Document Type
Conference Item
Publication Date
1-5-2025
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
Keywords
Solid polymer electrolyte, Poly(vinyl) alcohol, Sodium hexafluorophosphate, Electrical properties, Conduction mechanism
Divisions
PHYSICS
Funders
None
Event Title
The 18th International Symposium on Ploymer Electrolytes
Event Location
Langkawi, Kedah Darul Aman, Malaysia
Event Dates
23-28 June 2024
Event Type
conference
Additional Information
Conference paper