Wearable solar self-powered system
With the rapid development of the Internet of Things and flexible electronic technology, wearable self-powered systems have received more and more attention. However, the performance of each module of energy conversion, energy collection and energy storage is difficult to match, which often results in the self-powered system being redundant and bulky.
Recently, Sun Jingyu, Shao Yuanlong, professor of the School of Energy, Suzhou University, and Richard B. Kaner, a professor at the University of California, Los Angeles, etc., built high-integrity, wearable solar direct charging self-powered units with the help of printing technology. The trouble of "brick" charging treasure is easy to carry and carry.
Their research results published in "Nature-Communication" show that the design of this solar charging device includes an energy harvesting module (ie flexible solar cell), an energy storage module (ie printing quasi-solid non-solid printing on a polyimide substrate Symmetric supercapacitor array) and a plastic film overlay. Among them, the quasi-solid asymmetric supercapacitor is assembled with vanadium nitride as the negative electrode, manganese oxide as the positive electrode, and polyacrylamide gel as the electrolyte.
This wearable solar self-powered system also uses screen printing technology to build a miniature magnesium ion-based asymmetric supercapacitor, which is integrated with commercial solar cells to form high flexibility, high integration, high safety, and high cycle stability The wearable solar self-powered unit provides a new solution for building integrated, wearable self-powered devices.
The researchers said that when exposed to sunlight, solar cell modules convert heat radiation into electrical energy and charge the supercapacitor at the same time. The charged photoelectric supercapacitor can provide storage power for electronic devices at any time. This self-powered solar charging unit can be worn directly, and can be used as a reliable power supply for portable electronic watches. (Li Muzi)
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