Sodium-ion batteries: suppliers, availability and applications

Sodium-ion batteries store energy by moving sodium ions between electrodes during charging and discharge. Commercial products and early deployments exist, but supply maturity varies sharply between manufacturers, chemistries and applications. Buyers should distinguish sample cells, qualified products, operating factories, announced capacity and accepted customer deliveries. As of 29 September 2026, a credible purchase depends on a deliverable specification, repeatable production and system support; sodium abundance alone does not establish a low-cost or geographically diversified battery supply.

Charge carrier

Sodium ions

Technology families

Layered oxides, polyanionic cathodes and Prussian-blue analogues

Commercial stage

Early commercial deployment; supplier-specific scale-up

Procurement boundary

Qualified cells and supported complete systems

What does the chemistry description tell a buyer?

Sodium-ion describes a family of rechargeable cells, not one standard product. Positive-electrode families include layered oxides, polyanionic materials and Prussian-blue analogues; many designs use hard carbon at the negative electrode. The formulation determines voltage, capacity, temperature behaviour and degradation. A buyer therefore needs the actual cell identity and test conditions before drawing conclusions from a result reported for another sodium chemistry.

The IEA's 2026 assessment records vehicle and stationary-storage applications, but reports that 2025 sodium-ion production was below 1% of lithium-ion production. It also identifies lower energy density and immature supply chains as constraints. This establishes a developing commercial category, not a universal substitute for an existing battery specification. Cell production, annual factory nameplate capacity and cumulative customer deliveries must remain separate measures.

Which suppliers have identifiable products or development routes?

CATL stated in April 2026 that its Naxtra sodium-ion programme had achieved GWh-level industrialisation, while placing full-scale mass production at the end of 2026. These are the company's own statements, and the latter remained a future milestone at this review date. An enquiry should ask which cell or pack can be contracted now, the delivery schedule and the acceptance evidence; the announcement is not proof that the planned output has already been delivered.

HiNa Battery identifies sodium-ion cells, electrode materials and electrolytes within its offering. Its Chinese website reports a sodium-ion mining-truck delivery in July 2026 and a September agreement with Korea's VOLTA. The delivery report and the agreement describe different milestones. Neither establishes a general-purpose inventory available in every export market. Verify the offered cell, local approvals, pack integration and the legal entity responsible for warranty support.

Tiamat lists cylindrical cells for power tools and small electromechanical systems and prismatic cells aimed at automotive and stationary applications. Its emphasis on power is relevant when brief high loads and frequent cycling matter more than maximum stored energy per kilogram. The catalogue establishes product positioning, while sample availability, qualified production lots and repeat-order lead times require confirmation for the intended programme.

Altris presents Prussian White cathode material alongside P-Series and E-Series cells. It describes its Uppsala operation as industrial pilot scale and refers to transfer into partner production lines. A materials qualification project, reference-cell evaluation and purchase of serially manufactured cells therefore require different contracts. Buyers should clarify which manufacturing organisation will produce their cells and which party controls process changes and guarantees the supplied material.

Unigrid presents sodium chromium oxide technology and a route for ordering samples. A sample programme can help establish electrochemical fit and pack-design requirements, but should not be interpreted as evidence of unrestricted volume supply. Ask for production-lot traceability and distinguish a requested engineering sample from the eventual saleable configuration. Confirm which performance values are measured, specified or still development targets.

Faradion describes non-aqueous sodium-ion technology for transport, stationary storage and backup power, and says it works with licensees and manufacturing partners. This is a technology and industrialisation route rather than proof of a directly orderable standard cell. A procurement team needs to identify the actual manufacturer, licence scope relevant to supply and service responsibilities. These six entries are a non-exhaustive supply map, not a ranking or endorsement.

Which applications warrant serious evaluation?

Stationary storage can tolerate a different mass and volume envelope from a passenger vehicle, while power tools and backup systems may value high-rate operation over long discharge duration. Cold-climate performance can also matter, but it must be tested at the cell and pack level. Record charging limits as well as discharge capability: maintaining output in the cold does not automatically establish that rapid charging is permissible under the same conditions.

The application comparison should use usable energy at the required power, temperature and end-of-life condition. A pack may need additional cells, enclosure volume or thermal control to meet the same service requirement. Conversely, a particular duty may not reward maximum energy density. The procurement objective is a supported energy or power service, with a defined failure response, rather than adoption of a chemistry label.

What manufacturing and supply-chain evidence matters?

The IEA finds strong concentration of existing and announced sodium-ion cell production in China. Removing lithium does not remove every critical-material dependency: the actual cathode composition and the processing locations still matter. Request the qualified sources for cathode material, hard carbon, electrolyte and separator, together with substitution rules. A change in material provenance can require fresh validation even when a product keeps the same commercial name.

Factory evidence should connect repeat production lots to the proposed cell specification. Review electrode consistency, moisture control, formation results, rejected-cell handling and statistical variation in capacity and resistance. CATL's announcement itself identifies water control, gas generation and foil adhesion as engineering challenges. Buyers need evidence that the chosen manufacturing route controls these issues; a long cycle-life test on selected laboratory cells cannot establish factory yield or shipment consistency.

How should cost and qualification be evaluated?

Compare installed systems, including power conversion, enclosure, thermal management, commissioning, replacement modules and disposal responsibilities. Separate quoted cost today from a forecast based on larger factories or different raw-material prices. Use the supplier's warranty conditions and measured degradation to estimate usable lifetime output, and test a slower deployment scenario. A cheap cell does not necessarily produce a cheaper supported installation if integration or replacement risk is higher.

Agree a bounded qualification programme using the real duty cycle and operating temperatures, with safety and transport testing appropriate to the product and jurisdiction. Record whether test results concern the cell, module or complete system. For layered-oxide processing questions, the cathode-washing guide examines a narrower materials problem; the dry-electrode guide considers production changes that still require cell-level validation.