SK On completed a pilot plant for all-solid-state batteries in Daejeon, South Korea. The milestone accelerated its commercialization timeline to 2029, one year earlier than planned. The project highlighted SK On’s ambition to dominate next-generation battery technology.
All-solid-state battery cells provide major advantages over lithium-ion products. They reduce explosion risks and lower chances of electric vehicle fires. Additionally, they deliver higher stability, making them crucial for the future of mobility.
The pilot facility spans about 4,628 square meters. It produces prototype cells for client evaluations and serves as a testing ground. SK On will refine quality and performance before starting full-scale production.
At the same time, the company will develop sulfide-based all-solid-state batteries at the site. Moreover, it will dedicate part of the facility to lithium metal battery research. Lithium metal cells reduce weight and volume while achieving higher energy density.
With this progress, SK On set a new goal for commercialization. It now targets 2029 with an initial density of 800 watt-hours per liter. In the long term, it plans to reach 1,000 watt-hours per liter. These goals show its focus on energy efficiency and competitiveness.
For the first time in Korea, SK On applied Warm Isostatic Press technology to battery production. This technique applies uniform pressure to electrodes, enhancing density and performance. Typically, WIP faces hurdles due to sealed cells and low automation. However, SK On designed unique methods to overcome these limits. It combined WIP with conventional presses to boost efficiency while preserving core advantages.
Furthermore, SK On improved mixing techniques for active materials and conductive additives. These adjustments reduced heat, enhanced charge rates, and stabilized cycles. As a result, the cells achieved lower internal resistance and smoother current flow.
Engineers also refined electrode–electrolyte bonding and optimized pressing conditions. These changes reduced interfacial resistance, extended battery lifespan, and increased safety. Every technical adjustment moved SK On closer to its goal of advanced mass production.
Leadership emphasized the project’s importance during the completion ceremony. Executives explained that the pilot plant marked a decisive step toward global leadership in battery technology. They underlined SK On’s plan to accelerate electrification and outpace competitors in the all-solid-state battery race.
All-solid-state battery technology remains a cornerstone of SK On’s growth strategy. Through advanced facilities, new techniques, and ambitious goals, the company positioned itself as a pioneer in the sector.
