Effects of LiAlO2 coating on electrochemical performance of single-crystal LiNi0.6Co0.2Mn0.2O2

2018 International Conference on Civil and Hydraulic Engineering

土木建筑工程;水利工程

Bai, Xue^1 ; Li, Wen^1 ; Zhang, Lihui^1 ; Liu, Zhenfa^1

Institute of Energy Resources, Hebei Academy of Sciences, Hebei Province, Shijiazhuang, 050081, China^1

关键词: Discharge capacities;    Electrochemical performance;    Electrode polarizations;    Galvanostatic charge discharges;    Layered Structures;    Rate capacity;    Solid state method;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/189/3/032050/pdf
DOI  :  10.1088/1755-1315/189/3/032050

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The LiAlO2-coated commercial single-crystal LiNi0.6Co0.2Mn0.2O2 were synthesized by a solid-state method. The structure and electrochemical performance of the prepared materials were investigated by X-ray diffraction, scanning electron microscopy and galvanostatic charge-discharge tests. After LiAlO2 coating, single-crystal LiNi0.6Co0.2Mn0.2O2 retains a well-developed layered structure and exhibits higher discharge capacities. The LiAlO2-coated LiNi0.6Co0.2Mn0.2O2 sample delivers higher discharge capacities of 185.1, 176.3, 167.3, 156.9, and 138.9 mAh g-1 at rates of 0.2C, 0.5C, 1C, 2C, and 5C, respectively. The results indicate that the LiAlO2 coating could reduce the electrode polarization and enhance the rate capacities.