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Chae, Han Gi
Polymer nano-composites and Carbon Fiber Laboratory (P&C Lab)
Research Interests
  • Polymer Physics/ Processing, Carbon Nano-materials, Ultra high performance/ multifuctional nano-composites, Smart textile/ fiber

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Structure and electrochemical properties of activated polyacrylonitrile based carbon fibers containing carbon nanotubes

Cited 20 times inthomson ciCited 19 times inthomson ci
Title
Structure and electrochemical properties of activated polyacrylonitrile based carbon fibers containing carbon nanotubes
Author
Jagannathan, SudhakarChae, Han GiJain, RahulKumar, Satish
Keywords
Activated carbon; Carbon nanotubes; Electrochemical capacitor; Polyacrylonitrile
Issue Date
2008-12
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF POWER SOURCES, v.185, no.2, pp.676 - 684
Abstract
Solution spun polyacrylonitrile (PAN), PAN/multi-wall carbon nanotube (MWCNT), and PAN/single-wall carbon nanotube (SWCNT) fibers containing 5 wt.% carbon nanotubes were stabilized in air and activated using CO2 and KOH. The surface area as determined by nitrogen gas adsorption was an order of magnitude higher for KOH activated fibers as compared to the CO2 activated fibers. The specific capacitance of KOH activated PAN/SWCNT samples was as high as 250 F g-1 in 6 M KOH electrolyte. Under the comparable KOH activation conditions, PAN and PAN/SWCNT fibers had comparable surface areas (BET surface area about 2200 m2 g-1) with pore size predominantly in the range of 1-5 nm, while surface area of PAN/MWCNT samples was significantly lower (BET surface area 970 m2 g-1). The highest capacitance and energy density was obtained for PAN/SWCNT samples, suggesting SWCNT advantage in charge storage. The capacitance behavior of these electrodes has also been tested in ionic liquids, and the energy density in ionic liquid is about twice the value obtained using KOH electrolyte. ⓒ 2008 Elsevier B.V. All rights reserved.
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DOI
10.1016/j.jpowsour.2008.08.093
ISSN
0378-7753
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MSE_Journal Papers
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