Journal
ELECTROCHIMICA ACTA
Volume 56, Issue 3, Pages 1629-1635Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2010.10.043
Keywords
MWNTs; Graphene; PANI; Electrochemical performance
Categories
Funding
- IT Industrial Source Technology Development Business of the Ministry of Knowledge Economy, Korea
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In this work, multi-walled carbon nanotube (MWNT) bonded graphene(M-GR)composites were prepared using the chemical reduction of graphite oxide (GO) and acid treated MWNTs with different ratios. The M-GR/polyaniline (PANI) nanocomposites (M-GR/PANI) were prepared using oxidation polymerization. The effect of the M-GR ratio on the electrochemical performances of the M-GR/PANI was investigated. It was found that the substrate 2D graphene was coated with 1D MWNTs by chemical reduction and the M-GR was further coated with PANI, leading to increased electrical properties by the pi-pi interaction between the M-GR and PAK In addition, the electrochemical performances, such as the current density, charge-discharge, and specific capacitance of the M-GR/PANI were higher than those of graphene/PANI and the highest specific capacitance (1118 F/g) of the composites was obtained at a scan rate of 0.1 A/g for the PANI containing a 0.5 M-GR ratio compared to 191 F/g for the graphene/PANI. The dispersion of the MWNTs onto the graphene surface and the ratio of M-GR had a pronounced effect on the electrochemical performance of the PANI-based composites, which was attributed to the highly conductive pathway created by the M-GR incorporated in the PANI-based composites and the synergistic effect between M-GR and PANI. (C) 2010 Elsevier Ltd. All rights reserved.
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