Eco & Solid Sulfide-Based Solid Electrolytes Development for All-Solid-State Batteries

South Korean battery materials manufacturer Eco & Dream announced on July 30 that it has launched Eco & Solid, a wholly owned subsidiary dedicated to developing and commercializing sulfide-based solid electrolytes, one of the essential materials required for next-generation all-solid-state batteries. The new company has been established to strengthen technology development while supporting future commercialization efforts in this rapidly evolving battery segment. Based in South Korea, the initiative reflects the company's strategy to enhance its position in advanced battery materials.

Eco & Solid will build an integrated research and development system that spans the complete value chain of sulfide-based solid electrolyte production. Its work will include the development of synthesis and purification technologies for lithium sulfide (Li₂S), which serves as the primary raw material for sulfide-based solid electrolytes. In addition, the subsidiary will focus on electrolyte composition design, material synthesis, pilot-scale validation, and the development of manufacturing processes suitable for future mass production.

The company also plans to internalize Li₂S manufacturing technology rather than relying on external suppliers. Since lithium sulfide represents a significant portion of the overall production cost for sulfide-based solid electrolytes, bringing the manufacturing process in-house is expected to improve cost competitiveness while helping secure a more reliable supply of critical raw materials. This approach is intended to support both production efficiency and long-term commercialization of all-solid-state battery technologies.

Frequently Asked Questions

Why did Eco & Dream establish Eco & Solid?
Eco & Dream established Eco & Solid to focus on the development and commercialization of sulfide-based solid electrolytes used in all-solid-state batteries. The subsidiary will oversee research, material synthesis, pilot-scale validation, and manufacturing process development while advancing lithium sulfide production technology. By integrating these capabilities under one organization, the company aims to improve production efficiency, reduce material costs, strengthen supply stability, and support the commercialization of next-generation battery technologies.