Market and product

Compiled by Bao Hien

The year 2026 marks an important turning point for sodium-ion batteries, an energy-storage technology widely regarded as one of the most viable candidates for reducing dependence on lithium, cobalt, and nickel, as well as on China-dominated supply chains. Several U.S. startups have reached concrete commercialization milestones, while policymakers are beginning to pay greater attention to the technology.

Why Sodium-Ion Has Become a Strategic Option

Unlike lithium-ion batteries, which rely on cobalt and nickel—two metals associated with environmental and labor concerns and whose mining and refining are largely dependent on overseas sources—sodium-ion batteries use sodium, a material derived from common salt that is abundant, inexpensive, and potentially available from domestic sources or a wider range of unrestricted trading partners.

Chemically, sodium-ion batteries are also considered safer and more stable, reducing the risk of fires and thermal runaway compared with lithium-ion batteries. The technology's main drawback, however, is its lower energy density, making it better suited to stationary storage applications than to weight-sensitive uses such as electric vehicles.

Concrete Commercial Progress from U.S. Startups

According to the Wall Street Journal, as cited by MarketScale, sodium-ion batteries—with little significant reliance on Chinese supply chains—have officially entered the commercial-scale production phase in 2026, with refining facilities already operating near or at full capacity.

One of the clearest examples is Unigrid, a U.S.-based sodium-ion battery developer, which has announced a breakthrough involving its proprietary sodium-cobalt oxide chemistry. The company's commercial-grade cells have achieved 5,000 full charge-discharge cycles at 100% depth of discharge while retaining more than 95% of their initial capacity. This corresponds to a projected lifetime of approximately 20,000 cycles and up to 25 years of operation, surpassing conventional lithium iron phosphate (LFP) batteries, which typically achieve around 12,000 cycles.

According to the company, the 25-year lifespan corresponds to the typical service life of solar panels, potentially eliminating the need for mid-life battery replacement—a factor that could significantly alter the economics of renewable-energy projects.

Unigrid began commercially exporting sodium-cobalt oxide battery cells in January 2026, becoming the first sodium-ion battery manufacturer outside China to export at this scale. The company uses a fabless business model, partnering with existing manufacturers rather than investing in an expensive gigafactory of its own.

Another approach is being pursued by Inlyte Energy with its iron-sodium battery technology. In partnership with Ervin Industries, the company is developing specialized iron powder for a system based on conversion chemistry between iron and sodium chloride. The system uses solid beta-alumina as the electrolyte and molten sodium aluminum chloride as the catholyte, with the goal of building a domestic supply chain based on materials readily available in the United States.

A Policy Advocacy Coalition

According to Energy Storage News, U.S. sodium-ion battery startups have formed a coalition, the American Battery Leadership Coalition (ABLC), to advocate for policy support. The coalition argues that the technology currently lags behind in terms of regulatory recognition, eligibility for manufacturing incentives, procurement rules that favor incumbent technologies, and dedicated funding for research, pilot projects, and commercialization.

According to the coalition, more than 90% of federal funding for battery development has gone to mature lithium-based projects, even as the United States continues to struggle to diversify its lithium-based supply chains.

On the materials side, Wanhua Chemical is reportedly replacing imported coconut-shell-based hard carbon anode material with two purpose-designed alternatives: a coal-based material, which offers lower costs, and a resin-based material, which provides greater consistency in quality.

The shift is expected to reduce anode costs from approximately $9,000–$10,000 per metric ton in 2024 to $5,000–$6,000 per ton in 2026, with the potential to fall below $4,000 per ton in the future.

Remaining Barriers

Despite this progress, the industry acknowledges that significant barriers remain. According to BATTERY TECH USA, commercial-scale sodium-ion battery manufacturing capacity in the United States is still very limited, while private investment in the sector remains at an early stage.

Lower energy density than lithium-ion batteries also continues to constrain the technology's adoption in mobile and other weight-sensitive applications.

Nevertheless, some industry experts argue that if the performance gap can be addressed, sodium-ion batteries' supply-chain and geopolitical advantages could put the technology in a favorable position for growth, particularly in large-scale stationary and grid-storage applications.