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Activation method of carbon fiber electrode material using polyacrylonitrile carbon fiber

A technology of polyacrylonitrile carbon fiber and carbon fiber electrode, which is applied in the direction of carbon fiber, fiber treatment, textiles and paper making, and can solve the problem of limited electrochemical activity of carbon fiber

Inactive Publication Date: 2012-05-30
DALIAN XINGKE CARBON FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electrochemical activity of untreated carbon fibers is limited. For example, the chromium negative electrode reaction of iron-chromium redox flow battery, only after loading gold and other precious metal catalysts or after special treatment such as high temperature, carbon fibers have electrode activity.

Method used

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  • Activation method of carbon fiber electrode material using polyacrylonitrile carbon fiber
  • Activation method of carbon fiber electrode material using polyacrylonitrile carbon fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment l

[0013] Industrial polyacrylonitrile carbon fiber carbonized at about 1300°C, with a concentration of no more than 0.6%

[0014] After impregnating the carbon fiber woven cloth in the acetone solution of cyclocyanide resin for 1-5 minutes, heat up to 630°C under the condition of 60-0mmHg low vacuum, put in 1 atm air, and then evacuate, repeat 10 times, the temperature is naturally at 630- Fluctuate within 780'C, after about 40 minutes, cool down naturally. After treatment, the surface properties of carbon fibers are improved, as shown in Table I data. Increased electrode activity

[0015] More than 3 times, as shown in Figure l.

Embodiment 2

[0017] Industrially, polyacrylonitrile carbon fiber carbonized at about 1300°C is impregnated with carbon fiber woven cloth for 1-5 minutes in acetone solution of epoxy resin with a concentration of no more than 0.5%, and the temperature is raised to 60-0mmHg under low vacuum conditions. 600°C, put in 300-400mmHg air, then evacuate, repeat 8 times, the temperature will naturally fluctuate within 600-714°C, after about 30 minutes, cool down naturally. The surface properties of the treated carbon fiber are improved, and the electrode activity is increased by more than 3 times, as shown in Figure 1.

Embodiment 3

[0019] In the industry, polyacrylonitrile carbon fiber carbonized at about 1300 ℃, in the epoxy resin acetone solution with a concentration of no more than 0.5%, the carbon fiber woven cloth after impregnation treatment for 1-5 minutes is under the low vacuum condition of 60-0 mmHg, Raise the temperature to 660°C and put in 300-500 mmHg air, then pump it out and repeat it 8 times. The temperature will naturally fluctuate within 550-680°C. After about 20 minutes, it will cool down naturally. The surface properties of the treated carbon fiber are improved, and the electrode activity is increased by 3 times as shown in Figure 1.

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Abstract

The invention belongs to an activation method of a carbon fiber electrode material. The invention adopts polypropylene carbon fiber weaved cloth soaked with epoxy resin as a raw material, and comprises the following steps of injecting air in a short time at a low vacuum condition with a temperature 600-700 DEG C, then performing vacuumization and natural cooling; thereby the surface properties of the carbon fiber cloth are improved, and the electrode activity is increased by more than 3 times.

Description

[0001] technical field [0002] The invention belongs to an activation method of a carbon fiber electrode material using polyacrylonitrile carbon fiber. Background technique [0003] Carbon fiber products have a series of useful properties such as good corrosion resistance, electrical conductivity, and porosity. [0004] physical and chemical properties. It can be used as an electrode or auxiliary material for various types of batteries, and is one of the basic materials for the development of new energy storage batteries. However, the electrochemical activity of untreated carbon fibers is limited. For example, the chromium negative electrode reaction of iron-chromium redox flow batteries can only be active when loaded with precious metal catalysts such as gold or after special treatment such as high temperature. The United States has studied the influence of different carbon fiber felts, different carbonization temperatures, chemical purification treatments, and different...

Claims

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Application Information

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IPC IPC(8): D06M11/74D06M101/40
Inventor 程显军肖颖
Owner DALIAN XINGKE CARBON FIBER
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