Journal of Electronic Materials | 2021
PEO/PMMA Solid Nanocomposite Polyelectrolyte with Enhanced Ionic Conductivity and Promising Dielectric Properties
Abstract
Solid nanocomposite polyelectrolytes (SNPs) composed of PEO/PMMA blend as the host polymer matrix, LiCF3SO3 as the electrolyte salt and barium titanate as nanofiller has been developed. The microstructural analysis using FTIR confirms the interaction between BaTiO3 nanoparticles and PEO/PMMA/LiCF3SO3 matrix. XRD and DSC analysis of the solid nanocomposite polyelectrolytes exhibit a substantial reduction in the crystallinity of the host polymers. The dielectric studies reveal the enhancement of the dielectric constant of the nanocomposite polyelectrolytes. Prominent improvement in the ionic conductivity has been achieved with the incorporation of BaTiO3. Both dielectric constant and ionic conductivity showed the highest values at 3 wt% of BaTiO3. A significant increase in the ionic conductivity and dielectric constant is attributed to the BaTiO3 assisted dissociation of LiCF3SO3 resulting in the enhanced conductivity of lithium cations with the incorporation of BaTiO3 to the host polymer. An ambient temperature ionic conductivity of 1.25×10−4 S cm−1 was reached, which suggests the promising application of the developed solid nanocomposite polyelectrolyte in flexible electronics.