Issue 19, 2015

Hybrid nanostructured C-dot decorated Fe3O4 electrode materials for superior electrochemical energy storage performance

Abstract

Research on energy storage devices has created a niche owing to the ever increasing demand for alternative energy production and its efficient utilisation. Here, a novel composite of Fe3O4 nanospheres and carbon quantum dots (C-dots) have been synthesized by a two step chemical route. Hybrids of C-dots with metal oxides can contribute to charge storage capacity through the combined effect of Faradaic pseudocapacitance from the Fe3O4 and the excellent electrical properties of the C-dots, which are a promising new member of the carbon family. The structural and morphological properties of the obtained Fe3O4-C hybrid nanocomposite were extensively studied. Detailed electrochemical studies show that the high performance of the magnetically responsive Fe3O4-C hybrid nanocomposite makes it an efficient supercapacitor electrode material. The remarkable improvement in the electrochemical performance of the Fe3O4-C hybrid nanocomposite is attributed to the Faradaic pseudocapacitance of Fe3O4 coupled with the high electrical conductivity of the C-dot which aided in fast transport and ionic motion during the charge–discharge cycles. Cyclic voltammetry and galvanostatic charge–discharge studies of Fe3O4-C hybrid nanocomposite show that the nanosystem delivers a maximum specific capacitance of ∼208 F g−1. These results demonstrate that the novel Fe3O4-C hybrid nanocomposite has great potential as a high performance electrode material for supercapacitors.

Graphical abstract: Hybrid nanostructured C-dot decorated Fe3O4 electrode materials for superior electrochemical energy storage performance

Article information

Article type
Paper
Submitted
21 Jan 2015
Accepted
26 Mar 2015
First published
27 Mar 2015

Dalton Trans., 2015,44, 9221-9229

Hybrid nanostructured C-dot decorated Fe3O4 electrode materials for superior electrochemical energy storage performance

K. Bhattacharya and P. Deb, Dalton Trans., 2015, 44, 9221 DOI: 10.1039/C5DT00296F

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