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Size Controlled Nickel Oxide Nanoparticles on Carbon Nanotubes for Supercapacitor Electrode

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Abstract:

We have synthesized supercapacitor electrodes fashioned of NiO x /multiwalled carbon nanotubes (MWNTs), in which the controlled NiO x nanoparticles were prepared via a simple colloidal method and supported on the MWNTs. The sizes of the NiO x nanoparticles on MWNTs were systematically varied from 4to 14nm at a fixed metal loading of 20 wt% by changing sintering temperature in a controlled manner. The maximum specific capacitance of the NiO x /MWNTs was measured to be ca. 215 F per unit gram of NiO x /MWNTs by cyclic voltammetry (CV) in an aqueous 1 M KOH electrolyte, demonstrating that the specific capacitance of the MWNTs-supported nanosize NiO x is strongly dependent on the dispersion and size of the nanoparticles for the supercapacitor performance.

Keywords: CARBON NANOTUBES; COLLOIDAL METHOD; NANOPARTICLE SIZE; NICKEL OXIDE; SUPERCAPACITOR

Document Type: Research Article

DOI: https://doi.org/10.1166/jnn.2008.1096

Publication date: 2008-10-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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