Employing of Trukhan Model to Estimate Ion Transport Parameters in PVA Based Solid Polymer Electrolyte.

Aziz Aziz,Hamsan Hamsan,B Marif B Marif,Brza Brza,Kadir Kadir

doi:10.3390/polym11101694

Abstract

In the current paper, ion transport parameters in poly (vinyl alcohol) (PVA) based solid polymer electrolyte were examined using Trukhan model successfully. The desired amount of lithium trifluoromethanesulfonate (LiCF3SO3) was dissolved in PVA host polymer to synthesis of solid polymer electrolytes (SPEs). Ion transport parameters such as mobility (μ), diffusion coefficient (D), and charge carrier number density (n) are investigated in detail using impedance spectroscopy. The data results from impedance plots illustrated a decrement of bulk resistance with an increase in temperature. Using electrical equivalent circuits (EEC), electrical impedance plots (ZivsZr) are fitted at various temperatures. The results of impedance study demonstrated that the resistivity of the sample decreases with increasing temperature. The decrease of resistance or impedance with increasing temperature distinguished from Bode plots. The dielectric constant and dielectric loss values increased with an increase in temperature. The loss tangent peaks shifted to higher frequency region and the intensity increased with an increase in temperature. In this contribution, ion transport as a complicated subject in polymer physics is studied. The conductivity versus reciprocal of temperature was found to obey Arrhenius behavior type. The ion transport mechanism is discussed from the tanδ spectra. The ion transport parameters at ambient temperature are found to be 9 × 10−8 cm2/s, 0.8 × 1017 cm−3, and 3 × 10−6 cm2/Vs for D, n, andμ respectively. All these parameters have shown increasing as temperature increased. The electric modulus parameters are studied in an attempt to understand the relaxation dynamics and to clarify the relaxation process and ion dynamics relationship.

Highlights

Human life and earth planet have been threatened by current types of energy forms, so that researchers required thinking about a promising alternative which can be seen in electrical energy form [1]
Trukhan model has been verified as a promising method for study diffusion coefficient, charge carrier number density and mobility in PVA:LiCF3SO3 solid polymer electrolytes (SPEs)
Peaks in loss tangent spectra were used in the calculations

Summary

Introduction

Human life and earth planet have been threatened by current types of energy forms, so that researchers required thinking about a promising alternative which can be seen in electrical energy form [1] In this regard, lithium-ion batteries are considered as one of popular source of electrical energy sources. Relatively low ionic conductivity is one of the obvious drawbacks of PEO based polymer electrolytes [5]. Another example of polymer host of interest to many researcher groups is poly (vinyl alcohol) (PVA) [6,7]. Dealing with the ionic conductivity of polymer electrolytes is absolutely impressive because of structure dependent characters, thereby, one can alter the structure of the material which in turn appropriate for specific task applications in an attempt to improve both chemical and physical properties [12,13]

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Results

Conclusion