Abstract
In this research, new thin film of a free standing electrolyte film containing poly(vinyl) chloride (PVC), 50% liquid epoxidized natural rubber (LENR50), Ethylene carbonate (EC) blends as a host for the electrolyte which was doped with lithium perchlorate (LiClO4) as the dopant salt was successfully prepared with solution casting technique. The polymer electrolyte of PVC-LENR50-EC-LiClO4 was characterized using impedance spectroscopy (EIS), scanning electron microscopy (SEM) and Fourier transform infrared (ATR-FTIR). From the EIS results shows that electrolyte exhibited the highest ionic conductivity of 2.1 × 10–7 S●cm–1 at the 30 wt.% of LiClO4. The ionic conductivity result was supported by the morphological studies which revealed the good homogeneity of the PVC-LENR50-EC blends as no phase separation was observed. The smooth surface can ease the mobility of ions in the system complexes. In addition, the formation of micro-pores by introducing lithium salts to the electrolyte also improved the transportation properties of L+ ions in the electrolyte system and hence improving its ionic conductivity. The features of complexation of the electrolytes were studied by ATR-FTIR.
Highlights
Ionic conducting polymer was first suggested by Fenton and Wright in 1973
New thin film of a free standing electrolyte film containing poly(vinyl) chloride (PVC), 50% liquid epoxidized natural rubber (LENR50), Ethylene carbonate (EC) blends as a host for the electrolyte which was doped with lithium perchlorate (LiClO4) as the dopant salt was successfully prepared with solution casting technique
We successfully prepared a solid polymer electrolyte consisting of modified low molecular weight rubber LENR50 based PVC-LiClO4 system with enhancement of ethylene carbonate, EC
Summary
Ionic conducting polymer was first suggested by Fenton and Wright in 1973. Since the pioneering work by Wright on ions conductivity in the poly (ethylene oxide)/alkali metal salt complexes, the studies on solid polymer electrolytes (SPEs) have attracted and receiving a great deal of attention due to its proposed large scale use in high energy density secondary lithium ion batteries, sensors, solar cell, fuel cell as well as electrochromic smart windows [1,2,3,4]. The inexpensive PVC can well solvated with the inorganic salts [8,12,13,14,15,16] Modified natural rubber such as ENR 50 and MG49 has received great attentions from many researches for its distinctive properties of having low glass transition temperature and good elasticity and adhesion properties [5,7,11]. These modified rubbers can provide coordination sites for Li+ ions conduction and produce a great number of charge carriers for ionic transport because both have a lone pair of electrons from the oxygen atom. We successfully prepared a solid polymer electrolyte consisting of modified low molecular weight rubber LENR50 based PVC-LiClO4 system with enhancement of ethylene carbonate, EC
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