多孔镍钴铝三元正极材料的制备研究  

Preparation and research of porous NCA ternary cathode materials

作　　者：董少强[1,2] 谢正伟[1,2] 李想[1,2] 汪沣 瞿美臻[1] 

机构地区：[1]中国科学院成都有机化学研究所,四川成都610041 [2]中国科学院大学,北京100049

出　　处：《电源技术》2015年第8期1603-1604,1638,共3页Chinese Journal of Power Sources

基　　金：国家科学技术部重大科学研究计划项目课题(2011CB932604);青年"973"课题资助项目(2013CB934700)

摘　　要：LiNi0.8Co0.15Al0.05O2作为一种锂离子电池正极材料,因容量高、循环性能好等优点而备受关注,但较低的倍率性能限制了其大规模应用。利用共沉淀法,在制备镍钴铝前驱体的过程中加入了一定量的碳纳米管分散液,在混锂高温焙烧过程中将碳纳米管部分除去,通过对材料进行扫描电镜(SEM)、算比表面积(BET)和能量散射光谱(EDS)等测试发现,碳纳米管的烧除在材料颗粒中留下了一定量的孔洞,同时在颗粒的内部还残留了一定量的碳纳米管。充放电测试显示,在5C下的放电比容量提升了14.73%。As a kind of Li-ion battery cathode material, LiNi0.8Co0.15Al0.05O2 has been widely studied because of the high capacity and good cycle performance, but the poor rate capability limits its large-scale application. A certain amount of carbon nanotubes dispersion was added in the preparation of NCA precursor by using coprecipitation method, then part of the carbon nanotubes was burnt off in the high temperature roasting process. Through BET, SEM and EDS tests, the burning off of the carbon nanotubes creates some holes in the material, and there are amount of residual carbon nanotubes inside the particle. The charge and discharge tests show the discharge specific capacity increases by 14.73% at 5 C.

关 键 词：LiNi0.8Co0.15Al0.05O2 正极材料 多孔 碳纳米管 

分 类 号：TM912[电气工程—电力电子与电力传动]