Natron Vitality, a Santa Clara, California-based sodium-ion battery startup, ceased operation on 3 September as a consequence of funding points. Only a yr in the past, the corporate made headlines for its plans to construct a first-of-its-kind US $1.4 billion manufacturing unit in North Carolina to fabricate as much as 14 gigawatt-hours of sodium-ion batteries. Whereas consultants say Natron’s closure shouldn’t be taken as a harbinger for the remainder of the rising business in the US, they acknowledge that the West is behind China, which is leveraging its dominance in lithium-ion batteries to forge forward on sodium-ion battery manufacturing.
Within the U.S., sodium-ion startups like Natron, which launched in 2012, are likely to depend on goodwill from funders, says Okay.M. Abraham, a retired analysis professor at Northeastern College in Boston and CTO of lithium-ion battery consulting agency E-KEM Sciences. This may pose challenges for corporations when funding timelines outpace improvements.
“Firms aren’t in a position to make progress shortly sufficient to maintain up with strain exerted by the traders,” he says.
Natron’s Pioneering Prussian Blue Batteries
Till just lately, Natron was seen as a frontrunner of the pack within the U.S. sodium-ion market. A part of the corporate’s attraction was its pioneering method to low-cost electrodes, the conductors on the battery’s optimistic and unfavorable terminals, which make contact with the non-metallic a part of the circuit. The corporate used Prussian Blue, a pigment present in paints and dyes, to make each the cathode and anode for its three battery methods. Along with having a low materials price, Prussian Blue’s chemical construction has giant pores, serving to it facilitate quicker ion switch between the electrodes.
Natron was the first on the earth to commercialize a sodium-ion battery utilizing Prussian Blue, an actual feat contemplating China’s battery manufacturing would possibly, says Tyler Evans, co-founder and CEO of Mana Battery, a Broomfield, Colorado-based sodium-ion battery cell startup that launched in 2023.
“They have been doing it within the West, and so they have been scaling a know-how that was comparatively low vitality density for a really particular market section,” says Evans about Natron’s merchandise.
Mana is one other U.S. startup specializing in bringing sodium-ion batteries to market.Nicholas Singstock/Mana
That market included grid storage, knowledge heart energy backups, and electrical automobile charging stations—large-scale stationary functions the place attributes like security and value rank increased than vitality density. Natron’s success on this area, together with its plans for the North Carolina manufacturing unit, prompted questions on whether or not sodium-ion may emerge as a direct alternative for lithium-ion batteries. United Airways and Chevron have been on the record of Natron’s traders.
However Evans says scaling up a low-energy density product whereas constructing out manufacturing strains is pricey. “If you concentrate on constructing a producing facility the place you need to produce 10 gigawatt hours of batteries, in case your vitality density may be very low, producing an equal variety of batteries requires extra manufacturing strains,” Evans says.
“If you concentrate on constructing a producing facility the place you need to produce a gigawatt-hour of battery manufacturing capability, in case your vitality density per battery cell may be very low, producing that capability requires extra manufacturing strains,” Evans says, that means considerably extra capital and operational expenditure in an already capital-intensive enterprise.
In 2023, Natron’s methods made it to market. The corporate partnered with Encorp to deploy the business’s first multi-megawatt class energy platform for industrial functions. A yr later, in 2024, Natron opened the U.S.’s first industrial scale manufacturing facility in Holland, Michigan to produce knowledge facilities with vitality storage. The U.S. Division of Vitality’s ARPA-E program offered $19.8 million to Natron as a part of a $300 million facility improve to transition from lithium-ion battery manufacturing to sodium-ion battery manufacturing. That facility shut its doorways concurrently Natron’s California headquarters on 3 September.
A request for remark from Natron resulted in an automatic message to contact the corporate’s major shareholder, Sherwood Companions. Sherwood Companions didn’t reply to a request for remark.
Sodium-Ion vs. Lithium-Ion Battery Prices
Adrian Yao is the founder and workforce lead of Stanford’s STEER initiative, a DOE-funded analysis program. He’s additionally an writer of a January 2025 paper assessing how sodium-ion batteries measure as much as lithium-ion batteries by way of know-how and value.
Whereas he was impressed with Natron’s know-how and product, he says that the corporate could have been forward of the curve on the info heart market area of interest it had carved out for itself. “Hyperscalers proper now, their major concern is simply getting related and constructing knowledge facilities,” says Yao. “I believe timing on that cycle could also be early, and it’s unlucky issues don’t all the time work out.”
Natron joins Stanford spin-out Bedrock Supplies because the second sodium-ion firm to fold this yr. Bedrock cited market and innovation challenges for its April closure.
“The battery enterprise may be very troublesome. There are lots of tombstones,” says Andrew Thomas, president and cofounder of Acculon Vitality, a Columbus, Ohio-based startup advertising and marketing two battery modules with sodium-ion cells for industrial vitality and EVs that journey at low speeds, like golf carts. In contrast to Natron, Acculon, which launched in 2022, employs extra conventional layered-metal oxides and different sodium chemistries.
Thomas says it’s this distinction that makes it arduous to attract conclusions concerning the U.S. sodium-ion battery business as a complete in gentle of Natron’s closure. Evaluating totally different sodium-ion chemistries, like Prussian Blue or layered metallic oxides, is like evaluating apples to oranges.
“I don’t assume one failure is consultant of a rustic being unable, however we’re at a major drawback given the put in base in China,” Thomas says.
China is the dominant participant in sodium-ion battery improvement, with corporations like CATL displaying their designs at tech expos.Yuan Zheng/VCG/AP
China’s Dominance in Battery Manufacturing
China has lengthy dominated the battery business, and sodium-ion batteries are not any exception. Right now, China produces greater than 75 % of batteries bought globally, in response to the Worldwide Vitality Company. On the sodium-ion entrance, builders like CATL have moved into second-generation batteries, with the April launch of Naxtra, a model geared towards EV functions.
Yao says he’d wish to see the U.S. focus its focus extra on build up its manufacturing prowess to compete with China. “My broader critique of the Western Hemisphere by way of our considering and obsession with making an attempt to innovate ourselves out of the issue, is that we focus an excessive amount of on tech,” Yao says. “We’ve little or no manufacturing expertise… Our yield charges are abysmal, and our workforce just isn’t skilled.”
Founders like Evans and Thomas are optimistic about their prospects as rising demand for grid storage, knowledge facilities, and low-cost mobility functions drives the necessity for functions they are saying sodium-ion batteries are uniquely geared up to help by way of temperature vary, security, and value metrics. On the subject of manufacturing, Mana is taking a web page from China’s playbook by partnering with current producers to scale up manufacturing.
Evans says there’s an urge for food for this type of partnership within the U.S. proper now. “I believe it’s a commercialization candy spot that’s particular to sodium.”
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