The Preparation of Fe 3 O 4 Thin Film and Its Electrochemical Characterization for Li-Ion Battery

In this study, the Fe 3 O 4 thin film was prepared as anode materials to simultaneously provide higher reversible Li + capacity compared to 2D materials with high cycle properties for lithium ion batteries. Nano-crystalline Fe 3 O 4 thin film has been prepared by using an electron beam evaporation system followed by heat treatment. Electrochemical measurement showed that the as-fabricated Fe 3 O 4 thin film showed the conventional charge–discharge voltage profiles of magnetite and good cycle performance. The initial reversible capacity of Fe 3 O 4 thin film was maintained during the 100 cycles with no capacity fading in a potential range of 0.005–3.0 V (vs. Li + /Li).