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International Journal of Electrochemistry
Volume 2011, Article ID 381960, 8 pages
Research Article

Influence of the C/Sn Ratio on the Synthesis and Lithium Electrochemical Insertion of Tin-Supported Graphite Materials Used as Anodes for Li-Ion Batteries

1Laboratoire de Chimie du Solide Minéral, Nancy-University, CNRS, BP 239, 54506 Vandoeuvre-les-Nancy Cedex, France
2Laboratoire Réactions et Génie des Procédés (LRGP), UPR 3349, Nancy-University, CNRS, 1 rue Grandville, 54001 Nancy Cedex, France
3Centre National d'Etudes Spatiales (CNES), 18 Avenue E. Belin, 31055 Toulouse Cedex, France

Received 21 January 2011; Accepted 25 February 2011

Academic Editor: S. Gopukumar

Copyright © 2011 Cédric Mercier et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Novel composites consisting of tin particles associated to graphite were prepared by chemical reduction of tin(+2) chloride by -BuONa-activated sodium hydride in the presence of graphite. The samples obtained using various C/Sn ratios were investigated by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and elemental analyses. The largest tin particles associated to graphite layers were observed for the material with a C/Sn ratio of 16. For the materials with C/Sn ratios of 42 and 24, SEM and TEM experiments demonstrated that Sn aggregates of ca. 250 nm length and composed of Sn particles with an average diameter of ca. 50 nm were homogeneously distributed at the surface of graphite. Electrodes prepared from the material exhibit a high reversible capacity of over 470 mAh up to twenty cycles with stable cyclic performances.