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The Effects of Ceramic Fillers on PMMA-Based Polymer Electrolyte Salted With Lithium Triflate, LiCF3SO3

2021-04-13 07:47:00
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Summary ：A series of poly(methyl methacrylate) PMMA based solid polymer electrolytes have been prepared and investigated by using a solution cast technique. The ethylene carbonate (EC) is chosen as a plasticizer, SiO2 and Al2O3 were implemented as ceramic filler and the lithium triflate salt (LiCF3SO3) as a main ions carrier to the polymer host systems. T
A series of poly(methyl methacrylate) PMMA based solid polymer electrolytes have been prepared and investigated by using a solution cast technique. The ethylene carbonate (EC) is chosen as a plasticizer, SiO2 and Al2O3 were implemented as ceramic filler and the lithium triflate salt (LiCF3SO3) as a main ions carrier to the polymer host systems. The conductivity behaviours of the samples prepared were studied by ac impedance spectroscopy (EIS), infrared spectroscopy (FTIR) and electron microscope technique (SEM). From the results obtained, it is proven that 25wt% of LiCF3SO3 added into the PMMA–EC system shows best performance with the highest conductivity value of 1.36 × 10−5 Scm−1. The conductivity is further enhanced to 2.05 × 10−4 Scm−1 with the addition of 5wt% of Al2O3 and 2.15 × 10−5 Scm−1 with addition 10wt% of SiO2. The studies showed that the salt is helped to increase the number of charge carrier and provided free ions for conduction whereas ceramics fillers are capable of providing an extra conduction channels that further enhanced the conduction factor of the polymer electrolyte. Ionic conductivity increased with respect to the enhancement of the charge carried and filler, however excessive amount of these additives caused the conductivity to decrease. The results are further proven and supported by FTIR and SEM studies. 
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