Disordered Lithium‐Rich Oxyfluoride as a Stable Host for Enhanced Li⁺ Intercalation Storage

Abstract

A new intercalation compound Li2VO2F with disordered rock-salt structure enables up to ≈1.8 Li+ storage (420 mAh g−1) at ≈2.5 V with a lattice volume change of only ≈3%. A high capacity of 300 mAh g−1 at 1C rate is observed. At –10 °C, Li2VO2F can deliver a reversible capacity of 280 mAh g−1 at ≈2.4 V.