Structural, Electrical Properties and Dielectric Relaxation in Na+ Ion Conducting Solid Polymer Electrolyte

TL;DR

This study investigates the structural, electrical, and dielectric properties of Na+ ion conducting solid polymer electrolytes, revealing how SN content influences ion dynamics and conductivity through various characterization techniques.

Contribution

It provides new insights into the ion dynamics and dielectric relaxation behavior of sodium-based polymer electrolytes with SN additive, supported by a comprehensive analysis of their microstructure and electrical properties.

Findings

Dielectric relaxation peaks shift to higher frequency with SN content.

Ionic conductivity strongly depends on SN content across frequency range.

Relaxation times decrease, indicating faster ion dynamics with SN addition.

Abstract

Present paper reports, the structural, microstructural, electrical, dielectric properties and ion dynamics of a sodium based solid polymer electrolyte films comprising of PEO8-NaPF6+ x wt. % SN. The structural and surface morphology properties have been investigated by XRD and FESEM. Different microscopic interaction among the polymer, salt and SN have been analyzed through FTIR. The dielectric permittivity and loss tangent enable us to estimate the dc conductivity, dielectric strength, double layer capacitance, and relaxation time. The loss tangent relaxation peak shifts towards high-frequency side which indicates the decrease of relaxation time and faster ion dynamics. Further, the relation among various relaxation times ...... has been developed systematically. The ionic conductivity has been estimated in whole frequency window including JPL and displays strong dependency on SN content. The sigma representation ........ has been introduced for exploring the ion dynamics by highlighting the dispersion region in Cole-Cole plot (........) at lower frequency window and increase in the radius of semicircle indicates a decrease of relaxation time. A well convincing/logical scheme has been proposed which justify the recorded experimental data.