Paper Title:
Preparation and Characterization of Porous Si/Carbon Fibers
  Abstract

In this work, poly(amide imide) (PAI) fibers containing various silicon content ratios were prepared for the precursor of carbon fibers by electrospinning method from 25 wt.% PAI in dimethylformamide (DMF) solution. The fibers were stabilized and then subsequently carbonized in a flow of nitrogen to obtain porous Si/carbon fibers. The morphologies and the crystalline structures of the Si/CFs were characterized by scanning electron microscopy (SEM) and X-ray diffractometer (XRD). The electrochemical behaviors of the Si/CFs were observed by cyclic voltammetry tests. The experimental results indicated that the Si/CFs exhibited convoluted structure and wrinkled surface morphology. The silicon particles had a uniform diameter of approximately 1 μm. And the electrochemical activity of the Si/CFs was gradually improved due to the buffering effect of the large Si volume expansion and shrinkage. In addition, the fibers exhibited large accessible surface area, high reversible capacity, and relatively good cycling performance at high current densities. Consequently, it was found that the introduction of silica could affect the electrochemical properties of the CFs, and the Si/CFs might have potential applications for various fields of electrochemical materials.

  Info
Periodical
Advanced Materials Research (Volumes 123-125)
Edited by
Joong Hee Lee
Pages
1087-1090
DOI
10.4028/www.scientific.net/AMR.123-125.1087
Citation
K. H. Jung, S. J. Park, "Preparation and Characterization of Porous Si/Carbon Fibers", Advanced Materials Research, Vols. 123-125, pp. 1087-1090, 2010
Online since
August 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Yong Tan, Hua Zhang, Hai Hui Liu, Li Chen Hou, Yan Mei Jin, Xing Xiang Zhang
Chapter 2: Chemical Fiber
Abstract:Pristine polyacrylonitrile (PAN)-base carbon fibers (P-CFs) was functionalized with 4-Aminobenzoic acid via ‘‘direct’’ Friedel-Crafts...
219
Authors: Rong Hui Wei, Kai Du, Xiao Yang Gong, Qing Dong Chen, Hai Bin Yang
Chapter 1: Surface Engineering/Coatings
Abstract:A core-shell structure material, carbon fiber/MoS2 was prepared by a surface modification precipitation process in aqueous...
102
Authors: Zhi Tao Lin, Bo Zhu, Xue Lin, Yang Chen, Yu Zhen Liu
Chapter 5: Material Science and Technology
Abstract:The cyclic voltammograms (CVs) of polyacrylonitrile (PAN)-based carbon fibers (CFs) were measured in different electrolyte aqueous solutions,...
832