Electrochemical and Thermal Properties of PEO-LITFSI based Gel Polymer Electrolytes with the Effect of Plasticizer and Filler for Lithium-sulfur Batteries

Electrochemical properties and interracial stability of poly (ethylene oxide) (PEO) / lithium (bis) trifluoro-methane-sulfonate imide (LITFSI) with the incorporation of plasticizers (TEGDME & DIOX) and filler (SiO2) based composite gel polymer electrolytes prepared by the simple solution casting technique has been studied. The addition of plasticizers and filler with polymer electrolytes enhances the ionic conductivity at low temperature. The interfacial stability, transport properties and thermal stability were remarkably improved by the addition of SiO2 and plasticizers into the polymer-salt complex matrix. The sample with 2% of plasticizers was found to be optimal in ionic conductivity point of view.