Dielectric Modulus and Conductivity Scaling Approach to the Analysis of Ion Transport in Solid Polymer Electrolytes

Namrata Tripathi; Archana Shukla; Awalendra K. Thakur; David T. Marx

doi:10.1002/pen.25283

journal article Nov 06, 2019

Dielectric Modulus and Conductivity Scaling Approach to the Analysis of Ion Transport in Solid Polymer Electrolytes

Namrata Tripathi

Archana Shukla Awalendra K. Thakur David T. Marx

Polymer Engineering & Science Vol. 60 No. 2 pp. 297-305 · Wiley

View at Publisher Save 10.1002/pen.25283

Abstract

Solid polymer electrolyte films (SPEs) based on poly(methyl methacrylate) are prepared using a solution cast technique. The temperature‐dependent behavior of dielectric, modulus spectra and ac conductivity has been investigated. The long tail of the real part of modulus (M′) in the low frequency indicates the capacitive nature of the samples. The frequency dependence of imaginary part of modulus (M″) shows a non‐Debye relaxation that has been explained using the Kohlrausch–Williams–Watts stretched exponential function. The activation energy for the relaxation is almost same as the activation energy for the conduction. The relaxation time obtained from the tangent loss graph (τδ) is about two orders of magnitude larger than that obtained from the imaginary part of modulus graph (τm). The ac conductivity has been found to obey Jonscher's universal power law. Transport parameters show that addition of filler creates additional hopping sites for the charge carriers and also increases the charge carrier density. It is also observed that the higher ionic conductivity at higher temperature is due to increased thermally activated hopping rates accompanied by a significant increase in carrier concentration. The contribution of carrier concentration to the total conductivity is also confirmed from Summerfield scaling. POLYM. ENG. SCI., 60: 297–305, 2019. © 2019 Society of Plastics Engineers

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Details

Published: Nov 06, 2019
Vol/Issue: 60(2)
Pages: 297-305
License: View

Authors

N

Namrata Tripathi

Department of Physics Illinois State University Normal Illinois 61790

A

Archana Shukla

Department of Metallurgical Engineering & Materials Science Indian Institute of Technology Bombay Mumbai Maharashtra 400076 India

A

Awalendra K. Thakur

Department of Physics Indian Institute of Technology Patna Patna Bihar 800013 India

D

David T. Marx

Department of Physics Illinois State University Normal Illinois 61790

Cite This Article

Namrata Tripathi, Archana Shukla, Awalendra K. Thakur, et al. (2019). Dielectric Modulus and Conductivity Scaling Approach to the Analysis of Ion Transport in Solid Polymer Electrolytes. Polymer Engineering & Science, 60(2), 297-305. https://doi.org/10.1002/pen.25283

Dielectric Modulus and Conductivity Scaling Approach to the Analysis of Ion Transport in Solid Polymer Electrolytes

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