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

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...

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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

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