Sodium-ion Battery materials sit at the center of a new partnership in South Korea. EcoPro BM, Soulbrain, and Aekyung Chemical have formed the K-Sodium Alliance to develop a full materials package for sodium-ion batteries. The group will combine cathode materials, electrolyte, and hard carbon anode material. Then, it will supply that package to battery makers and automakers.
EcoPro BM announced the partnership 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 three companies now plan to speed up sodium-ion battery material development through closer technical cooperation.
Sodium-ion battery materials drive the K-Sodium Alliance
The alliance focuses on the three core materials that shape sodium-ion battery performance. First, EcoPro BM will develop cathode materials and secure mass-production technology. Next, Soulbrain will develop electrolyte and additives. Meanwhile, Aekyung Chemical will develop hard carbon anode material and prepare mass-production technology.
In addition, the companies will share the materials they develop with one another. They will also exchange evaluation results. This process should help them identify the best material combinations faster. Because battery performance depends on how materials work together, this approach can improve battery life, output, and charging performance.
Why sodium-ion battery materials matter in 2026
Sodium-ion batteries use sodium instead of lithium as a main raw material. Therefore, manufacturers can access raw materials more easily. In addition, sodium offers more stable cost conditions than lithium in many cases. Sodium-ion batteries also deliver strong low-temperature performance and solid safety characteristics. For these reasons, companies are developing them for energy storage systems and entry-level Electric Vehicles.
As the battery market expands in 2026, material makers want practical and scalable alternatives for specific applications. Sodium-ion technology fits well in that strategy. It supports lower-cost battery solutions. It also broadens the chemistry options available to battery producers and carmakers.
Sodium-ion battery materials package targets battery makers
The K-Sodium Alliance aims to offer more than separate raw materials. Instead, it plans to provide a bundled materials package. That package will include cathode materials, electrolyte, and hard carbon anode material. This model can make it easier for customers to test and adopt sodium-ion battery systems.
Moreover, a package approach can shorten development timelines. Battery makers often need to evaluate how multiple materials interact inside a cell. By developing those materials together, the alliance can present combinations that already match one another. As a result, customers may gain a more efficient route to product qualification.
Sodium-ion battery materials and South Korea’s supply chain
The partnership also supports South Korea’s battery materials ecosystem. At present, the country is still building a full sodium-ion battery supply chain across cathode materials, electrolyte, and anode material. Therefore, cooperation among specialized material companies can play a key role in commercial expansion.
Each company brings a clear strength to the alliance. EcoPro BM contributes cathode expertise. Soulbrain adds electrolyte and additive capabilities. Aekyung Chemical supports the anode side with hard carbon development. Together, they can create a more connected domestic value chain for sodium-ion battery materials.
Production plans for sodium-ion battery materials
EcoPro BM has worked on sodium-ion battery cathode materials for the past four years. The company now operates a pilot production line with annual capacity of 1,000 tons. That capacity gives EcoPro BM a base for testing scale-up and refining production processes.
Aekyung Chemical is also expanding its role. The company is building a pilot line for hard carbon anode material. That facility will have annual capacity of 1,300 tons. In addition, Aekyung Chemical aims to complete the line within 2026. These investments show that the alliance is moving beyond research and into practical production readiness.
What executives said about sodium-ion battery materials
Jeong Hyun-soo, head of future technology at EcoPro BM, said sodium-ion batteries offer cost competitiveness and strong low-temperature performance. He added that private-sector technology cooperation can raise the competitiveness of South Korea’s domestic industry. His comments reflect the alliance’s main goal: build a stronger local ecosystem for sodium-ion battery materials through coordinated development.
Overall, the K-Sodium Alliance marks an important step for South Korea’s next-generation battery materials market. The partnership brings together three specialized companies. It also aligns research, pilot production, and customer supply goals. If the alliance succeeds, battery makers and automakers could gain a locally developed sodium-ion battery materials package with clear commercial potential in 2026 and beyond.
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