South Korea’s EcoPro BM said it aims to begin mass production of sulfide-based solid electrolytes, a core material for all-solid-state batteries, as early as 2027, laying out a roadmap to supply the full slate of materials the next-generation cells will require. The plan was disclosed at a corporate briefing in Yeouido, Seoul, on July 16 and formalized in a roadmap announcement on July 19.