Development of ion conducting ionic liquid-based gel polymer electrolyte membrane PMMA/BMPyr.TFSI - With improved electrical, optical, thermal and structural properties

Ionogel membranes are materials of colossal intrigue worldwide because of their utilization as excellent substitutes of the liquid electrolytes or as separators in ionic gadgets including batteries, fuel cells, supercapacitors, energy units, and so on. In the present work, transparent ionogel composites of PMMA/1-butyl-1-methylpyrrolidinium bis(trifluoromethyl sulfonyl imide) (100/0, 90/10, 80/20, 70/30) were prepared to be used for optical devices. The impact of varying amount of ionic liquid in the PMMA matrix in weight ratios was compared with the undoped polymer blend. The prepared membrane was characterized for thermal, conductivity, optical and for morphological examinations. In addition, the current voltage characteristics of prepared films have been performed at room temperature. The addition of ionic liquid to the polymer matrix improves the properties by having better thermal stability, enhanced luminescence intensity and making the membrane more amorphous. Among these, PMMA with 20% having a glass transition temperature of 44.95 °C exhibits superior performance with the fairly smooth transparent surface, increased flexibility, enhanced thermal stability, highest ionic conductivity, the maximum capacitance of 0.403 ∗ 10− 6Fcm− 2, non ohmic behaviour and photoluminescence property.