Ionic Conductivity of PVC-NH₄I-EC Proton Conducting Polymer Electrolytes

Abstract

Poly(vinyl) chloride (PVC)-NH4I-EC films have been prepared by solution cast technique. The sample containing 30 wt. % NH4I exhibited highest room temperature conductivity of 4.60 × 10-7S cm-1. The conductivity increased to 1.08 × 10-6Scm-1when 15 wt. % of ethylene carbonate (EC) was added to 70 wt. % PVC - 30 wt. % NH4I. Fourier Transform Infrared (FTIR) showed evidence of polymer–salt complexation while DSC showed increase in glass transition temperature (Tg) of PVC -NH4I - EC polymer electrolytes. The conductivity behavior of the studied system could be accounted by the changes in Tgvalues.

Characterisation of Polymer Electrolytes Based on High Molecular Weight PVC and BMIMCF₃SO₃

“…Nevertheless, it is remarkable to note that at nearly 60 o C, the conductivity was significantly increased for both polymer electrolytes. This remarkable change in conductivity is correlated with the glass temperature T of PVC, which is measured to be about 60 o C as discussed in previous studies [6,7]. Previous studies have shown that ionic conductivity is closely related to T g [1,6].…”

“…This remarkable change in conductivity is correlated with the glass temperature T of PVC, which is measured to be about 60 o C as discussed in previous studies [6,7]. Previous studies have shown that ionic conductivity is closely related to T g [1,6]. Preceding to this change, polymer electrolytes are in a glassy state, where the polymer segments have limited movement and ions are stimulated using hopping mechanism [1].…”

Properties of PEMA-NH4CF3SO3 Added to BMATSFI Ionic Liquid

“…In such systems, the charge carriers are H + ions that come from ammonium ions of the salts. The conduction of the H + ions occurs through exchange of H + ions between complexed sites [3,4]. In the present study, proton conducting polymer electrolytes were prepared using PEMA as the host.…”

Ionic Conductivity via Quantum Mechanical Tunneling in NH₄NO₃ Doped Carboxymethyl Cellulose Solid Biopolymer Electrolytes

“…Four well-known theoretical hopping/tunneling models typically used to determine the conduction mechanism in polymer electrolyte systems are correlated barrier hopping (CBH) [11,12], small polaron hopping (SPH) [13], quantum mechanical tunneling (QMT) [14,15], and overlapping large polaron tunneling (OLPT) [16][17][18] models. These theories were based on the Universal Power Law or also known as Universal Dielectric Response as originally proposed by Jonscher in 1977 to understand ion dynamics.…”