Issue 9, 2012

α-Fe2O3nanotubes-reduced graphene oxide composites as synergistic electrochemical capacitor materials

Abstract

We present a facile approach for the fabrication of a nanocomposite comprising α-Fe2O3 nanotubes (NTs) anchored on reduced graphene oxide (rGO) for electrochemical capacitors (ECs). The hollow tubular structure of the α-Fe2O3 NTs presents a high surface area for reaction, while the incorporation of rGO provides an efficient two-dimensional conductive pathway to allow fast, reversible redox reaction. As a result, the nanocomposite materials exhibit a specific capacitance which is remarkably higher (∼7 times) than α-Fe2O3 NTs alone. In addition, the nanocomposites show excellent cycling life and large negative potential window. These findings suggest that such nanocomposites are a promising candidate as negative electrodes in asymmetrical capacitors with neutral electrolytes.

Graphical abstract: α-Fe2O3 nanotubes-reduced graphene oxide composites as synergistic electrochemical capacitor materials

Supplementary files

Article information

Article type
Paper
Submitted
03 Dec 2011
Accepted
21 Feb 2012
First published
27 Feb 2012

Nanoscale, 2012,4, 2958-2961

α-Fe2O3 nanotubes-reduced graphene oxide composites as synergistic electrochemical capacitor materials

K. K. Lee, S. Deng, H. M. Fan, S. Mhaisalkar, H. R. Tan, E. S. Tok, K. P. Loh, W. S. Chin and C. H. Sow, Nanoscale, 2012, 4, 2958 DOI: 10.1039/C2NR11902A

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