Brief introduction to the basic requirements and formula of the electrolyte of lithium ion batteries

The basic requirements of the electrolyte of lithium batteries a. High lithium ion conductivity, generally should reach 1x10-3~2x10-2S/cm; b. High thermal and chemical stability, no occurrence in a wide voltage range Separation; c. A wider electrochemical window to maintain the stability of electrochemical performance in a wide voltage range; d. Good compatibility with other parts of the lithium battery such as electrode materials, electrode current collectors and diaphragms; e. Safe, non-toxic and non-polluting. Lithium battery electrolyte formulation optimization 1. Chlorinated ethylene carbonate is synthesized with chlorine gas to synthesize chloroethylene carbonate, 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, and the elimination reaction uses dimethyl carbonate, which is commonly used as a solvent in the electrolyte, as a solvent, which can be used to prevent the residual solvent from causing adverse effects on additives. At the same time, choose 2,3,4-tri-tert-butyl Phenol is used as a polymerization inhibitor, and the two-step reaction yield is 75.0%, which is higher than the literature value. 2. Using anhydrous KF and chloroethylene carbonate to react to prepare fluoroethylene carbonate, the safety cost is reduced, and the processing technology is easy to control. With PEG.800 as the catalyst, the single-step yield is 82.5%. 3. 1,3-propane sultone is chlorinated with chlorine gas to synthesize 2-chloro-1,3-propane sultone, and then triethylamine is used as an acid binding agent to remove hydrogen chloride to obtain 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: Detailed explanation of battery electrolyte composition and use