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

• Authors: Z. Kavaliauskas , L. Marcinauskas , P. Valatkevicius
• 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

EN

81.15.-z; 81.05.U-; 82.47.Uv; 68.55.J-

Discipline

• 81.05.U-: Carbon/carbon-based materials(for carbon-based superconductors, see 74.70.Wz)
• 82.47.Uv: Electrochemical capacitors; supercapacitors(see also 88.80.fh Supercapacitors in renewable energy resources and applications; 84.60.Ve Energy storage systems, including capacitor banks in direct energy conversion and storage)
• 68.55.J-: Morphology of films
• 81.15.-z: Methods of deposition of films and coatings; film growth and epitaxy(for structure of thin films, see 68.55.-a; see also 85.40.Sz Deposition technology in microelectronics; for epitaxial dielectric films, see 77.55.Px)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2011
• Volume: 120
• Issue: 1
• Pages: 66-69

Dates

published

2011-07

Contributors

author

Z. Kavaliauskas

• Lithuanian Energy Institute, Breslaujos 3, LT-4440, Kaunas, Lithuania
• Kaunas University of Applied Sciences, Pramonės 20, LT-50468, Kaunas, Lithuania

author

L. Marcinauskas

• Lithuanian Energy Institute, Breslaujos 3, LT-4440, Kaunas, Lithuania
• Kaunas University of Technology, Studentu 50, LT-51368, Kaunas, Lithuania

author

P. Valatkevicius

• Lithuanian Energy Institute, Breslaujos 3, LT-4440, Kaunas, Lithuania

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Identifiers

DOI

10.12693/APhysPolA.120.66