Quaternary Polymer Electrolytes Containing an Ionic Liquid and a Ceramic Filler

Macromol Rapid Commun. 2016 Jul;37(14):1188-93. doi: 10.1002/marc.201600025. Epub 2016 Mar 22.

Abstract

In this work, the individual and combined effects of an ionic liquid 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide and ceramic filler silicon dioxide on the thermal and electrochemical properties of poly(ethylene oxide) electrolytes have been investigated. The electrolyte containing both components has the lowest glass transition (-60 °C) and melting temperatures (27 °C), the highest conductivity at any investigated temperature, and the highest limiting current density (at 40 °C). This solid polymer electrolyte also exhibits the best long-term cycling performance in Li/LiFePO4 cells.

Keywords: ceramic fillers; electrochemistry; ionic liquids; lithium polymer batteries; polyethers.

MeSH terms

  • Electric Conductivity
  • Electrochemical Techniques
  • Electrolytes / chemistry
  • Ionic Liquids / chemistry*
  • Polyethylene Glycols / chemistry*
  • Silicon Dioxide / chemistry*
  • Temperature

Substances

  • Electrolytes
  • Ionic Liquids
  • Polyethylene Glycols
  • Silicon Dioxide