LOTTE Energy Materials Finalizes Pilot Plant for 'Sulfide-Based Solid Electrolyte' Production

LOTTE Energy Materials is preparing to launch full-scale sales of key materials for next-generation all-solid-state batteries following the completion of a pilot plant for sulfide-based solid electrolytes. The company, led by CEO Kim Yeon-seop, announced on September 5th that it has invested 15 billion KRW to complete this plant at its Iksan Plant 2 in Jeonbuk. Covering 1,619 square meters, the facility has an annual production capacity of 70 tons of solid electrolytes. Trial operations are set to begin by the end of September, pending regulatory approvals, with the goal of producing initial samples by year-end.

The sulfide-based solid electrolyte developed by LOTTE Energy Materials offers significant technological benefits. These include advanced particle size control for high ionic conductivity, moisture stability, and the ability to efficiently charge and discharge batteries. The particle size control technology allows for faster and more efficient battery performance by optimizing the size and distribution of solid electrolyte particles. Additionally, the electrolyte’s moisture stability composition ensures that the material retains its chemical structure and performance even when exposed to moisture, addressing a common challenge that can reduce battery lifespan. The electrolyte’s high ionic conductivity also enhances the movement of lithium ions within the battery, improving charging and discharging speeds.

The company's synthesis technology is key to both battery performance and cost-effectiveness. By developing mass production processes using dry and wet synthesis methods, LOTTE Energy Materials is positioned to scale production and reduce costs. After trial operations and stabilization phases, the company plans to provide evaluation samples to domestic and international battery companies by the end of 2024. If all approvals and supply contracts are secured by 2025, production facilities will be expanded to achieve an annual capacity of 1,200 tons by 2026, with full-scale mass production targeted for 2027.

LOTTE Energy Materials’ strategy includes offering a comprehensive solution for all-solid-state battery materials. This will be achieved by integrating its domestically developed nickel-plated foil, which is highly resistant to corrosion and can be customized based on customer specifications. CEO Kim Yeon-seop expressed confidence in the company's readiness, stating, "With our sulfide-based solid electrolyte and nickel-plated foil, we aim to lead the all-solid-state battery material market through customer-driven sales and innovation."

LOTTE ENERGY MATERIALS Corporation, established on August 11, 1987, employs 564 people as of 2023. In March 2023, the company became a part of the LOTTE Group. Known for its innovation in the advanced materials sector, LOTTE ENERGY MATERIALS has developed hybrid Elecfoil products with exceptional characteristics, including ultra-thinness, high strength, and superior elongation. The company’s cutting-edge technology has garnered recognition from leading global advanced battery manufacturers, further solidifying its position in the industry.