Sodium-Ion Is Entering the Market.

Highlights

• CATL and BYD are scaling sodium-ion production in 2026, while China holds over 95% of announced global sodium-ion manufacturing capacity through 2030.
• Sodium-ion's strongest near-term opportunity is stationary energy storage, where system cost, safety, and cycle life matter more than energy density.
• Sodium-ion reduces exposure to lithium, cobalt, and nickel but does not replace rare-earth permanent magnets used in electric motors and generators.
• U.S. and European companies like Peak Energy, Tiamat, and Altris are building sodium-ion capacity, but announced factories are not yet operating at industrial scale.
• The strategic lesson from sodium-ion applies equally to rare earths: industrial dominance belongs to those who build reliable manufacturing depth, not just those with resources or inventions.

---

What the rise of sodium-ion batteries means for batteries, critical minerals and rare earths

Rare Earth Exchanges®, Bart Reijs, 9th August 2026

In 2023, The New York Times asked whether China could dominate sodium batteries, a potentially important alternative to lithium-ion. The premise was strategically important: if sodium-ion technology matured, it could reduce dependence on lithium and some other constrained battery materials—but China's established battery industry would be exceptionally well positioned to commercialize it. Three years later, that possibility is moving from industrial strategy to commercial reality. Sodium-ion remains a small part of the global battery market—total production in 2025 was less than 1% of lithium-ion production—but the technology is now entering commercial deployment. CATL has announced commercial-scale applications across vehicles and energy storage beginning in 2026, while other manufacturers are building capacity and preparing initial customer deliveries.iea (opens in a new tab)

The right conclusion is not that sodium-ion will replace lithium-ion. It will not, at least not across the full battery market. Nor does sodium-ion eliminate the strategic importance of rare earths. It does not. The more important development is that sodium-ion is becoming an industrial platform with different material requirements, different performance characteristics and a potentially different geographic distribution of supply chains.

That is good news.

Rare Earth Exchanges has addressed sodium-ion batteries nearly a dozen times since 2024–25. From the beginning, our argument has been that sodium-ion deserved attention not merely as another battery chemistry, but as a possible industrial platform with distinct economics, raw-material requirements and strategic implications.

In June 2025, China's Sodium-Ion Strategy: A Rare Earth Disruption in the Making examined China's use of sodium-ion technology in mass-market mobility applications, including electric scooters, as a route toward manufacturing experience and wider market adoption. The point was not that sodium-ion would make rare earths irrelevant. It was that battery chemistry, critical-mineral exposure and rare-earth dependence are separate questions that need to be analyzed separately.

A related Rare Earth Exchanges analysis emphasized that sodium-ion could lower exposure to lithium, cobalt and nickel in some applications, depending on the chemistry used, while doing little to solve China's dominance across the rare-earth value chain. Both observations remain valid.

What has changed is the evidence. Sodium-ion is no longer only a research topic or a technology-roadmap aspiration. It is entering the market—although commercial scale remains uneven, and much of the Western activity still consists of planned factories, prototypes and early customer programs rather than mature gigafactory production.

The question is therefore no longer whether sodium-ion can ever become commercially viable. The question is which companies and regions can manufacture it reliably, win customers and build enough supply-chain depth to turn it into a durable industrial business.

From alternative chemistry to industrial platform

The United States is beginning to build a sodium-ion position. Peak Energy is developing a sodium-ion energy-storage manufacturing facility in Sacramento with planned annual capacity of up to 4 GWh and production targeted for 2027. That is an important announcement, but it should be understood as planned capacity, not as current operating output.

Peak has also formed a strategic partnership with General Motors. GM Ventures has invested in the company, and GM is working on prototype sodium-ion cells for grid-scale storage. The significance lies less in the immediate volume of production than in the choice of market: both companies are focused on stationary storage rather than attempting to displace lithium-ion in every electric-vehicle application.

That strategy is rational. Battery markets are not one market.

Electric vehicles put a premium on energy density, weight, volume and packaging. A grid-storage battery next to a substation, solar farm, wind project or data center does not face the same constraints. In stationary applications, system cost, safety, cycle life, operating temperature, reliability and thermal-management requirements can matter more than battery weight. This is sodium-ion's opening.

Sodium is abundant, and many sodium-ion chemistries can avoid lithium entirely. Depending on the cathode and anode materials selected, they can also reduce or eliminate cobalt and nickel. That does not mean every sodium-ion battery is strategically uncomplicated. Hard carbon, electrolyte salts, separators, equipment and processing expertise remain important supply-chain nodes. But sodium-ion can materially diversify the mineral inputs used in parts of the battery sector.

Peak says its passively cooled architecture could reduce auxiliary energy consumption by up to 90% relative to conventional approaches. That is a company-specific claim, not an established industry benchmark, but it illustrates the commercial logic behind its stationary-storage strategy. The relevant comparison is not only cell cost or energy density; it is total system economics over the life of a storage asset.

Europe is pursuing several routes into the technology. France's Tiamat is developing a sodium-ion factory program with a planned eventual capacity of 5 GWh, beginning with a smaller first phase. Sweden's Altris is developing sodium-ion cathode technology and associated industrial partnerships. Faradion, one of the early British sodium-ion pioneers, is now part of India's Reliance Industries.

These projects should not be overstated. Announced capacity is not the same as delivered capacity, and technical progress is not the same as bankable industrial scale. But the pattern matters: sodium-ion is no longer a single-company or single-country proposition. Several industrial ecosystems are attempting to establish positions at the same time.

China, however, remains far ahead. CATL has announced commercial-scale deployment of its sodium-ion technology across several sectors beginning in 2026. BYD began construction of its first sodium-ion battery plant in 2024, aimed at electric vehicles, grid-scale storage and industrial applications. The International Energy Agency estimates that nearly all existing global sodium-ion manufacturing capacity is in China and that China accounts for more than 95% of announced capacity expected by 2030.iea (opens in a new tab)

That should not be interpreted as proof that Western companies have already missed the opportunity. It should be interpreted more soberly:

China has an enormous head start in battery manufacturing, materials, equipment, supply-chain integration and production experience. Western companies still have an industrial window, but the window will not remain open indefinitely.

Why stationary storage may come first

Sodium-ion's greatest near-term commercial potential may be in stationary storage rather than long-range electric vehicles.

Sodium-ion batteries generally have lower energy density than leading lithium-ion technologies. The International Energy Agency notes that this remains a material constraint. It is one reason sodium-ion is less compelling where every kilogram and cubic centimeter matters, such as in long-range passenger vehicles.iea (opens in a new tab)

But stationary storage is a different proposition. A heavier battery can still be commercially attractive if it offers adequate performance, strong safety characteristics, long cycle life, reliable operation in demanding temperatures and competitive system-level economics.

This is particularly relevant for renewable-energy integration, grid balancing, industrial backup power and data centers. As electricity demand rises and grids absorb more variable renewable generation, storage becomes increasingly valuable. Sodium-ion does not need to outperform lithium-ion everywhere to become strategically significant. It only needs to be competitive in selected, large and fast-growing applications.

Cost remains uncertain. Some manufacturers expect sodium-ion to reach cost parity with lithium iron phosphate batteries quickly. Other analysts believe parity could take much longer, particularly while lithium prices remain subdued. Sodium-ion should therefore be viewed as a developing competitive option, not as an already cheaper universal substitute for lithium-ion.iea+1

The likely outcome is a more chemically diverse battery market. Lithium-ion will remain dominant in many applications, especially where energy density is essential. Sodium-ion may win share where abundant materials, safety, low-temperature performance and system-level economics matter more.

That is a much more credible proposition than claiming that sodium-ion is about to replace lithium-ion everywhere.

What sodium-ion means for rare earths

This is where the debate needs greater precision. Lithium, cobalt, nickel and rare earths are frequently grouped together under the heading of critical minerals. They are not interchangeable. Sodium-ion could alter demand for lithium and, depending on the chemistry, for cobalt and nickel. It does not substitute for neodymium-praseodymium, dysprosium or terbium in permanent magnets.

Those materials perform a completely different function. They provide the magnetic properties required by many high-performance electric motors, generators, industrial drives and defense systems. The U.S. Department of Energy has stated that almost all hybrid and plug-in vehicles use rare-earth permanent magnets in their traction motors, though alternative motor designs are also being developed.energy (opens in a new tab)

The long-term rare-earth case is therefore not fundamentally a battery thesis. It is an electrification, automation and high-performance-motor thesis. That thesis remains plausible, but it is not automatic. It will depend on the pace of electrification, adoption of permanent-magnet motors, substitution, recycling, efficiency gains and technology choices in vehicles, wind turbines and industry.

Sodium-ion could nevertheless support the broader electrification case indirectly. If it helps reduce the cost or complexity of stationary storage, it could enable more renewable generation, greater grid flexibility and more electrified industrial infrastructure. That could support demand for motors, drives, generators and equipment in which high-performance magnets remain important.

The connection is indirect. An additional gigawatt-hour of sodium-ion storage does not automatically produce a corresponding increase in NdPr demand. Wind turbines use different generator architectures, and electric motors can be designed without rare-earth magnets.

The more defensible argument is that sodium-ion can reduce exposure to one set of mineral constraints while potentially supporting the wider electrification system in which permanent magnets remain strategically important.

The real opportunity is industrial

The most encouraging aspect of the sodium-ion story is not the chemistry itself. It is that the industry is still young enough for new entrants to matter.

The West's battery problem has often been described as a failure of innovation. That is too narrow. The United States and Europe contributed substantially to lithium-ion science and engineering, but China built much of the industrial ecosystem around the technology: cell manufacturing, cathode and anode materials, equipment, supply chains and enormous production capacity.

Sodium-ion offers a chance to approach the next technology cycle differently.

But it requires realism. A laboratory breakthrough is not a supply chain. A pilot line is not a gigafactory. An announced factory is not reliable commercial output. A memorandum of understanding is not a qualified, repeatable customer relationship. A technology becomes strategically important when companies can manufacture it consistently, when customers can buy it at competitive prices, and when upstream materials, equipment, workforce, financing and logistics can support production at scale.

That is the transition sodium-ion companies are attempting now.

Rare-earth companies face the same challenge. China's rare-earth dominance is not primarily a geological story. It is a story of industrial depth. China has major positions in mining, separation, metal production, alloy manufacturing, permanent-magnet production and recycling. The International Energy Agency reports that China accounted for approximately 94% of global sintered permanent-magnet production in 2024.iea (opens in a new tab) For companies in the United States, Canada and Europe, the strategic prize is therefore not simply another rare-earth mine. It is competitive capacity in the downstream stages that customers need: separation, metal production, alloy manufacture, permanent magnets and recycling.

Canada is working to establish this type of capability through the Saskatchewan Research Council's rare-earth processing facility, designed to produce magnet-grade NdPr metal as well as dysprosium and terbium oxides. The European Union's Critical Raw Materials Act sets 2030 benchmarks for domestic extraction, processing and recycling, but those targets are policy objectives rather than proof that the necessary capacity has already been built.

The United States has also adopted more aggressive industrial-policy tools. In 2025, the Department of Defense entered into an agreement with MP Materials that included a 10-year NdPr price-floor commitment and support for domestic magnet manufacturing. The purpose is to help new supply chains survive the period in which they must reach scale, qualify products and compete with entrenched Chinese suppliers.mpmaterials (opens in a new tab)

This is not an argument for permanent insulation from competition. It is an argument for building industrial capability before strategic dependence becomes a crisis. The next question is scale. Sodium-ion's relevance to rare-earth strategy lies in the lesson it offers.

The future does not belong automatically to the country that invents a technology first. Nor does it belong automatically to the country with mineral resources in the ground. It belongs to the companies and regions that can transform technology and resources into reliable industrial capacity.

Sodium-ion may become an important part of a more diverse global battery market. Its immediate role is likely to be strongest in stationary storage, low-cost mobility and other applications where energy density is less decisive than system economics, safety and material availability. Lithium-ion will remain indispensable in many markets. Other battery chemistries will continue to emerge. Sodium-ion's significance is not that it makes lithium irrelevant. It is that it adds another viable path for battery storage and another opportunity to build strategically important industrial capability.

The same principle applies to rare earths. Rare-earth separation and permanent-magnet manufacturing are strategic not because they are fashionable critical-mineral themes, but because they are concentrated industrial bottlenecks. The challenge for Western industry is to identify those bottlenecks early enough, invest at sufficient scale and build the customer, manufacturing and policy ecosystem required to compete. The encouraging message from sodium-ion is not that the West has caught up with China. It is that new strategic industries can still be built—provided technology is combined with capital, manufacturing, customers, supply-chain depth and sustained policy support. The race is no longer simply about who invented the technology first.

It is about who can turn it into an industry.

Sources

• The New York Times, "China Could Dominate Sodium Batteries, the Next Big …" (April 12, 2023).nytimes (opens in a new tab)
• International Energy Agency, "Sodium-ion battery momentum grows, but challenges remain" (July 10, 2026).iea (opens in a new tab)
• Nature, "Beyond lithium: how sodium-ion batteries could change the …" (July 15, 2026).nature (opens in a new tab)
• International Energy Agency, Rare Earth Elements: Executive Summary.iea (opens in a new tab)
• U.S. Department of Energy, "Electric Motors Research and Development."energy (opens in a new tab)
• Peak Energy and General Motors partnership reporting.energy-storage+1
• Tiamat sodium-ion factory reporting.pv-magazine+1
• Saskatchewan Research Council, "Rare Earth Processing Facility."src.sk (opens in a new tab)
• European Commission, "Critical Raw Materials Act."single-market-economy.ec.europa (opens in a new tab)
• MP Materials, Department of Defense public-private partnership announcement.mpmaterials (opens in a new tab)
• Rare Earth Exchanges, "Critical Minerals & Energy: Sodium-Ion Batteries A Viable …" (May 11, 2025).rareearthexchanges
• Rare Earth Exchanges, "China's Sodium-Ion Strategy: A Rare Earth Disruption in the Making" (June 9, 2025).