Vibrational Spectroscopic Determination of Structure and Ion Pairing in Complexes of Polyethylene oxide) with Lithium Salts

B. L. Papke, M. A. Rotner, D. F. Shriver

Research output: Contribution to journalArticlepeer-review

220 Scopus citations

Abstract

A structural model for crystalline complexes of poly(ethylene oxide) (PEO) with various lithium salts is presented, based on vibrational spectroscopic studies; these complexes are known to exhibit ionic conductivities of > 10−5 (Ω-cm)−1 at 100°C. Cation-dependent vibrational bands observed in the Raman indicate that significant cation-oxygen atom interactions occur and suggest that the polyether chain may wrap around the lithium cations. Spectroscopic studies indicate extensive contact ion pairing occurs in the PEO LiNO3 complex, and this may contribute to the somewhat lower ionic conductivity of this complex as compared to other lithium salt complexes with similar structures but weaker cation-anion interactions.

Original languageEnglish (US)
Pages (from-to)1434-1438
Number of pages5
JournalJournal of the Electrochemical Society
Volume129
Issue number7
DOIs
StatePublished - Jul 1982

Keywords

  • Raman spectra
  • infrared spectra
  • ionic conductivity
  • polymer electrolytes
  • solid electrolytes

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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