Tailoring the Structural, Morphological, Electrochemical, and Dielectric Properties of Solid Polymer Electrolyte

Abstract

Abstract:Herein, we present preparation of solid polymer electrolyte (SPE) comprising of PEO, NaPF6 and varying fraction of Succinonitrile (SN) by standard solution cast technique. The morphological features and structural properties were studied by the FESEM, XRD, respectively. FTIR was performed to study the interactions between polymer host, salt, and SN. Impedance spectroscopy, Transference number measurements, LSV and CV were used to examine the electrochemical properties. The complex permittivity/conductivity & modulus were studied to understand the dielectric properties by evaluating the dielectric strength, relaxation time, hopping frequency and dc conductivity. Based on the experimental results an interaction mechanism is presented.

Impact of polymer blending on ionic conduction mechanism and dielectric properties of sodium based PEO-PVdF solid polymer electrolyte systems

“…5(a) shows the variation of electrical conductivity with the frequency of various prepared samples at room temperature. From the figure, it can be observed that PPN-80 sample has the highest conductivity.In general, the frequency-dependent conductivity could exhibit three types of dispersion regions with frequency, (i) low-frequency region, which demonstrates the space charge polarization, (ii) dc saturation zone in midfrequency region and (iii) dc-to-ac switching at high frequency-zone, which is due to the coulombic interaction of charge carrier and disruption within the framework [31,32]. The change in conductivity with frequency in the highfrequency band is demonstrated by the well-known Jonscher AC power law given by the following expression.…”