One-step synthesis of branched sulfur/polypyrrole nanocomposite cathode for lithium rechargeable batteries

Yongguang Zhang, Zhumabay Bakenov, Yan Zhao, Aishuak Konarov, The Nam Long Doan, Muhammad Malik, Todd Paron, P. Chen

Research output: Contribution to journalArticle

109 Citations (Scopus)

Abstract

A nanostructured sulfur/polypyrrole binary composite was prepared by a simple one-step ballmilling without heat-treatment. High resolution transmission and scanning electronic microscopy showed the formation of a highly developed branched structure consisting of polypyrrole with uniform sulfur coating on its surface. Exclusion of heat-treatment in the composite preparation avoided the sulfur loss; the composite contained 65 wt% of sulfur. AC impedance spectroscopy data exhibited remarkable reduction in charge transfer resistance of the composite compared with pristine sulfur. This may be due to the high conductivity and large surface area of polypyrrole. This charge transfer enhancement led to the electrochemical performance improvement of the composite cathode, delivering first discharge capacity of 1320 mAh g -1.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalJournal of Power Sources
Volume208
DOIs
Publication statusPublished - Jun 15 2012

Keywords

  • Conducting sulfur composite
  • Lithium-sulfur battery
  • Sulfur cathode for lithium batteries
  • Sulfur/polypyrrole composite

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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