Abstract
In this study, the Fe3O4 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 Fe3O4 thin film has been prepared by using an electron beam evaporation system followed by heat treatment. Electrochemical measurement showed that the as-fabricated Fe3O4 thin film showed the conventional charge–discharge voltage profiles of magnetite and good cycle performance. The initial reversible capacity of Fe3O4 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).
Highlights
Magnetite (Fe3O4) is a half-metallic metal oxide with the inverse spinel structure and space group Fd3m [1]
The iron-based materials can be used for their promising application to Li-ion batteries (LIBs) as anode materials owing to their low cost and low toxicity [2, 3]
The structure and phase purity of Fe3O4 thin film electrode sample are examined by X-ray diffraction (XRD)
Summary
Magnetite (Fe3O4) is a half-metallic metal oxide with the inverse spinel structure and space group Fd3m [1]. The iron-based materials can be used for their promising application to Li-ion batteries (LIBs) as anode materials owing to their low cost and low toxicity [2, 3]. Among these oxides, magnetite (Fe3O4) has been considered as anode materials for LIBs because of its high capacity (928 mAh g−1), natural abundance, and high electronic conductivity [4,5,6]. Many efforts have been reported to improve its drawbacks with increased durability, high cycle stability, and rate capability. E-beam evaporator have been readily used as anode materials without further process, presenting improved performance compared to the conventional anodic Fe3O4 materials
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