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Sandwich-like mesoporous graphene@magnetite@carbon nanosheets for high-rate lithium ion batteries
Institution:1. The Institute of Biomaterial, College of Material and Energy, South China Agricultural University, Guangzhou, Guangdong 510642, China;2. Department of Chemistry, Kansas State University, Manhattan, KS 66506, United States;3. Guangxi Key Laboratory of Low Carbon Energy Materials, School of Chemistry & Chemical Engineering of Guangxi Normal University, Guilin 541004, China;1. Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, 510006, China;2. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, 381 Wushan Road, Tianhe District, Guangzhou, 510641, China;3. Shenzhen Yaya Zhixian Technology Co, Ltd, No. 2 Building, Tianan Cyber Park, Huanggang Road, Longcheng Subdistrict, Longgang District, Shenzhen, 18172, China;4. Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, College of Environment and Energy, South China University of Technology, Guangzhou, 510006, China;1. School of Chemical Engineering, Sichuan University, Chengdu 610065, PR China;2. School of Chemical Engineering of Guizhou Institute of Technology, Guiyang 550000, PR China;3. Center for Electrochemistry, Department of Chemistry, The University of Texas at Austin, USA;4. Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610065, PR China;5. School of Mechanical Engineering, Chengdu University, Chengdu, 610106, PR China;1. International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology of Ministry of Education, Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong Province, Institute of Microscale Optoeletronics, Shenzhen University, Shenzhen 518060, China;2. International Iberian Nanotechnology Laboratory (INL), Avenide Mestre Jose Veiga, 4715-330 Braga, Portugal;3. Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation, Department of Materials Science and Engineering, Huaibei Normal University, Huaibei 235000, China;4. School of Electrical Engineering and Automation, Wuhan University, Wuhan 430000, China;1. College of Chemistry and Chemical Engineering, Advanced Catalytic Engineering Research Center of the Ministry of Education, Hunan University, Changsha 410082, PR China;2. CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Shandong Key Laboratory of Coastal Environmental Processes, Research Center for Coastal Environment Engineering Technology of Shandong Province, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China;3. University of Chinese Academy of Sciences, Beijing 100049, PR China;4. College of Life Sciences, Hunan Normal University, Changsha 410081, PR China;5. College of Biology, Hunan University, Changsha 410082, PR China
Abstract:Sandwich-like mesoporous GS@Fe3O4@C nanosheets with a 2D nanoarchitecture have been successfully synthesized by one-step solvothermal treatment. Such type of 2D nanoarchitecture is made up of a number of Fe3O4 nanoparticles uniformly grown on a graphene sheet and an even amorphous carbon layer covering on their surface. The Li-cycling properties of GS@Fe3O4@C nanosheets have been evaluated by galvanostatic discharge-charge cycling and impedance spectroscopy. Results indicate that the GS@Fe3O4@C nanosheets with about 5 wt % of graphene content provides a very high discharge capacity of 913.2 mAh g−1 at a current densities of 200 mA g−1 after 100 cycles and reveals a stable discharge capacity of 483.2 mAh g−1 at a rate of 1600 mA g−1.
Keywords:Nanostructures  Composites  Chemical synthesis  Electrochemical properties  Energy storage
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