AMS Spring 2023

First Lithium Solid State Battery Produced by 3D Printing Startup Sakuu

6K SmarTech

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Bay Area startup Sakuu Corporation has reached the first step in fulfilling its promise to 3D printing solid-state batteries (SSBs). The company has announced that it has produced a 3Ah lithium SSB that “equals or betters current lithium-ion batteries”.

Sakuu has developed a unique multi-material binder jetting process that can combine such materials as ceramics and metals for a variety of applications. The first demonstrator application will be the production of lithium SSBs, which the startup suggests can be manufactured at scale using its multi-material multi-method (4M) technology.

The first-generation batteries unveiled by the company are made up of 30 cells, which combines lithium with a proprietary ceramic separator. The startup says that it uses standard cathode materials, but could feature even higher voltage cathodes in the future with the potential for 25 percent more energy.

In our recent interview with the firm, we were told that “the platform will be able to print solid state batteries. We, we have been able to print batteries in the past. We’re not advertising the fact that we’re in the market to print batteries at the moment. We’re focused on finishing the platform that can do it. We are working in parallel with all of the battery chemistry and everything else.”

In those case, the first generation SSB battery was not 3D printed using its 4M platform. In the company’s press release, it notes, “Sakuú has been developing its first generation SSB battery technology alongside its flagship additive manufacturing platform, set for commercial launch by the end of this year.”

Sakuu’s first generation solid-state battery. Sakuu’s first generation solid-state battery. Image courtesy of Sakuu.

Nevertheless, the release of a battery is evidence that Sakuu is on its way to achieving its promises. It will be delivering batteries to “strategic” partners in late Q3 2021 and “early access” partners in Q4. Volume production is targeted for early 2022, as Sakuu CEO and Founder Robert Bagheri said:

“We developed this first generation of SSB’s to prove the viability of our battery technology in anticipation of the Sakuú 1000 advanced AM platform. Over the last year, we have improved our battery energy capacity by a factor of 100 and our volumetric energy efficiency over 12 times and are planning to begin volume production of the batteries in early 2022 to meet the needs of our strategic partners.”

3D printed SSBs could have strong potential for a variety of sectors, due to the ability to feature greater energy density in smaller spaces with unique geometries. One could imagine batteries integrated directly into the products they serve, particularly once Sakuu introduces polymer 3D printing to its platform.

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