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A nanometer or nanometer porous carbon fiber bundle, a preparing method thereof and applications of the bundle

A nanoporous carbon and fiber bundle technology, which is applied in the fields of fiber chemical characteristics, textiles and papermaking, hybrid capacitor electrodes, etc., can solve the problems that the diameter of the drawn fiber cannot be easily controlled, it is difficult to prepare carbon fiber bundles on a large scale, and the conditions are harsh, etc., to achieve Good electrochemical performance, controllable microstructure, and controllable diameter

Inactive Publication Date: 2015-02-11
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although chemical vapor deposition can produce carbon nanotube arrays and draw from them to form continuous carbon fiber bundles (7. Jiang, K., Li, Q. & Fan, S. Nanotechnology: Spinning continuous carbon nanotube yarns. Nature419, 801-801, (2002).), but the obtained carbon fiber bundles often contain metal catalysts, which are difficult to completely remove; and only the so-called "super-aligned" carbon nanotube arrays can pull out carbon fiber bundles with good quality; and the diameter of the drawn fiber cannot be It is easy to control; in addition, the process equipment is complicated, the cost is high, and the conditions are harsh, so it is difficult to prepare continuous and pure carbon fiber bundles on a large scale
[0006] At present, the fiber bundles prepared by electrospinning are polymer fiber bundles (8.Smit, E., U.&Sanderson,R.D.Continuous yarns from electrospun fibers.Polymer46,2419-2423,(2005);9.Teo,W.-E.,Gopal,R.,Ramaseshan,R.,Fujihara,K.&Ramakrishna,S.A dynamic liquid support system for continuous electrospun yarn fabrication. Polymer48, 3400-3405, (2007).), there is no research on electrospun polymer fiber bundles formed by continuous spinning and carbonization to form nano-carbon fiber bundles or nanoporous carbon fiber bundles

Method used

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  • A nanometer or nanometer porous carbon fiber bundle, a preparing method thereof and applications of the bundle
  • A nanometer or nanometer porous carbon fiber bundle, a preparing method thereof and applications of the bundle
  • A nanometer or nanometer porous carbon fiber bundle, a preparing method thereof and applications of the bundle

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preparation example Construction

[0023] The present invention provides a method for preparing nanometer or nanoporous carbon fiber bundles, wherein the method comprises the following steps: (1) Suspending the precursors prepared by electrospinning a solution or melt containing spinnable polymers in the liquid phase In the receiving screen; (2) extracting the raw silk in the liquid-phase receiving screen at a speed of 5-60 rpm and winding the raw silk onto the silk take-off shaft to obtain a continuous directional array of raw silk bundles; ( 3) Heating and carbonizing the raw filament bundles in sections.

[0024] According to the present invention, the spinnable polymer can be any polymer that can be suspended in the liquid-phase receiving screen by nano wire bundles through electrospinning technology, preferably, it can be polyacrylonitrile, polymethacrylate, One or more of polyvinylpyrrolidone, polyvinyl alcohol, polystyrene and polylactic acid, preferably one or more of polyacrylonitrile, polymethacrylate...

Embodiment 1

[0064]At 80°C, polyacrylonitrile was dissolved in N,N-dimethylformamide at a mass ratio of 1:9 to prepare a solution of polyacrylonitrile in N,N-dimethylformamide. Then carry out electrospinning, wherein the consumption of solution is 1mL, the diameter of the metal needle of the glass tube is 0.7mm, and the metal needle of the glass tube is inclined at 35.9 degrees with the horizontal line, the voltage of the high-voltage power supply is 15kV, and the liquid-phase receiving screen is Distilled water, the distance between the spinning nozzle and the liquid-phase receiving screen is 15 cm, and the extrusion rate of the nozzle is 1 ml / hour; after the raw silk prepared by electrospinning is suspended in the liquid-phase receiving screen to form a fiber film, the The raw silk in the liquid-phase receiving screen is extracted at a speed of 1 minute and the raw silk is wound on the take-off shaft to obtain a continuous directional arrangement of the raw silk; then, the raw silk is hea...

Embodiment 2

[0066] Carbon nanofiber bundles were prepared in the same manner as in Example 1, except that the raw filaments in the liquid-phase receiving screen were extracted at a speed of 10 rpm. As a result, continuous nanocarbon fiber bundles with an average diameter of 300 microns, an average length of 5 cm, and an average specific surface area of ​​10 square meters per gram were obtained.

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Abstract

A preparing method of a nanometer or nanometer porous carbon fiber bundle is disclosed. The method includes following steps of: (1) suspending precursor fiber prepared by a solution or a melt containing spinnable polymer through electrostatic spinning into a liquid carrying plate; (2) extracting the precursor fiber in the liquid carrying plate at a speed of 5-60 r / min and winding the precursor fiber onto a fiber taking shaft to obtain a continuous directionally arranged precursor fiber bundle; and (3) heating the precursor fiber bundle by sections and charing. The method integrates electrostatic spinning, continuous wiredrawing and heating and charing, and obtains the continuous nanometer or nanometer porous carbon fiber bundle. The diameter, the length and the microstructure of the obtained nanometer or nanometer porous carbon fiber bundle are controllable. The nanometer or nanometer porous carbon fiber bundle prepared by the method shows good electrochemical performance when being applied in the field of energy storage devices, especially as an electrode material of supercapacitors.

Description

technical field [0001] The invention relates to a method for preparing nano or nano porous carbon fiber bundles, the nano or nano porous carbon fiber bundles prepared by the method, and the application of the nano or nano porous carbon fiber bundles in energy storage devices. Background technique [0002] In recent years, flexible / wearable energy storage devices (1. Koroneos, C., Spachos, T. & Moussiopoulos, N. Exergy analysis of renewable energy sources. Renewable Energy28, 295-310, (2003); 2. Shim, B.S. , Chen, W., Doty, C., Xu, C. & Kotov, N.A. Smart Electronic Yarns and Wearable Fabrics for Human Biomonitoring made by Carbon Nanotube Coating with Polyelectrolytes. Nano Letters 8, 4151-4157, (2008); 3. Park, S.&Jayaraman,S.Smart Textiles:Wearable Electronic Systems.MRS Bulletin28,585-591,(2003)) and braidable linear flexible energy storage devices (4.Wang,K.,Meng,Q.,Zhang,Y .,Z.W.&Miao*,M.High-Performance Two-Ply Yarn Supercapacitors Based on Carbon Nanotubes and Polyani...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/14D01F9/22D01F9/21D01F9/26H01G11/36
CPCY02E60/13
Inventor 智林杰石琳李祥龙贾玉莹何海勇
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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