Dielectric Response of Strontium Titanate (SrTiO3)/Polycarbonate Nanocomposite Electrodes for Energy Storage

Abstract

In the present study we are reporting dielectric response of strontium titanate (SrTiO3 represented as ST used as filler in 1–5 mwt%)/polycarbonate (PC) nanocomposites of thickness 100 μm synthesized by solution cast method. Polycarbonate serving as passive matrix element and ceramic strontium titanate (SrTiO3) dispersed into polycarbonate to improve effective dielectric response. X-ray diffraction (XRD), Fourier transform infrared (FT-IR) and Scanning electron microscopy (SEM) have been used to investigate structural, bonding and morphological properties of fabricated nanocomposites respectively. Particular attention has been given on the examination of dielectric response for composites using Impedance analyzer. Dielectric constant has been found to be increased with increasing concentration of SrTiO3 inside the polycarbonate matrix. The observed dielectric constant reaches upto 6.61 for ST5%PC95% composite at 1 KHz. These composites of high dielectric constant can be used as high performance electrode materials for electrical energy storage devices.