The types of lithium-ion battery separators and the three major competitive characteristics of the industry

Types of Lithium-ion battery separators Lithium-ion battery separators can be divided into different types according to their structure and composition. There are currently three important and common types in the market, namely porous polymer membranes, non-woven membranes and inorganic composite membranes. 1. Porous polymer membranes refer to lithium ion battery separators with uniform pore distribution prepared by mechanical methods, thermally induced phase separation methods, immersion precipitation methods and other methods. 2. The non-woven fabric separator is composed of oriented or random fibers, and is usually compounded with organic matter or ceramic gel to obtain a lithium-ion battery separator with better chemical and physical properties. 3. Inorganic composite membranes are mostly lithium-ion battery separators obtained by combining inorganic nanoparticles and high polymers. The three major competitive characteristics of the lithium-ion battery separator industry. Feature 1: The proportion of wet-process separator production has increased year by year. From the perspective of the process itself, dry-process separators and wet-process separators have their own advantages and disadvantages. It has great advantages in aspects such as wet process membranes, which have the advantages of low short-circuit rate, large porosity and air permeability controllable range. In view of the respective characteristics of dry-process diaphragms and wet-process diaphragms, the future demand for wet-process diaphragms will gradually expand, but it will not completely replace dry-process diaphragms in a short period of time. Feature 2: High Concentration of Shipments. In terms of shipment volume, in 2017, my country’s dry-process diaphragm and wet-process diaphragm companies have a relatively high degree of company concentration, especially for wet-process diaphragms, the top three companies’ shipments. The proportion reached 71%, and the top five accounted for 87%; the top three companies of dry process membrane accounted for 42%, and the top five accounted for 55%. Feature 3: Obvious regional production. Judging from the current regional distribution of lithium-ion battery separator materials companies in my country, the overall concentration is relatively high, mainly concentrated in East China and Central China, with output proportions reaching 48% and 27% respectively; South China's output accounts for The ratio is also 10%, while other regions are all below 10%. 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: Introduction to the advantages, disadvantages and performance of lithium iron phosphate batteries