SBTL Advanced Materials Targets Pouch Film Market for All-Solid-State, Defense, and Aerospace Applications

Participation in InterBattery 2026

Pouch film for all-solid-state battery packaging developed by SBTL Advanced Materials. SBTL Advanced Materials

SBTL Advanced Materials, a secondary battery materials company, announced that from March 11 to 13, at InterBattery 2026—the largest battery exhibition in Korea held at COEX, Seoul—it unveiled pouch film products designed for a wide range of markets, including energy storage systems (ESS), all-solid-state batteries, defense, and aerospace applications.

SBTL developed a high-safety solution for ESS batteries, where fire safety is paramount, by utilizing thick film technology. This technology allows the pouch film to withstand external impacts and prevent flame propagation during thermal runaway. The company explained that, by employing ultra-high forming technology, the product can maximize battery capacity within limited space, thereby increasing energy density.

SBTL also introduced pouch film suitable for all-solid-state batteries, which must undergo high-temperature and high-pressure processes. All-solid-state batteries lack liquid electrolytes, so a process applying thousands of atmospheres of pressure after assembly is required to reduce interfacial resistance.

Chun Sangwook, CEO of SBTL, stated, “With the expansion of physical AI, wearable devices, and aerospace systems, demand for pouch film for all-solid-state batteries is expected to surge. We have established ourselves as a total solution partner by participating from the initial battery design stage, providing optimal thickness, formability, and pressure resistance.”

At this exhibition, SBTL Advanced Materials also showcased lightweight, high-strength, and high-energy density pouch films suitable for the defense market. A company representative explained, “In the past, military batteries primarily used specialized primary cells or heavy prismatic and cylindrical types to protect against external shocks. However, as modern warfare equipment like UAVs and robots becomes more advanced, demand for ‘light and strong’ pouch-type batteries is increasing.”

SBTL Advanced Materials explained that its pouches can reduce packaging weight by more than 25% compared to prismatic and cylindrical types of the same capacity, thereby extending the operational duration of unmanned systems.

This year at the exhibition, the company also introduced a specialized pouch utilizing stainless steel (STS) substrate. The stainless steel substrate, which serves as the frame of the exterior material, can withstand temperatures of approximately 1,350 degrees Celsius—more than twice as high as conventional aluminum, which melts at around 660 degrees Celsius.

Meanwhile, SBTL Advanced Materials plans to begin construction in the second half of this year on a new factory expansion covering 30,000 pyeong.

This content was produced with the assistance of AI translation services.