What are the key materials for power lithium batteries
Key material 1: Polymer diaphragm A. First analyze the requirements of the battery for the diaphragm and the detection methods of various physical properties of the diaphragm; B. Specific analysis of the main polymer materials commonly used in the diaphragm and their characteristics, such as polyolefins and fluoropolymers Materials, polyesters, polyimides, sulfonamides and biomass celluloses that Qingdao Energy Storage Institute is committed to promoting; C. Summarizes the dry processing technology, wet processing technology and its Differences; specific comparison and decomposition of representative polyolefin diaphragm products on the market; focusing on the analysis of the progress of basic research in modified polyolefin diaphragms; also specific analysis of the relevant parameters of representative products of modified polyolefin diaphragms, such as ceramics Coated and aramid-coated polyolefin membranes, as well as the innovative exploration of domestic companies in the blending of polyolefin and ceramic particles; D. Analysis of meltblown and spunbond non-woven fabric substrates in non-woven composite membranes The manufacturing process and the comparative decomposition of representative products of non-woven composite diaphragms; further analysis of the development of electrospinning non-woven diaphragms, and also recommending Qingdao Energy Storage Institute to take the lead in the development of large-scale electrospinning equipment prototypes in China The pilot test of electrospinning non-woven diaphragm processing; and the high-performance cellulose-based composite diaphragm developed by Qingdao Energy Storage Institute using papermaking technology. Key Material 2: Polymer Electrolyte The subject of this chapter is polymer electrolyte. The purpose of developing polymer electrolyte is to improve battery safety by not using liquid electrolyte or using less liquid electrolyte. Therefore, polymer electrolytes are divided into two categories: Solid polymer electrolyte (no liquid electrolyte is used) and gel polymer electrolyte (liquid electrolyte is less used). Have you discovered it? That’s right, this chapter will exclusively reveal the key core solid polymer electrolytes of solid-state batteries that have been hyped around the world: A. First analyze the basic research progress of the most widely used polyethylene oxide (PEO) solid polymer electrolytes, and Decompose its commercial application status and related patents; B. The most important content of this chapter is to share the research progress of Qingdao Energy Storage Institute in polycarbonate-based solid polymer electrolytes, and analyze the solid-state batteries developed by Qingdao Energy Storage Institute in the whole world. Demonstration of applications in the sea depth category; C. Analyze the research progress of silicon-based solid polymer electrolytes and the decomposition of related patents; In addition, plastic crystal and inorganic-organic composite solid electrolytes are also explained accordingly; D. Finally, specific analysis and condensation The progress of gel polymer electrolyte in the field of basic research in recent years. The design concept of rigid and flexible polymer electrolyte Qingneng-I solid-state battery supplies energy and equipment for the Wanquan lander. Key material three: polymer binder The subject of this chapter is polymer binder. The original binder is Write like this, everyone used to write the binder is wrong! Without further ado, the importance of the adhesive has only been accepted by everyone in recent years. The quality and use of the adhesive determines the quality of the battery to a certain extent: A. Analyze the market pattern of the adhesive, and summarize the impact of the decomposition of the battery. Detailed performance requirements and related detection methods of adhesives; B. Specific analysis is carried out according to the classification of synthetic adhesives, natural adhesives, and conductive polymer adhesives, and the synthetic methods and mixing ingredients (coating materials) of adhesives commonly used in the industry are analyzed. Fabric technology) use methods to share with everyone; analysis of the good application of acrylonitrile modified chitosan binder developed by researcher Cui Guanglei of Qingdao Energy Storage Institute in lithium batteries. Key material four: The polymer aluminum plastic film in the aluminum plastic film has complex technology and extremely high barriers. The words and phrases seem simple but the top, the entry threshold is comparable to the sky to describe the aluminum plastic film can not be more appropriate. Aluminum-plastic composite film (abbreviated as aluminum-plastic film) is the key material for the packaging of soft-packed lithium battery cells. The basic structure of aluminum-plastic film is generally divided into three layers, namely polymer outer layer/aluminum foil layer/polymer inner layer, and each layer is compounded by adhesive polymer additives. Soft-packed lithium batteries have almost strict requirements on the performance of aluminum-plastic film, including ultra-high water and oxygen barrier properties (10,000 times that of general aluminum-plastic films for food packaging), good cold stamping performance, puncture resistance, and electrolyte resistance Corrosion performance, high temperature resistance (heat sealing) performance and insulation performance, etc., any one of the performance is missing, it may lead to battery failure, or even thermal runaway, fire and explosion. Therefore, aluminum-plastic film has extremely high technical barriers in design, raw materials, processing and manufacturing (high-precision coating technology) and application, and its difficulty is far more difficult than other components such as polymer separators, adhesives, positive and negative materials, and electrolytes. , Is also the core material of soft pack batteries that has not yet achieved large-scale localization. It is highly dependent on foreign products. The domestic market share is 85% controlled by Japanese companies, and domestic companies account for less than 5% of the market share. The situation is worrying. If you search on the Internet, you may find that it is difficult to find articles and information about aluminum-plastic film. It seems to be very esoteric. This chapter will present you with a lot of internal information to reveal the aluminum-plastic film: A. Specific analysis of the market and importance of aluminum-plastic film Processing technology (dry process and thermal process) and process comparison; B. Focus on analyzing the performance requirements and evaluation and detection methods of aluminum-plastic film; C. In order to know the esoteric veil of aluminum-plastic film, the four major aluminum-plastic film companies ( Japan’s Showa Denko, Japan’s DNP, Japan’s Toppan Printing, South Korea’s Kurimura Chemical, accounted for 95% of the domestic market share) aluminum-plastic film patents were fully decomposed, summarized the application of polymers in aluminum-plastic film; South Korea’s Kurimura Chemical in the category of aluminum-plastic film Started late, but relying on excellent quality has continuously eroded the market share of Japanese manufacturers in recent years. Its relevant experience is worthy of reference for domestic aluminum-plastic film companies and scientific research experts. 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