A Free-Standing Sulfur/Nitrogen-Doped Carbon Nanotube Electrode for High-Performance Lithium/Sulfur Batteries

نویسندگان

  • Yan Zhao
  • Fuxing Yin
  • Yongguang Zhang
  • Chengwei Zhang
  • Almagul Mentbayeva
  • Nurzhan Umirov
  • Hongxian Xie
  • Zhumabay Bakenov
چکیده

A free-standing sulfur/nitrogen-doped carbon nanotube (S/N-CNT) composite prepared via a simple solution method was first studied as a cathode material for lithium/sulfur batteries. By taking advantage of the self-weaving behavior of N-CNT, binders and current collectors are rendered unnecessary in the cathode, thereby simplifying its manufacturing and increasing the sulfur weight ratio in the electrode. Transmission electronic microscopy showed the formation of a highly developed core-shell tubular structure consisting of S/N-CNT composite with uniform sulfur coating on the surface of N-CNT. As a core in the composite, the N-CNT with N functionalization provides a highly conductive and mechanically flexible framework, enhancing the electronic conductivity and consequently the rate capability of the material.

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عنوان ژورنال:

دوره 10  شماره 

صفحات  -

تاریخ انتشار 2015