Issue 2, 2013

Facile synthesis of ultrafine CoSn2nanocrystals anchored on graphene by one-pot route and the improved electrochemical Li-storage properties

Abstract

In this work, we succeeded in the synthesis of a CoSn2-nanocrystals/graphene-nanosheets (CoSn2/G) hybrid by a facile in situ one-pot solvothermal route. X-ray diffraction, X-ray photoelectron spectroscopy and Raman spectra results revealed the formation of CoSn2 and the reduction of graphite oxide (GO) to graphene during the one-pot process. Transmission electron microscopy observation indicated that the spherical CoSn2 nanocrystals, with a uniform size of 2–4 nm, are anchored on graphene. The electrochemical tests showed that the CoSn2/G hybrid exhibits obviously improved electrochemical properties compared to the bare Co–Sn alloy prepared by a similar route in the absence of GO, even though the content of graphene is only 7.2 wt%. The enhancement in the electrochemical properties could be attributed to the introduction of graphene that not only constructs two-dimensional conductive networks but also disperses and confines the CoSn2 nanocrystals, in addition to the buffering effect for the large volume changes.

Graphical abstract: Facile synthesis of ultrafine CoSn2 nanocrystals anchored on graphene by one-pot route and the improved electrochemical Li-storage properties

Article information

Article type
Paper
Submitted
07 Oct 2012
Accepted
12 Nov 2012
First published
13 Nov 2012

New J. Chem., 2013,37, 474-480

Facile synthesis of ultrafine CoSn2 nanocrystals anchored on graphene by one-pot route and the improved electrochemical Li-storage properties

B. Feng, J. Xie, G. Cao, T. Zhu and X. Zhao, New J. Chem., 2013, 37, 474 DOI: 10.1039/C2NJ40894E

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