Preparation and characterization of PVC/PMMA blend polymer electrolytes complexed with LiN(CF3SO2)2

Abstract

Thin films of polymer blend electrolytes comprising Poly(vinyl chloride) (PVC) and Poly(methyl methacrylate)(PMMA) and plasticized with a combination of ethylene carbonate (EC) and propylene carbonate (PC) for different lithium imide salt, LiN(C 2 F 5 SO 3 ) 2 , concentrations were prepared using the solution casting technique. The films were subjected to a. c. impedance measurements as a function of temperature ranging from -30 °C to 70 °C. The variation of ionic conductivity as a function of temperature and PVC content in the blend was analysed. The role of PMMA in the phenomena occurring at the interface between the plasticized polymer electrolyte and lithium electrode was also studied. The cast films were also subjected to TG/DTA and FT-IR studies which are discussed.

Conductivity and Dynamic Mechanical Studies of PVC/PEMA Blend Polymer Electrolytes

“…The increase in conductivity with salt concentration is attributed to the increasing number of ion dissociated from salt in the amorphous phase of PVC [7]. This is consistent with the work reported by A. M. Stephan et al [8]. The decrease in ionic conductivity after the maximum could be attributed to the decrease in the number of ions which is caused by ion association due to the presence of a large number of ions [9].…”

Studies on AC Electrical Conductivity and Dielectric Properties of PVA/NH<sub>4</sub>NO<sub>3</sub> Solid Polymer Electrolyte Films

“…Peaks corresponding to NH 4 NO 3 have been found to be absent in the complexes indicating the complete disassociation of salt in polymer matrix. Thus XRD analysis reveals the complex formation between the polymer and the salt [8]- [12].…”

Recent Advances in Plasticizers

“…The ionic conductivity is reduced to 4.20×10 -8 Scm -1 with increasing the PC mass loadings further. This is suggestive of the decrease in effective number of charge carriers for ionic transportation as a result of the domain of short-range ion-plasticizer interactions within the polymer matrix (Stephan et al, 2002). Hence, the ionic conductivity is lower than of other plasticized-polymer electrolytes because of the reduced amount of lithium cations.…”