低共熔混合锂盐合成Co和Al共掺杂的LiNiO_2  

Preparation of Co and Al coped LiNiO_2 cathode material by using eutectic mixed lithium salt with lower melting point

作　　者：常照荣[1] 齐霞[2] 吴锋[1] 汤宏伟[2] 王蒋亮[2] 

机构地区：[1]北京理工大学化工与环境学院,北京100080 [2]河南师范大学化学与环境科学学院,河南新乡453007

出　　处：《化学工程》2006年第12期50-53,共4页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(90206043)

摘　　要：在空气中,采用低共熔混合物L iNO3-L iOH为锂盐,制备了Co和A l共掺杂锂离子电池正极材料L iN i0.8Co0.15A l0.05O2。XRD分析表明,制得的正极材料具有完整的层状结构。电性能测试表明:在0.5 mA/cm2的放电电流密度和2.7—4.2 V的电压范围内,L iN i0.8Co0.15A l0.05O2首次放电比容量达147.6 mA.h/g,库仑效率达84.3%,第20次的放电比容量为133.8 mA.h/g。该合成新工艺,能制备出电化学性能良好的Co和A l共掺杂的L iN iO2正极材料。In air atmosphere, Co and Al doped cathode materials LiNi0.8CO0.15Al0.05O2 was prepared by using molten salt LiNO3-LiOH with lower melting point as lithium salt for lithium ion battery. XRD results show that the prepared cathode materials have perfect layer structure. Electrochemical property tests testified that for charge-discharge current density of 0.5 mA/cm^2 and voltage of 2.7 V and 4.2 V, the initial discharge specific capacity of prepared LiNi0.8CO0.15Al0.05O2 is 147.6 mA · h/g, and coulomb efficiency is 84.3%. The discharge specific capacity is 133.8 mA · h/g for 20th cycle. Co and Al doped cathode materials LiNiO2 with good electrochemical property can be prepared by this new technology.

关 键 词：锂离子电池 熔融盐 正极材料 

分 类 号：TM912[电气工程—电力电子与电力传动]