This chapter describes the principles of hydrogen liquefaction at cryogenic temperatures, along with the Ortho-para hydrogen conversion, key materials and equipment used for liquid hydrogen tanks. The discussion emphasizes the importance of materials that can withstand extremely low temperatures while maintaining the structural integrity and safety of the storage systems. Additionally, this chapter explores the future prospects of liquid hydrogen technology, particularly its applications in large-scale hydrogen storage and transportation. This chapter also discusses the potential applications of liquid hydrogen in aerospace, heavy industry, and beyond, where its high energy density and compact nature make it an attractive option. Moreover, this chapter evaluates the challenges associated with liquefaction energy consumption and infrastructure requirements, while considering future advancements that could further enhance the viability of liquid hydrogen storage solutions.