Preparation and characterization of composite electrodes of coconut-shell-based activated carbon and hydrous ruthenium oxide for supercapacitors

Dandekar, Mukta S. ; Arabale, Girish ; Vijayamohanan, K. (2005) Preparation and characterization of composite electrodes of coconut-shell-based activated carbon and hydrous ruthenium oxide for supercapacitors Journal of Power Sources, 141 (1). pp. 198-203. ISSN 0378-7753

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.jpowsour.2004.09.008

Abstract

The relationship between the structure-specific capacitance (F g-1) of a composite electrode consisting of activated coconut-shell carbon and hydrous ruthenium oxide (RuOx(OH)y) has been evaluated by impregnating various amounts of RuOx(OH)y into activated carbon that is specially prepared with optimum pore-size distribution. The composite electrode shows an enhanced specific capacitance of 250 F g-1 in 1 M H2SO4 with 9 wt.% ruthenium incorporated. Chemical and structural characterization of the composites reveals a homogeneous distribution of amorphous RuOx(OH)y throughout the porous network of the activated carbon. Electrochemical characterization indicates an almost linear dependence of capacitance on the amount of ruthenium owing to its pseudocapacitive nature.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Activated Carbon; Composite; Supercapacitor; Specific Capacitance; Pseudocapacitance; Electrochemical Characterization
ID Code:68917
Deposited On:08 Nov 2011 04:40
Last Modified:08 Nov 2011 04:40

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