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Electrochemical behavior of carbon-nanotube/cobalt oxyhydroxide nanoflake multilayer films |
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| Authors: | Huajun Zheng Fengqiu Tang Thomas Rufford Lianzhou Wang |
| Affiliation: | a Zhijiang College, Zhejiang University of Technology, Hangzhou 310024, PR China b State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, PR China c ARC Centre of Excellence for Functional Nanomaterials, School of Engineering and AIBN, The University of Queensland, St Lucia, Brisbane, QLD 4072, Australia |
| Abstract: | 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 voltammograms 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 F g−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. |
| Keywords: | Multilayer film Carbon nanotube CoOOH nanoflake Electrostatic self-assembly Electrodeposition Electrochemical capacitance |
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