Synthesis and Lithium Storage Performance of Sn-Co/C Composite Anode Materials for Li-Ion Battery

Abstract:

The Sn-Co/C composites as novel anode materials for lithium-ion batteries were prepared by solid-state sintering. The influences of carbon black content in Sn-Co/C composite on material structures and the electrochemical properties were investigated. Structure analyses show that carbon black mainly is physically mixed with CoSn phase and could inhibit the growth of grain of CoSn phase, avoid the formation of large particles and increase the specific surface area obviously. Electrochemical analyses show that the refinement of grain size or particle size could contribute to improve the discharge capacity and cycle performance, but the increasing of specific surface area could reduce the charge-discharge efficiency. When carbon black content is 6 wt.%, the discharge capacity reach its maximum, which is 275 mAh/g, the initial charge-discharge efficiency is 52.8% and the retention of discharge capacity is 72.8% after 30 cycles.

• Periodical: Advanced Materials Research (Volumes 299-300)
• Pages: 516-519
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.299-300.516
• Online since: July 2011
• Authors: Shao Bin Yang, Ding Shen, Xiao Guang Wu
• Keywords: Carbon Black (CB), Lithium-Ion Battery, Sn-Co

References

[1] A.D.W. Todd, R. E. Mar and J.R. Dahn: J. Electrochem. Soc. Vol. 154 (2007), p.597.

[2] D. Shen, S.B. Yang and F. Yang: Chin. J. Power Sources Vol. 134 (2010), p.371.

[3] Z. Liang and S.B. Yang: J. Mater. Sci. Technol. Vol. 26 (2010), p.653.

[4] H. Guo, S. Zhao and H.L. Zhao, et al: Electrochim. Acta. Vol. 54 (2009), p.4040.

[5] S.B. Yang, D. Shen and Q, Li: Acta. Metall. Sin. Vol. 46 (2010), p.6.

[6] J.J. Zhang and Y.Y. Xia: J. Electrochem. Soc. Vol. 153 (2006), p.1466.