Reduced graphene oxide decorated with FeF3 nanoparticles: Facile synthesis and application as a high capacity cathode material for rechargeable lithium batteries

In this paper, we demonstrate the preparation of reduced graphene oxide (rGO) decorated with FeF 3 nanoparticles (FeF 3 NPs) by adding FeF 3 aqueous solution to the rGO ethanol/water dispersion. The obtained FeF 3 /rGO nanocomposite is further tested as a cathode material for rechargeable lithium batteries and found to have high discharge capacities, good rate capabilities and cycling performance. It can deliver a high discharge capacity of 476   mAh   g −1 at a current density of 50   mA   g −1 in the voltage range 1.0–4.5   V. It still delivers a discharge capacity of 146   mAh   g −1 with 81% capacity retention after 50 charge–discharge cycles under a current density of 1000   mA   g −1 in the voltage range 1.7–4.5   V.