title: Size controlled nickel oxide nanoparticles on carbon nanotubes for supercapacitor electrode.
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 4 to 14 nm 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.
authors.affiliation: Department of Materials Science and Engineering and Program for Integrated Molecular Systems (PIMS), Gwangju Institute of Science and Technology (GIST), 261 Cheomdan-gwagiro, Gwangju 500-712, South Korea.
authors.forename: Sang Hoon
authors.initials: SH
authors.lastname: Nam
authors.forename: Youn-Su
authors.initials: YS
authors.lastname: Kim
authors.forename: Hee-Sang
authors.initials: HS
authors.lastname: Shim
authors.forename: Sung Mook
authors.initials: SM
authors.lastname: Choi
authors.forename: Hae Jin
authors.initials: HJ
authors.lastname: Kim
authors.forename: Won Bae
authors.initials: WB
authors.lastname: Kim