Investigation of structural, dielectric, and AC conductivity response in potassium-based polymer electrolytes: Tailoring PEO-PVDF blends for enhanced performance

IF 3 4区材料科学 Q3 CHEMISTRY, PHYSICAL

Solid State Ionics Pub Date : 2025-02-26 DOI:10.1016/j.ssi.2025.116811

Venkata Ramana Jeedi , Kiran Kumar Ganta , Rayudu Katuri , N. Kundana , Malla Reddy Yalla , Anji Reddy Polu , Firdaus Mohamad Hamzah

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引用次数: 0

Abstract

Polymer electrolyte membranes comprising Poly(ethylene Oxide) and Poly(vinylidene Fluoride) blends complexed with KNO₃ were developed using the solution casting technique by varying the polymers. These systems were extensively characterized through X-Ray Diffractogram, Fourier Transform Infrared, and SEM to analyze their complexation behavior, functional groups, and morphology. The ionic conductivity and electrical characteristics were investigated via impedance spectroscopy over a frequency up to 10 MHz. Dielectric properties, including the dielectric constant (ε'), dielectric loss (ε"), relaxation time (τ), and modulus (M' and M"), were also examined. The AC conductivity profile revealed a frequency-independent plateau, indicating ion migration as the primary contributor to conductivity. The 80PEO:20PVDF composition exhibited the highest ionic conductivity (1.60 × 10⁻⁴ S.cm⁻¹) and the least activation energy, attributed to efficient ion dissociation and structural reorganization due to the interactions between PEO and PVDF molecules.

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来源期刊

Solid State Ionics 物理-物理：凝聚态物理

CiteScore

6.10

自引率

3.10%

发文量

152

审稿时长

58 days

期刊介绍： This interdisciplinary journal is devoted to the physics, chemistry and materials science of diffusion, mass transport, and reactivity of solids. The major part of each issue is devoted to articles on: (i) physics and chemistry of defects in solids; (ii) reactions in and on solids, e.g. intercalation, corrosion, oxidation, sintering; (iii) ion transport measurements, mechanisms and theory; (iv) solid state electrochemistry; (v) ionically-electronically mixed conducting solids. Related technological applications are also included, provided their characteristics are interpreted in terms of the basic solid state properties. Review papers and relevant symposium proceedings are welcome.