基于石墨烯改性的Fe-Si@C/石墨烯复合负极材料

doi:10.11896/cldb.18080013

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Abstract Graphene and amorphous carbon coated Fe-Si@C/graphene anode composite was prepared by mechanical milling and high temperature pyrolysis, using commercial Fe-Si and asphalt as raw materials, adding graphene as conductive agent. In contrast, Fe-Si@C/CNTs, Fe-Si@C and Fe-Si were prepared in the same way in order to analyze the electrochemical property differences of each composite. The phase composition, morphology and electrochemical performance of the composites were detected by X-ray diffractometer (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), energy disperse spectroscopy (EDS) and constant current charge-discharge test. The results reveal that the reversible capacity of Fe-Si@C/graphene has been effectively improved and it exhibits superior cyclability and rate performance. It’s initial discharge specific capacity is 916.3 mAh/g and the initial Coulombic efficiency is 82.4%. What’s more, it’s specific capacity remains above 600 mAh/g after 100 cycles at a current density of 200 mA/g.

Key words： lithium ion battery Fe-Si alloy graphene anode material carbon coating

Published: 31 July 2019

CLC number:

TM912.9

Fund:This work was financially supported by the Natural Science Foundation of Guangdong Province (2014A030308015), the Scientific and Technological Plan of Guangdong Province (2015B010116002, 2017A070701022) and GDAS’ Project of Science and Technology Development (2017GDASCX-0110, 2018GDASCX- 0110).

About author:: Cheng Cheng is a graduate student of Kunming University of Science and Technology, majoring in materials engineering. From July 2017 to June 2019, he was co-educated and learned at the Guangdong Research Institute of Rare Metal, focusing on the research of lithium ion battery materials.
程成,材料工程专业,昆明理工大学硕士研究生。2017年7月至2019年6月在广东省稀有金属研究所联合培养学习,主要从事锂离子电池材料研究。

Hezhong Pei is an associate professor of Kunming University of Science and Technology. He graduated from the Materials Department of Beijing University of Aeronautics and Astronautics in 1988 with a master’s degree. From 1988 to 1994, he worked in the 59th Research Institute of Chongqing Ordnance Industry, engaged in the corrosion mechanism and surface enginee-ring of metal materials. Since 1994 he has taught at Kunming University of Science and Technology. He is mainly engaged in corrosion theory, surface technology, electrochemical theory and applied research. In recent years, he has published more than 30 papers and patents, including one accepting patent.
裴和中,昆明理工大学,工学博士,副教授。1988年毕业于北京航空航天大学材料系,获工学硕士学位。1988年—1994年在重庆兵器工业第59研究所工作,从事金属材料的腐蚀机理以及表面工程研究。1994年至今在昆明理工大学任教。主要从事腐蚀理论、表面技术、电化学理论及应用研究。近年发表论文及专利30余篇,包括授权专利一项。

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	CHENG Cheng
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Cite this article:

CHENG Cheng,XIAO Fangming,WANG Ying, et al. Graphene Modified Fe-Si@C/Graphene Composite Anode Material[J]. Materials Reports, 2019, 33(18): 3005-3011.

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http://www.mater-rep.com/EN/10.11896/cldb.18080013 OR http://www.mater-rep.com/EN/Y2019/V33/I18/3005

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