Fe3O4/Graphene Composite Anode Material for Fast-Charging Li-Ion Batteries |
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| Authors: | Antunes Staffolani Hamideh Darjazi Gilberto Carbonari Fabio Maroni Serena Gabrielli Francesco Nobili |
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| Institution: | Chemistry Division, School of Science and Technology, University of Camerino, 62032 Camerino, Italy; (A.S.); (H.D.); (G.C.); (F.M.); (S.G.) |
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| Abstract: | Composite anode material based on Fe3O4 and reduced graphene oxide is prepared by base-catalysed co-precipitation and sonochemical dispersion. Structural and morphological characterizations demonstrate an effective and homogeneous embedding of Fe3O4 nanoparticles in the carbonaceous matrix. Electrochemical characterization highlights specific capacities higher than 1000 mAh g−1 at 1C, while a capacity of 980 mAhg−1 is retained at 4C, with outstanding cycling stability. These results demonstrate a synergistic effect by nanosize morphology of Fe3O4 and inter-particle conductivity of graphene nanosheets, which also contribute to enhancing the mechanical and cycling stability of the electrode. The outstanding capacity delivered at high rates suggests a possible application of the anode material for high-power systems. |
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| Keywords: | Li-ion batteries conversion materials graphene anode materials electrochemical impedance spectroscopy |
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