Can ceramic-coated lithium battery separators improve battery safety?

Ceramic-coated lithium battery separator improves battery safety performance. Although most battery cell companies are paying attention to ceramic-coated diaphragms, there are still too few companies that can really apply them in large quantities. As a power lithium-ion battery, the safety of lithium batteries has always been one of the most important requirements. The diaphragm is equivalent to the core of battery safety. Its market is high-voltage batteries and power lithium-ion batteries. The Importance of Ceramic Coated Separator for Lithium Batteries The important purpose of the separator is to separate the positive and negative electrodes of the lithium battery to prevent short circuits due to contact between the two electrodes. In addition, it has the function of allowing electrolyte ions to pass through. The performance of the diaphragm determines the interface structure and internal resistance of the battery, and directly affects the battery's capacity, cycle, and safety performance. The performance of the diaphragm determines the internal resistance and interface structure of the lithium battery, which in turn determines the battery capacity, safety performance, charge-discharge density and cycle performance. Ceramic-coated special diaphragm: PP, PE or multilayer composite diaphragm is used as the substrate, and the surface is coated with a layer of nano-aluminum oxide material, which is treated by a special process and adheres tightly to the substrate. Significantly improve the high temperature resistance and safety of lithium batteries. The ceramic-coated special diaphragm is particularly suitable for power lithium-ion batteries. At present, solving the problem of the safety performance of lithium batteries has become an important development direction for separators. Lithium battery separators are battery supporting materials encouraged by the country. The 2008 National 863 Program listed the key technology research of low-cost lithium battery separators as a key industrialization-oriented project. From the perspective of the safety of lithium batteries, more and more battery cell companies in my country have begun to focus on the field of ceramic-coated diaphragms. However, the application of ceramic coated diaphragms in my country's lithium battery market is not large, and there are not many companies that can make diaphragms with good consistency and stability. From the perspective of the safety of lithium batteries, more and more battery cell companies in my country have begun to focus on the field of ceramic-coated diaphragms. However, the application of ceramic-coated diaphragms in my country's lithium battery market is not large, and there are not many companies that can produce diaphragms with good consistency and stability. Today the author is going to talk about the safety performance of the ceramic-coated separator for lithium batteries. Ceramic-coated lithium battery separators improve battery safety performance. Ceramic-coated lithium battery separators will have a wide range of applications. It is an important means to solve the safety problems of lithium batteries and is also a direction for the development of lithium battery separators in the future. Solving the safety issues of lithium batteries has become an important development direction for the future of separators, and coated separators are an important choice to meet the safety requirements of lithium batteries. After ceramic coating, the diaphragm basically covers 8%-10% of the pores, and can withstand a high temperature of 240°C. Through the puncture test done by the customer, the safety of the ceramic diaphragm is indeed much better than that of the ordinary diaphragm used on the lithium battery. To ensure the safety of lithium batteries, battery factories in South Korea have basically begun to use ceramic-coated separators. South Korea's SK Energy Storage Innovation Business Development Director JIN-YoungCHOI said at the third high-tech lithium battery industry summit at the beginning of this year that South Korea has begun to popularize and promote the application of ceramic coated diaphragms. Ceramic diaphragm is to coat nano-scale ceramic particles on the diaphragm. Its main purpose is to improve the heat shrinkage resistance of the diaphragm and prevent large-area short circuit caused by the shrinkage of the diaphragm. In addition, the low thermal conductivity of ceramics prevents some thermal runaway points in the lithium battery from expanding and forming an overall thermal runaway. Generally, it can withstand high temperature around 200℃. The important market for ceramic coating is high-voltage batteries and power lithium-ion batteries. There are two development directions: one is to coat alumina, represented by LG, using dip coating; the other is to make a layer of aramid on the surface, represented by Japan's Teijin. Ceramic diaphragm is a kind of nano-scale ceramic particles, which can be coated on the battery diaphragm to improve the heat resistance and strength of the lithium battery diaphragm and prevent large-area short circuit caused by the shrinkage of the diaphragm. In addition, the low thermal conductivity of ceramics prevents some thermal runaway points in the battery from expanding and forming an overall thermal runaway. It can withstand high temperatures around 200°C and is very suitable for power lithium-ion batteries. Since the performance of the diaphragm directly affects the battery's internal resistance, discharge capacity, cycle life, and safety performance of the lithium battery, the manufacturing of lithium batteries has extremely high requirements for the consistency of diaphragm material 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: Why is the price of iron-lithium battery UPS power supply more expensive than lead-acid batteries?