Sodium-ion Battery materials sit at the center of a new partnership in South Korea. EcoPro BM, Soulbrain, and Aekyung Chemical have launched the K-Sodium Alliance to develop a full materials package for sodium-ion batteries. Together, the three companies will combine cathode materials, electrolyte, and hard carbon anode material. Then, they plan to supply that package to battery makers and automakers.
EcoPro BM announced the agreement on July 26, 2026. The company said it signed a memorandum of understanding with Soulbrain and Aekyung Chemical on July 22 at its headquarters in Ochang, North Chungcheong Province. As a result, the alliance now gives South Korea a coordinated push to build a domestic sodium-ion battery materials ecosystem.
Sodium-ion battery materials alliance targets full-package supply
The K-Sodium Alliance aims to create optimal combinations of three core materials. First, EcoPro BM will develop cathode materials. It will also secure mass-production technology. Next, Soulbrain will develop electrolyte and additives. Meanwhile, Aekyung Chemical will develop hard carbon anode material and build related mass-production technology.
This structure matters because battery performance depends on more than one component. In fact, the interaction between cathode materials, electrolyte, and anode material shapes battery life, output, and charging performance. Therefore, the companies will share materials with one another and compare evaluation results. By doing so, they can improve compatibility across the full cell system.
Why sodium-ion battery materials matter in 2026
Sodium-ion batteries use sodium instead of lithium as a raw material. As a result, companies can access raw materials more easily. In addition, sodium offers a more stable cost profile than lithium in many cases. Sodium-ion batteries also deliver solid low-temperature performance and strong safety characteristics. Because of these strengths, manufacturers are developing them for energy storage systems and entry-level Electric Vehicles.
In 2026, interest in sodium-ion technology continues to grow as battery makers seek broader chemistry options. For that reason, a reliable supply chain for sodium-ion battery materials has become more important. South Korea already has strong capabilities in battery manufacturing and advanced materials. Now, this alliance adds a focused effort to connect those strengths in sodium-ion batteries.
Sodium-ion battery materials roles of EcoPro BM, Soulbrain, and Aekyung Chemical
EcoPro BM
EcoPro BM has worked on sodium-ion battery cathode materials for the past four years. The company already operates a pilot production line with annual capacity of 1,000 tons. That existing base gives the alliance a practical starting point for product development and scale-up.
Soulbrain
Soulbrain will lead work on electrolyte and additives. Electrolyte chemistry plays a critical role in ion transport, safety, and cycle stability. Accordingly, Soulbrain’s work will support the broader effort to match each material for better overall battery performance.
Aekyung Chemical
Aekyung Chemical will develop hard carbon anode material for sodium-ion batteries. The company is also building a pilot line with annual capacity of 1,300 tons. It aims to complete the facility within 2026. Consequently, the alliance will gain added pilot-scale support for future commercialization.
How the sodium-ion battery materials package could support customers
The alliance plans to bundle the three core materials into one package. This approach can help battery makers test integrated combinations more efficiently. It can also support automakers that want a clearer path from material selection to battery design. Instead of sourcing each material separately, customers may evaluate a coordinated package built for compatibility.
Moreover, the package approach reflects how batteries work in the real world. A battery cell performs best when its materials are tuned together. Therefore, joint development can speed validation and improve consistency. For customers, that creates a more practical route to adoption in ESS and entry-level EV applications.
Sodium-ion battery materials strengthen South Korea’s supply chain
The launch of the K-Sodium Alliance marks an important step for South Korea’s battery supply chain. Until now, the country has not had a fully linked sodium-ion materials chain across cathode materials, electrolyte, and anode material. This alliance begins to close that gap with direct cooperation among specialized companies.
Jeong Hyun-soo, head of future technology at EcoPro BM, said sodium-ion batteries offer cost competitiveness and low-temperature performance. He added that the companies will raise the competitiveness of the domestic industry through private-sector technology cooperation. That message highlights the alliance’s larger goal. Beyond product development, the group wants to build a stronger domestic base for sodium-ion battery materials.
Overall, the K-Sodium Alliance brings together complementary strengths in cathode materials, electrolyte, and hard carbon anode material. With EcoPro BM’s 1,000-ton pilot line and Aekyung Chemical’s planned 1,300-ton pilot line, the partnership already includes meaningful production groundwork. As development advances in 2026, the alliance could play a key role in shaping South Korea’s sodium-ion battery materials market.
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