Ionic, XRD, Dielectric and cyclic voltammetry studies on PVdF-co-HFP/MMT clay intercalated LiN(C2F5SO2)2 based composite electrolyte for Li-ion batteries

The composition dependence of plasticizer, (EC/DMC)((70.x (wt%))) and LiBETIx(wt%) salt for fixed contents on PVdF-co-HFP(25wt%)/surface modified(SM)-octadecylamine MMT(ODA-MMT) nanoclay(5wt%) host matrix by varying its compositions x=1.5, 3.0, 4.5, 6.0 wt% prepared via solution casting technique has been investigated by A.C. Impedance, Dielectric, XRD, and cyclic voltammetry(CV) studies. The enhanced conductivity 2.1X10-5 S/cm at 30 C is observed for (EC/DMC)(70-6)wt% /LiBETI(X=6)wm. The XRD at 20=20.9 degrees confirms beta-phase formation, and CV studies on membranes show cyclability and reversibility. The dielectric studies show increase in dielectric constant and dielectric loss with decrease in frequency is attributed to high contribution of charge accumulation at the electrode-electrolyte interface.