In binder jetting, a liquid agent is deposited onto a thin bed of powder particles currently, Sakuu says it can combine metal jetting and ceramic binder jetting in a single build. (Lithium-ion batteries, by contrast, use organic liquids as electrolytes, which heightens the risk of batteries catching on fire.) The company's 3D-printing platform is based on the binder jet printing process developed by MIT. Like many solid-state designs, Sakuu's battery cell involves a lithium-metal anode, as well as a ceramic electrolyte that separates the anode and cathode. "That's the kind of thing that printing really enables." "To get the highest energy density batteries, we want to minimize the volume of all the elements that are not adding anything to the performance of the battery," Karl Littau, chief technology officer of Sakku, told IEEE Spectrum. The technology allows the company to deposit multiple materials onto a thin, single layer. The small, 3 ampere-hour (Ah) cell - about the capacity of three AAA alkaline batteries - was produced alongside Sakuu's additive manufacturing platform. Recently, 3D-printing startup Sakuu (formerly KeraCel) developed a solid-state battery that it claims " equals or betters" the performance of current lithium-ion batteries. The next frontier, they say, is the solid-state battery - and perhaps 3D-printed ones, at that. Yet as electronics become increasingly sophisticated, and as more cars, buses, and trucks run on battery power, scientists are working to develop new chemistries that are lighter weight, more energy dense, and ideally safer than today's champion technology. Lithium-ion batteries are everywhere: in smartphones, laptops, electric vehicles, and even in your wristwatch.
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