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2011 | 120 | 1 | 66-69
Article title

Enhanced Capacitance of Porous Carbon Electrodes through Deposition of Small Amounts of NiO

Content
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Languages of publication
EN
Abstracts
EN
Amorphous carbon and NiO/carbon composites were used as an electrode material for supercapacitors. The investigations were performed to evaluate the influence of the Ar/C_2H_2 ratio on the capacitance values of carbon and NiO/carbon electrodes. The surface morphology of the carbon electrodes changes from snowflake-like to columnar with the increase of the Ar/C_2H_2 ratio. The Raman scattering spectroscopy results demonstrated that the I_{D}/I_{G} ratio decreases from 1.33 to 0.91 with the increase of the Ar/C_2H_2 ratio. It indicates the decrease of the sp^2 bonded carbon in the coatings. The specific capacitance of the carbon electrodes increases with the increase of the Ar/C_2H_2 ratio. The NiO/carbon electrodes show capacitance values 10 times larger as those of carbon electrodes. The largest specific capacitance of 27.7 F/g was obtained for NiO/carbon electrode, when carbon coating was deposited under Ar/C_2H_2=27.
Keywords
Contributors
  • Lithuanian Energy Institute, Breslaujos 3, LT-4440, Kaunas, Lithuania
  • Kaunas University of Applied Sciences, Pramonės 20, LT-50468, Kaunas, Lithuania
  • Lithuanian Energy Institute, Breslaujos 3, LT-4440, Kaunas, Lithuania
  • Kaunas University of Technology, Studentu 50, LT-51368, Kaunas, Lithuania
  • Lithuanian Energy Institute, Breslaujos 3, LT-4440, Kaunas, Lithuania
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv120n117kz
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