What are the basic preparation methods of lithium battery electrolyte?

Common components of lithium battery electrolyte are ethylene carbonate, diethyl carbonate, dimethyl carbonate, ethyl methyl carbonate, lithium hexafluorophosphate, phosphorus pentafluoride, hydrofluoric acid, etc. 1. Chloroethylene carbonate is synthesized by chlorination of ethylene carbonate with chlorine gas, and then triethylamine is used as an acid binding agent to remove hydrogen chloride to obtain vinylene carbonate. The chlorination reaction is carried out under solvent-free conditions. The elimination reaction uses dimethyl carbonate, which is commonly used as a solvent in the electrolyte, as a solvent to prevent residual solvents from causing adverse effects on additives. At the same time, 2,3,4-tri-tert-butyl is selected. Phenol is used as a polymerization inhibitor, and the yield of the two-step reaction is 75.0%, which is higher than the literature value. 2. Using anhydrous KF and chloroethylene carbonate to prepare fluoroethylene carbonate, the safety cost is reduced, the processing technology is easy to control, and PEG. 800 is a catalyst with a single-step yield of 82.5%. All in all, the future development trend of lithium battery electrolytes will be a gradual transition from the current organic liquid electrolyte to the solid electrolyte, during which various electrolytes of other systems will appear. The research and development of electrolyte must not only comprehensively consider its electrochemical properties, thermodynamic properties, kinetic properties, etc., but also consider the compatibility of the corresponding positive and negative materials and the specific application conditions of the battery for comprehensive design to achieve Comprehensive overall improvement of various performance indicators. The improvement of the overall performance of lithium batteries is a comprehensive project that requires the coordinated progress of all components. 3. 1,3-propane sultone is chlorinated with chlorine to synthesize 2-chloro-1,3-propane sultone, and then triethylamine is used as an acid binding agent to remove hydrogen chloride to produce 1,3-propane Compared with the literature, the reaction route of sultone is greatly shortened, and the yield of the two-step reaction is 72.7%. 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 general characteristics of lithium batteries?