TITLE:
Studies on AC Electrical Conductivity and Dielectric Properties of PVA/NH4NO3 Solid Polymer Electrolyte Films
AUTHORS:
Alabur Manjunath, Tegginakeri Deepa, Naraganahalli Karibasappa Supreetha, Mohammed Irfan
KEYWORDS:
Polymer Electrolytes, XRD, FTIR, Electrical Conductivity
JOURNAL NAME:
Advances in Materials Physics and Chemistry,
Vol.5 No.8,
August
5,
2015
ABSTRACT: Solid
polymer electrolytes have been extensively studied due to wide applications in
various electrochemical devices [1]-[3]. Most of the solid polymer electrolytes consist
of polymer as a host material to provide strength and good mechanical stability
and an inorganic salt that supplies ionic carriers to cause electrical
conductivity. In our studies, we prepared PVA/NH4NO3 polymer electrolyte films by solution casting method. The prepared films with
varied Ammonium Nitrate concentration from 0 - 20 wt% are characterized by XRD
& FTIR spectroscopy. XRD results show that amorphous nature increases as
the amount of the Ammonium Nitrate salt in PVA is increased. IR-spectra confirm
the polymer salt complexes in the range of 3700 - 712 cm﹣1.
Conductance analysis reveals that polymer electrolyte films containing 20 wt%
of NH4NO3 exhibit the highest ionic conductivity of 1.01
× 10﹣7 S/cm while pure PVA films give the lowest ionic conductivity
of 2.10 × 10﹣11 S/cm. It was evident from this study that the
increase of ionic conductivity depended on the Ammonium Nitrate salt
concentration. The dielectric constant exponentially decreases with increase of
frequency for pure PVA and NH4NO3 doped PVA film composites.
The temperature dependent studies of AC conductivity and dielectric constant
also included to understand the conducting property. The results obtained by
these studies are reported in this work.