New challenges for lithium fluoride: From dosimeter to solid-state batteries (review)

Lithium fluoride (LiF) stands out as a material with exceptional physical and chemical properties, including high ionic conductivity, thermal stability, and compatibility with modern battery components. While its initial applications were rooted in radiation dosimetry due to its thermoluminescent capabilities, LiF has since evolved into a versatile material with broad applications spanning optics, electronics, and lithium-ion battery (LIB) technologies. This review delves into the multifaceted roles of LiF, charting its progression from a dosimetric material in the 1980s to a critical component in next-generation solid-state batteries. The material’s ability to enhance the stability, durability, and safety of LIB components, especially in solid electrolyte systems, is particularly emphasized. LiF also plays a significant role in the fabrication of high-efficiency OLED devices, as well as in nuclear technologies, where it is utilized in neutron dosimetry and reactor materials. Furthermore, the paper explores LiF’s contributions to defect engineering, surface modifications, and recycling strategies, which are pivotal in advancing its application in energy storage technologies. Beyond batteries, LiF's utility extends to fields like catalysis, biomedicine, and nuclear technologies, reflecting its vast potential for future innovations. This study provides a comprehensive overview of LiF's properties, applications, and research directions, offering insights into its critical role in the development of sustainable and high-performance materials for emerging technologies.