World's tiniest battery could power computers the size of a dust speck

Researchers have developed the world's smallest battery, one square millimeter in size, to power the world's smallest computers.

Published Wed, Feb 23 2022 5:21 AM CST   |   Updated Mon, Mar 21 2022 12:03 AM CDT

A study on the battery titled "On-Chip Batteries for Dust-Sized Computers" has been published in the journal Advanced Energy Materials.

World's tiniest battery could power computers the size of a dust speck 01 |

Researchers from the Chemnitz University of Technology have developed the world's smallest battery, inspired by the Swiss roll dessert. They layered current collectors and electrode strips onto a tensioned water surface, which could then self-assemble through a "micro-origami" process into what they describe as a "self-wound cylinder micro-battery."

The battery is one square millimeter in size, roughly the size of a speck of dust. With a minimum energy density of 100 microwatt hours per square centimeter, the researchers say the battery could be used to power tiny computer chips used in biosensors in the human body. They claim their battery could power the world's smallest computer chips for around ten hours, expanding the applications of biosensors that typically rely on harvesting energy through other means.

"Our results show encouraging energy storage performance at the sub-square-millimeter scale", said Dr. Minshen Zhu,

"There is still a huge optimization potential for this technology, and we can expect much stronger micro-batteries in the future," explained Professor Oliver Schmidt.

You can read more from the study here.

Adam grew up watching his dad play Turok 2 and Age of Empires on a PC in his computer room, and learned a love for video games through him. Adam was always working with computers, which helped build his natural affinity for working with them, leading to him building his own at 14, after taking apart and tinkering with other old computers and tech lying around. Adam has always been very interested in STEM subjects, and is always trying to learn more about the world and the way it works.

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