Pentagon Offers Battery Startup 6K $250M Loan for Tennessee Plant

The Department of Defense has conditionally approved a $250 million loan for 6K, a 12-year-old battery materials startup based in North Andover, Massachusetts, to build a manufacturing plant in Tennessee, according to TechCrunch. The announcement came Thursday and ties the loan to the Pentagon's interest in building domestic battery supply chains that do not depend on Chinese suppliers.

What did the Pentagon approve for 6K?

The DoD's conditional approval covers $250 million in loan financing earmarked for a Tennessee factory, TechCrunch reports. "Conditional" means the funding is not finalized; 6K still has to meet terms set by the department before the loan closes and money moves. The outlet did not report a closing date or a list of the specific conditions attached to the offer.

The plant is meant to scale up 6K's manufacturing process for cathode material, a core component in batteries, at a facility located in Tennessee rather than at the company's Massachusetts headquarters.

How does 6K's microwave-plasma process work?

6K's process heats metals into a plasma state using microwaves, then deposits the resulting material onto a surface, according to TechCrunch. The company says this approach reduces the number of steps needed to produce cathode material compared with conventional methods.

TechCrunch reports the process is not limited to one chemistry. 6K says it can work across multiple battery types, including lithium iron phosphate, or LFP, a chemistry widely used in electric vehicles and grid storage because it avoids cobalt and nickel.

Why did 6K need to reapply for funding?

This is not 6K's first attempt at federal backing. The company previously won a $50 million grant from the Department of Energy in 2023, awarded under the Bipartisan Infrastructure Law, per TechCrunch. That grant was later canceled by the Trump administration as part of a broader cancellation of Biden-era manufacturing awards, forcing 6K to reapply for support.

The Tennessee factory was originally expected to open in 2024. TechCrunch reports that the grant cancellation, combined with uncertainty in the electric vehicle market, pushed 6K to rework its plans before landing the new DoD loan offer.

Why is the Pentagon funding battery manufacturing?

TechCrunch frames the loan as part of the Pentagon's broader push to build domestic battery material capacity, noting that batteries show up across military equipment as well as commercial products. The outlet's framing ties the 6K offer to the department's stated goal of reducing reliance on Chinese suppliers for materials used in both defense hardware and civilian battery packs.

The report does not detail how the loan would be structured, repaid, or whether it carries interest terms typical of federal manufacturing loans. Those specifics were not part of the source material reviewed for this story.

What happens to the Tennessee factory next?

Because the approval is conditional, the next steps are procedural rather than final. 6K has to satisfy whatever terms the DoD attached to the offer before the loan is finalized and construction funding is released. TechCrunch's report does not specify a timeline for when that process might conclude or when groundbreaking in Tennessee might occur.

What to watch

• Whether the DoD loan converts from "conditional" to a finalized, signed agreement, and on what terms.
• Whether 6K sets a new target date for the Tennessee plant after the 2024 opening slipped.
• Whether the plant's output focuses on LFP cathode material or spans multiple battery chemistries, as the company has claimed its process can support.
• Whether other canceled Biden-era battery grants get revisited through defense-linked financing rather than DOE grants, following the same reapplication path 6K took.

Why does this matter beyond one factory?

The 6K case illustrates a pattern TechCrunch has tracked in its Climate coverage: battery material startups whose Energy Department grants were canceled are turning to the Pentagon for financing instead. For 6K, that meant losing a $50 million DOE grant tied to the Bipartisan Infrastructure Law and, roughly three years later, winning a $250 million conditional loan offer from the Department of Defense for the same underlying goal — a US factory producing battery cathode material without Chinese sourcing. The company's own claim, that its microwave-plasma process can work across LFP and other chemistries, remains unverified by independent testing data in the available reporting.

For now, the loan is an offer, not a signed contract, and the Tennessee plant has no confirmed opening date.

Artiglio is A coming-soon iPhone chief of staff for briefings and drafts. Not on the App Store yet.