Preparation of interconnected carbon nanofibers as electrodes for supercapacitors

Ya Hui Hsu, Ching Chang Lai, Chia Ling Ho, Chieh Tsung Lo

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

The interconnected carbon nanofibers were prepared by an electrospinning technique using a polymer solution composed of polyacrylonitrile (PAN), poly(acrylonitrile-co-butadiene (PAN-co-PB) copolymer, and N,N- dimethylformamide. Post-treatment including stabilization at 250 C and carbonization at 800 C converted electrospun fibers to bonded carbon nanofibers. The formation of interconnected carbon nanofibers was attributed to the decomposition of PB, which reduced the viscosity of nanofibers and caused the fusion of connecting points. As a result, the conductive pathways developed, leading to an increase in both the electrical conductivity and microcrystallite size. Electrochemical measurements revealed that the specific capacitance of the 90:10 PAN/PAN-co-PB derived carbon nanofibers was 170.2 F/g, which was about 24% higher than that of the neat PAN-derived carbon nanofibers. Furthermore, the fibers showed good cycling stability of energy storage with the retention ratio of 100% after 2000 cycles. Our results corroborated the advantage of these interconnected nanofibers.

Original languageEnglish
Pages (from-to)369-376
Number of pages8
JournalElectrochimica Acta
Volume127
DOIs
Publication statusPublished - 2014 May 1

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

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