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Selenium/carbon-rich core-shell composites as cathode materials for rechargeable lithium-selenium batteries

Journal Article


Abstract


  • Selenium/carbon-rich (Se/carbon-rich) core-shell composites are prepared by a one-step hydrothermal synthesis method as a cathode for rechargeable lithium batteries. The Se/carbon-rich composites are characterized and examined by X-ray diffraction (XRD), field emission scanning electron microscopy (SEM), transmission electron microscopy (TEM), and thermogravimetry (TGA) measurements. It is demonstrated from galvanostatic discharge/charge process that the Se/carbon-rich composites exhibit the discharge capacity of 558 mA h g-1 in the first cycle and maintain capacity of 181 mA h g-1 after 80 cycles at a rate of 0.5C, which is better than that of the pristine selenium. The result demonstrates that the unique core-shell structure is effective in suppressing the dissolution of polyselenides into the electrolyte and in maintaining high utilization of the active materials during the charge/discharge process. It provides a new selenium-based cathode material for rechargeable lithium batteries.

Authors


  •   Zhang, Zhian (external author)
  •   Yang, Xing (external author)
  •   Guo, Zaiping
  •   Qu, Yaohui (external author)
  •   Li, Jie (external author)
  •   Lai, Yanqing (external author)

Publication Date


  • 2015

Citation


  • Zhang, Z., Yang, X., Guo, Z., Qu, Y., Li, J. & Lai, Y. (2015). Selenium/carbon-rich core-shell composites as cathode materials for rechargeable lithium-selenium batteries. Journal of Power Sources, 279 88-93.

Scopus Eid


  • 2-s2.0-84920743690

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3967

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 88

End Page


  • 93

Volume


  • 279

Place Of Publication


  • Netherlands

Abstract


  • Selenium/carbon-rich (Se/carbon-rich) core-shell composites are prepared by a one-step hydrothermal synthesis method as a cathode for rechargeable lithium batteries. The Se/carbon-rich composites are characterized and examined by X-ray diffraction (XRD), field emission scanning electron microscopy (SEM), transmission electron microscopy (TEM), and thermogravimetry (TGA) measurements. It is demonstrated from galvanostatic discharge/charge process that the Se/carbon-rich composites exhibit the discharge capacity of 558 mA h g-1 in the first cycle and maintain capacity of 181 mA h g-1 after 80 cycles at a rate of 0.5C, which is better than that of the pristine selenium. The result demonstrates that the unique core-shell structure is effective in suppressing the dissolution of polyselenides into the electrolyte and in maintaining high utilization of the active materials during the charge/discharge process. It provides a new selenium-based cathode material for rechargeable lithium batteries.

Authors


  •   Zhang, Zhian (external author)
  •   Yang, Xing (external author)
  •   Guo, Zaiping
  •   Qu, Yaohui (external author)
  •   Li, Jie (external author)
  •   Lai, Yanqing (external author)

Publication Date


  • 2015

Citation


  • Zhang, Z., Yang, X., Guo, Z., Qu, Y., Li, J. & Lai, Y. (2015). Selenium/carbon-rich core-shell composites as cathode materials for rechargeable lithium-selenium batteries. Journal of Power Sources, 279 88-93.

Scopus Eid


  • 2-s2.0-84920743690

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3967

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 88

End Page


  • 93

Volume


  • 279

Place Of Publication


  • Netherlands