Electrical and structural characterization of NaF doped PVA-PEG solid polymer blend electrolyte films

Abstract

Solid polymer blend electrolyte films of PVA (Polyvinyl Alcohol) and PEG (Polyethylene Glycol) doped with NaF (Sodium Fluoride) are characterized by XRD and FTIR techniques. The X-ray diffraction (XRD) spectra shows a characteristic peak of PVA indicating its semi-crystalline nature. By the addition of NaF into the polymer blend matrix, the intensity of peak decreases gradually, suggesting a decrease in the degree of crystallinity of the samples. FTIR study confirmed the complexation and functional group occurred by the addition of NaF in the polymer blend. Dielectric and a.c. conductivity studies were carried out to the as prepared films at room temperature. Dielectric Constant (e′) is maximum and found to decrease with increase in frequency and electrical conductivity of the complexed polymer blends increases by the addition of NaF. Literature reveals that these films found applications in energy storage devices.