Effect of LiCoO2 coating on the electrochemical performance of LiMn0.9Co0.1O2 cathode materials for Li-ion batteries
Layer-structured LiMn0.9Co0.1O2 cathode materials for lithium-ion batteries were synthesized by ion exchange method. A layer of LiCoO2 was coated on the surface of the as-prepared LiMn0.9Co0.1O2 powder via melting impregnation method. The structure and morphology of the powders were characterized by means of x-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The electrochemical properties of the cathode materials were investigated using a half-cell in a potential range of 2.0-4.5V versus Li/Li+. The LiMn0.9Co0.1O2 coated with 7wt.％ of LiCoO2 exhibited good electrochemical properties with a discharge capacity of 158mAhg-1 and 89％ charge retention after 50 cycles.
X T Chen J P Tu Y Z Yang H M Wu J Y Xiang
Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
国际会议
第二届功能原料国际研讨会(The 2rd International Symposium on Functional Materials)
杭州
英文
49-52
2007-05-16（万方平台首次上网日期，不代表论文的发表时间）