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Journal of Solid State Electrochemistry

, Volume 17, Issue 11, pp 2959–2965 | Cite as

Synthesis and electrochemical performance of TiO2–sulfur composite cathode materials for lithium–sulfur batteries

  • Qiang Li
  • Zhian Zhang
  • Kai Zhang
  • Lei Xu
  • Jing Fang
  • Yanqing Lai
  • Jie Li
Original Paper

Abstract

Titania–sulfur (TiO2–S) composite cathode materials were synthesized for lithium–sulfur batteries. The composites were characterized and examined by X-ray diffraction, nitrogen adsorption/desorption measurements, scanning electron microscopy, and electrochemical methods, such as cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic charge–discharge tests. It is found that the mesoporous TiO2 and sulfur particles are uniformly distributed in the composite after a melt-diffusion process. When evaluating the electrochemical properties of as-prepared TiO2–S composite as cathode materials in lithium–sulfur batteries, it exhibits much improved cyclical stability and high rate performance. The results showed that an initial discharge specific capacity of 1,460 mAh/g at 0.2 C and capacity retention ratio of 46.6 % over 100 cycles of composite cathode, which are higher than that of pristine sulfur. The improvements of electrochemical performances were due to the good dispersion of sulfur in the pores of TiO2 particles and the excellent adsorbing effect on polysulfides of TiO2.

Keywords

Lithium–sulfur batteries Mesoporous TiO2 TiO2–sulfur composite Polysulfides 

Notes

Acknowledgments

The authors thank the financial support of the Strategic Emerging Industries Program of Shenzhen, China (JCYJ20120618164543322) and the Science and technology project of Hunan Province (2011FJ3151). We also thank the support of the Engineering Research Center of Advanced Battery Materials, the Ministry of Education, China.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Qiang Li
    • 1
  • Zhian Zhang
    • 1
    • 2
  • Kai Zhang
    • 1
  • Lei Xu
    • 1
  • Jing Fang
    • 1
  • Yanqing Lai
    • 1
    • 2
  • Jie Li
    • 1
    • 2
  1. 1.School of Metallurgy and EnvironmentCentral South UniversityChangshaChina
  2. 2.Engineering Research Center of High Performance Battery Materials and DevicesResearch Institute of Central South University in ShenzhenShenzhenChina

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