The performance of electric double layer capacitors using particulate porous carbons derived from PAN fiber and phenol-formaldehyde resin

Kai Ping Wang, Hsisheng Teng

Research output: Contribution to journalArticlepeer-review

68 Citations (Scopus)

Abstract

Activated carbon fibers are known to contain pores with a small resistance for electrolyte migration while possessing a large electrical resistance between the fibers. A carbon powder derived from pulverization of PAN-based carbon fibers was examined as an electrode for electric double layer capacitors using H2SO4 as the electrolyte solution. The performance of conventional-type activated carbon powders derived from phenol-formaldehyde resin char was also measured for comparison. The fiber-derived carbon exhibited an electrical resistance comparable to that of the conventional carbons while showed a larger specific capacitance as well as a lesser extent of capacitance decrease at high currents due to a smaller pore resistance. An ultimate capacitance as high as 290 F g-1 can be reached for this fiber-derived carbon powder (with a BET surface area of ≈1300 m2 g-1). This large capacitance value was suggested to be associated with the high activity feature of the pore wall.

Original languageEnglish
Pages (from-to)3218-3225
Number of pages8
JournalCarbon
Volume44
Issue number15
DOIs
Publication statusPublished - 2006 Dec 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

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