Exerted influence of deep eutectic solvent concentration in the room temperature ionic conductivity and thermal behavior of corn starch based polymer electrolytes

► Incorporation of DES plasticizing biodegradable polymer electrolyte (corn starch). ► CS:LiTFSI:DES exhibits ionic conductivity of 4.56 × 10− 3 S cm− 1 at 50 °C. ► The heat-resistivity of polymer electrolyte diminishes with the addition of DES.