Carbon nanotube self-assembly nanofiber felt and preparation and application thereof

A technology of carbon nanotubes and nanofibers, which is applied to carbon nanotube self-assembled nanofiber felt materials and its application in all-vanadium redox flow batteries, can solve problems such as difficult practical applications, and achieve low prices and easy-to-obtain raw materials , to avoid the effect of the use of binder

Inactive Publication Date: 2017-06-20
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, carbon nanotubes show excellent electrochemical stability. However, carbon nanotubes are mostly powders, which are difficult to use in practical applications.

Method used

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  • Carbon nanotube self-assembly nanofiber felt and preparation and application thereof
  • Carbon nanotube self-assembly nanofiber felt and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Select carbon nanotubes with a diameter of 20nm and a length of 20μm, disperse a certain mass of carbon nanotubes in N,N-dimethylformamide solution, ultrasonicate for 30 minutes, prepare a carbon nanotube dispersion, and disperse a certain mass of polyacrylonitrile The powder was dissolved in the dispersion liquid, wherein the mass fraction of carbon nanotubes was 7.5%, and the mass fraction of polyacrylonitrile was 7.5%, and stirred at 60° C. for 8 hours to fully dissolve to obtain a uniformly dispersed solution. Then 10 mL of the above solution was placed in a syringe, and spinning was carried out under the conditions of 10KV voltage, 25° C., and a relative humidity of 30%, and the distance between the needle tip of the syringe and the receiving plate was 5 cm. The obtained polymer fiber mat was dried at 110° C. for 10 h, and the obtained polymer fiber mat was pre-oxidized in air at 300° C. for 2 h, then sintered at 1000° C. for 1 h in an argon atmosphere, and dried. ...

Embodiment 2

[0035] Select carbon nanotubes with a diameter of 30nm and a length of 15μm, disperse a certain mass of carbon nanotubes in N,N-dimethylformamide solution, and ultrasonicate for 30 minutes to configure a carbon nanotube dispersion, and a certain mass of polymethyl The methyl acrylate powder was dissolved in the dispersion liquid, wherein the mass fraction of carbon nanotubes was 10%, and the mass fraction of polymethyl methacrylate was 5%, and stirred at 50° C. for 24 hours to fully dissolve to obtain a uniformly dispersed solution. Then, 10 mL of the above solution was placed in a syringe, and spinning was carried out under the conditions of 15KV voltage, 25° C., and 10% relative humidity, and the distance between the needle tip of the syringe and the receiving plate was 5 cm. The obtained polymer fiber mat was dried at 110° C. for 10 h, and the obtained polymer fiber mat was pre-oxidized in air at 300° C. for 2 h, then sintered at 1000° C. for 1 h in an argon atmosphere, and ...

Embodiment 3

[0037]Select carbon nanotubes with a diameter of 30nm and a length of 15μm, disperse a certain mass of carbon nanotubes in N,N-dimethylformamide solution, ultrasonicate for 30 minutes, configure a carbon nanotube dispersion, and disperse a certain mass of polylactic acid powder Dissolve in the dispersion liquid, wherein the mass fraction of carbon nanotubes is 5%, and the mass fraction of polylactic acid is 5%, and stirred at 55° C. for 12 hours to fully dissolve to obtain a uniformly dispersed solution. Then 15 mL of the above two solutions were placed in syringes respectively, and spinning was carried out under the conditions of 20KV voltage, 25° C., and relative humidity of 15%, and the distance between the needle tip of the syringe and the receiving plate was 10 cm. The obtained polymer fiber mat was pre-oxidized in air at 300°C for 3h, then sintered at 800°C for 2h under an argon atmosphere, and dried. The diameter of fiber in the gained carbon nanotube fiber felt is abou...

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Abstract

The invention discloses a carbon nanotube self-assembly nanofiber felt, a preparation thereof and an application in an all-vanadium redox flow battery. The carbon nanotube self-assembly nanofiber felt is prepared by taking a carbon nanotube as a body and macromolecule polymer as an assembly agent according to an electrostatic spinning method. A diameter of an optical fiber is 100-1000nm, a specific surface area is 30-1000m<2>.g<-1>, and the porosity is more than 90%. The carbon nanotube nanofiber felt material prepared by the preparation method is applied to the all-vanadium redox flow battery, and the excellent electrochemical performance is shown up. The carbon nanotube self-assembly nanofiber felt has the advantages of excellent preparation performance, simple technology, good technological repeatability, low cost and environmental friendliness.

Description

technical field [0001] The invention relates to a preparation method and application of a carbon material, in particular to a carbon nanotube self-assembled nanofiber felt material and its application in an all-vanadium redox flow battery Background technique [0002] Energy and the environment are two major issues facing mankind in the 21st century. With the continuous development of economy and society, the human demand for energy is increasing day by day. However, on the one hand, traditional fossil energy reserves are limited and cannot meet the needs of social development. On the other hand, excessive consumption of fossil energy has brought serious environmental problems. In order to solve the dual problems of energy shortage and environmental pollution, the development of renewable clean energy, such as solar energy and wind energy, is crucial. However, solar power generation and wind power generation are discontinuous and unstable, and are greatly affected by the n...

Claims

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Application Information

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IPC IPC(8): H01M4/96H01M4/88H01M8/18
CPCH01M4/8663H01M4/8825H01M4/96H01M8/188Y02E60/50
Inventor 张华民许驰李先锋刘涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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