What are the effects of cathode materials on the performance of lithium batteries?

The influence of cathode materials on the performance of lithium batteries 1. Cell energy density Each cathode material has its theoretical energy density. When a cathode material is selected, the upper limit of the cell energy density is selected. The amount design of the positive electrode material and the tap density during the production process also have an impact on the energy density of the finished battery cell. 2. The types of cathode materials with different cell power densities determine the general range of battery charge and discharge power. Some details of the material, as auxiliary factors, will also affect the power characteristics. For example, the stability of the crystal structure of the cathode material, particle size, doping atoms, carbon coating process, material preparation method, etc. The above factors ultimately affect the power density of lithium batteries by affecting the ability of the cathode material to accommodate lithium ions and the patency of the deintercalation and insertion channels. 3. There are many factors affecting the cycle life of the battery cell. Related to the positive electrode material, the important thing is the loss of the active material of the positive electrode material in the cycle, and the positive electrode containing lithium caused by the collapse of the material structure during the charging and discharging process. Attenuation of ion capacity. The impurity components in the cathode material, such as elemental iron and trivalent iron, will interact with the electrolyte, causing adverse side reactions or causing internal micro short circuits. In the cathode material of ternary lithium battery, the three metal elements of nickel, cobalt, and manganese (or aluminum) are indispensable. One more or less one will affect its final performance or fail to make a battery, but we can make it according to our own needs. , Properly adjust the mixing ratio of nickel, cobalt, and manganese (or aluminum) in the lithium battery to allow the lithium battery to exhibit different characteristics. The market share of ternary materials is gradually expanding, and the important driving force comes from the pursuit of auto mileage. To catch up or even surpass the endurance of fuel vehicles, electric vehicles must be equipped with as much electricity as possible in a limited space, which makes energy density especially important. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: How to replace the UPS battery with a lithium battery?