Poly(ethylene oxide) LiN(SO

C. Capiglia, N. Imanishi, Y. Takeda, W.A. Henderson, S. Passerini

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The present report describes a Raman spectroscopy investigation of polymer electrolytes based on poly(ethylene oxide) (PEO)-lithium bis(perfluoroethylsulfonyl)imide (LiBETI), LiN(SO2CF2CF3)2. A wide range of ether oxygen/salt, EO/LiBETI, molar ratios extending from 2 to 50 was considered. The crystalline salt was also investigated and a preliminary assignment of the Raman peaks of the salt, pure and dissolved in PEO, is made. The analysis of the Raman spectra supports the suggested formation of a solvent-separated P(EO)6(or7)-LiBETI crystalline solvate. The highest conductivities of polymer electrolytes reported in previous works were for those electrolytes having compositions close to this solve stoichiometry. The appearance of broad vibrational bands associated with amorphous PEO, even in very salt-diluted samples, confirms the ability of the BETI- anion to strongly affect the polymer morphology.
Original languageEnglish
Pages (from-to)-
JournalJournal of the Electrochemical Society
Issue number4
Publication statusPublished - Apr 2003
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
  • Materials Chemistry
  • Electrochemistry

Cite this

Capiglia, C., Imanishi, N., Takeda, Y., Henderson, W. A., & Passerini, S. (2003). Poly(ethylene oxide) LiN(SO. Journal of the Electrochemical Society, 150(4), -. https://doi.org/10.1149/1.1557963