Issue 11, 2015

Dumbbell-like Au-Fe3O4 nanoparticles: a new nanostructure for supercapacitors

Abstract

Monodispersed dumbbell-like Au-Fe3O4 nanoparticles (NPs) were synthesized and studied for use in supercapacitors. These dumbbell NPs show Au/Fe3O4-size dependent capacitive behaviors and the 7–14 nm Au-Fe3O4 NPs have the best specific capacitance of 464 F g−1 at 1 A g−1 and capacity retention of 86.4% after 1000 cycles, much larger than pure Fe3O4 NPs (160 F g−1 and 72.8% retention). This capacitive enhancement is believed to arise from the Au-induced increase in electron transfer across the dumbbell-like NPs. Thise report demonstrates a new strategy to enhance oxide NP capacitance for applications in high performance supercapacitors.

Graphical abstract: Dumbbell-like Au-Fe3O4 nanoparticles: a new nanostructure for supercapacitors

Supplementary files

Article information

Article type
Communication
Submitted
08 Jan 2015
Accepted
06 Feb 2015
First published
10 Feb 2015

Nanoscale, 2015,7, 4890-4893

Author version available

Dumbbell-like Au-Fe3O4 nanoparticles: a new nanostructure for supercapacitors

S. Liu, S. Guo, S. Sun and X. You, Nanoscale, 2015, 7, 4890 DOI: 10.1039/C5NR00135H

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