Sodium-Ion Batteries Accelerate Toward Commercialization: Focus on Energy Storage and Alternative Applications

In the 1970s, sodium-ion battery technology began development in parallel with lithium-ion batteries. After Sony launched the first commercial lithium-ion battery in 1991, industry resources heavily favored lithium-based technologies, causing sodium-ion battery research to stagnate for decades. In 2021, CATL unveiled its first-generation sodium-ion battery along with an AB battery system integration solution, proposing a complementary pathway for lithium and sodium technologies. Sodium is abundantly available in seawater, salt deposits, and the Earth's crust, offering greater supply stability compared to critical minerals like lithium. According to the International Energy Agency (IEA), demand for minerals such as lithium continues to rise, and large-scale adoption of sodium-ion batteries could help mitigate supply chain risks associated with these critical raw materials. However, sodium-ion batteries still face challenges in cost control and supply chain development. Currently, sodium-ion batteries are primarily used in applications that prioritize cost, safety, and cycle life over high energy density. China is actively promoting power utilities to expand deployment of sodium-ion batteries in grid-scale energy storage. In 2026, CATL signed a large-scale sodium-ion battery energy storage cooperation agreement with HiPower, while BYD has also proactively expanded its sodium-ion battery production capacity. In the transportation sector, CATL has already introduced mass-produced vehicles equipped with sodium-ion batteries, and European automakers have begun exploring sodium-ion technology—though mainly for models not requiring long driving ranges. This strategic approach aims to avoid direct competition with lithium-ion batteries in high-energy-density markets and instead target application scenarios where lithium-ion technology holds less advantage. The rise of artificial intelligence (AI) is also creating new opportunities for sodium-ion batteries. Growing demand for stationary energy storage systems from AI data centers aligns well with sodium-ion batteries’ strengths in safety and cost-effectiveness. General Motors has partnered with an energy storage startup to develop sodium-ion battery systems for both grid applications and AI data centers. Nevertheless, uncertainties remain in the path toward commercialization. Natron Energy, a U.S.-based sodium-ion battery company, ceased operations due to financing difficulties—a reminder that commercializing the technology requires overcoming multiple hurdles, including funding and engineering scale-up. Additionally, recent declines in lithium prices have narrowed sodium-ion batteries’ cost advantage, and it will take time before their costs become competitive with those of lithium iron phosphate (LFP) batteries. Despite diverging views on its future outlook, some companies have already made early investments, aiming to secure a strategic position ahead of potential market shifts.