Structural feature and double-layer capacitive performance of porous carbon powder derived from polyacrylonitrile-based carbon fiber

Kai Ping Wang, Hsisheng Teng

Research output: Contribution to journalArticle

75 Citations (Scopus)

Abstract

A microporous carbon powder derived from pulverizing a polyacrylonitrile- based activated carbon fiber showed an excellent performance serving as electrodes for symmetric electric double-layer capacitors using sulfuric acid as the electrolyte. In comparison with conventional activated carbon powders derived from a phenol-formaldehyde resin, this fiber-derived carbon showed a large ultimate capacitance value and could still retain a high capacitance at high current rates. Quantitative characterization on the pore structure of these carbons was conducted. The electrochemical impedance spectra of the capacitors were adequately fitted to an equivalent circuit containing a Warburg element. The fiber-derived carbon was found to have a greater effective diffusivity for electrolyte transport due to its smaller tortuosity factor, which had a value of 4-7 times smaller than those of the conventional carbon powders. The results of oxygen chemisorption on the carbons suggested that the pore walls of the fiber-derived carbon were more populated with graphite-like crystallite edges. This feature would lead to a stronger specific adsorption and thus a higher double layer capacitance.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume154
Issue number11
DOIs
Publication statusPublished - 2007 Oct 5

Fingerprint

polyacrylonitrile
Polyacrylonitriles
carbon fibers
Powders
Carbon fibers
Carbon
carbon
Capacitance
capacitance
activated carbon
Activated carbon
Electrolytes
fibers
Fibers
grinding (comminution)
electrolytes
phenol formaldehyde
porosity
Graphite
electrochemical capacitors

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

Cite this

@article{42623407f42e477a85ab8894cac9112f,
title = "Structural feature and double-layer capacitive performance of porous carbon powder derived from polyacrylonitrile-based carbon fiber",
abstract = "A microporous carbon powder derived from pulverizing a polyacrylonitrile- based activated carbon fiber showed an excellent performance serving as electrodes for symmetric electric double-layer capacitors using sulfuric acid as the electrolyte. In comparison with conventional activated carbon powders derived from a phenol-formaldehyde resin, this fiber-derived carbon showed a large ultimate capacitance value and could still retain a high capacitance at high current rates. Quantitative characterization on the pore structure of these carbons was conducted. The electrochemical impedance spectra of the capacitors were adequately fitted to an equivalent circuit containing a Warburg element. The fiber-derived carbon was found to have a greater effective diffusivity for electrolyte transport due to its smaller tortuosity factor, which had a value of 4-7 times smaller than those of the conventional carbon powders. The results of oxygen chemisorption on the carbons suggested that the pore walls of the fiber-derived carbon were more populated with graphite-like crystallite edges. This feature would lead to a stronger specific adsorption and thus a higher double layer capacitance.",
author = "Wang, {Kai Ping} and Hsisheng Teng",
year = "2007",
month = "10",
day = "5",
doi = "10.1149/1.2775284",
language = "English",
volume = "154",
journal = "Journal of the Electrochemical Society",
issn = "0013-4651",
publisher = "Electrochemical Society, Inc.",
number = "11",

}

TY - JOUR

T1 - Structural feature and double-layer capacitive performance of porous carbon powder derived from polyacrylonitrile-based carbon fiber

AU - Wang, Kai Ping

AU - Teng, Hsisheng

PY - 2007/10/5

Y1 - 2007/10/5

N2 - A microporous carbon powder derived from pulverizing a polyacrylonitrile- based activated carbon fiber showed an excellent performance serving as electrodes for symmetric electric double-layer capacitors using sulfuric acid as the electrolyte. In comparison with conventional activated carbon powders derived from a phenol-formaldehyde resin, this fiber-derived carbon showed a large ultimate capacitance value and could still retain a high capacitance at high current rates. Quantitative characterization on the pore structure of these carbons was conducted. The electrochemical impedance spectra of the capacitors were adequately fitted to an equivalent circuit containing a Warburg element. The fiber-derived carbon was found to have a greater effective diffusivity for electrolyte transport due to its smaller tortuosity factor, which had a value of 4-7 times smaller than those of the conventional carbon powders. The results of oxygen chemisorption on the carbons suggested that the pore walls of the fiber-derived carbon were more populated with graphite-like crystallite edges. This feature would lead to a stronger specific adsorption and thus a higher double layer capacitance.

AB - A microporous carbon powder derived from pulverizing a polyacrylonitrile- based activated carbon fiber showed an excellent performance serving as electrodes for symmetric electric double-layer capacitors using sulfuric acid as the electrolyte. In comparison with conventional activated carbon powders derived from a phenol-formaldehyde resin, this fiber-derived carbon showed a large ultimate capacitance value and could still retain a high capacitance at high current rates. Quantitative characterization on the pore structure of these carbons was conducted. The electrochemical impedance spectra of the capacitors were adequately fitted to an equivalent circuit containing a Warburg element. The fiber-derived carbon was found to have a greater effective diffusivity for electrolyte transport due to its smaller tortuosity factor, which had a value of 4-7 times smaller than those of the conventional carbon powders. The results of oxygen chemisorption on the carbons suggested that the pore walls of the fiber-derived carbon were more populated with graphite-like crystallite edges. This feature would lead to a stronger specific adsorption and thus a higher double layer capacitance.

UR - http://www.scopus.com/inward/record.url?scp=34848834007&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34848834007&partnerID=8YFLogxK

U2 - 10.1149/1.2775284

DO - 10.1149/1.2775284

M3 - Article

AN - SCOPUS:34848834007

VL - 154

JO - Journal of the Electrochemical Society

JF - Journal of the Electrochemical Society

SN - 0013-4651

IS - 11

ER -