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Carbon nanofiber mat, preparation method thereof, and application thereof in all-vanadium redox flow battery

A technology of nano-carbon fiber and fiber felt, which is applied in the direction of nanotechnology, nanotechnology, battery electrodes, etc., can solve the problem of cost-limited large-scale application of electrodes, and achieve good cycle stability, reduce side reactions, and excellent electrochemical performance.

Active Publication Date: 2016-07-06
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

However, the high cost limits the large-scale application of these two electrodes

Method used

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  • Carbon nanofiber mat, preparation method thereof, and application thereof in all-vanadium redox flow battery
  • Carbon nanofiber mat, preparation method thereof, and application thereof in all-vanadium redox flow battery

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Select polyacrylonitrile as the carbon source, dissolve a certain mass of polyacrylonitrile powder in N,N-dimethylformamide solution, wherein the mass fraction of polyacrylonitrile is 10%, stir at 60°C for 8 hours to fully Dissolved to obtain a clear and transparent solution. In addition, polyvinylpyrrolidone is used as a water-soluble polymer, and a certain mass of polyvinylpyrrolidone powder is dissolved in N,N-dimethylformamide solution, wherein the mass fraction of polyvinylpyrrolidone is 20%, and stirred at room temperature 8h to fully dissolve to obtain a clear and transparent solution. Then, 5 mL of the above two solutions were placed in different syringes, and spinning was carried out under the conditions of 10KV voltage, 25° C., and 10% relative humidity, and the distance between the needle tip of the syringe and the receiving plate was 5 cm. Soak the obtained polymer fiber mat in an aqueous solution for 10 hours, then dry it at 110°C for 10 hours, pre-oxidize...

Embodiment 2

[0035] Select polymethyl methacrylate as the carbon source, dissolve a certain mass of polymethyl methacrylate powder in N,N-dimethylformamide solution, wherein the mass fraction of polymethyl methacrylate is 15%, Stir at 50°C for 24h to fully dissolve to obtain a clear and transparent solution. In addition, polyvinyl alcohol is used as a water-soluble polymer, and a certain mass of polyvinyl alcohol powder is dissolved in N,N-dimethylformamide solution, wherein the mass fraction of polyvinyl alcohol is 20%, and stirred at room temperature 8h to fully dissolve to obtain a clear and transparent solution. Then 10mL of the above two solutions were placed in different syringes, and spun under the conditions of 15KV voltage, 25°C, and 20% relative humidity, and the distance between the needle tip of the syringe and the receiving plate was 5cm. The obtained polymer fiber mat was pre-oxidized in air at 200°C for 2h, then sintered at 1000°C for 1h under argon atmosphere, and dried. ...

Embodiment 3

[0037]Polylactic acid was selected as the carbon source, and a certain mass of polylactic acid powder was dissolved in anhydrous ethanolamine solution, wherein the mass fraction of polylactic acid was 20%, and stirred at 55°C for 12 hours to fully dissolve to obtain a clear and transparent solution. In addition, polyvinyl alcohol is used as a water-soluble polymer, and a certain mass of polyvinyl alcohol powder is dissolved in N,N-dimethylformamide solution, wherein the mass fraction of polyvinyl alcohol is 20%, and stirred at room temperature 8h to fully dissolve to obtain a clear and transparent solution. Then 15mL of the above two solutions were placed in syringes, and spinning was carried out under the conditions of 10KV voltage, 25°C, and 15% relative humidity, and the distance between the needle tip of the syringe and the receiving plate was 10cm. 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 atmosphe...

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Abstract

The invention discloses a carbon nanofiber mat, a preparation method thereof, and an application thereof in an all-vanadium redox flow battery. The carbon nanofiber mat takes high-molecular polymer as a carbon source, takes water-soluble polymer as a mold board, and is prepared by means of an electrostatic spinning method. The diameter of the carbon fiber ranges from 100 nm to 1000 nm, the specific surface area of the carbon fiber ranges from 30 m<2>.g<-1> to 1000 m<2>.g<-1>, and the porosity factor of the carbon fiber ranges from 90% to 95%. The carbon nanofiber mat material prepared by the above preparation method is used for electrodes of the all-vanadium redox flow battery, and the carbon nanofiber mat has excellent electrochemical performance, and is advantaged by excellent preparation performance, simple process, good process repeatability, low cost, environmental friendliness and the like.

Description

technical field [0001] The invention relates to a preparation method and application of a carbon material, in particular to a nano-carbon fiber 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 natural environment. La...

Claims

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Application Information

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IPC IPC(8): D04H1/728D06C7/04D06B3/10H01M4/96H01M4/88H01M8/18B82Y30/00B82Y40/00
CPCY02E60/50
Inventor 张华民许驰刘涛聂红娇
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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