Fabrication and characterization of an effective polymer nanocomposite electrolyte membrane for high performance lithium/sulfur batteries

Kazem Jeddi, Yan Zhao, Yongguang Zhang, Aishuak Konarov, P. Chen

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

One of the major drawbacks of lithium/sulfur (Li/S) batteries is the dissolution of polysulfides into liquid electrolytes. In order to overcome this difficulty, polymer/silicate nanocomposite electrolytes composed of polyvinylidene fluoride-co-hexafluoropropylene (PVdF-HFP) and different types of nano-layered silicates were fabricated and analyzed. All the electrolyte membranes showed ionic conductivity of 5-7 mS/cm at room temperature and electrochemical stability window up to 4.8 V. Tested by two different sulfur composite cathodes, PVdF-HFP/organically-modified-silicate (OMMT) nanocomposite electrolyte delivered a higher discharge capacity and showed an improved cyclability compared to the other cells. Such electrochemical performance is attributed to the small and uniformly distributed pores within the structure of the polymer nanocomposite membrane, which promotes immobilizing the electrolyte solution and prevents dissolution of polysulfides.

Original languageEnglish
Pages (from-to)A1052-A1060
JournalJournal of the Electrochemical Society
Volume160
Issue number8
DOIs
Publication statusPublished - May 10 2013

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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