Introduction to the use of ceramic separators for lithium batteries

Lithium battery ceramic separator is one of the four key materials of lithium battery. The performance of the separator determines the interface structure and internal resistance of the battery, which directly affects the battery's capacity, cycle and safety performance. The excellent performance of the separator can improve the overall performance of the battery. Has important uses. The important purpose of the lithium battery ceramic separator is to separate the positive and negative electrodes of the battery to prevent the two poles from contacting and short-circuit. In addition, it also has the function of allowing electrolyte ions to pass through. In addition, since the electrolyte is an organic solvent, the separator must also be resistant to organic solvents. The inside of the porous structure of the ceramic separator of the lithium battery can store and retain the electrolyte to achieve lithium ion conductivity. The ion conductivity of the lithium battery separator is directly related to the overall performance of the battery. Its use to isolate the positive and negative electrodes enables the battery to limit the increase in current when the battery is overcharged or the temperature rises, and prevents the battery from short-circuiting and causing an explosion. Hole self-closing protection purpose, for the purpose of safety protection for battery users and equipment. The cost of lithium battery separators accounts for about 1/3 of the battery cost. The performance of the ceramic diaphragm determines the interface structure and internal resistance of the battery, which directly affects the capacity, cycle performance and safety performance of the battery. The excellent performance of the diaphragm has an important purpose to improve the overall performance of the battery. At present, 60% to 70% of the diaphragm market mainly adopts the wet biaxial stretching process, because the wet biaxial stretching is more evenly balanced in the longitudinal and transverse directions. Moreover, the wet method is mainly used for high-end diaphragms, and the dry method is used for low-end products. 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: Comparison of important differences between lithium titanate battery and lithium iron phosphate battery pack