What are the common cathode materials for lithium batteries?

Common cathode materials for lithium batteries With the continuous development of lithium batteries, the application fields are gradually expanding. The use of cathode materials has changed from singularity to diversification, including: olivine-type lithium iron phosphate, Layered lithium cobalt oxide, spinel lithium manganate, etc., realize the coexistence of multiple materials. Among the cathode materials for lithium batteries, the most commonly used materials are lithium cobalt oxide, lithium manganate, lithium iron phosphate and ternary materials (a polymer of nickel, cobalt and manganese). 1. Lithium cobaltate was used as a cathode material for the earliest time, and it is still the mainstream cathode material in consumer electronic products. Compared with other cathode materials, it can be seen that the voltage of lithium cobalt oxide is higher during the working process, and the voltage runs more smoothly during charging or discharging, which can meet the requirements of large currents, has strong cycle performance, and has higher conductivity. And the process of lithium battery is relatively stable. 2. The ternary cathode material has a more significant ternary synergistic effect. Compared with lithium cobalt oxide, it can be seen that there are greater advantages in thermal stability, and the processing cost is relatively low, which can be the best for lithium cobalt oxide Replace material. However, its density is low and the cycle performance needs to be improved. In this regard, it can be adjusted by improving the synthesis process and ion doping. 3. Lithium iron phosphate has good cycle performance and thermal stability in terms of charging and discharging, and has a strong safety guarantee during use, and the material is green and environmentally friendly, and will not cause serious damage to the environment. At the same time, the price is also It is relatively inexpensive and is considered by the battery industry in my country to be the best material for processing large-scale battery modules. 4. Lithium manganate has strong safety and resistance to overcharge in application. As my country is rich in manganese resources, the price is relatively low, pollution to the environment is small, non-toxic and harmless, and industrial preparation and operation are relatively simple. However, in the process of charging or discharging, due to the unstable spinel structure, the Jahn-Teller effect is prone to occur, coupled with the dissolution of manganese at high temperatures, it is easy to reduce the capacity of lithium batteries, so its application is also greatly restricted. . Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the factors that limit the depth of discharge of lithium batteries?