MATERIALS AND SUSTAINABLE DEVELOPMENT: ADVANCED MATERIALS FOR CLEAN ENERGY UTILIZATION |
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Preparation of Fe3O4/Nitrogen-doped Graphene Composite via Solid-state Shear Pan-milling Method and Its Application in Lithium Ion Battery |
WANG Qingfu, LIU Xingang, KANG Wenbin, ZHANG Chuhong
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State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065 |
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Abstract Different from traditional ball milling, solid-state shear pan-milling is an innovative approach that enables the synthesis of functional micro- and nano-composites. When graphite and nanometer scale Fe3O4 are applied as the raw material and melamine as the nitrogen doping agent, a composite of Fe3O4 and N-doped graphene (Fe3O4/N-G) could be successfully synthesized by employing the solid-state shearing pan-milling method. After characterization by X-ray diffraction (XRD), Raman spectroscopy (RM), transmission electronic microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Brunauer, Emmett and Teller analysis (BET) and electrochemical measurements, it is found that graphite could be exfoliated into few-layered graphene while simultaneously doped by nitrogen and composited with Fe3O4 uniformly. When applied as an anode for lithium ion battery, an excellent cycling stability with a reversible capacity of 869 mAh·g-1 after 100 cycles at 100 mA·g-1 is delivered, which is far superior to pristine Fe3O4 with only 78 mAh·g-1 retained. The technique provides a green, and facile method for the preparation of graphene based composite electrode materials.
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Published: 21 November 2018
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