Synthesis of FeF₃ fluoride electrode material using polytetrafluoroethylene

Abstract

A fluoride electrode material for lithium-ion batteries, FeF₃, was synthesized by a novel solid-state reaction method using polytetrafluoroethylene (PTFE) as a fluoride source instead of HF. FeF₃ was obtained as the main phase according to the XRD patterns of the samples prepared in the present study. Furthermore, the synthesized FeF₃ particles were nanosize. The initial discharge and charge capacities of the FeF₃ sample were 387 and 293 mAh/g, respectively, in the 4.5–1.0 V region.