Why is the competitiveness of the lithium battery separator industry so weak?

Reasons for the weak competitiveness of the lithium battery separator industry 1. my country's lithium battery separator industry started late and the relevant technology reserves of the separator industry are insufficient. At present, the preparation process of lithium battery diaphragm mainly includes three kinds of dry uniaxial stretching, dry biaxial stretching and wet process; the dry uniaxial stretching technology and related patents are mainly controlled by Celgard in the United States, Ube in Japan and other companies. While the wet process technology and related patents are mainly in the hands of Japan’s Asahi Kasei and other companies; although, Xingyuan Materials independently developed the dry uniaxial stretching technology in 2008 and obtained the corresponding patented technology. The Institute of Chemistry, Chinese Academy of Sciences Research on self-developed biaxial stretching technology, but the maturity of the technology and the number of related patents still have a certain gap compared with foreign countries. 2. High technical barriers To meet the high working voltage, small size, large energy density, high discharge power and other requirements of lithium batteries, the separator material must have excellent compatibility with high electrochemically active anode and cathode materials, and microscopic pores Consistency of structure and pore size distribution, suitable thickness, ion permeability, pore size and porosity, and sufficient safety performance such as chemical stability, thermal stability and mechanical stability, which requires a high-standard raw material formula for diaphragm products Design, micropore preparation technology and complete equipment design capabilities. At present, there is still a significant gap between domestic diaphragms and foreign countries in terms of the above-mentioned raw material formula, microporous preparation technology and complete equipment design capabilities. The lack of key technologies and the lack of equipment levels have led to the relatively poor consistency and stability of domestic diaphragms, which also affects the performance of lithium batteries to a certain extent. 3. Talent issues. The research and development, processing and manufacturing technology of high-quality lithium battery separators involves multiple disciplines such as polymer materials science, material production, nanotechnology, electrochemistry, surface and interface science, mechanical design and automation control technology, and complete equipment design. , The coordination and cooperation of professionals in the above-mentioned multiple fields is also necessary, and there is still a great shortage of relevant talent training and reserves in my country. 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: What are the advantages of lithium battery electric vehicles?