The difference between non-woven diaphragm and current traditional diaphragm

[Non-woven fabric factory, Quanzhou non-woven fabric, non-woven fabric manufacturer, is your choice! In recent years, with the vigorous development of the lithium battery industry, the market has increasingly higher requirements for the performance of lithium batteries. A series of problems such as the safety of lithium batteries, high-power charging and discharging, and the improvement of cruising range have also appeared. The corresponding upgrade of each material in the lithium battery will surely become a breakthrough to solve these problems.　　 non-woven diaphragms are likely to be an important direction for the upgrading of existing polyolefin diaphragms. Some basic characteristics of non-woven separators, especially the advantages compared with traditional PP\PE separators (such as fast charging, safety and other advantages), determine that it should occupy the separator materials used in lithium batteries in the future A place. At present, according to the information obtained by the true lithium research, many battery manufacturers have shown a strong interest in non-woven separators, and some battery manufacturers are trying out such products and have obtained good feedback.　　The main difference between non-woven diaphragms and current traditional diaphragms　　 First of all, in terms of materials, PP/PE and non-woven fabrics (here refers to PET non-woven fabrics) use polymer materials with different glass transition temperatures. Simply put, the glass transition temperature of PP/PE is below room temperature. As the temperature rises, the material of the film will become softer (strictly speaking, it is the temperature at which the molecules accelerate locally). However, in the case of using PET non-woven fabrics, its glass transition temperature is above 80°C. As the temperature rises, it will not become soft, but it can also maintain a stable porosity, making the cycle life of the battery longer. long.　　 In fact, the same phenomenon has been verified in the use of Ni-MH batteries. When the high-rate Ni-MH battery is working, when the internal temperature of the battery exceeds 100℃, use a general separator or a general nylon separator. Under the condition of 200A discharge of the D-type battery, only a few charge and discharge cycles are performed. It will deteriorate quickly.　　 If a separator made of a special nylon material with a high glass transition temperature is used, the battery life will be greatly improved. Sanyo Electric has published the results of this research. In the future, many facts will be continuously verified in experiments. Just like the original non-woven membrane made of glass fiber, it can also be used in lithium-ion batteries. In addition, PP/PE microporous membranes will also It is considered that the pore size and porosity are large, but the lithium-ion batteries at that time were mainly used in cameras and mobile phones. The requirements for the diaphragm were thin thickness and closed pore function, which resulted in the development of microporous membranes occupying certain advantages. Previous: The price of non-woven fabrics in Laoshan District, Quanzhou