Performance characteristics of ceramic composite diaphragms for lithium batteries and analysis of the advantages of bolmstone for ceramic diaphragms

Performance characteristics of lithium battery ceramic composite diaphragm The lithium battery ceramic composite diaphragm realizes the performance complementarity between materials, and can meet the needs of new lithium batteries for high safety and high-power rapid charge and discharge. The ceramic diaphragm is based on PP, PE or multi-layer composite diaphragm, and the surface is coated with a layer of nano-aluminum oxide material. After a special process, it adheres tightly to the substrate. Significantly improve the high temperature resistance and safety of lithium batteries. It has the following performance characteristics: Lithium battery ceramic diaphragm.jpg1. The thermally stable ceramic material is distributed in the three-dimensional structure of the composite diaphragm to form a specific rigid framework. With its extremely high thermal stability, it can effectively prevent the diaphragm from being thermally out of control. Shrinkage and melting occur. 2. High safety The low thermal conductivity of ceramic materials can further prevent some thermal runaway points in the lithium battery from expanding and forming an overall thermal runaway, thereby improving the safety of the battery. 3. Good affinity The surface of the ceramic powder particles is distributed with a large number of lyophilic groups such as OH, which can increase the affinity of the composite diaphragm to the electrolyte, thereby improving the high-current charging and discharging performance of the lithium battery. 4. Improve the service life of the composite diaphragm. Ceramic materials are generally amphoteric oxides. The ceramic powder particles in the composite diaphragm can partially absorb impurities such as HF generated by the presence of trace water in the electrolyte, further improving the service life of the lithium battery. At present, relatively large-scale lithium battery manufacturers often require cell manufacturers to use ceramic coating films, which has also prompted many battery manufacturers and separator manufacturers to invest a lot of energy on ceramic coating research. But in fact, ordinary battery cell factories cannot afford the cost of high-end ceramic-coated diaphragms. At present, the market price of ceramic coated diaphragms on the market ranges from 8 yuan/square meter to 20 yuan/square meter, which mainly depends on the quality of the substrate. The advantages of the thin-moulded stone for the ceramic diaphragm of the lithium battery The thin-moulded stone for the ceramic diaphragm of the lithium battery has high purity, sub-micron crystal grains, narrow particle size distribution, low hardness (reduce the wear of the coating material on the machine), and low moisture content, etc. Characteristic, its suspension has good stability. The lithium battery ceramic separator prepared with submicron hemite as the raw material has high mechanical strength and puncture strength, and has excellent high temperature resistance. It can maintain the complete shape of the separator above 150°C, which can significantly improve the safety of lithium batteries. Especially suitable for power lithium batteries. Boehmite, also known as boehmite, has a white appearance and adopts advanced processing technology. The product has high whiteness, high purity, good dispersion, and high temperature stability. To be used for processing catalysts for petroleum refining, high temperature resistant halogen-free flame retardants (high temperature resistant wire and cable, temperature resistant 320 ℃), electronic industrial products (PCB circuit boards, FR-4, FR-5 epoxy resin boards) , White pigments, battery separators for lithium batteries and other products. 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: Analysis of liquid lithium battery and polymer lithium battery