In recent years, ternary nickel-rich layered oxides have gradually replaced traditional binary cathode materials in the lithium-ion battery market due to their advantages of high energy density and environmental protection. However, their structural instability of cathode materials has seriously affected the cycle performance of the battery. In order to optimize the internal structure of LiNiCoMnO(NCM523), the modified LiNiCoMnOwas prepared bydoping Na and Cl wet grinding solid phase method. After 80 cycles at 1 C, the capacity retention rate was 80.91%, which was higher than that of LiNiCoMnOby 70.00%. Scanning electron microscopy showed that the surface corrosion of LiNiCoMnOwas effectively alleviated by Na and Cl co-doping. In addition, the band structure, state density and volume changes were obtained by simulation. The results show that the impedance, capacity and capacity retention data are very compatible with the simulation results. Therefore, Na and Cl doping can effectively optimize the internal structure of LiNiCoMnOand improve its electrochemical performance. The combination of simulation and experiment provides a new approach for the modification of ternary cathode materials.

Download full-text PDF

Source
http://dx.doi.org/10.1088/1361-6528/acda39DOI Listing

Publication Analysis

Top Keywords

cathode materials
12
lithium-ion battery
8
optimize internal
8
internal structure
8
capacity retention
8
co-doping modified
4
modified linicomnoas
4
cathode
4
linicomnoas cathode
4
cathode lithium-ion
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!