The effect of composition nanofiller Al2O3 to the conductivity, morphology and thermal properties of MG30-LiTf polymer electrolyte

Composite polymer electrolytes (CPEs) film was prepared using 30% PMMA grafted natural rubber (MG30), lithium triflate (LiTf) and Aluminum Oxide (Al₂O₃). The conductivity of these polymer electrolytes was studied by AC impedance spectroscopy. The highest value was achieved up to ~10-6 S/cm at 8 wt.% of Al₂O₃ in MG30-LiTf system. The increase in conductivity is associated to the increase of the segmental chain flexibility of the composited film indeed increases of the amorphous domain and was confirmed by X-ray diffraction (XRD) spectra studies. Surface morphological analysis showed the sample with highest conductivity exhibited most homogenous in nature with reduces the glass transition temperature (Tg). The composited polymer electrolyte was found more stable at higher temperature compared to uncomposite samples.