Study FTIR and AC Conductivity of Nanocomposite Electrolytes

Abstract

In the present work polymer electrolytes were formulated using the solvent casting technique. Under special conditions, the electrolyte content was of fixed ratio of polyvinylpyrolidone (PVP): polyacrylonitrile (PAN) (25:75), ethylene carbonate (EC) and propylene carbonate (PC) (1:1) with 10% of potassium iodide (KI) and iodine I2 = 10% by weight of KI. The conductivity was increased with the addition of ZnO nanoparticles. It is also increased with the temperature increase within the range (293 to 343 K). The conductivity reaches maximum value of about (0.0296 S.cm-1) with (0.25 g) ZnO. The results of FTIR for blend electrolytes indicated a significant degree of interaction between the polymer blend (PVP and PAN) and the KI salt. From the electrolyte observations of the nanocomposites, the broad peak became narrower after adding the ZnO nanoparticle to the KI salt. The dielectric reaction decreased with the increase of the frequency at room temperature. The high dielectric permittivity of the polymer at lower frequencies can be attributed to the dipoles having sufficient time to get aligned with the electric field, resulting in higher polarization.

FTIR and electrical behavior of blend electrolytes based on (PVA/PVP)

“…The C-H stretching bond shifted from 2977.89 cm -1 to a lower wavenumber of 2972.10 cm -1 , indicating that hydrogen bonding interactions have developed. The CH 2 peak for the (PVA-PVP) has not disappeared entirely for (A3, A4, and A5) samples, indicating that some of the vinyl groups have been left unreacted during the polymerization process [13][14][15][16][17].…”

“…The activation energy (E a ) of an ion is the required energy to detach from its original location and become a free ion. The influence of temperature on conductivity was examined to calculate E a for all electrolytes [15]. According to Fig.…”

“…The temperature of the sample ranged between 293 and 343 K. The real part of the dielectric constant ( ) was determined using Eq. (2) [15]:…”

FTIR and electrical behavior of blend electrolytes based on (PVA/PVP)

“…The C-H stretching bond shifted from 2977.89 cm -1 to a lower wavenumber of 2972.10 cm -1 , indicating that hydrogen bonding interactions have developed. The CH 2 peak for the (PVA-PVP) has not disappeared entirely for (A3, A4, and A5) samples, indicating that some of the vinyl groups have been left unreacted during the polymerization process [13][14][15][16][17].…”

Effect of Glycerin on Electrical and Thermal Properties of PVA/Copper Sulphate Gel Polymer Electrolytes

“…Metal ions from salts interact with each other and polar groups (-OH) of polymers by electrostatic interactions, resulting in the formation of coordinating bonds [17,23]. The type of functional groups attached to the polymer backbone, their compositions and distances between them, molecular weight, branching degree, metal cation nature and charge, and counter ions are all important factors that might affect polymermetal ion interactions [20,24].…”