A group of researchers from the Ulsan National Institute of Science and Technology (UNIST), South Korea, have designed a really tiny and ultra-dense Micro-supercapacitor that can be printed directly into circuits.
Microsupercapacitors (MSCs) have garnered considerable attention as a promising power source for microelectronics and miniaturized portable/wearable devices. However, their practical application has been hindered by the manufacturing complexity and dimensional limits.
the team explains in the abstract of the paper.
The Micro-supercapacitor, as tiny as it is (roughly the width of a human fingerprint), is being positioned as the next big thing in the world of IoT — it could power both future wearables and embedded IoT devices.
The team from the School of Energy and Chemical Engineering was able to conduct a study, the first of its kind that exploits electrohydrodynamic jet printing in the micro-supercapacitors. They fabricated a new class of ultra-high areal number density solid-state MSCs directly on a chip via EHD jet printing. EHD jet printing is a high-resolution patterning technique that uses the electrode and electrolyte for printing purposes. It is similar to conventional inkjet printing but it can control printed liquid with an electric field.
And the results?
We were able to produce up to 54.9 unit cells per square centimeter (cm2) via electro-hydrodynamic jet printing technique, and thus the output of 65.9 volts (V) was achieved in the same area,” the first author of the project, Kwonhyung Lee, explains.