废旧隔膜衍生碳负极的电化学储锂性能  

Li-storage Performances of Carbon Anode Derived from Waste Separator Film

作　　者：刘显茜[1] 邹涛 李栋栋[2] 侯宏英[2] 兰建 代志鹏[2] 余成义[2] LIU Xianxi;ZOU Tao;LI Dongdong;HOU Hongying;LAN Jian;DAI Zhipeng;YU Chengyi(Faculty of Mechanical and Electrical Engineering,Kunming University of Science and Technology,Kunming 650093,China;Faculty of Material Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]昆明理工大学机电工程学院,昆明650093 [2]昆明理工大学材料科学与工程学院,昆明650093

出　　处：《人工晶体学报》2020年第1期109-113,共5页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51566006,51363011);教育部第46批留学归国科研启动基金资助项目(6488-20130039);云南省第十九批学术带头人资助项目;昆明理工大学学科方向团队经费资助项目(14078311)

摘　　要：以废隔膜为前体,通过一步热解碳化制备碳负极材料,考察了温度和时间对碳化产物的影响,并研究了碳负极材料的电化学储锂性能。结果表明,废隔膜的最佳碳化温度为420℃,碳化时间为120 min;用作锂离子电池负极材料时,在50 m A/g低电流密度充/放电时的可逆放电比容量高达543.8 m Ah/g;即使在高电流密度2000 m A/g循环1000圈后,可逆放电比容量仍可稳定在125.0 m Ah/g左右,表现了良好的电化学储锂性能。该研究结果不仅有助于缓解废旧隔膜对环境产生的危害,而且能充分发挥废弃资源中的利用价值、降低电极材料的制备成本。Carbon anode materials were extracted by one step pyrolysis carbonization of waste separator films,then the effects of the temperature and the time on the carbonization products were also investigat.The results suggest that the optimized temperature and time were 420℃and 120 min during the pyrolysis carbonization of the waste separator films,respectively.As the anode in lithium ion battery,the reversible discharge specific capacity of carbon anode was as high as 543.8 m Ah/g at low current density of 50 m A/g;even cycling at high current density of 2000 m A/g for 1000 cycles,the reversible discharge specific capacity could remain 125.0 m Ah/g,indicating satisfactory electrochemical Li-storage performances.These results would not only facilitate to alleviate the harm of waste separator film to the environment but also make full use the utilization value of waste resource and reduce the preparation cost of the electrode materials.

关 键 词：废隔膜 热解碳化 碳负极材料 锂离子电池 循环经济 

分 类 号：O646[理学—物理化学]