Ternary nickel cobalt manganese cathode materials are one of the most important cathode materials of lithium ion batteries. Ni-Co-Mn ternary materials have much higher power density than LiFePO₄ and lower cost than LiCoO₂, so it is becoming the dominant cathode material for power battery. However, there are still some shortcomings of Ni-Co-Mn ternary materials, such as poor stability and rate performance. In recent years, great efforts have been made to improve the materials through exploring new synthesis method and modifying the materials via doping and coating techniques, and some progress has been achieved. In this paper, the latest progress on the synthesis, doping and coating of Ni-Co-Mn ternary materials are introduced. Furthermore, a perspective for the development tendency of Ni-Co-Mn ternary materials is also made.
Contents
1 Introduction
2 Research progress of preparation
2.1 Solid state method
2.2 Coprecipitation method
2.3 Sol-gel method
2.4 Template method
2.5 Hydrothermal method
3 Research progress of coating and doping
3.1 Coating
3.2 Doping
4 Conclusion