Effect of Flow-rate Induced Cation Mixing and Particle Size Tuning on the Structure and Electrochemical Properties of LiNi0.8Co0.1Mn0.1O2 Synthesized by Spray Drying  

作　　者：LIN Chang-Xin ZHNAG Xiang-Xin LIU Yong-Chuan CHEN Su-Jing WANG Wei ZHANG Yi-Ning 林长新;张祥昕;刘永川;陈素晶;王维;张易宁(College of Chemistry,Fuzhou University,Fuzhou 350108,China;Key Laboratory of Optoelectronic Materials Chemistry and Physics,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]College of Chemistry,Fuzhou University,Fuzhou 350108,China [2]Key Laboratory of Optoelectronic Materials Chemistry and Physics,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China [3]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Journal of Structural Chemistry》2020年第1期164-173,6,共11页结构化学（英文）

基　　金：Supported by the National Natural Science Foundation of China(No.51602310);Fujian Provincial Department of Science and Technology(2019T3017);the DNL Cooperation Fund,CAS(DNL180308)。

摘　　要：Lithium ion battery cathode material LiNi0.8Co0.1Mn0.1O2(NCM811)was synthe-sized via a spray drying method.The effect of different spray drying flow-rates(200,250,300,and 400 mL·min^-1)on the structural and electrochemical properties of NCM811 are investigated.We find that the contents of Ni,Co,and Mn in the NCM811 cathode materials do not change significantly with the changing flow-rate,but the lattice parameter and morphology of the materials are significantly affected.Under the optimal spray drying flow-rate(250 mL·min^-1),the obtained NCM811 cathode(250NCM811)exhibits the best crystallinity,with the highest ratio of I(003)/I(104)in the XRD pattern.SEM images reveal the spherical morphology of 250NCM811 and the average diameter of about 5 mm.The results of electrochemical test show that the reversible capacity of 250NCM811 reaches 210 mA·g^-1 at 0.2 C(1 C=280 mA·g^-1).After 100 charge-discharge cycles at 1 C,the battery retains more than 94%of its initial capacity.Overall,spray drying flow-rate demonstrates great effect on the electrochemical properties of NCM811.

关 键 词：lithium ion battery nickel-rich CATHODE material SPRAY DRYING SPRAY DRYING FLOW-RATE CATHODE materials 

分 类 号：TQ131.11[化学工程—无机化工] TM912[电气工程—电力电子与电力传动]