Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8011736 | Transactions of Nonferrous Metals Society of China | 2018 | 6 Pages |
Abstract
In order to confirm the optimal Li content of Li-rich Mn-based cathode materials (a fixed mole ratio of Mn to Ni to Co is 0.6:0.2:0.2), Li1+x(Mn0.6Ni0.2Co0.2)1-xO2 (x=0, 0.1, 0.2, 0.3) composites were obtained, which had a typical layered structure with and C2/m space group observed from X-ray powder diffraction (XRD). Electron microscopy micrograph (SEM) reveals that the particle sizes in the range of 0.4-1.1 μm increase with an increase of x value. Li1.2(Mn0.6Ni0.2Co0.2)0.8O2 sample delivers a larger initial discharge capacity of 275.7 mA·h/g at the current density of 20 mA/g in the potential range of 2.0-4.8 V, while Li1.1(Mn0.6Ni0.2Co0.2)0.9O2 shows a better cycle performance with a capacity retention of 93.8% at 0.2C after 50 cycles, showing better reaction kinetics of lithium ion insertion and extraction.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Cheng-chi PAN, Ying-chang YANG, Hong-shuai HOU, Ming-jun JING, Yi-rong ZHU, Wei-xin SONG, Xiao-bo JI,