Presentation Date: Feb 14, 2026
AGSA Abstract
The growing demand for efficient and sustainable energy storage technologies has positioned sodium-ion batteries (SIBs) as a promising alternative to lithium-ion batteries (LIBs), driven by the natural abundance and cost-effectiveness of sodium. Conventional LIB electrolytes, typically based on organic carbonates, suffer from chemical degradation that limits battery performance and lifespan, while the global availability of lithium resources remains geographically constrained. These challenges have motivated increasing interest in non-lithium-based rechargeable battery technologies and the development of stable electrolyte systems. Glyme-based electrolytes have attracted significant attention due to their high electrochemical stability and strong coordination with sodium ions, making them promising candidates for sodium-ion batteries. In this study, molecular dynamics simulations are employed to investigate the solvation environment and ion transport properties of sodium bis(trifluoromethanesulfonyl)imide (NaTFSI) in glyme-based electrolytes. We examine the solvation structure, ion association, and transport behavior of 1.5 M NaTFSI across six electrolyte systems: monoglyme, triglyme, pentaglyme, and three binary glyme mixtures (75% MG:25% TG, 50% MG:50% TG, and 25% MG:75% TG). While short-chain glymes such as monoglyme and triglyme have been extensively studied, pentaglyme and mixed-glyme electrolytes remain relatively unexplored. The findings provide molecular-level insight into the influence of glyme chain length and electrolyte composition on sodium-ion solvation and transport, offering guidance for the rational design of stable and efficient electrolytes for next-generation sodium-ion batteries.
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