One-pot approach to synthesize PPy@S core-shell nanocomposite cathode for Li/S batteries

Yongguang Zhang, Yan Zhao, Aishuak Konarov, Denise Gosselink, Zhi Li, Mahmoudreza Ghaznavi, P. Chen

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

A polypyrrole-coated sulfur composite (PPy@S) was synthesized by in situ polymerization of pyrrole monomers on the surface of nano-sulfur particles. High resolution transmission electron microscopy and energy dispersive spectroscopy mapping showed the formation of a highly developed core-shell structure with uniform PPy coating on the surface of sulfur particles. The electrochemical properties of the resulting PPy@S composite cathode have been evaluated by cyclic voltammograms and galvanostatic discharge-charge cycling. The results show that the PPy@S composite exhibits a reversible capacity of 1,200 mAh g -1 at the initial cycle, with 913 mAh g-1 remaining after 50 cycles. Even up to 2.5 C, a reversible capacity of 437 mAh g-1 is obtained. The excellent electrochemical performance can be attributed to the conductive PPy-coating nanolayer, which provides both an effective electron conduction path and a strong physical and chemical confinement setting for elemental sulfur and resident polysulfides, minimizing the loss of active material during cycling.

Original languageEnglish
Article number2007
JournalJournal of Nanoparticle Research
Volume15
Issue number10
DOIs
Publication statusPublished - Nov 11 2013

Keywords

  • Core-shell structure
  • Energy storage
  • Lithium/sulfur battery
  • Nanostructured sulfur cathode
  • Sulfur/polypyrrole composite

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Modelling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'One-pot approach to synthesize PPy@S core-shell nanocomposite cathode for Li/S batteries'. Together they form a unique fingerprint.

  • Cite this