Physical and Chemical Properties
Lithium fluoride has the formula LiF and a molecular weight of 25.94. Its melting point is 845 degrees, its boiling point is 1681 degrees and its density is 2.64 g/mL at 25 degrees. It is soluble in water at 0.29 g/100 mL at 20 degrees and in hydrogen fluoride, and insoluble in alcohol. It is hygroscopic and appears as white to off-white crystals, with a pH of 6.0 to 8.5 in aqueous solution.
Use in Battery Materials
Battery grade lithium fluoride is one of the key raw materials for the production of lithium hexafluorophosphate, a common electrolyte for lithium-ion batteries. The purity of the lithium fluoride directly affects the quality of the electrolyte and the battery performance. The battery grade material is supplied with strict impurity control.
Use in Optical Glass and Electrolysis
Lithium fluoride is used as a desiccant and flux, and in the manufacture of optical glass. Its optical transparency in the ultraviolet range makes it valuable for UV optics and windows. It is also used as an additive for aluminum electrolysis and rare earth electrolysis, where it improves the conductivity and the efficiency of the process.
Use in Optoelectronics and Coatings
Lithium fluoride is used in optoelectronic material research for insulating material coating and electrode modification layers. The thin films of LiF are used in organic light-emitting devices and photovoltaic cells as electron injection layers and interfacial modifiers, improving the device performance.
Safety and Handling
Due to its chemical nature, lithium fluoride requires careful handling. Direct contact or inhalation should be avoided, and appropriate personal protective equipment should be used. The product is stored in sealed containers away from moisture and incompatible materials, and the COA and SDS are provided with each batch.
Frequently Asked Questions
What is lithium fluoride? n inorganic compound with the formula LiF and CAS 7789-24-4.
What is lithium fluoride used for? Batteries, optical glass, electrolysis and optoelectronic coatings.
Why is it used in batteries? It is a raw material for lithium hexafluorophosphate electrolyte.
What is the melting point? 845 degrees Celsius.
What protective measures are needed? void contact and inhalation with appropriate protective equipment.