Lithium is a metal element, known as the green energy metal and "white oil", widely used in energy storage, chemical industry, medicine, metallurgy, electronics industry and other fields. Lithium is located in the second cycle of the periodic table of the elements IA, element symbol Li. Its atomic number is 3, atomic weight 6.941, melting point is 180.5 ℃, boiling point of 1342 ℃, specific heat capacity of 3.58 kJ/kg-K, corresponding to the monomers for the silver-white soft metal, in all known metals in the lightest specific gravity. It can react with water, soluble in nitric acid, liquid ammonia and other solutions.
With the popularity of electric vehicles, energy storage devices and mobile electronic products, lithium batteries, as an important type of battery, have become an indispensable energy storage device in modern society. Lithium batteries can be divided into several categories according to positive electrode materials, electrolytes, packaging materials and application types. Different types of lithium batteries have their own application scenarios, such as lithium cobalt acid batteries for 3C products, lithium iron phosphate batteries for plug-in hybrid vehicles.