High electrochemical performance of 3.9 V LiFeSO 4 F directly synthesized by a scalable solid- state reaction within 1 h

3.9 V triplite LiFeSO 4 F was synthesized by a scalable solid-state reaction within 1 h without undergoing phase transformation. The resulting material has nanosized particles that achieve almost full capacity and superior rate capability even at 10 C (6 min).