Proton conductivity and dielectric studies on chitosan/polyvinyl alcohol blend electrolytes: synergistic improvements with ionic liquid and graphene oxide

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dc.contributor.authorYılmazoğlu, Mesut
dc.contributor.authorOkkay, Hikmet
dc.contributor.authorAbacı, Ufuk
dc.contributor.authorÇoban, Ozan
dc.date.accessioned2024-09-27T07:52:17Z
dc.date.available2024-09-27T07:52:17Z
dc.date.issued2024
dc.departmentFakülteler, Mühendislik Fakültesi, Metalurji ve Malzeme Mühendisliği Bölümü
dc.description.abstractThis study investigates the impact of ionic liquid, 1-methylimidazolium tetrafluoroborate (IL) and graphene oxide (GO) on the performance of chitosan/polyvinyl alcohol (CS/PVA)-based composite electrolytes. Fourier-transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) confirm the successful incorporation of IL and GO, affecting the structural and morphological properties of the electrolytes. Thermogravimetric analysis (TGA) reveals enhanced thermal stability in GO-doped samples, with increased residual weight at high temperatures, while IL addition leads to higher initial weight loss due to its hygroscopic nature. Ionic conductivity measurements demonstrate that the CS/PVA/IL-GO(4.0) composite achieves the highest proton conductivity of 1.76 × 10−3 S/m at 300 K and 1 MHz, surpassing other samples and aligning with top values reported in literature. Dielectric studies show a significant increase in dielectric constant to 9.55 × 104 at 300 K and 20 Hz for CS/PVA/IL-GO(4.0), attributed to enhanced dipole alignment and polarization effects. The loss tangent analysis indicates the shortest relaxation time of 2.07 × 10−4 s for CS/PVA/IL-GO(4.0), correlating with its superior proton conductivity. These findings highlight the potential of CS/PVA/IL-GO electrolytes for advanced energy storage and conversion applications, suggesting further research into GO dispersion and long-term stability for optimized performance in practical devices.
dc.identifier.doi10.1016/j.ijbiomac.2024.135502
dc.identifier.issn0141-8130
dc.identifier.issn1879-0003
dc.identifier.pmid39255890
dc.identifier.scopus2-s2.0-85203409606
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.ijbiomac.2024.135502
dc.identifier.urihttps://hdl.handle.net/11501/1531
dc.identifier.volume279
dc.identifier.wosWOS:001313016700001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.institutionauthorÇoban, Ozan
dc.institutionauthorid0000-0002-1506-4619
dc.language.isoen
dc.publisherElsevier B.V.
dc.relation.ispartofInternational Journal of Biological Macromolecules
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectChitosan/Polyvinyl Alcohol
dc.subjectGraphene Oxide
dc.subjectIonic Liquid
dc.titleProton conductivity and dielectric studies on chitosan/polyvinyl alcohol blend electrolytes: synergistic improvements with ionic liquid and graphene oxide
dc.typeArticle

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