Sodium-ion batteries are moving from emerging technology toward commercial-scale deployment. With strong low-temperature performance, abundant sodium resources and growing manufacturing capacity, sodium-ion technology is becoming an important complement to lithium-ion batteries.

For battery brands, OEMs, equipment manufacturers, energy-storage companies and distributors, the key question is not whether sodium-ion batteries will replace lithium-ion, but where sodium-ion technology provides the best technical and commercial value.

According to the International Energy Agency (IEA), leading sodium-ion cells can retain around 90% of nominal capacity at -40°C, while the latest cells can reach approximately 175 Wh/kg, compared with around 205 Wh/kg for LFP cells.

These characteristics make sodium-ion batteries particularly attractive for applications where low-temperature performance, power capability, supply-chain diversification or cost are more important than maximum energy density.

What Is a Sodium-Ion Battery?

A sodium-ion battery (SIB) is a rechargeable battery that uses sodium ions as the charge carrier between the cathode and anode.

Its structure is similar to a lithium-ion battery and typically includes sodium-ion cells, cathode and anode materials, electrolyte, separator, BMS, enclosure and electrical interfaces.

Commercial sodium-ion technologies use cathode materials such as layered metal oxides, polyanionic compounds and Prussian blue/white analogues, with hard carbon widely used as an anode.

Because sodium-ion batteries share similarities with lithium-ion manufacturing processes, existing battery manufacturing infrastructure can potentially be leveraged.

Why Are Sodium-Ion Batteries Attracting Attention?

1. Abundant Sodium Resources

Sodium is widely available and does not depend directly on lithium resources. This provides an opportunity to diversify battery chemistry and reduce exposure to lithium supply risks.

2. Strong Low-Temperature Performance

Low-temperature performance is one of sodium-ion’s major advantages. Leading sodium-ion technology can retain approximately 90% nominal capacity at -40°C, creating opportunities for:

• · Vehicles and trucks
• · Marine equipment
• · Agricultural machinery
• · Industrial equipment
• · Cold-region energy storage
• · Backup power

Actual performance depends on cell chemistry, BMS, discharge rate and pack design.

3. Growing Commercialization

Sodium-ion batteries are moving beyond laboratory development. In 2025, CATL launched its Naxtra sodium-ion battery brand and announced mass-production plans, with reported energy density of approximately 175 Wh/kg.

The IEA describes sodium-ion batteries as entering the scale-up phase, with major manufacturers investing in commercialization.

4. Supply-Chain Diversification

Sodium-ion gives battery manufacturers and large energy users another chemistry option, helping reduce dependence on a single battery technology.

It is therefore increasingly viewed as a complement to lithium-ion rather than a universal replacement.

Sodium-Ion vs. Lithium-Ion Batteries

Neither chemistry is universally better. The right choice depends on energy density, operating temperature, power requirements, cycle life, space, charging requirements and total cost of ownership.

What Is the Energy Density of Sodium-Ion Batteries?

Energy density remains one of sodium-ion’s main limitations.

According to the IEA, leading sodium-ion cells can reach approximately 175 Wh/kg, compared with around 205 Wh/kg for LFP and up to approximately 265 Wh/kg for NMC.

Lithium-ion therefore remains preferable where weight and volume are critical. Sodium-ion can be more competitive in applications such as:

• · Stationary energy storage
• · Starter batteries
• · Industrial equipment
• · Backup power
• · Cold-climate applications

Where Are Sodium-Ion Batteries Used?

Sodium-Ion Starter Batteries

Starter batteries require high instantaneous power rather than maximum energy density.

Potential applications include cars, trucks, commercial vehicles, agricultural machinery, heavy equipment and marine equipment.

Key specifications include CCA, peak current, voltage, dimensions and low-temperature starting performance.

Stationary Energy Storage

Sodium-ion batteries are being developed for:

• · Residential ESS
• · Commercial and industrial ESS
• · Renewable energy storage
• · Grid storage
• · Backup power
• · Telecom and UPS systems

Because stationary applications are less sensitive to weight, energy density is less restrictive.

Industrial Equipment

Potential applications include forklifts, AGVs, AMRs, industrial vehicles, robotics and outdoor machinery.

Cold-Climate Applications

Sodium-ion’s low-temperature characteristics make it attractive for northern regions, outdoor equipment, cold-chain facilities, refrigerated environments and winter vehicle operation.

For commercial projects, buyers should request actual performance data under their required temperature and discharge conditions.

Why Is China Leading Sodium-Ion Battery Manufacturing?

China has developed one of the world’s largest battery manufacturing ecosystems, covering materials, cells, BMS, battery packs, testing, equipment and engineering.

According to the IEA, nearly all existing global sodium-ion manufacturing capacity is currently located in China. Based on existing and announced projects, China is expected to account for more than 95% of global sodium-ion manufacturing capacity in 2030.

This makes China an important sourcing and manufacturing hub for international sodium-ion battery buyers.

What Should B2B Buyers Look for in a Sodium-Ion Battery Manufacturer?

Selecting a sodium-ion battery supplier requires more than comparing prices.

R&D and Engineering

A capable manufacturer should have expertise in cell selection, battery architecture, BMS development, electrical and mechanical design, thermal management and communication systems.

Manufacturing Capability

Evaluate production facilities, automated manufacturing, testing, quality control, traceability and mass-production capability.

OEM/ODM Customization

For B2B projects, customization may include:

Voltage · Capacity · Dimensions · CCA · BMS · CAN · RS485 · Bluetooth · Terminals · Enclosure · Branding

Application Experience

Starter batteries, deep-cycle batteries and ESS systems require different designs. An experienced manufacturer should understand the complete application rather than simply supplying battery packs.

Testing & Certification

Depending on the application and target market, buyers may require UN38.3, MSDS/SDS, CE, IEC-related testing and transportation documentation.

Propow Energy: Sodium-Ion Battery Manufacturer in China

Propow Energy is a China-based battery manufacturer and battery solutions provider specializing in R&D, manufacturing, OEM/ODM customization and application engineering.

Propow serves global B2B customers including battery brands, OEMs, equipment manufacturers, distributors, wholesalers and energy-storage companies.

Its sodium-ion battery solutions focus on application-specific engineering, rather than positioning sodium-ion as a universal replacement for lithium-ion.

Customization can cover:

Voltage + Capacity + Dimensions + BMS + CCA + Communication + Terminals + Enclosure + Branding

Propow’s development process can include:

Application → Specification → Engineering → Prototype → Testing → Validation → Certification → Mass Production

The company also develops 12V sodium-ion cranking batteries in multiple capacity and CCA configurations for vehicles, commercial vehicles, agricultural machinery and marine applications.

Sodium-Ion Starter Battery vs. Deep-Cycle Battery

A battery optimized for starting should not automatically be used for deep-cycle applications without validation.

Are Sodium-Ion Batteries Commercially Available in 2026?

Yes.

Sodium-ion batteries have moved beyond laboratory development and into commercial products and industrial scale-up.

However, sodium-ion remains less mature than lithium-ion.

The most realistic view for 2026 is:

Sodium-ion is a commercially emerging battery chemistry with strong potential in selected applications—not a universal replacement for lithium-ion.

Are Sodium-Ion Batteries Cheaper Than Lithium-Ion?

Not necessarily today.

Although sodium is abundant and can reduce direct dependence on lithium, lithium-ion benefits from mature supply chains and enormous manufacturing scale.

B2B buyers should therefore compare total cost of ownership, including purchase price, cycle life, maintenance, energy efficiency, temperature performance and replacement cost.

The Future of Sodium-Ion Battery Manufacturing

The future battery market is unlikely to rely on a single chemistry.

Lithium-ion will continue to dominate applications requiring:

High Energy Density + Mature Manufacturing + Broad Supply Chain

Sodium-ion is likely to expand where:

Low-Temperature Performance + Supply-Chain Diversification + Power Capability + Application-Specific Economics

create additional value.

The key principle is simple:

The future of batteries is not about one chemistry replacing everything. It is about choosing the right chemistry for the right application.

Conclusion

Sodium-ion batteries are entering an important stage of commercial development.

Their key advantages include:

• · Abundant sodium resources
• · Strong low-temperature performance
• · Reduced direct dependence on lithium
• · Supply-chain diversification
• · Growing manufacturing capacity

Their main limitations include lower energy density, less mature supply chains and application-dependent cost competitiveness.

For B2B buyers, the opportunity is to identify applications where sodium-ion’s advantages outweigh its limitations and work with an experienced manufacturer to move from technology evaluation to commercial deployment.

Looking for a Sodium-Ion Battery Manufacturer in China?

Propow Energy works with battery brands, OEMs, equipment manufacturers, distributors and energy-storage companies to develop customized sodium-ion battery solutions.

Contact Propow Energy to discuss your sodium-ion battery project, OEM/ODM requirements or bulk purchasing needs.