LG Energy Solution's Sodium-Ion Battery Expands into N. American ESS Market

LG Energy Solution’s Ochang Energy Plant in Cheongju, North Chungcheong Province LG Energy Solution is accelerating the development of sodium-ion batteries as a potential next-generation growth driver, expanding its battery portfolio beyond conventional lithium-ion technology. The company has established a pilot production line in South Korea and is preparing to validate its technology with North American customers, positioning itself for an early entry into the emerging sodium-ion energy storage system (ESS) market. According to battery industry sources on Oct. 13, LG Energy Solution has established a sodium-ion battery pilot line at its Ochang Energy Plant in North Chungcheong Province. The company is currently conducting vehicle tests involving 12-volt and 24-volt batteries and plans to carry out sample testing for approximately 30 megawatt-hours (MWh) of sodium-ion ESS batteries with North American customers by the first half of 2027. Sodium-ion batteries use sodium instead of lithium as a key raw material, offering the potential for lower production costs and improved thermal safety. One of the technology's main advantages is the abundance and accessibility of its raw materials. Sodium is estimated to be approximately 1,200 times more abundant than lithium in the Earth's crust and can also be extracted from seawater, potentially reducing dependence on geographically concentrated supply chains. Sodium-ion technology also offers promising low-temperature performance. According to the performance figures cited in the industry, certain sodium-ion batteries can retain more than 90% of their charge capacity at temperatures as low as minus 40 degrees Celsius, although actual performance varies by cell chemistry and design. LG Energy Solution is pursuing a commercialization roadmap targeting 2027, initially focusing on automotive auxiliary batteries, uninterruptible power supplies (UPS) and stationary energy storage systems. The company eventually aims to expand into affordable electric vehicles as improvements in energy density make the technology suitable for a broader range of applications. It also plans to work with South Korean materials suppliers to establish a domestic sourcing network and strengthen its supply chain competitiveness. Competition is intensifying as other South Korean battery manufacturers advance their own sodium-ion development programs. Samsung SDI is developing UPS solutions for AI data centers and stationary ESS products using its proprietary technologies, with more detailed mass-production plans expected in 2027. SK On is also expanding its ESS development efforts, targeting completion of sodium-ion battery prototypes in 2027 and commercialization in 2028. Stationary energy storage is emerging as a promising initial market for sodium-ion technology because space and weight constraints are generally less demanding than those for electric vehicles. Although sodium-ion batteries typically have lower energy density than lithium-ion alternatives, their potential cost advantages and low-temperature performance could make them attractive for fixed-site applications. The South Korean government is also seeking to accelerate the commercialization of next-generation battery technologies. At a recent event, the deputy prime minister for economic affairs and the minister of climate, energy and environment pledged support for emerging technologies, including sodium-ion batteries, as part of the government's ambition to lead the next-generation battery market by 2035. Competition from Chinese manufacturers remains a major challenge. CATL, the world's leading battery manufacturer, unveiled a sodium-ion ESS product in June and announced plans for cumulative shipments of 1 gigawatt-hour (GWh) by the end of 2026. An LG Energy Solution representative said the company aims to establish a leading position in the emerging market by securing key technologies and supply chain capabilities at an early stage. The company's progress in customer validation, production readiness and cost competitiveness will be critical to determining how quickly sodium-ion batteries can become a commercially viable addition to its existing portfolio.