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Nmr Studies of Polymer Electrolytes

Published online by Cambridge University Press:  28 February 2011

S.G. Greenbaum
Affiliation:
Hunter College of CUNY, Department of Physics, New York, NY 10021Weizmann Institute of Science, Department of Chemical Physics, Rehovot, Israel
Y.S. Pak
Affiliation:
Hunter College of CUNY, Department of Physics, New York, NY 10021
K.J. Adamic
Affiliation:
Hunter College of CUNY, Department of Physics, New York, NY 10021
M.C. Wintersgill
Affiliation:
U.S. Naval Academy, Department of Physics, Annapolis, MD 21402
J.J. Fontanella
Affiliation:
U.S. Naval Academy, Department of Physics, Annapolis, MD 21402
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Abstract

The results of several investigations of solvent-free polymer electrolytes by nuclear magnetic resonance (NMR) spectroscopy conducted by the authors and other groups are reviewed. 23Na NMR spectra of a wide variety of amorphous polymer electrolytes are characteristic of the second-order quadrupole broadened central ± 1/2 transition with a distribution of quadrupole couplings. The temperature dependence of the linewidth is similar across a wide range of materials, and highlights the importance of polymer segmental motions above the glass transition temperature to ion mobility. Strong cation-anion interactions in poly(propylene oxide) complexes are indicated by measurements of mobile ion concentrations and, in some cases, the observation of salt precipitation at elevated temperature.

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Type
Research Article
Copyright
Copyright © Materials Research Society 1991

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