Sakuu's Dry-Printed Battery Cell Uses Carbon Fiber Veil to Replace Metal Foil Current Collectors

Sakuu has produced a 0.5 Ah lithium-ion test cell using a fully dry-printed electrode process and a carbon fiber veil in place of metal foil current collectors. The company says the fibers prevent wrinkling in the polymer current collector and help keep layers in contact, reducing resistance and adding structural strength. Sakuu sees this as a step toward structurally integrated batteries for vehicles, wearables, and data centers. The dry process matters because conventional wet electrode manufacturing uses solvents and extra drying energy. Sakuu also says its series-connected PCC design dissipates energy slowly on damage instead of causing thermal runaway, though that claim needs validation at larger cell sizes. The company is targeting supercapacitor electrodes for AI data center power needs as well. For carbon and energy storage readers, this is early-stage but relevant. The carbon fiber veil replaces metal, and dry printing could lower manufacturing emissions if it scales. The 0.5 Ah cell is proof of concept, so watch for cycle life and production cost data before drawing firm conclusions.