Journal
JOURNAL OF POWER SOURCES
Volume 193, Issue 2, Pages 930-934Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2009.03.005
Keywords
Multilayer film; Carbon nanotube; CoOOH nanoflake; Electrostatic self-assembly; Electrodeposition; Electrochemical capacitance
Funding
- Zhejiang Natural Science Foundation [Y4080042]
- Australian Research Council's Centre of Excellence Program
- China Scholarship Council (CSC)
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A new type of multilayer films consisting of multi-walled carbon nanotubes (MWCNTs) and cobalt oxyhydroxide nanoflakes (CoOOHNFs) are developed by alternately electrostatic self-assembly and electrodeposition technique, respectively. The successful growth of multilayer films composed of MWCNT and CoOOHNF are confirmed by scanning electron microscopy and X-ray photoelectron spectra. The multilayer film electrode is investigated for use in a supercapacitor with cyclic voltammograrns and galvanostatic charge-discharge experiments. Experimental studies reveal that coatings of MWCNT/CoOOHNF on ITO glass present excellent electrochemical capacitance with specific capacitance being 389 Fg(-1). The overall improved electrochemical behavior is accounted for the unique structure design in the multilayer films in terms of effective micro-porous nanostructure, large specific surface-area and good electrical conductance. (C) 2009 Elsevier B.V. All rights reserved.
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