This is the smallest battery in the world

The evolution of biosensors, as well as the continuous development of IoT devices, have led researchers to seek new technologies regarding batteries, as they want to offer as much autonomy as possible without affecting the size of the devices or the placement of other components in the their interior.

With this in mind, researchers at the Chemnitz University of Technology, IFD Dresden and the Changchun Institute of Applied Chemistry, have created the world's smallest battery less than a grain of dust! Their work was done in order to serve small devices that could be used as implants in the human body and possibly other types of very low energy devices that are not easy to recharge.

Their battery development was based on two principles of microcomputers. To offer a minimum energy density of 100mW / cm² and to be able to integrate it into other electrical circuits of the chipset. In terms of design, the battery consists of a thin film that is wrapped in layers like a roller, thus offering a sufficient amount of energy without taking up much space.

So far they do not mention any possible application, apart from the theoretical hypothesis that it could be placed e.g. in implants. It will be interesting, however, to see if this technique could be applied to more batteries that power larger devices (eg smartphones).