Polymer electrolytes are solid solutions of alkali metal salts
(typically lithium salts) in polymer hosts such as poly(ethylene
oxide), (PEO). In recent years, they have been extensively explored,
mostly because of their potential importance as solid polymer
electrolytes (SPEs) in rechargeable batteries and other
electrochemical devices. They are considered very promising
combining high energy density, enhanced mechanical strength and
durability, ease of processing and safety.
We study the physical properties of neat PEO
melts and PEO-melt/LiClO4 electrolytes using experimental
techniques such as static and dynamic light scattering (photon correlation spectroscopy
and Brillouin spectroscopy), rhreometry,
viscometry and DSC analysis. The most current project is a study of the structural
relaxation and local segmental dynamics in the polymer electrolyte using
Brillouin light scattering technique.