Chemical vapor-deposited carbon nanofibers on carbon fabric for supercapacitor electrode applications
Autor: | Bahgat Sammakia, John James Turner, Charles R. Westgate, Gaind P. Pandey, Yang Gao |
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Jazyk: | angličtina |
Předmět: |
Supercapacitor
Cyclic voltammetry Argon Materials science Nano Express Carbon nanofiber Scanning electron microscope chemistry.chemical_element Nanochemistry Nanotechnology Water-assisted chemical vapor deposition Chemical vapor deposition Condensed Matter Physics Carbon nanofibers chemistry Chemical engineering Materials Science(all) Transmission electron microscopy Electrode Carbon fabric General Materials Science |
Zdroj: | Nanoscale Research Letters |
ISSN: | 1556-276X |
DOI: | 10.1186/1556-276x-7-651 |
Popis: | Entangled carbon nanofibers (CNFs) were synthesized on a flexible carbon fabric (CF) via water-assisted chemical vapor deposition at 800°C at atmospheric pressure utilizing iron (Fe) nanoparticles as catalysts, ethylene (C2H4) as the precursor gas, and argon (Ar) and hydrogen (H2) as the carrier gases. Scanning electron microscopy, transmission electron microscopy, and electron dispersive spectroscopy were employed to characterize the morphology and structure of the CNFs. It has been found that the catalyst (Fe) thickness affected the morphology of the CNFs on the CF, resulting in different capacitive behaviors of the CNF/CF electrodes. Two different Fe thicknesses (5 and 10 nm) were studied. The capacitance behaviors of the CNF/CF electrodes were evaluated by cyclic voltammetry measurements. The highest specific capacitance, approximately 140 F g−1, has been obtained in the electrode grown with the 5-nm thickness of Fe. Samples with both Fe thicknesses showed good cycling performance over 2,000 cycles. |
Databáze: | OpenAIRE |
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