Revealing structural and electrical details of PVA/LiClO4 thermoplastic membranes

• Published in: Materials science & engineering. B, Solid-state materials for advanced technology Vol. 302; p. 117219
• Main Authors: Pinto, Y.M.C., da Silva, J.P., Nobre, F.X., Anglada-Rivera, J., Comedi, D., Silva, R.S., Paula, M.M.S., Michielon de Souza, S., Aguilera, L., Leyet, Y.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.04.2024
• Subjects: Crystallinity; Polymeric electrolytes; PVA; Rietveld method; Rietveld method; PVA; Polymeric electrolytes; Crystallinity
• ISSN: 0921-5107; 1873-4944
• DOI: 10.1016/j.mseb.2024.117219

•The effect of LiClO4 content on the properties of PVA membranes is presented.•DRX analysis confirmed the semi-crystalline nature of the membranes.•The crystallinity of the PVA membranes was calculated using the Rietveld method.•The resistance of the membranes decreases with the Li content up to 10 % (1.4 x 103 Ω). This study aims to explore the structural and electrical properties of thermoplastic membranes made of polyvinyl alcohol (PVA) with Lithium Perchlorate (LiClO4), which were prepared using the solvent evaporation method. The PVA crystalinity were calculated by using the Rietveld method on X-ray diffraction(XDR), thus, it was possible to notice modifications in the unit cell parameters that corresponded to P21/m space group and monoclinic symmetry. Through the application of infrared and Raman spectroscopies, we demonstrate the influence of Li+ on the vibrational modes of the polymer's polar group and carbon bonds. Additionally, our complex impedance analysis indicates a decrease in resistance as the salt content increases, reaching a minimum value of 1.4 * 103 Ω at a 10 % salt concentration. The applied structural and electrical characterization techniques indicated that PVA- 5 % LiClO4 exhibits the highest crystallinity and electrical conduction among all the membranes studied. Consequently, these findings highlight the promising potential of the synthesized material for further investigation and its possible applications in technological devices.