Impact of Incorporating Different Metal Oxide Nanoparticles on Structures and AC Conductivity of PVC/PVDF-based Electrolytes

Abstract

The synthesis of metal oxide nanoparticles-doped PVC/PVDF/LiCl and PVC/PVDF/Li₂CO₃, plasticized with glycerol, was carried out. The solid polymer electrolyte (SPE) was analyzed for its structural properties and ionic conductivity using X-ray diffraction and an LCR meter. The structural analysis revealed that the SPE possessed a semi crystalline structure. The use of lithium salts resulted in a reduction in crystallinity or a transition towards an amorphous phase. However, the inclusion of metal oxide NPS led to an increase in the broadening of the most dominant diffraction peaks. The A.C. conductivity measurements demonstrated that the highest conductivity was achieved in PVC/PVDF/LiCl doped with WO₃NPs. Measurements were conducted for both the dielectric constant and the dielectric loss. The minimal glass transition temperature for PVC/PVDF/LiCl doped with WO₃NPs was determined using differential scanning calorimetry.