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Study of Polymer Electrolyte Dynamics by Impulsive Stimulated Light Scattering

Published online by Cambridge University Press:  28 February 2011

I.C. Halalay ,
G-A. Nazri  and
K.A. Nelson
I.C. Halalay
Affiliation:
Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139 and General Motors Research Laboratories, Warren, MI 48090
G-A. Nazri
Affiliation:
General Motors Research Laboratories, Warren, MI 48090
K.A. Nelson
Affiliation:
Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139
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Abstract

The polymer electrolyte PEO:LiBF4 at concentrations 2:1, 4:1, 8:1, 16:1 and pure PEO (in methanol as solvent) was studied in the temperature range 220–340 K using impulsive stimulated light scattering, a time-delayed four-wave mixing (‘transient grating’) technique. We observed longitudinal acoustic waves (the transient density response) and thermal diffusion (leading to the decay of the steady-state density response). The speed of sound and acoustic attenuation rate were determined in the frequency range 57 MHz - 1.4 GHz. From the decay of the steady state response the thermal diffusivities were detremined.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 210: Symposium L – Solid State Ionics II , 1990 , 255
Copyright
Copyright © Materials Research Society 1991

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