Inlyte Energy reels in $8M seed round to revive a 50-year-old battery technology

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It’s not every day that a 50-year-old technology that was long since passed over gets a new lease on life.

Sodium-metal-halide batteries were first patented in the mid-1970s. The design showed promise: It was energy dense and cheap to make. Mercedes-Benz took an interest, investing heavily in research and development. The automaker even tested them in a handful of compact sedans, running tens of thousands of miles per year. In the 1980s, they were the hot chemistry — literally, too, since the cells have to be kept well past the boiling point of water in order to work.

But while automakers were curious about electric vehicles at the time, they weren’t committed. Meanwhile, the lithium-ion battery caught the attention of the electronics industry, which put the fledgling chemistry through its paces to the point where automakers started seriously considering it for a fresh crop of EVs. By that point, sodium-metal-halide batteries were all but forgotten.

Then Antonio Baclig took an interest. A recent doctorate graduate from Stanford, he was looking to start a grid-scale storage company to augment the explosive growth that wind and solar power experienced over the past decade. Baclig was particularly interested in batteries that relied on sodium instead of lithium because sodium is far cheaper to come by. Soon, he zeroed in on sodium metal halide.

With some tweaks, Baclig realized he could make cells even cheaper than existing designs while still maintaining the basic chemistry’s longevity and energy density. In 2021, he was accepted to the Activate Fellowship, founded Inlyte Energy, and started digging deeper.

“Along the way, as I was really trying to understand what happened in the industry around sodium-metal-halide batteries — why has it not grown beyond a niche battery technology? — I got in touch and connected with these people in the U.K. called Beta Research, which had been involved from the beginning, from the early 1980s. They were the ones that really developed that technology, and I didn’t know they were still around.”

The company was in a tight spot financially, and Baclig and the group reached a deal where Inlyte would acquire the team and its facilities and equipment following successful fundraising.

Needless to say, that round was successful. Inlyte closed an $8 million seed round, TechCrunch+ has exclusively learned. The round was led by At One Ventures with participation by First Spark Ventures, Valo Ventures, TechEnergy Ventures, Climate Capital, Anglo American and others.

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