Structure of triplite LiFeSO4F powder synthesized through an ambient two-step solid-state route

The triplite LiFeSO 4 F displays both the highest potential ever reported for an Fe-based compound, as well as a comparable specific energy with that of popular LiFePO 4 . The synthesis is still a challenge because the present approaches are connected with long time, special equipments or organic reagents, etc. In this work, the triplite LiFeSO 4 F powder was synthesized through an ambient two-step solid-state route. The reaction process and phase purity were analyzed, coupled with structure refinement and electrochemical test.