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材料导报  2019, Vol. 33 Issue (18): 3005-3011    https://doi.org/10.11896/cldb.18080013
  无机非金属及其复合材料 |
基于石墨烯改性的Fe-Si@C/石墨烯复合负极材料
程成1, 2, 3, 肖方明2, 3, 王英2, 3, 唐仁衡2, 3, 裴和中1
1 昆明理工大学材料科学与工程学院,昆明 650093
2 广东省稀土开发及应用重点实验室,广州 510650
3 广东省稀有金属研究所,广州 510650
Graphene Modified Fe-Si@C/Graphene Composite Anode Material
CHENG Cheng1,2,3, XIAO Fangming2,3, WANG Ying2,3, TANG Renheng2,3, PEI Hezhong1
School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093
2 Guangdong Province Key Laboratory of Rare Earth Development and Application, Guangzhou 510650
3 Guangdong Research Institute of Rare Metals, Guangzhou 510650
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摘要 以商业Fe-Si、沥青作为原料,石墨烯作为导电剂,采用机械球磨和高温热解制得具有石墨烯和无定形碳包覆结构的Fe-Si@C/石墨烯复合负极材料。将以同样方法制备添加碳纳米管(CNTs)的Fe-Si@C/CNTs、不添加导电剂的Fe-Si@C及原料Fe-Si作为对比,分析比较各负极材料的电化学性能。利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线能谱仪(EDS)和恒流充放电测试仪对复合材料的物相、颗粒形貌及电化学性能进行表征。结果表明,采用Fe-Si@C/石墨烯制备的电池的可逆容量得到了有效提升,同时表现出优异的循环稳定性和倍率性能,其首次放电比容量为916.3 mAh/g,库仑效率为82.4%,200 mA/g的电流密度下循环100周后放电容量稳定在600 mAh/g左右。
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程成
肖方明
王英
唐仁衡
裴和中
关键词:  锂离子电池  Fe-Si合金  石墨烯  负极材料  碳包覆    
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
               出版日期:  2019-09-25      发布日期:  2019-07-31
ZTFLH:  TM912.9  
基金资助: 广东省自然科学基金(2014A030308015);广东省省级科技计划项目(2015B010116002;2017A070701022);广东省科学院实施创新驱动发展能力建设专项(2017GDASCX-0110;2018GDASCX-0110)
通讯作者:  peihezhong@vip.qq.com   
作者简介:  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。
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。
引用本文:    
程成, 肖方明, 王英, 唐仁衡, 裴和中. 基于石墨烯改性的Fe-Si@C/石墨烯复合负极材料[J]. 材料导报, 2019, 33(18): 3005-3011.
CHENG Cheng, XIAO Fangming, WANG Ying, TANG Renheng, PEI Hezhong. Graphene Modified Fe-Si@C/Graphene Composite Anode Material. Materials Reports, 2019, 33(18): 3005-3011.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.18080013  或          http://www.mater-rep.com/CN/Y2019/V33/I18/3005
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