Characterization of solvent-free polymer electrolytes consisting of ternary PEO-LiTFSI-PYR

Joon-Ho Shin, Wesley A. Henderson, Cosimo Tizzani, Stefano Passerini, Sang-Sik Jeong, Ki-Won Kim

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The physical properties and electrochemical performance of solvent-free polymer electrolytes, consisting of poly(ethylene oxide) [P(EO)] with Li+and N-butyl-W-methylpyrrolidinium (PYR14+) salts of bis(trifluoromethanesulfonyl)imide (TFSI), arc reported. The addition of the PYR14TFST room-temperature molten salt to the conventional P(EO)10LiTFST polymer electrolyte results in a significant enhancement of the ionic conductivity (to 2.6 × 10-4S/cm at 20°C). Li metal/LiFePO4batteries making use of this new family of solid polymer electrolytes have shown a very promising low-temperature cycle life. It was found that a Li metal/LiFePO4cell at 20°C can deliver 138 mAh/g during the first discharge, corresponding to 90% of the nominal specific capacity (154 mAh/g), and a promisingly low capacity fading of about 0.2%/cyele over 500 cycles. © 2006 The Electrochemical Society. All rights reserved.
Original languageEnglish
Pages (from-to)-
JournalJournal of the Electrochemical Society
Issue number9
Publication statusPublished - 2006
Externally publishedYes


All Science Journal Classification (ASJC) codes

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

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