LiClO₄ salt concentration effect on the properties of PVC‐modified low molecular weight LENR50‐based solid polymer electrolyte

Abstract

A work was carried out on a solid polymeric electrolyte system comprising blends of poly (vinyl chloride) and liquid 50% epoxidized natural rubber (LENR50) as a polymer host with LiClO 4 as a salt and prepared by solution casting technique. In this paper, the main study was the effect of LiClO 4 salt concentration on the electrolyte properties. The effect of the salt on the electrolyte properties was characterized and analyzed with impedance spectroscopy (EIS), X-ray diffraction (XRD), differential scanning calorimeter (DSC), and scanning electron microscopy (SEM). The EIS result showed that highest ionic conductivity was obtained at 30 wt % salt with a value of 2.3 Â 10 À8 S cm À1 . The XRD results revealed that the LiClO 4 salt was fully complexed within the polymer host as no sharp peaks were observed. However, above 30 wt % of salt, some sharp peaks were observed. This phenomenon was caused by the association of ions. Meanwhile, DSC analysis showed that T g increased as the salt content increased. This implied that LiClO 4 salt had interaction with polymer host by forming coordination bond. The morphologies' studies showed that good homogeneity and compatibility of the electrolyte were achieved. Upon the addition of the salt, formation of micropores occurred. It was noted that micropores which aid in mobility of ions in the electrolyte system has increased the ionic conductivity.

An Investigation on the Properties of Palm-Based Polyurethane Solid Polymer Electrolyte

“…In the complex impedance plot, the real quantity Z (x-axis) was plotted against Z (y-axis) which displayed the polymer electrolytes characteristics as an arc followed by linear spike that was a straight line inclined to the real axis. The bulk resistance (R b ) of the electrolyte system was determined from an impedance plot where the ionic conductivity ( ) was calculated from R b that was obtained from the intercept on the real axis (Z ), the film thickness (l), and the contact area of the thin film ( = 2 = (0.80 cm) 2 = 2.01 cm 2 ) according to the equation = [l/(AR b )] [8,9]. Table 1 shows the conductivity of PU-LiCF 3 SO 3 electrolyte at varying concentration of LiCF 3 SO 3 salt conducted at room temperature.…”

“…Hence, the segmental motions of the polymer will also increase. This will then improve the transportation property of the electrolyte system [9].…”

Physico-Chemical, Thermal, and Electrochemical Analysis of Solid Polymer Electrolyte from Vegetable Oil-Based Polyurethane

“…On a side note, lithium salts are the most frequently used dopant in the preparation of SPE. Examples of these salts are: lithium bis(trifluoromethane sulfonyl) imide (LiTFSI) [ 21 ], lithium hexafluorophosphate (LiPF 6 ) [ 22 ], lithium perchlorate (LiClO 4 ) [ 23 ], and lithium iodide (LiI) [ 24 ]. The structure of the anion greatly affects the solubility of salts in the polymer electrolyte system.…”

Free-Radical Photopolymerization of Acrylonitrile Grafted onto Epoxidized Natural Rubber

“…To improve the processability and solubility, ENR is further degraded by decreasing its molecular weight, resulting in liquid epoxidized natural rubber (LENR) [ 4 ]. Besides this, Lee et al [ 10 ] and Rahman et al [ 11 , 12 ] have reported that the molecular weight of ENR was successfully decreased via an irradiation process with a UV lamp by breaking the long chains into small chains.…”