can solve the problem of low electrocatalytic activity, achieve improved electrocatalytic activity, increase active specific surface area, improve energy conversion efficiency and charge and discharge The effect of current density

Inactive Publication Date: 2017-01-04
XUCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of highly active carbon fiber mat electrode material and its preparation method and application, aiming to solve the problem of ordinary carbon fiber mat for VO 2+ / VO 2 + The problem of low electrocatalytic activity of redox couples

Method used

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  • High-activity carbon fiber felt electrode material and preparation method and application thereof
  • High-activity carbon fiber felt electrode material and preparation method and application thereof
  • High-activity carbon fiber felt electrode material and preparation method and application thereof

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preparation example Construction

[0027] Such as figure 1 As shown, the preparation method of a kind of highly active carbon fiber felt electrode material provided by the embodiment of the present invention comprises the following steps:

[0028] 1) After cutting the carbon fiber felt, put it into a container filled with acetone solution, carry out ultrasonic vibration, remove the oil stain on the surface of the carbon fiber felt, wash it repeatedly with deionized water after taking it out, and dry it for later use;

[0029] 2) Put the carbon fiber felt into a high-concentration potassium hydroxide aqueous solution, soak it at room temperature for 2 to 3 hours, and vacuum dry it after taking it out;

[0030] 3) Put the sample obtained after vacuum drying into a tube furnace, and pass through a protective gas, raise it to the target temperature at a constant rate, keep it warm at this temperature for 2 to 4 hours, and then cool it naturally to room temperature;

[0031] 4) After taking out the sample, use an a...

Embodiment 1

[0041] In this embodiment, when preparing the highly active carbon fiber felt electrode material for all-vanadium redox flow battery, the following steps are adopted:

[0042] 1) Cut the carbon fiber felt into a size of 30mm×30mm×5mm, put it into a beaker filled with acetone solution, and place the beaker in an ultrasonic washing tank for 30 minutes to remove the oil on the surface of the carbon fiber felt. After taking it out, wash it repeatedly with deionized water, and put it in an oven to dry at 60°C for later use.

[0043] 2) Prepare 6 mol / L potassium hydroxide aqueous solution, put the cut carbon fiber mat into the solution, soak it at room temperature for 3 hours, take it out and put it in a vacuum drying oven for 12 hours at 60°C.

[0044] 3) Put the sample into a tube furnace, and pass nitrogen into the furnace as a protective gas protection, first raise the furnace temperature to 800°C at a constant rate of 5°C / min, and then keep it at this temperature for 2 hours, a...

Embodiment 2

[0053] In this embodiment, when preparing the highly active carbon fiber felt electrode material for all-vanadium redox flow battery, the following steps are adopted:

[0054] 1) Cut the carbon fiber felt into a size of 50mm×50mm×5mm, put it into a beaker filled with acetone solution, and place the beaker in an ultrasonic washing tank for 30 minutes to remove the oil on the surface of the carbon fiber felt. After taking it out, wash it repeatedly with deionized water, and put it in an oven to dry at 60°C for later use.

[0055] 2) Configure an aqueous solution of 8 mol / L potassium hydroxide. Put the carbon fiber felt into the solution and soak it at room temperature for 3 hours, take it out and put it in a vacuum drying oven for 12 hours at 60°C.

[0056] 3) Put the sample into a tube furnace, and feed nitrogen into the furnace as a protective gas. The furnace temperature n was first raised to 700°C at a constant rate of 8°C / min, then kept at this temperature for 2 hours, an...

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Abstract

The invention discloses a high-activity carbon fiber felt electrode material and a preparation method and application thereof. The preparation method includes the following steps that firstly, carbon fiber felt is placed in a container containing an acetone solution after being cut for ultrasonic concussion, greasy dirt on the surface of the carbon fiber felt is removed, and the carbon fiber felt is taken out, repeatedly washed with water and dried for use; secondly, the carbon fiber felt is placed in a high-concentration potassium hydroxide aqueous solution and soaked for 2-3 hours at room temperature, and the carbon fiber felt is taken out and subjected to vacuum drying; thirdly, the obtained sample is placed in a tube furnace, protective gas is introduced, the temperature is increased to target temperature at constant speed and preserved for 2-4 hours, and then the sample is naturally cooled to room temperature; fourthly, the sample is subjected to acid pickling by means of an acid solution after being taken out, then the sample is repeatedly washed with deionized water, and then the sample is dried; fifthly, the obtained sample is subjected to secondary pore broadening treatment, the second step, the third step and the fourth step are repeated, and the high-activity carbon fiber felt electrode material is prepared. Porousness of the carbon fiber surface is achieved through the simple and feasible method, and the material can be used as a vanadium redox battery cathode material.

Description

technical field [0001] The invention relates to the technical field of large-scale energy storage batteries, in particular to a high-activity carbon fiber felt electrode material and its preparation method and application. Background technique [0002] With the development of the global economy and society, human demand for electricity is showing an increasing trend. However, due to the limited resources and serious pollution to the environment, the traditional fossil energy power generation method will be difficult to meet the future society's demand for electricity. Therefore, the governments of various countries are constantly increasing investment in research and development of renewable energy such as wind energy and solar energy, and the scientific and technological circles have also set off an upsurge in scientific and technological research on renewable energy utilization technologies. Various countries have formulated renewable energy development plans. For example...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90
CPCH01M4/9083Y02E60/50
Inventor 姚川付华峰孙红张森孙友庆阮因伟
Owner XUCHANG UNIV
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