Graphene-encapsulated Fe3O4 nanoparticles show high capacity and cycle life as Li-ion anode material
Researchers in Australia and China have synthesized Fe3O4–graphene composites with three-dimensional laminated structures using a simple in situ hydrothermal method.
The material shows the Fe3O4–graphene nanocomposite with a graphene content of 38.0 wt % exhibits a stable capacity of about 650 mAh g-1 with no noticeable fading for up to 100 cycles in the voltage range of 0.0–3.0 V.
The superior performance of Fe3O4–graphene is clearly established by comparison of the results with those from bare Fe3O4. The graphene nanosheets in the composite materials could act not only as lithium storage active materials, but also as an electronically conductive matrix to improve the electrochemical performance of Fe3O4.—Wang et al.
A paper on their work was published online 5 November in Chemistry – A European Journal.
Wang, J.-Z., Zhong, C., Wexler, D., Idris, N. H., Wang, Z.-X., Chen, L.-Q. and Liu, H.-K. (2010) Graphene-Encapsulated Fe3O4 Nanoparticles with 3D Laminated Structure as Superior Anode in Lithium Ion Batteries. Chemistry – A European Journal, doi: 10.1002/chem.201001348