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Issue 37, 2015
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Supercapacitors based on patronite–reduced graphene oxide hybrids: experimental and theoretical insights

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Abstract

Here we report the hydrothermal synthesis and detailed study on supercapacitor applications of a patronite hybrid, VS4/reduced graphene oxide, which showed an enhanced specific capacitance of ∼877 F g−1 at a current density of 0.5 A g−1. In comparison to bare vanadium sulfide and reduced graphene oxide, the hybrid showed ∼6 times and ∼5 times higher value of specific capacitance, respectively. The obtained energy density (117 W h kg−1) and power density (20.65 kW kg−1) are comparable to those of other reported transition metal sulfides and their graphene hybrids. Theoretical calculations using density functional theory confirm an enhanced quantum capacitance of VS4/graphene composite systems, owing primarily to the shifting of the graphene Dirac cone relative to the band gap of VS4. The results infer that the hybrid has the potential to be used as a high performance supercapacitor electrode.

Graphical abstract: Supercapacitors based on patronite–reduced graphene oxide hybrids: experimental and theoretical insights

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Supplementary files

Article information


Submitted
02 May 2015
Accepted
10 Jul 2015
First published
10 Jul 2015

J. Mater. Chem. A, 2015,3, 18874-18881
Article type
Paper
Author version available

Supercapacitors based on patronite–reduced graphene oxide hybrids: experimental and theoretical insights

S. Ratha, S. R. Marri, N. A. Lanzillo, S. Moshkalev, S. K. Nayak, J. N. Behera and C. S. Rout, J. Mater. Chem. A, 2015, 3, 18874
DOI: 10.1039/C5TA03221K

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