PEO-SA-NaTFSI-Based Binder with Enhanced Adhesion, Fast Ion Transport, and Robust Solid-Electrolyte Interphase for Sn Anodes Enabling High-Performance Sodium-Ion Batteries.

Sodium-ion batteries (SIBs) are promising for large-scale energy storage due to their high cost-effectiveness and safety. Alloy anodes exhibit significantly higher specific capacities compared to those of carbonaceous anode materials, holding great promise for enhancing the energy density of SIBs. However, their practical application is severely hindered by substantial volume expansion, sluggish reaction kinetics, and continuous fracture reformation of the solid-electrolyte interphase (SEI).