稀土掺杂锂离子电池正极材料锂镍钴氧的研究  

Research on the Li-Ni-Co-O Oxides Doped with Rare Earth Element of Lanthanum as Lithium-Ion Battery Cathode Material

作　　者：桂阳海[1] 胡国荣[2] 赵恒勤[2] 秦庆伟[2] 

机构地区：[1]中国地质大学研究生院,武汉430074 [2]中南大学冶金科学与工程系,长沙410083

出　　处：《矿产保护与利用》2003年第2期41-44,共4页Conservation and Utilization of Mineral Resources

摘　　要：采用机械合金(MechanicalAlloying-MA)技术,固相掺杂稀土元素镧,在氧气气氛中高温焙烧合成锂离子电池正极材料锂镍钴氧化物,对所得化合物进行了稀土掺杂量及电化学性能的研究;同时也进行了相关的XRD、SEM、CV表征。得到性能比较优良的LiNi0.80Co0.2-xLaxO2(x=0.03)化合物。其首次充电比容量达168mA·h/g,放电比容量达152mA·h/g,进行10次循环以后,放电比容量仍然有143mA·h/g。The MA (Mechanical Alloying) technology was employed to synthesize the Li-Ni-Co-O oxides doped with rare earth element of Lanthanum as lithium-ion battery cathode material via solid-phase sintering in O2 atmosphere. Experiments of doping ratio and electrochemistry performance as well as characteristics of XRD, SEM and CV for Li-Ni-Co-0 oxides were carried out. The compound LiNi0.80Co0.2-xLaxO2(x=0.03) obtained exhibited a better performance whose initial charge/discharge specific capacity reached 168 mA·h/g and 152 mA·h/g respectively. After 10 cycles, the discharge capacity maintains 143 mA·h/g.

关 键 词：掺杂 稀土元素 锂离子电池 正极材料 锂镍钴氧化物 机械合金技术(MechanicalAlloying—MA)技术 MechanicalAlloying-MA技术 

分 类 号：TM912[电气工程—电力电子与电力传动]