Three-dimensional hierarchical porous structure of PPy/porous-graphene to encapsulate polysulfides for lithium/sulfur batteries

Yongguang Zhang, Zhumabay Bakenov, Taizhe Tan, Jin Huang

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Herein, we demonstrate the fabrication of a three-dimensional (3D) polypyrrole-coatedporous graphene (PPy/PG) composite through in-situ polymerization of pyrrole monomer on PG surface. The PPy/PG displays a 3D hierarchical porous structure and the resulting PPy/PG hybrid serves as a conductive trap to lithium polysulfides enhancing the electrochemical performances. Owing to the superior conductivity and peculiar structure, a high initial discharge capacity of 1020 mAh g-1 and the reversible capacity of 802 mAh g-1 over 200 cycles are obtained for the S/PPy/PG cathode at 0.1 C, remaining the remarkable cyclic stability. In addition, the S/PPy/PG cathodes demonstrate an excellent rate performance exhibiting 477 mAh g-1 at 2 C.

Original languageEnglish
Article number606
JournalNanomaterials
Volume8
Issue number8
DOIs
Publication statusPublished - Aug 9 2018

Keywords

  • Hierarchical 3D porous structure
  • Lithium/sulfur battery
  • Sulfur/polypyrrole/porous graphene composite

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)

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