Tavorite-structured lithium-metal-fluorophosphates for Li+ transition have been recognized as a good alternative to olivine-type cathodes for lithium-ion batteries. They show an exceptional ionic conductivity, excellent thermal stability and capacity retention. In this work, LiFePO4F with high purity is successfully synthesized by a two-step solid-state route. Rietveld refinement shows that open pathways for 3D ion transport exist in LiFePO4F and its discharged state (Li2FePO4F). Cyclic voltammetry data exhibit a clear indication of the Fe3+/2+ redox couple that involves a two-phase transition. Galvanostatic discharge-charge cycling was examined at the rates 0.1 - 5C up to 1000 cycles. The voltage plateaus on 2.71 / 2.86V indicate a low electrode polarization of 0.15V. This work attained the largest initial discharge capacity at the highest rate (1C) reported to date, and almost the same capacity retention at a tenfold higher rate (1C) than that (0.1C) within the maximum cycles of 100 reported to date.