➀ Solid-state lithium batteries are a next-generation energy storage technology with high energy densities suitable for electric vehicles and advanced electronics; ➁ The University of Oxford and other institutions have explored the use of thermal evaporation for the scalable and cost-effective production of thin lithium anodes; ➂ The study emphasizes the importance of ultra-thin lithium foils for enhancing battery performance without sacrificing density, and estimates the costs of manufacturing these foils and their implications for solid-state battery pricing.