J Mater Sci Technol ›› 2008, Vol. 24 ›› Issue (04): 657-660.

• Research Articles • Previous Articles     Next Articles

Mesoporous Carbon-Tin Nanocomposites as Anode Materials for Li-ion Battery

Z.W.Zhao, Z.P.Guo, P.Yao, H.K.Liu   

  1. Institute for Superconducting and Electronic Materials, University of Wollongong, NSW 2522, Australia...
  • Received:2007-12-11 Revised:2008-06-06 Online:2008-07-28 Published:2009-10-10
  • Contact: H.K.Liu

Abstract: A new mesoporous carbon-tin (MC-Sn) nanocomposite has been successfully prepared via a two-step method. From the transmission electron microscopy (TEM) observations, the tin nanoparticles were decorated on the as-prepared mesoporous carbons. The mesoprous structure of the carbon can effectively buffer the volume changes during the Li-Sn alloying and de-alloying cycles. The as-prepared MC/Sn nanocomposite electrodes exhibited extremely good cycling stability, with the specific capacity of Sn in the composite electrode calculated to be 959.7 mAh•g-1, which amounts to an impressive 96.9% of the theoretical value (990 mAh•g-1). The reversible capacity after 200 cycles is 96.1% of the first cycle reversible capacity, i.e., the capacity fade rate is only 0.0195% per cycle, which is even better than that of commercial graphite-based anodes.

Key words: Mesoporous Carbon, Tin, Nanocomposites, Lithium ion battery