Facile synthesis and electrochemical properties of Fe3O4 nanoparticles for Li ion battery anode

- A simple and inexpensive ultrasonic assisted co-precipitation route has been followed to make monodisperse Fe3O4 nanoparticles.
- Anodes made from the Fe3O4 nanoparticles exhibit specific reversible capacity of ∼1000 mAh g−1.
- The anodes could operate at a current density from 100 to 4000 mA gm−1 with coulombic efficiency of almost 100%.
- The anodes showed excellent cyclic stability for at least 200 cycles without capacity fade, and returned to specific capacity of 1000 mAh gm−1 at 0.1 C after multiple high current charge-discharge cycles.