Nitrogen-doped hollow activated carbon nanofibers as high performance supercapacitor electrodes

Qiang Xu, Xiaoliang Yu, Qinghua Liang, Yu Bai, Zheng Hong Huang, Feiyu Kang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

42 Citations (Scopus)

Abstract

Nitrogen-doped hollow activated carbon nanofibers (HACNFs) have been prepared by the concentric electrospinning and the following NH3 activation. The as-obtained samples were directly used as supercapacitor electrode without binders and conductive additives. Owing to the unique hollow architecture and high N-doping level (8.2%), the HACNFs exhibit a high specific capacitance of 197 F g-1 at 0.2 A g-1, which is 1.33 times than that of the solid electrospun nanofibers activated in the same condition. The samples also possess a superior rate capability of 72.1% (143 F g-1) at 20 A g-1 and long-term cycling stability with a retention of 98.6% after 1000 cycles at 5 A g-1 in 6 M KOH.

Original languageEnglish
Pages (from-to)84-88
Number of pages5
JournalJournal of Electroanalytical Chemistry
Volume739
DOIs
Publication statusPublished - 15 Feb 2015
Externally publishedYes

Keywords

  • Concentric electrospinning
  • Hollow activated carbon nanofibers
  • Nitrogen doping
  • Supercapacitor

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

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