en Research Paper Research Paper <span style="font-size:11pt"><span style="line-height:107%"><span style="font-family:Calibri,sans-serif"><span new="" roman="" style="font-family:" times="">The composite solid polymer electrolyte films were prepared by doping nano-sized Fe₂O₃particles on PVB (Polyvinyl Butyral) complexed with NaNO₃ salt by solution casting technique. FTIR, XRD, and SEM methods characterized these electrolyte films. The Fourier Transform Infrared Spectroscopy and X-ray diffraction methods reveal the structural and complexation changes occurring in the electrolytes. The surface morphology of the electrolyte film was examined using the SEM (Scanning Electron Microscope) technique.</span> <span new="" roman="" style="font-family:" times="">The PVB+NaNO₃+Fe₂O₃(70:30:3%) electrolyte shows a moderate ionic conductivity of 2.51&times;10^&minus;5 S cm^&minus;1 at ambient temperature (303 K). AC impedance spectroscopic analysis evaluates the ionic conductivity of the produced polymer electrolyte. Wagner&#39;s polarisation technique was applied to study the charge transport characteristics in the electrolyte films. The investigation revealed that ions constituted the majority of the transport carriers. An Open Circuit Voltage (OCV) of 2.0V and a Short Circuit Current (SCC) of 0.8 mA were found in the discharge characteristics data for the cell constructed with the polymer electrolyte sample.</span></span></span></span><br> <br> &nbsp; Polymer electrolytes,X-ray diffraction,Ionic conductivity,Discharge characteristics,Optical properties 1 10 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-5407-1&slc_lang=en&sid=1 Umadevi Prasanna umadevi.tunga@gmail.com 1800319475328460019754 1800319475328460019754 No Dayananda Sagar University Vijaya Kumar Kambila drkambilavk@gmail.com 1800319475328460019755 1800319475328460019755 Yes Dayananda Sagar University Krishna Jyothi Nadella jyothinadella82@gmail.com 1800319475328460019756 1800319475328460019756 No Satya Sai University of Human Excellence