A simple approach to synthesize nanosized sulfur/graphene oxide materials for high-performance lithium/sulfur batteries

Yongguang Zhang, Yan Zhao, Zhumabay Bakenov

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

We report on a simple and facile synthesis route for the sulfur/graphene oxide composite via ultrasonic mixing of the nano-sulfur and graphene oxide aqueous suspensions followed by a low-temperature heat treatment. High-resolution transmission and scanning electronic microscopy observations revealed the formation of a highly porous structure consisting of sulfur with uniform graphene oxide coating on its surface. The resulting sulfur/graphene oxide (S/GO) composite exhibited high and stable specific discharge capacities of 591 mAh g-1 after 100 cycles at 0.1 C and good rate capability. This enhanced electrochemical performance could be attributed to the effective confining the polysulfides dissolution and accommodation of the volume changes during the Li-S electrochemical reaction by the functional groups on the graphene oxide coating layer. Furthermore, the highly developed porous structure of S/GO composite favors the enhanced ion transport and electrolyte diffusion.

Original languageEnglish
Pages (from-to)1047-1050
Number of pages4
JournalIonics
Volume20
Issue number7
DOIs
Publication statusPublished - Jul 2014

Keywords

  • Graphene oxide
  • Lithium/sulfur battery
  • Nanostructured sulfur cathode
  • Porous structure

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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