Effect of polymer blending on the electrochemical properties of porous PVDF/PMMA membrane immobilized with organic solvent based liquid electrolyte
Author:
Harshlata 1, Mishra Kuldeep2, Rai Devendra K.1ORCID
Affiliation:
1. Department of Physics and Materials Science and Engineering , Jaypee Institute of Information Technology , Noida , India 2. Department of Physics and Materials Science , Jaypee University Anoopshahr , Bulandshahr , India
Abstract
Abstract
In this paper, experimental studies on blend gel polymer electrolyte membranes comprising of poly(vinylidene fluoride) (PVDF) and poly(methyl methacrylate) (PMMA) saturated with 0.1 M liquid electrolyte of sodium tetrafluoroborate (NaBF4) in the mixture of ethylene carbonate (EC) and diethyl carbonate (DEC) are presented. Membranes are prepared by phase inversion technique. The effect of blending on the ionic conductivity, electrochemical stability window, ionic transference number, and cation transport number has been investigated using complex impedance spectroscopy, linear sweep voltammetry and DC polarization technique. Ion dynamics in the electrolyte membranes has also been investigated using dielectric studies. The optimized electrolyte membrane with composition PVDF:PMMA (95:5) + 0.1 M NaBF4 + EC + DEC shows highest ionic conductivity of 0.6 mS cm−1 which follows Vogel–Tamman–Fulcher (VTF) behavior with temperature. The membrane shows an electrochemical stability window of 3.5 V and sodium ion transport number as ∼0.33.
Publisher
Walter de Gruyter GmbH
Subject
Materials Chemistry,Metals and Alloys,Physical and Theoretical Chemistry,Condensed Matter Physics
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