Fluorinated ethylene carbonate (FEC) is a colorless transparent liquid at normal temperature, which can be used as an intermediate of medicine and pesticide. Electronic grade fluoroethylene carbonate refers to the fluoroethylene carbonate that conforms to the relevant application standards and is used for lithium battery electrolyte. It is a core additive developed for the electrolyte of high power lithium-ion battery. It is to achieve high safety and high power of lithium battery.