Synthesis and Electrochemical Properties of Y-Doped SnO₂/C Composite Materials for Lithium-Ion Battery

Abstract:

The layered Y-doped SnO₂/C anode materials were prepared by a co-precipitation method. The physical properties of the Y-doped SnO₂/C were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and electrochemical measurements. XRD studies showed that the Y-doped SnO₂/C has the same layered structure as the undoped SnO₂/C. The SEM images exhibited that the particle size of Y-doped SnO₂/C is smaller than that of the undoped SnO₂/C and the smallest particle size is only about 1µm. The Y-doped SnO₂/C samples were investigated on the Lithium extraction/insertion performances by charge/discharge, cyclic voltammograms (CV), and electrochemical impedance spectra (EIS). The results showed that the optimal doping content of Y was that x=0.07 and 2% content of carbon nanotubes samples to achieve high discharge capacity and good cyclic stability. The electrode reaction reversibility and electronic conductivity were enhanced, and the charge transfer resistance was decreased through Y-doping.

• Periodical: Advanced Materials Research (Volumes 197-198)
• Pages: 1157-1162
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.197-198.1157
• Online since: February 2011
• Authors: Sheng Kui Zhong, You Wang, Chang Jiu Liu, Yan Wei Li, Yan Hong Li
• Keywords: Carbon Nanotube (CN), Cyclic Voltammogram (CV), Lithium-Ion Battery, SnO₂/C, Y-Doping

References

[1] I.A. Courtney, J. R, Dahn: J. Electrochem. Soc. 144 (6) (1997)(2045).

[2] Nam S C, Paik C H, Cho B W, et al: J Power source, 1999, 84: 24-31.

[3] Kim H J, Jeong T J: J Electrochem. Soc. 2003, 150(11): A1544-A1547.

[4] M. Park, G. Wang, Y. Kang, et al: Chem. Int. Ed. 46 (2007)750.

[5] Gao X P, Bao J L, Pan G L, et al: Journal of Physical. Chemistry B, 2004, 108: 5547-5551.

[6] Tamura N, Ohshita R, Fujimoto M, et al: J Power Sources, 2002, 107(1): 48-55.

[7] H. Mukaibo, t Sumi, T. Yokoshima, t Momma, T Osaka: Electrochemical and Solid-State Letters, 2003, 6 (10): A218-A220.

DOI: 10.1149/1.1602331

[8] Tamuraz N, Kato Y, Mikami A: J Electro-chem. Soc, 2006, 153 (8) : 1626-1632.

[9] Fan X Y, Ke F S, Wei G Z, et al: J Alloys and Compounds, 2009, 476: 70-73.