FEMC-deuterogenic artificial solid electrolyte interphase boosts high-performance sodium-ion batteries.

A NaF-rich composite artificial interphase is generated relying on a simple chemical reaction by regulating methyl 2,2,2-trifluoromethyl ester reactivity, which can promote rapid ion transport and effectively inhibit dendrite growth in carbonate electrolytes. The assembled NaF@Na‖NaV(PO) full cell attains a long lifespan of 4000 cycles at 5C with 95% capacity retention, and a high specific capacity of 80.8 mAh g at 30C.