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Effects of pore structures on electrochemical behaviors of polyacrylonitrile-based activated carbon nanofibers by carbon dioxide activation

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2014, 15(1), pp.71-76
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General

이혜민 1 Kim Hong-Gun 2 An Kay-Hyeok 1 KIM Byung-Joo 1

1(재) 한국탄소융합기술원
2전주대학교

Accredited

ABSTRACT

Activated carbon nanofibers (ACNF) were prepared from polyacrylonitrile (PAN)-basednanofibers using CO2 activation methods with varying activation process times. The surfaceand structural characteristics of the ACNF were observed by scanning electron microscopyand X-ray diffraction, respectively. N2 adsorption isotherm characteristics at 77 K were confirmedby Brunauer-Emmett-Teller and Dubinin-Radushkevich equations. As experimentalresults, many holes or cavernous structures were found on the fiber surfaces after the CO2activation as confirmed by scanning electron microscopy analysis. Specific surface areas andpore volumes of the prepared ACNFs were enhanced within a range of 10 to 30 min of activationtimes. Performance of the porous PAN-based nanofibers as an electrode for electricaldouble layer capacitors was evaluated in terms of the activation conditions

Citation status

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