Sodium-ion (Na-ion) batteries are creating a "wow" factor because they are a potentially cheaper, more sustainable, and safer alternative to lithium-ion batteries, with notable advancements in performance, such as fast charging and better cold-temperature performance. While they currently have lower energy density than some lithium-ion batteries, they are becoming a promising technology for large-scale energy storage like electric grids, as well as for some vehicles and devices.
Explore the rise of sodium-ion batteries (SIB/Na-ion) — cheaper, safer, and built from abundant materials like iron, carbon, and salt. This video breaks down how SIBs work, key chemistries (NFPP, NASICON, Prussian blue analogs), advantages vs. Li-ion, and recent breakthroughs from UCSD/UChicago, JNCASR, BYD, CATL, Altris, Faradion, and more.
Learn about fast-charging, solid-state anode‑free designs, grid-scale potential, and real-world commercialization efforts across Germany, China, India, and Australia. Perfect for tech-curious viewers wanting a clear snapshot of the sodium battery revolution.
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SIBs received academic and commercial interest in the 2010s and early 2020s, largely due to lithium's high cost, uneven geographic distribution, and environmentally-damaging extraction process. Unlike lithium, sodium is abundant, particularly in saltwater.
SIB cells consist of a cathode based on a sodium-based material, an anode (not necessarily a sodium-based material) and a liquid electrolyte containing dissociated sodium salts in polar protic or aprotic solvents. During charging, sodium ions move from the cathode to the anode while electrons travel through the external circuit. During discharge, the reverse process occurs.
Sodium-ion batteries have several advantages over competing battery technologies. Compared to lithium-ion batteries, sodium-ion batteries have somewhat lower cost, better safety characteristics (for the aqueous versions), and similar power delivery characteristics, but also a lower energy density (especially the aqueous versions).
Companies around the world have been working to develop commercially viable sodium-ion batteries.
In July 2024, the University of Chicago and UC San Diego developed an anode-free sodium solid-state battery that they claimed was cheaper, safer, fast charging, and high capacity.
A research team at the Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), an autonomous institute of the Department of Science and Technology (DST) has developed a super-fast charging sodium-ion battery (SIB) based on a NASICON-type cathode and anode material, that can charge up to 80% in just six minutes and last over 3000 charge cycles.
Australia's Altech is building a 120 MWh plant in Germany.
Germany invested €1.3 million in a sodium-ion project with BASF and Mercedes-Benz.
Altris AB was founded by Associate Professor Reza Younesi, his former PhD student, Ronnie Mogensen, and Associate Professor William Brant as a spin-off from Uppsala University, Sweden launched in 2017 as part of research efforts from the team on sodium-ion batteries. Altris holds patents on non-flammable fluorine-free electrolytes consisting of NaBOB in alkyl-phosphate solvents, Prussian white cathode, and cell production. Clarios is partnering to produce batteries using Altris technology.
BYD in 2023 invested $1.4B USD into the construction of a sodium-ion battery plant in Xuzhou with an annual output of 30 GWh.
Chinese battery manufacturer CATL (world's largest EV battery maker) announced in 2021 that it would bring a sodium-ion based battery to market by 2023. It uses Prussian blue analogue for the positive electrode and porous carbon for the negative electrode. They claimed a specific energy density of 160 Wh/kg in their first generation battery.
Faradion Limited is a subsidiary of India's Reliance Industries. Its cell design uses oxide cathodes with hard carbon anode and a liquid electrolyte. Their pouch cells have energy densities comparable to commercial Li-ion batteries (160 Wh/kg at cell-level), with good rate performance up to 3C, and cycle lives of 300 (100% depth of discharge) to over 1,000 cycles (80% depth of discharge). Its battery packs have demonstrated use for e-bike and e-scooter applications. They demonstrated transporting sodium-ion cells in the shorted state (at 0 V), eliminating risks from commercial transport of such cells.[93] It is partnering with AMTE Power plc (formerly known as AGM Batteries Limited).
The future for sodium-ion batteries is bright, driven by their lower cost, abundance of sodium, and improving performance, making them a strong contender for grid-scale energy storage and budget-friendly electric vehicles. Market growth is projected to be substantial, with forecasts showing significant expansion in annual production and market value over the next decade. Key challenges remain, such as increasing energy density and cycle life, but ongoing research and development are rapidly addressing these issues, and some manufacturers are already producing them for commercial use.
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