锂离子电池负极材料中间相炭微球的表面镀镍修饰研究  

Study of Ni-coated mesocarbon microbeads for Li-ion battery negative material

作　　者：王红强[1] 李庆余[1] 韦卉[1] 裴飞[1] 邓小成[1] 李新海[2] 

机构地区：[1]广西师范大学化学化工学院,桂林541004 [2]中南大学冶金科学与工程学院,长沙410083

出　　处：《化工新型材料》2006年第S1期48-51,共4页New Chemical Materials

摘　　要：采用化学镀的方法在石墨化中间相炭微球的表面镀覆金属镍,采用扫描电镜对镀覆后的炭微球进行了表面分析,采用X-射线衍射的方法对镀镍炭微球进行了物相分析,将镀覆后的中间相炭微球用于锂离子电池负极材料,并进行了不同倍率的充放电分析及交流阻抗研究。结果表明,在不使用活化剂和敏化剂的情况下,金属镍仍然能够沉积在炭微球的表面;炭微球的大电流放电性能大大提高,在2C放电电流下的放电容量提高了23%,镀镍后交换电流密度增大并且SEI膜电阻减小,炭微球的反应活性大大提高。Nickel was coated on the surface of graphitized Mesocarbon Microbeads(MCMBs) by electroless plating.The Ni-coated MCMBs were studied by SEM and XRD.The electrochemical performance of coated MCMBs has been studied as active anode material for lithium ion batteries.It is found that the rate performance of the carbon electrode was improved significantly.The coated MCMBs have reversible capacity 23% higher than uncoated MCMBs.The studies of electrochemical impedance spectroscopy(EIS) got the results of the incr...

关 键 词：中间相炭微球 负极材料 化学镀镍 交换电流密度 锂离子电池 

分 类 号：TM912[电气工程—电力电子与电力传动]