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Electrosynthesised Metal (Ni, Fe, Co) Oxide Films on Single-Walled Carbon Nanotube Platforms and Their Supercapacitance in Acidic and Neutral pH Media

Authors

  • Abolanle S. Adekunle,

    1. Department of Chemistry, University of Pretoria, Pretoria 0002, South Africa
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  • Kenneth I. Ozoemena

    Corresponding author
    1. Department of Chemistry, University of Pretoria, Pretoria 0002, South Africa
    2. Energy and Processes Unit, Materials Science and Manufacturing, Council for Scientific and Industrial Research (CSIR), Pretoria 0001, South Africa tel.: +27128413664; fax: +27128412135
    • Department of Chemistry, University of Pretoria, Pretoria 0002, South Africa
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Abstract

Supercapacitive properties of Single-walled carbon nanotubes/metal oxides nanocomposites (SWCNT-MO where M=Ni, Fe, Co) have been described. The SWCNT-MO nanocomposites was confirmed with SEM, EDX and XPS techniques. Supercapacitive properties of the modified electrodes in H2SO4 and Na2SO4 electrolytes was investigated using cyclic voltammetry (CV), galvanostatic constant current charge-discharge (CD) and the electrochemical impedance spectroscopy (EIS) techniques. SWCNT-NiO nanocomposite modified electrodes gave better supercapacitive performance with a specific capacitance of 186 mF cm−2 (or 928 F g−1). This value compared quite favourably and even higher than values hitherto reported in several literature.

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