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酚醛树脂包覆石墨化针状焦用作锂离子电池负极材料的研究
引用本文:叶冉,詹亮,张秀云,刘春法,刘小军,凌立成.酚醛树脂包覆石墨化针状焦用作锂离子电池负极材料的研究[J].医学教育探索,2010(4):518-522.
作者姓名:叶冉  詹亮  张秀云  刘春法  刘小军  凌立成
作者单位:华东理工大学化学工程联合国家重点实验室,上海 200237;华东理工大学化学工程联合国家重点实验室,上海 200237;上海宝钢化工有限公司,上海 200942;上海宝钢化工有限公司,上海 200942;华东理工大学化学工程联合国家重点实验室,上海 200237;华东理工大学化学工程联合国家重点实验室,上海 200237
基金项目:国家863重点资助项目(2008AA062302);国家自然科学基金资助项目(20806024,50672025,5073003);中国博士点基金资助项目(20070251008);上海市国际合作资助项目(08160704000);上海市大学生创新计划资助项目(yx023710207)
摘    要:通过对石墨化针状焦进行酚醛树脂包覆,提高其用作锂离子电池负极材料时的首次库仑效率和循环性能。结合X射线衍射(XRD)、扫描电子显微技术(SEM)等分析手段研究发现:未包覆的石墨化针状焦的首次充电容量和首次库仑效率分别为269 mA·h/g和55.0%;而经过w=10%酚醛树脂包覆的石墨化针状焦,其首次充电容量和首次库仑效率分别提高到327 mA·h/g和69.9%,且经20次充放电后的充电容量能稳定在299 mA·h/g,循环效率接近100%,表明酚醛树脂包覆能较好地改善石墨化针状焦的电极性能。

关 键 词:锂离子电池    针状焦    酚醛树脂

Phenol Formaldehyde Resin Coated Graphited Needle Coke as Cathode for Lithium Ion Batteries
YE Ran,ZHAN Liang,ZHANG Xiu yun,LIU Chun f,LIU Xiao jun and LING Li cheng.Phenol Formaldehyde Resin Coated Graphited Needle Coke as Cathode for Lithium Ion Batteries[J].Researches in Medical Education,2010(4):518-522.
Authors:YE Ran  ZHAN Liang  ZHANG Xiu yun  LIU Chun f  LIU Xiao jun and LING Li cheng
Affiliation:State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;Baosteel Group Shanghai Chemical Co., Ltd, Shanghai 200942, China;Baosteel Group Shanghai Chemical Co., Ltd, Shanghai 200942, China;State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
Abstract:In order to improve the first Coulomb efficiency and reversible capacity of graphited needle coke as cathode for lithium ion batteries, the surface of needle coke was coated by phenol formaldehyde resin. According to the analysis of XRD, SEM and relative electrochemical performances, the first reversible capacity and Coulomb efficiency of coke as cathode were increased from 269 mA·h/g and 55.0% without coating to 327 mA·h/g and 69.9% coating with 10% resin, and the charge capacity remained at 299 mA·h/g and the cycle efficiency was close 100% even after 20 cycles of charge/discharge. It means that the coating method can improve the electrochemical performance of graphited needle coke as cathode for lithium ion batteries.
Keywords:
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