Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7990971 | Journal of Alloys and Compounds | 2018 | 8 Pages |
Abstract
A Co3O4 coating is formed on the surface of LiNi0.5Mn1.5O4 particles via an ethanol mediated precipitation method. The existence of the uniform Co3O4 coating is clearly observed by scanning electron microscopy and transmission electron microscopy. The results of electrochemical performance testing prove that the Co3O4 coating can greatly enhance the cycling stability and rate performance of LiNi0.5Mn1.5O4. The optimal sample 5% Co3O4-coated LiNi0.5Mn1.5O4 delivers a discharge capacity 126â¯mAh gâ1 at 1â¯C rate with a capacity retention 96.8% after 300 cycles and a high discharge capacity 97.5â¯mAh gâ1 at 10â¯C rate. The causes to the improvement are discussed based on elemental analysis, X-ray photoelectron spectroscopy and electrochemical impedance spectroscopy.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Miao-Miao Deng, Zhong-Feng Tang, Yu Shao, Xiao-Dong He, Zhao-Yin Wen, Chun-Hua Chen,