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Polymer electrolyte membrane based on Polyethylene oxide/1-Butyl-3-methylimidazolium hydrogen sulfate (PEO-BMImHSO4) is prepared. The highest room temperature ionic conductivity of the membrane is obtained as ~ 4.27 × 10 -5 Scm -1 . Ion dynamics is studied using dielectric measurements which reveal translational motion of the ions in the prepared polymer electrolyte. The loss tangent (tan į) reflects faster ion hoping in the electrolyte but at higher concentration of IL, hoping rate receives tapering.

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