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Title: Nanoarchitectured current collector for high rate capability of polyaniline based supercapacitor electrode
Authors: Sumboja, Afriyanti
Wang, Xu
Yan, Jian
Lee, Pooi See
Issue Date: 2012
Source: Sumboja, A., Wang, X., Yan, J., & Lee, P. S. (2012). Nanoarchitectured current collector for high rate capability of polyaniline based supercapacitor electrode. Electrochimica Acta, 65, 190-195.
Series/Report no.: Electrochimica acta
Abstract: Indium tin oxide (ITO) nanowires array was used as current collector and building block for polyaniline based supercapacitor. Thin polyaniline coating was deposited on the nanowires and resulted in the formation of polyaniline ITO coaxial nanowires. This hybrid heterostructure design improved the specific capacitance, rate capability, and cycling stability of the supercapacitor electrode. Good conductivity harnessed by these directly grown ITO nanowires is useful to improve the charge transport during the charge discharge processes which were confirmed by the electrochemical impedance spectroscopy measurement. Electrochemical test in 1 M H2SO4 at 4 A g−1 delivered specific capacitance as high as 738 F g−1. In addition, sub-micron size of the intercoaxial nanowires spacing ensures the fast penetration of electrolyte ions which resulted in the superior rate capability (98% capacitance retention when applied current was varied from 4 to 25 A g−1). The capacitance retention is significantly higher as compared to other polyaniline composite electrodes and it is one of the best reported performances to date for polyaniline based supercapacitor electrodes. This work illustrates a promising platform that can be adopted for other redox nanocomposite materials while reaping the benefit as low cost and binder free electrode material for supercapacitor application.
ISSN: 0013-4686
DOI: 10.1016/j.electacta.2012.01.046
Rights: © 2012 Elsevier Ltd.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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