Major sodium-ion battery milestone passed by California startup Unigrid aces Hyundais safety tests down to -20C as experts call tech a 'compelling alternative' to lithium-ion

Date:
Sun, 30 Aug 2026 00:00:00 +0000

Description:
Sodium-ion battery technology promises to improve on lithium-ion in numerous areas, though challenges remain.

FULL STORY ======================================================================Copy link Facebook X Whatsapp Reddit Pinterest Flipboard Threads Email Share this article 0 Join the conversation Follow us Add us as a preferred source on Google Newsletter Subscribe to our newsletter Lithium-ion batteries are one
of the most successful technologies ever invented, and now span everything from smartphones to power stations but the technology is not without its flaws and limitations, and scientists are now busy trying to figure out which type of next-gen battery will take over next.

One of the big safety risks with lithium-ion is thermal runaway, causing overheating and fires, and some future battery technologies are focusing on this in particular. One of the leading contenders, sodium-ion, just passed a major safety test at Hyundai, while this battery type is also showing lots of promise overall. Here's what you need to know about the recent breakthrough we've seen with sodium-ion technology, what its benefits are more broadly,
and how it might eventually overtake lithium-ion as the default battery chemistry of choice. Latest Videos From TechRadar Watch full video here: Hyundai, Unigrid, and the thermal runway We know that lithium-ion batteries are a fire risk , and that's specifically where a US start-up called Unigrid is directing its attention. The company has developed a type of sodium-ion battery, using sodium chromium oxide (NCO) cell chemistry, which has just
been given the safety seal of approval by South Korean giant Hyundai.

According to Unigrid (via Interesting Engineering ), the batteries have now achieved "critical technology validation milestones" after being put to the test by Hyundai's technical evaluation program. Stringent safety experiments were completed with no fire and no thermal propagation (where fire spreads between batteries, an important consideration in factories and industrial use). You may like GM is getting in on the data center game - by making batteries Scientists develop next-gen zinc-iodine batteries that charge in 3 minutes The water-based battery that could turn whole data centers into
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What's more, the sodium-ion NCO batteries showed "minimal capacity degradation" after sustained continuous cycling, while the units also held up under a wide range of temperatures: from -20C to 60C (that's -4F to 140F). This is only one set of tests in a limited number of scenarios, but the tech has passed with an excellent grade. Today's gadgets make use of lithium-ion (Image credit: Future/Lance Ulanoff) The key change here is given away in the name: sodium ions rather than lithium ions are shuttling between the positive electrode (cathode) and negative electrode (anode). Both battery technologies have actually been around for about the same length of time, but the superior energy density of lithium-ion is why it's won out in recent years. Now sodium-ion is increasingly being looked at again. Get daily insight, inspiration and deals in your inbox Sign up for breaking news, reviews, opinion, top tech deals, and more. Contact me with news and offers from other Future brands Receive email from us on behalf of our trusted partners or sponsors By submitting your information you agree to the Terms & Conditions and Privacy Policy and are aged 16 or over.

As well as potentially improved safety from a thermal runaway perspective, another key difference is that sodium is much more abundant and widely available than lithium is. That's becoming a more important consideration as the planet creaks under increasing environmental strain, and it means the raw materials are more affordable (though the overall cost of sodium-ion
batteries remains higher than lithium-ion for now).

There's still a lot of work to do, as a 2026 review published in the Journals of Materials Chemistry A points out. The energy density problem remains, for example, which makes sodium-ion a more viable option for large-scale energy storage, rather than the batteries we've got inside our phones and tablets. The future of sodium-ion With all of that in mind, the thinking is that sodium-ion is more likely to exist alongside lithium-ion, at least in the shorter term. While the new batteries like those developed by Unigrid have plenty of potential, there are also plenty of challenges that need
addressing. What to read next Samsung explains how it put bigger and better batteries into its new Galaxy foldables The 8-Hour challenge: SK On says solid-state robot batteries must justify a 4x manufacturing cost jump to replace 'inferior' lithium-ion Inside the "disappearing battery" revolution how forest-powered supercapacitors could keep wireless sensors running for years

As reported in Nature , the world's largest battery manufacturer CATL has announced that it'll start mass producing sodium-ion batteries before the end of 2026. The Chinese manufacturer says it has deals in place with both a car maker and a provider of energy-storage stations for electricity grids.

However, the sodium-ion ingredient mix is different in the CATL batteries: it's using a sodium-ion technology known as Prussian white, which is potentially cheaper to make, easier to manufacture at scale, and longer-lasting, though there are questions over the energy density of these batteries. The main difference in sodium-ion is the ingredients (Image
credit: Nature) The good news is that rapid progress is being made in the areas where sodium-ion batteries still fall short. Researchers are looking closely at the different mixtures and chemical combinations that might work best for this and some scientists have even floated the idea of removing the fixed anode materials in the battery altogether (so rechargeable batteries would work more like disposable batteries).

There are a lot of variables involved, from the stability of the world
economy to the power demands that AI data centers continue to put on global energy networks, but we can expect to hear about plenty more breakthroughs with sodium-ion battery technology in the coming years.

"Sodium-ion batteries have emerged as a compelling alternative to lithium-ion systems, particularly for stationary storage and cost-sensitive mobility applications," writes Abu Faizal Abdul Salam et al in the Journal of
Materials Chemistry A . "Continued efforts in materials research, standardization of testing methodologies, and real-world validation are pivotal to accelerate their path toward commercialization." Follow TechRadar on Google News and add us as a preferred source to get our expert news, reviews, and opinion in your feeds.



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Link to news story: https://www.techradar.com/tech/major-sodium-ion-battery-milestone-passed-by-ca lifornia-startup-unigrid-aces-hyundais-fire-safety-tests-down-to-20c-as-expert s-call-tech-a-compelling-alternative-to-lithium-ion


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