[Advanced Materials] Expert deep dive on sodium-ion batteries: after leaving the lab, can they change the future of energy? | 2026 Top 10 Breakthrough

[Advanced Materials] Expert deep dive on sodium-ion batteries: after leaving the lab, can they change the future of energy? | 2026 Top 10 Breakthrough

Over the next 3-5 years, the trajectory of sodium-ion batteries can be summed up in three points: first, technical performance will gradually approach the level of lithium iron phosphate (LFP); second, the industry chain will enter a phase of standardization and cost optimization, forming its own dedicated equipment system and supply chain; third, applications will move from niche scenarios into mainstream energy storage systems, becoming an important pillar of electrochemical storage. Sodium-ion batteries are expected to round out the global energy storage landscape and become an important part of the energy system.

The independent closed loop and reshaped scenarios for sodium batteries

The sodium-ion battery industry is currently at an important turning point, moving from technical demonstration to large-scale commercial deployment — it's in the acceleration phase.

2023 was seen as the "first year of sodium batteries," marking the point when products truly began reaching the market. That same year, not only did megawatt-hour-scale storage stations built by companies like HiNa Battery go into operation, but the first industry standard for sodium-ion batteries was also released for public comment, laying the groundwork for industrialization. It's now widely agreed that 2024-2025 is the key stage where technical breakthroughs turn into industrialization, and this year is a core node in the commercialization process.

Looking at application prospects, sodium-ion batteries suit large-scale storage installations. The second phase of China's first large-capacity sodium-ion battery storage station (the Guangxi Fulin station) was commissioned in October 2025, marking a substantive step forward for their use in energy storage.

At present, multiple technical routes are competing in a healthy way. Ultimately, the winning approach will be the one whose specific material system and process are most compatible with sodium batteries, with the lowest overall cost and good overall performance, enabling scaled production and commercial application.

At the same time, environmental impact assessment has drawn widespread attention. On the cathode side, mainstream technical routes generally avoid high-cost, high-environmental-risk heavy metal elements, turning instead to more abundant, less toxic elements like iron, manganese, and copper. And given the drawbacks of traditional fluorine-containing electrolytes in terms of cost, toxicity, and recycling, research into fluorine-free electrolytes has become a current hot topic.

Mainstream cathode materials don't need the cobalt, nickel, and other metals that carry high environmental costs in lithium batteries, and both the cathode and anode of sodium batteries can use aluminum foil, which simplifies battery disassembly and sorting and lowers recycling complexity and cost. Sodium batteries are shifting from "substitute player" to "important role."

The cathode, anode, electrolyte, and current collectors used in sodium and lithium batteries all differ. Lithium battery recycling mainly extracts metals like cobalt, nickel, and lithium, while sodium battery recycling extracts iron, manganese, and copper; the sodium in the cathode itself has very low recycling value. So from a techno-economic standpoint, the future will inevitably bring recycling technology standards and a closed-loop industry chain designed specifically and rationally for sodium-ion batteries, independent of lithium batteries.

Right now sodium and lithium batteries complement each other. Lithium-sodium complementarity forms a more reliable safety net in terms of resource security, supply chain resilience, application scenarios, and techno-economics. It reduces the energy system's absolute dependence on any single strategic resource and gives the whole battery supply chain more buffer room for cost adjustment.

Also, the ultimate technical challenge the industry must overcome is that sodium batteries should establish their own technical standards, dedicated supply chain, and recycling system as early as possible.

Especially in core areas like hard carbon anodes, fluorine-free electrolytes, and direct regeneration recycling technology, dedicated and efficient industry chains urgently need to be developed.