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Dendrite-like carbon nanotube-confined polymeric sulfur as cathode materials for lithium–sulfur battery

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2020, 30(5), pp.521-526
  • DOI : 10.1007/s42823-020-00121-5
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : November 12, 2019
  • Accepted : January 20, 2020
  • Published : October 1, 2020

Li Xiaoyu 1 Zhang Zhehao 1 Zou Youlan 1 Li Zhaoyang 1 Duan Jinliang 1 Long Bo 1

1Xiangtan University

Accredited

ABSTRACT

We reported the synthesis of dendrite-like carbon nanotube-confned polymeric sulfur composite by modifying the surface of carbon nanotubes (CNTs) with trithiocyanuric acid (TTCA) and then copolymerizing with sulfur. DSC results show the successfully formation of robust chemical bonds between sulfur and TTCA modifed CNTs, which efectively avoid the dis-solution of polysulfde when used as cathodes for lithium–sulfur batteries. The composite with a high sulfur content of 78 wt% exhibits an initial charge capacity of 698 mAh g−1 and the residual capacity of 553 mAh g−1 after 1000 cycles at a rate of 1 C.

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