High performance flexible solid-state asymmetric supercapacitors from MnO2/ZnO core-shell nanorods//specially reduced graphene oxide

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

203 Scopus Citations
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Original languageEnglish
Pages (from-to)1331-1336
Journal / PublicationJournal of Materials Chemistry C
Volume2
Issue number7
Online published2 Sep 2013
Publication statusPublished - 21 Feb 2014
Externally publishedYes

Abstract

With a view to developing flexible solid-state asymmetric supercapacitors, we have specially designed and nanoscopically engineered two types of electrodes: a MnO2/ZnO core-shell nanorod array and a HI-reduced graphene oxide assembly, both deposited in situ on a carbon cloth. These materials were thoroughly characterized by structural and spectroscopic techniques. The flexible solid-state asymmetric supercapacitors with cathodes and anodes made of these materials have demonstrated superior performance characteristics. They can be cycled in a wide potential window of 0-1.8 V for 5000 cycles with only 1.5% capacitance loss. The demonstrated volumetric energy density of 0.234 mW h cm-3 and volumetric power density of 0.133 W cm-3 are much higher than those of similar devices reported previously in the literature. 

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