Analyze what are the important components of lithium battery electrolyte

The electrolyte is mainly composed of three parts, the most important being solvent, lithium salt, and additives. Among these components, although the amount of additives added is still small compared with other components, the types of additives that can be added in a portion of the electrolyte are the most. Solvents Solvents are used in electrolytes to dissolve lithium salts. The important solvents in the electrolyte are cyclic carbonates (PC, EC); chain carbonates (DEC, DMC, EMC); carboxylic acid esters (MF, MA, EA, MA, MP, etc.). Lithium salt High-quality lithium salt has a great influence on the energy density, power density, wide electrochemical window, cycle life, safety performance and other aspects of lithium batteries. Elements often contained in lithium salts include LiPF6, LiClO4, LiBF4, LiAsF6, and so on. There are many types of additives, and different additives have different uses. Although the added amount is small, they have different effects on the performance and effect of lithium battery packs. The main types of additives include film-forming additives, conductive additives, flame retardant additives, overcharge protection additives, additives to control the content of H2O and HF in the electrolyte, additives to improve low-temperature performance, and multifunctional additives. The electrolyte has a significant impact on the overall performance of the lithium battery. What are the conditions that the lithium battery electrolyte must meet to have better performance? The electrolyte must meet the conditions High ion conductivity, generally should reach 1x10-3~ 2x10-2S/cm; high thermal stability and chemical stability, no separation occurs in a wide voltage range; wide electrochemical window, stable electrochemical performance in a wide voltage range; and battery Other parts such as electrode materials, electrode current collectors and separators have a good compatibility statement: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete the previous article: Safety and reliability of lithium iron phosphate batteries How to test?