In the present study, we have made an attempt to prepare complexed PVA-PVP-KNO3-BaTiO3 blend composite polymer electrolyte membranes composed of potassium nitrate (KNO3) as salt and BaTiO3 of various concentrations as filler and studied their properties. The advantages of addition the fillers are the increase in ionic conductivity at room temperatures and the improvement of the stability at the interface with electrodes. | Cite this paper Vietnam J. Chem. 2023 61 2 158-169 Research article DOI Investigation of structural and conductivity properties of poly vinyl alcohol -based electrospun composite polymer blend electrolyte membranes for battery applications Rahmat Gul Wan Ahmad Kamil Mahmood School of Chemical Sciences University Sains Malaysia 11800 Minden Pulau Penang Malaysia Submitted May 24 2021 Revised June 17 2022 Accepted October 4 2022 Abstract Solid polymer electrolyte has attracted great interest for the next generation of electrochemical devices such as batteries but the low ionic conductivity and poor stability has retarded their commercial acceptance for energy storage devices applications. To overcome these issues strategies to develop composite polymer electrolytes CPEs are drawing interest. Nanocomposite solid polymer blend electrolyte membranes based on poly vinyl alcohol PVA poly vinyl pyrrolidone PVP of various compositions that contained potassium nitrate KNO 3 as a dopant salt and Barium Titanate BaTiO3 as a filler were prepared with various concentrations of filler using electrospinning technique. The structural and complex formations due to interaction of various groups of the prepared composite polymer electrolyte membranes were investigated using X-ray diffraction XRD and Fourier transform infra-red FTIR spectral analysis. The conductivity of the PVA-PVP-KNO3-BaTiO3 polymer electrolyte systems was found to vary between 10-9 and 10-5 S cm-1 at 298 K with the increase in filler concentration. The maximum room temperature ionic conductivity 10-5 S cm-1 has been obtained for 9 wt BaTiO3 doped polymer electrolyte system. The addition of filler also enhanced the thermal stability of the electrolyte. The temperature dependence ionic conductivity of the prepared complexed polymer electrolyte systems appears to obey Arrhenius behaviour. Keywords. Composite polymer electrolyte ionic conductivity nanofiber membrane .
