Free Volume Controlled Ionic Conductivity in Poly Vinyl Alcohol/Zinc Acetate Solid Polymer Electrolytes

Valsan, E. Kavya and John, Anju and Raghavendra, M. and Ravikumar, H. B. (2020) Free Volume Controlled Ionic Conductivity in Poly Vinyl Alcohol/Zinc Acetate Solid Polymer Electrolytes. Journal of The Electrochemical Society, 167 (6). ISSN 1945-7111

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Official URL: https://iopscience.iop.org/article/10.1149/1945-71...

Abstract

Poly vinyl alcohol (PVA)/Zinc acetate (ZnAc) Solid Polymer Electrolytes (SPEs) of different ZnAc weight percentage (5%, 10%, 15%, 20%) were prepared. Positron Lifetime Spectroscopy (PLS) studies reveal the increased fractional free volume (F,) from 1.93% to 2.16% for 20 wt% of ZnAc loading. The increased ionic conductivity of PVA/ZnAc SPEs for 20 wt% of ZnAc loading suggests the increased concentration of Zn2+ cations and acetate anions. The ionic conductivity of PVA/ZnAc SPEs increases at higher frequencies of the applied electric field due to the increased polarization of dipoles. The increased ionic conductivity of PVA/ZnAc SPEs with increased fractional free volume suggests that the mobility of Zn2+ and acetate ions is favored by the amorphous phase of the SPEs. The XRD results justify the increased amorphousness of PVA/ZnAc SPEs. FTIR studies confirm the formation of polymer salt complexes due to chemical bonding between C-H group of PVA and carbonyl group of (C=O) of ZnAc salt. (C) 2020 The Electrochemical Society (''ECS''). Published on behalf of ECS by IOP Publishing Limited.

Item Type: Article
Subjects: D Physical Science > Physics
Divisions: Department of > Physics
Depositing User: Mr Umendra uom
Date Deposited: 18 Feb 2021 06:31
Last Modified: 18 Feb 2021 06:31
URI: http://eprints.uni-mysore.ac.in/id/eprint/15597

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