LAUSR

The state-of-the-art electrolytes utilized in lithium ion batteries are basing on liquid carbonates combining a score of additives to fulfill the practical requirements including safety and low temperature. The plenty of components result in the quadruple times of probable radical groups involved into the interfacial reactions, rendering it too difficult to control the surface layer. This work tends to simplify the system with the fluorine-substituted ether as functional co-solvent to expand the functions of basic electrolyte. The incorporation of this solvent enables the electrolyte to self-extinguish, pushes its frozen point to ~ 75 °C lower and assists the formation of the LiF-rich protective interlayer, resulting in the improvement of the rate capability, cryogenic performance and cyclic stability for LiNi1/3Co1/3Mn1/3O2 cathode. This novel design could significantly diminish the amount of necessary additives and possess the acceptable cost, which provide a probability to revitalize the development of liquid electrolytes.