Well-dispersed sulfur anchored on interconnected polypyrrole nanofiber network as high performance cathode for lithium-sulfur batteries

Fuxing Yin, Xinyi Liu, Yongguang Zhang, Yan Zhao, Almagul Menbayeva, Zhumabay Bakenov, Xin Wang

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)

Abstract

Preparation of novel sulfur/polypyrrole (S/PPy) composite consisting well-dispersed sulfur particles anchored on interconnected PPy nanowire network was demonstrated. In such hybrid structure, the as-prepared PPy clearly displays a three-dimensionally cross-linked and hierarchical porous structure, which was utilized in the composite cathode as a conductive network trapping soluble polysulfide intermediates and enhancing the overall electrochemical performance of the system. Benefiting from this unique structure, the S/PPy composite demonstrated excellent cycling stability, resulting in a discharge capacity of 931 mAh g−1 at the second cycle and retained about 54% of this value over 100 cycles at 0.1 C. Furthermore, the S/PPy composite cathode exhibits a good rate capability with a discharge capacity of 584 mAh g−1 at 1  C.

Original languageEnglish
Pages (from-to)44-49
Number of pages6
JournalSolid State Sciences
Volume66
DOIs
Publication statusPublished - Apr 1 2017

Keywords

  • Lithium/sulfur battery
  • Nanostructured sulfur cathode
  • PPy nanowire network
  • S/PPy composite

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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