NMR (Na Nuclear Magnetic Resonance) Studies of Na+-Anion Association Effects in Polymer Electrolytes

Abstract

23Na nuclear magnetic resonance (NMR) measurements on poly(propylene oxide) (PPO) and siloxane based polymer electrolytes containing various sodium salts at a single nominal concentration are reported. In addition, differential scanning calorimetry (DSC) and electrical conductivity studies were carried out on the PPO materials. The NMR-determined mobile Na+ concentrations and DSC results provide evidence for ionic aggregation effects which, for some samples, result in salt precipitation at elevated temperatures. 23Na chemical shifts observed in solid state NMR due to mobile Na+ ions are obtainable without the use of high resolution techniques, and exhibit strong dependences on anion and temperature. These results indicate the Na+-anion interactions influence ionic transport as well as the number of available carriers.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Aug 23, 1988
Accession Number
ADA199455

Entities

People

  • J. J. Fontanella
  • M. C. Wintersgill
  • S. G. Greenbaum
  • Y.s. Pak

Organizations

  • Hunter College

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption
  • Absorption Spectra
  • Chemical Shifts
  • Conductivity
  • Electrical Conductivity
  • Ethylene Oxide
  • Glass Transition Temperature
  • High Temperature
  • Magnetic Resonance
  • Materials
  • Military Research
  • New York
  • Nuclear Magnetic Resonance
  • Polymers
  • Resonance
  • Spectra
  • Transition Temperature

Fields of Study

  • Materials science

Readers

  • Aviation Safety and Air Traffic Management
  • Fluid Dynamics.
  • Polymer Science and Technology