Modulating SEI formation via tuning the solvation sheath for lithium metal batteries

Abstract

The solvation sheath of Li⁺–glyme was modulated to enhance Li⁺–TFSI⁻ association by adopting a highly polar solvent, especially water molecules, which affects the solid electrolyte interface (SEI) layer composition. By the Li⁺–TFSI⁻ association, a TFSI⁻ anion-derived SEI layer is formed on the Li metal anode, resulting in higher Li metal anode efficiency.