Conduction Properties of Poly(ethylene oxide) Electrolytes with Lithium Salts at Terahertz Frequencies

We study the conduction properties of solid-state polymer electrolytes based on cross-linked poly(ethylene oxide) with lithium salts, using terahertz time-domain spectroscopy at room temperature. The obtained terahertz conductivity spectra of the electrolytes and the associated ionic and molecular dynamics are found to be sensitive to the type and concentration of the added salt.