What are the uses of lithium battery positive and negative materials

1. The use of lithium battery negative electrode material The negative electrode active material of lithium battery is mainly carbon material. Its success lies in the replacement of lithium negative electrode with carbon negative electrode, so that during charge and discharge, the deposition and dissolution of lithium on the surface of the negative electrode becomes lithium on the surface of the negative electrode. The insertion and extraction of carbon particles reduces the possibility of lithium dendrite formation and greatly improves the safety of the battery, but this does not mean that there is no safety problem in the use of carbon anodes. The physical and chemical structure properties of the negative electrode active material have a decisive influence on the insertion and extraction of lithium ions. Using active materials that are easy to deintercalate, the structure of the active material changes little during charging and discharging cycles, and this small change is reversible, so there is Conducive to extending the charge and discharge cycle life. 2. Different types of cathode materials for lithium battery cathode materials determine the general range of battery charge and discharge power. For example, the stability of the crystal structure of the cathode material, particle size, doping atoms, carbon coating process, material preparation methods, 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. Each positive electrode material has its theoretical energy density. When a positive electrode material is selected, the upper limit of the energy density of the cell is selected. The amount design of the positive electrode material and the tap density in the production process also have an impact on the energy density of the finished battery cell. There are many factors that affect the cycle life of the battery. The positive electrode material is related to the loss of the active material of the positive electrode material in the cycle, and the deterioration of the positive electrode's ability to hold lithium ions caused by the collapse of the material structure during the charge and discharge process. 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. The development of lithium batteries has benefited from the development of positive and negative materials. As the use of lithium batteries continues to expand and people’s performance requirements for lithium batteries become more and more stringent, the requirements for the preparation of lithium battery positive and negative materials will become more and more demanding. High, this requires people to improve the performance of the existing positive and negative materials on the one hand, and on the other hand seek alternatives with more excellent safety performance and cycle performance. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.