Application of Fluorine-Containing Substances in Improving Safety of Power Lithium-Ion Batteries
With the increase of the penetration rate of new energy vehicles,the energy density of lithium-ion batteries for power is rising,and the development of high-performance and high-energy-density battery systems to meet the requirements of mileage,charging time and high safety performance is an important research direction at present.Thermal runaway of lithium-ion batteries is an urgent problem to be solved in their safety research,and fluorine-containing substances have been widely used in improving the thermal stability of lithium-ion batteries and preventing thermal runaway.Starting from the thermal runaway phenomenon of power lithium-ion batteries,this paper classifies and summarizes the inducing factors of battery thermal runaway,the application of fluorine-containing substances in optimizing single battery materials(anode,cathode,electrolyte and separator),battery thermal management technology,and methods to improve the thermal safety of power lithium batteries,so as to provide a reference for solving the thermal runaway problem of power lithium-ion batteries.