Multilayered structure of N-carbonenvelopediron oxide/graphene nanocomposites as an improved anode for Li-ion battery |
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| Institution: | 1. College of Physics, Qingdao University, Qingdao 266071, China;2. Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300071, China;1. College of Physics, Center for Marine Observation and Communications, Qingdao University, Qingdao 266071, China;2. College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Ji’nan 250014, China;1. College of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China;2. School of Chemistry and Chemical Engineering, Henan D&A Engineering Center of Advanced Battery Materials, Henan Key Laboratory of Bimolecular Reorganization and Sensing, Shangqiu Normal University, Shangqiu 476000, China;1. NEST Lab, Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China;2. College of Sciences & Institute for Sustainable Energy, Shanghai University, Shanghai 200444, China;3. Shanghai CENAT New Energy Co., Ltd., Shanghai 201815, China;1. Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education), College of Chemistry & Materials Science, Northwest University, Xi''an 710069, PR China;2. National Key Laboratory of Photoelectric Technology and Functional Materials (Culture Base), National Photoelectric Technology and Functional Materials & Application International Cooperation Base, Institute of Photonics & Photon-Technology, Northwest University, Xi''an 710069, PR China;1. College of Chemistry, Nanchang University, Nanchang 330031, China;2. College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China;3. School of Chemical Engineering and Energy Technology, Donogguan University of Technology, Dongguan 523808, China |
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| Abstract: | Transition metal oxides with high capacity are considered a promising electrode material for lithium-ion batteries (LIBs). Nevertheless, the huge volume expansion and poor conductivity severely hamper their practical application. In this work, a carbon riveting method is reported to address the above issues by designing multilayered N-doped carbon (N-carbon) enveloped Fe3O4/graphene nanosheets. When evaluated as a negative electrode, the N-carbon/Fe3O4/graphene nanocomposites demonstrate greatly enhanced electrochemical properties compared with Fe3O4/graphene. The N-carbon/Fe3O4/graphene presents a superior reversible capacity (807 mAh/g) over Fe3O4/graphene (540 mAh/g). Furthermore, it affords a considerable capacity of 550 mAh/g at 1 A/g over 700 cycles, indicating superb cycling stability. The structure-property correlation studies reveal that the carbon riveting layer is essential for enhancing the lithium diffusion kinetics. The good electrochemical properties and effective structure design make the carbon riveting strategy quite general and reliable to manipulate high performance electrodes for future LIBs. |
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| Keywords: | Nanosheet N-doped carbon Anode Lithium-ion batteries |
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