World’s smallest battery could power computers the size of a speck of dust

A battery study titled “On-chip batteries for dusty computers” was published in the journal Advanced Energy Materials.

Researchers at the Chemnitz University of Technology have developed the world’s smallest battery, inspired by the Swiss rolled dessert. They superimposed current collectors and strips of electrodes on a stretched water surface, which could then self-assemble through a “micro-origami” process into what they describe as a “micro- self-winding cylindrical battery”.

The battery measures one square millimeter, 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 say their battery could power the world’s smallest computer chips for about ten hours, expanding the applications of biosensors that typically rely on harvesting energy by other means.

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

There is still huge optimization potential for this technology, and we can expect much more powerful micro batteries in the future.“, explained Professor Oliver Schmidt.

You can read more of the study here.