一步固相法合成Li_(1.2)Ni_(0.13)Co_(0.13)Mn_(0.54)O_2正极材料的工艺优化  

Optimal Synthesis Techniques of LiNi_(0.5)Co_(0.2)Mn_(0.3)O_2 Cathode Materials Prepared by One-step Solid-state Reaction

作　　者：郅晓科[1] 叶学海[1] 何爱珍[1] 赵桢[1] 王旭阳[1] 时洁[1] 章甦[1] 

机构地区：[1]中海油天津化工研究设计院,天津300131

出　　处：《广州化工》2013年第7期86-88,106,共4页GuangZhou Chemical Industry

摘　　要：以球形前驱体Ni0.13Co0.13Mn0.54(OH)0.8以及Li2CO3为原料,用正交实验方法优化一步固相法制备Li1.2Ni0.133Co0.133Mn0.534O2正极材料的合成工艺,考察焙烧温度、焙烧时间以及锂盐过量分数等因素对材料电化学性能的影响,得到最佳工艺组合:焙烧温度850℃;焙烧时间18 h;锂盐过量分数2%。按最佳工艺合成的样品0.2 C、1 C首次放电容量分别为262.6 mAh/g和234.6mAh/g,且表现出良好的循环稳定性。The orthogonal experiment was designed to determine the optimal synthesis techniques of Li1. 2Ni0. 133Co0. 133 Mn0. 534O2 cathode materials prepared by one -step solid -state reaction using Ni0. 13 Co0. 13 Mn0. 54 （OH）0. 8 and Li2CO3 as raw material s. The effects of calcinations temperature, calcination time, and the excessive percentage of lithium salt on the electrochemical performance of Li1.2Ni0.13Co0.13Mn0.54O2 were systematically investigated to optimize the synthesis techniques. The results showed that the optimal techniques were as follows： calcination temperature 850 ℃, calcination time 18 h, the excessive lithium salt 2%. The asprepared optimal sample showed first discharge capacities of 262. 6 mAh/g and 234. 6 mAh/g at 0.2 C and 1 C rate, respectively, with good cycling stability.

关 键 词：一步固相法 正极材料 Li1.2Ni0.133Co0.133Mn0.534O2 正交实验 工艺优化 

分 类 号：TQ152[化学工程—电化学工业]