The diaphragm of the four major constituent materials of industrial lithium batteries

The diaphragm, the four major components of industrial lithium battery materials. As the pace of our lives accelerates, various electronic products have become more diverse and powerful, which means that they consume more energy faster. Lithium batteries have greater advantages than ordinary batteries and have entered people's field of vision. Today we come to know one of the most important information gaps in industrial lithium battery processing. Meaning: In the structure of lithium batteries, the gap is one of the key internal components. The separation function determines the interface structure and internal resistance of the battery, which directly affects the battery's capacity, cycle and safety performance. The separation with excellent performance plays an important role in improving the overall performance of the battery. Its important use is to isolate the positive and negative electrodes of the battery, prevent north-south contacts and short circuits, except for the use of electrolyte ions. Classification: According to different physical and chemical characteristics, the isolation information of industrial lithium batteries can be divided into: woven fabric film, non-woven fabric film (non-woven fabric), microporous film, composite film, release paper, roll film and other categories. Polyolefin materials have excellent mechanical properties, chemical stability and relatively inexpensive characteristics. Therefore, in the early stages of lithium battery development, polyolefin microporous membranes such as polyethylene and polypropylene have been used as barriers for lithium batteries. Although in recent years, other data have been used to prepare lithium battery barriers, such as the use of phase inversion methods to prepare lithium battery barriers with polyvinylidene fluoride (PVDF) as the bulk polymer, and cellulose composite membranes for lithium battery barriers. However, the current isolation data of commercial lithium batteries is still the first choice for polyethylene and polypropylene microporous membranes. Implementation: Gap is an important part of industrial lithium batteries. In recent years, as the price of Gap has been successfully localized, the price has dropped rapidly, and its proportion in the total cost of lithium batteries has declined, generally around 7-15%. Generally speaking, due to the high unit cost of positive and negative data of ternary batteries, the gap cost accounts for less than 10%, while the unit cost of positive and negative data of lithium iron phosphate batteries is relatively low, and the gap cost accounts for about 15%. Lithium battery resource speculation, technical barriers and higher gross profit barriers, plus the final localized data achieved. my country's barrier industry lacks competitiveness. According to GGII statistics, the gap production of lithium-powered lithium-ion batteries in my country increased by 32.38% in 2017, and the gap localization rate has further improved, from 85% in 2016 to 90% in 2017. The export volume continues to rise. But this does not conceal the fact that my country's lithium battery industry has relatively weak barrier competitiveness: at present, my country's domestic barrier companies mainly rely on low-end output, while high-end output is relatively small, and domestic high-end barriers rely mainly on imports. The weak competitiveness of my country's lithium battery separator industry is mainly caused by the following reasons: First, my country's industrial lithium battery separator industry started late, and the relevant technical reserves of the separator industry are insufficient. Second, high-tech barriers. In order to meet the requirements of high working voltage, small size, high energy density, and high discharge lithium batteries, the gap data must have good compatibility with high electrochemically active anode and cathode data, the consistency of the micropore structure and pore size distribution, and the appropriate thickness and Ion transmittance. Third, the issue of talents. Fourth, the industrial concentration is low. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete it.