Potassium ion coordination and ionic transport in Alginate–PVA polymer electrolyte

Wahab, N.A and Mohd. Ali, Noor Saadiah and Ghazali, N.M. and Aoki, K. and Nagao, Yuki and Mazuki, N.F. and Samsudin, A. S. (2025) Potassium ion coordination and ionic transport in Alginate–PVA polymer electrolyte. Materials Science and Engineering: B, 322 (118644). pp. 1-14. ISSN 09215107

	PDF - Published Version Restricted to Registered users only Download (10MB) | Request a copy
Preview	PDF (WOS) - Supplemental Material Download (148kB) | Preview
Preview	PDF (Scopus) - Supplemental Material Download (213kB) | Preview

Abstract

Solid biopolymer electrolyte (SBPE) systems based on alginate–polyvinyl alcohol (Al–PVA) doped with varying contents of potassium carbonate (K2CO3) were successfully developed using a solution casting technique. Structural analysis via FTIR and XPS confirmed strong interactions between K+ ions and the functional groups of the biopolymer blend. XRD results revealed reduced crystallinity with salt incorporation, indicating enhanced amorphousness favorable for ion transport. Thermal analysis using TGA and DSC showed improved thermal stability and segmental mobility with increasing K2CO3 content. Impedance spectroscopy indicated a notable drop in bulk resistance with optimal conductivity of 1.31 × 10−5 S cm−1 achieved at 12 wt% K2CO3. Temperature-dependent conductivity obeyed Arrhenius behavior, confirming thermally activated ion conduction. Transport parameters derived using the Arof–Noor model (number of charge carriers, mobility, and diffusion coefficient) exhibited trends consistent with conductivity results. These findings demonstrate the Al–PVA–K2CO3 SBPE system’s potential for energy-related applications requiring sustainable and thermally stable electrolytes.

Item Type:	Article (Journal)
Uncontrolled Keywords:	Biopolymer blend K+ ions conduction Physicochemical properties Ion-charge mobility Electrolytes materials
Subjects:	Q Science > Q Science (General) Q Science > QC Physics Q Science > QD Chemistry
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Centre for Foundation Studies
Depositing User:	Dr. Noor Saadiah Mohd Ali
Date Deposited:	07 Dec 2025 11:06
Last Modified:	07 Dec 2025 11:06
Queue Number:	2025-12-Q383
URI:	http://irep.iium.edu.my/id/eprint/124971

Actions (login required)

View Item