Multiporous core-shell structured MnO@N-Doped carbon towards high-performance lithium-ion batteries |
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| Affiliation: | 1. Department of Chemical and Chemical Engineering, Hefei Normal University, Hefei, 230601, Anhui, China;2. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, CAS, Changchun, 130022, Jilin, China;3. Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, 230031, Anhui, China;1. National Engineering Research Center of Nonferrous Metals Materials and Products for New Energy, GRINM Group Co., Ltd., Beijing, 100088, China;2. GRIMAT Engineering Institute Co., Ltd., Beijing, 101407, China;1. School of Chemistry and Chemical Engineering, Key Laboratory of Electrochemical Energy Conversion Technology and Application, North Minzu University, Yinchuan, 750021, PR China;2. Key Laboratory of Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan, 750021, PR China;3. Ningxia Key Laboratory of Solar Chemical Conversion Technology, North Minzu University, Yinchuan 750021, PR China;1. UNAM–National Nanotechnology Research Center, Bilkent University, Ankara, 06800, Turkey;2. Institute of Materials Science and Nanotechnology, Bilkent University, Ankara, 06800, Turkey;3. NANOTAM - Nanotechnology Research Center, Bilkent University, Ankara, 06800, Turkey;4. Department of Electrical and Electronics Engineering, Bilkent University, Ankara, 06800, Turkey;5. Department of Energy Engineering, Faculty of Engineering, Ankara University, Ankara, 06830, Turkey;6. Department of Chemistry, Bilkent University, Ankara, 06800, Turkey;7. Department of Physics, Bilkent University, Ankara, 06800, Turkey;1. Eskisehir Technical University, Faculty of Science, Department of Physics, Yunusemre Campus, 26470 Tepebasi, Eskisehir, Turkey;2. Central Research Laboratory, Eskisehir Osmangazi University, Eskisehir, Turkey;1. School of Materials Science and Engineering, Hebei University of Technology, And Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, Tianjin, 300130, China;2. Key Laboratory of Colloid and Interface Chemistry of Ministry of Education, And School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, Shandong, China;3. Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Aarhus C, DK, 8000, Denmark |
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| Abstract: | It is imminently to seek for high energy density in addition to a sensational lifetime of lithium-ion batteries (LIBs) to meet growing requisition in the energy storage application. Anode containing metal oxide composite is being thoroughly investigated for their higher capacity than that of the commercial graphite. A multiporous core-shell structured metal oxide composite anode possessing the excellent capacity and superb lifespan for LIBs is designed. In detail, metal oxide (i.e., MnO) is encapsulated in N-doped carbon shell (MnO@N–C) via coprecipitation-annealing technique. During annealing, abundant void space among MnO cores/between MnO cores and N–C shells is obtained. This space can efficaciously buffer volume changes of MnO upon cycles. Benefiting from the unique structure and heteroatom doping, the capacity of MnO@N–C microcube anode exhibits 576 mAh g?1 at 5 A g?1 with an ultra-long lifespan more than 3500 cycles. The connection between the electrode characteristics and structure is concurrently examined by adopting kinetic analysis. Finally, a full lithium-ion battery is presented, applying the MnO@N–C (anode) and Nick-rich layered oxide (cathode). It is believed that structural designing with heteroatom doping can be utilized in vaster fields for superior capabilities. |
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| Keywords: | Metal oxides Lithium-ion batteries MnO Core-shell structure N-doped carbon |
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