What are the important characteristics of lithium battery cathode materials?

Important features of lithium battery cathode materials: 1. Lithium cobalt oxide Lithium cobalt oxide is the first to be commercialized due to its simple processing technology and stable electrochemical performance. At the same time, because lithium cobalt oxide has the advantages of high working voltage, stable charging and discharging voltage, suitable for high current charging and discharging, high specific energy, and good cycle performance, it has important applications in the field of small rechargeable batteries. The disadvantage of lithium cobalt oxide battery cathode material is that it is expensive, and the actual specific capacity is only about 50% of its theoretical capacity of 274mAh/g; the cycle life of lithium cobalt oxide has reached 1000 times, but it still needs to be further improved; in addition, cobalt acid Lithium has poor overcharge resistance, and its specific capacity decreases rapidly at higher charging voltages. 2. Ternary materials In recent years, the layered lithium-inserting multiple transition metal composite cathode materials have developed rapidly, especially the new transition metal lithium-intercalating oxide composite materials containing three elements of cobalt, nickel and manganese. 3. Compared with lithium cobalt oxide and lithium nickel oxide, lithium manganate battery has the advantages of good safety, good overcharge resistance, abundant raw material manganese resources, low price and non-toxicity, and it is very promising. A kind of cathode material. The disadvantage of using layered lithium manganate as a positive electrode material for lithium batteries is that although the capacity is high, it is unstable at high temperatures, and it is easy to transform into a spinel structure during charge and discharge, resulting in excessive capacity decay. The use of lithium manganate in the Chinese market is also importantly positioned in the field of small batteries, which cannot be used in high-end fields, let alone completely replace the position of lithium cobalt oxide materials in small lithium batteries. 4. Lithium iron phosphate With the development of power lithium-ion batteries, most domestic manufacturers tend to use lithium iron phosphate materials. It is a new type of cathode material for lithium batteries. This type of material has the characteristics of high energy density, low price, excellent safety, etc., and is especially suitable for power lithium-ion batteries. Due to the high threshold of lithium iron phosphate processing technology, it is difficult for most manufacturers to guarantee the stability of their products during batch processing. Its disadvantage is that the resistivity is relatively large, and the utilization rate of electrode material is low. 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 correct maintenance methods for lithium batteries?