Woo, Haw Jiunn and Yung, Chung Chen and Shujahadeen, B. Aziz and Yong, Jacky and Mayeen, Uddin Khandaker (2025) Correlated barrier hopping dynamics of Na+ ions in poly (vinyl alcohol) biopolymer-based solid polymer electrolytes: Electrical and structural analysis. In: The 18th International Symposium on Ploymer Electrolytes, 23-28 June 2024, Langkawi, Kedah Darul Aman, Malaysia.
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Text (Conference paper)
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Abstract
In recent years, the use of sodium-ion based solid polymer electrolyte (SPE) in energy storage applications has been attracting attention in research. However, SPEs are still suffering from lower ionic conductivity in room temperature, and sodium-ion based SPEs are not yet on par with lithium-ion based SPEs in terms of the overall performance. Therefore, understanding the conduction mechanism of a sodium-ion based SPE is crucial to design and optimize the performance of a sodium-ion based device. Herein, partially hydrolyzed PVA-based SPE was prepared with NaPF6. From the power law region of the plotted AC conductivity graph, the frequency exponent value, s is calculated to be s < 1. The decreasing of s value when temperature increases also suggests that the SPE system follows the Correlated Barrier Hopping (CBH) model where ions conduct through correlated hopping between sites by overcoming barrier heights or potential wells, with conductivity being dependent on both temperature and frequency. The SPE with PVA:NaPF6 ratio of 60:40 (PVA60) exhibits the highest room temperature ionic conductivity of 3.65 × 10
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Funders: | None |
| Additional Information: | Conference paper |
| Uncontrolled Keywords: | Solid polymer electrolyte; Poly(vinyl) alcohol; Sodium hexafluorophosphate; Electrical properties; Conduction mechanism |
| Subjects: | Q Science > Q Science (General) Q Science > QC Physics |
| Divisions: | Faculty of Science > Department of Physics |
| Depositing User: | Mr. Mohd Safri |
| Date Deposited: | 15 Aug 2025 01:21 |
| Last Modified: | 15 Aug 2025 01:21 |
| URI: | http://eprints.um.edu.my/id/eprint/47687 |
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