Muthuvinayagam
Kalasalingam University, India
Title: A new approach to prepare ion conducting polymer blend electrolytes
Biography
Biography: Muthuvinayagam
Abstract
Enhancing the properties of polymer electrolytes are very important to improve the performance of energy storage devices like batteries, super- capacitors, sensors, dye-sensitized solar cells and fuel cells. Solid polymer blend electrolytes are prepared by using three different biodegradable polymers PVA,PVP and PEG. PVA:PVP:PEG(40:40:20Mwt%) system is found to the optimized one based on their amorphous nature. Alongwith the optimized ratio, different Mwt% of Sodium nitrate are doped and polymer electrolytes are prepared by solution casting method. The prepared polymer electrolytes are investigated by X-Ray Diffraction, Scanning Electron Microscope and and Ac impedance technique. The XRD analysis reveals the increase in amorphous nature during the addition of NaNO3 with optimized polymer blend. The scanning electron microscope images show the blurred nature of polymer surface that leads for improving ionic conductivity. At room temperature, the maximum ionic conductivity is 1.03x10-6 S/cm for 10Mwt% of NaNO3 doped system with PVA:PVP:PEG(40:40:20Mwt%). The ionic conductivity increases with increase in temperature due to the increase of free volume or segmental motion in polymer electrolytes. The dielectric properties of the electrolytes are also analyzed. The ionic and electronic transference number are measured by Wagner polarization technique