Studies on AC Electrical Conductivity and Dielectric Properties of Organic Acid-Doped PVA Solid Polymer Electrolyte Films | ||||
| Journal of Basic and Environmental Sciences | ||||
| Volume 12, Issue 1, January 2025, Page 38-59 PDF (1.53 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jbes.2025.344287.1012 | ||||
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| Authors | ||||
A. A. Eissa  ; E. M. Kamar* ; M. A. Mousa* ; M. Sameeh*
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| Chemistry Department, Faculty of Science, Benha University, Benha, Egypt, 13511. | ||||
| Abstract | ||||
| Solid polymer electrolytes have been widely researched due to their numerous applications in different electrochemical devices. Typically, these solid polymer electrolytes are made up of a polymer that serves as the host material, offering strength and good mechanical stability, alongside a suitable component that provides ionic carriers to enable electrical conductivity. In our research, we synthesized PVA/organic acid polymer electrolyte films using a solution casting technique. The resulting PVA films modified with acetic, oxalic, and citric acids were analyzed through XRD, FTIR spectroscopy, UV-Vis spectroscopy, SEM morphology analysis, stress-strain testing, and ac impedance measurements. The XRD analysis indicates that the introduction of organic acids into the PVA matrix enhances its amorphous nature. The IR spectra support the formation of polymer salt complexes. The findings revealed that the highest ionic conductivity at room temperature for the PVA/citric acid solid polymer membrane electrolyte system was 6.61x10-3 S cm -1, while the ionic conductivity of pure PVA films was the lowest at 1.13 × 10-8 S cm-1. This study demonstrated that the increase in ionic conductivity was influenced by the type of organic acids used. The dielectric constant showed a significant exponential decline with rising frequency for both pure PVA and PVA films doped with organic acids. Additionally, the PVA/organic acid composite polymer membranes displayed favorable mechanical strength and ductility, making them an appropriate choice for polymer membrane electrolytes in energy storage applications. | ||||
| Keywords | ||||
| Ionic conductivity; Uv-vis; transference number | ||||
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