The biggest problem with flexible electronic products, such as flexible smartphones, electronic paper, and the like, is the lack of a flexible stretchable battery. Some research groups have developed flexible and stretchable batteries, but most of these batteries have low performance, and because of the use of printing or polymers to make battery cells, they cannot be manufactured on a large scale in commercial production.
Recently, the research team led by hanqing. and yuhongyu of Arizona State University merged traditional origami art with modern materials science and developed a flexible and deformable high-performance lithium-ion battery. The battery can be repeatedly stretched (over 1,300% stretch), bent and twisted while maintaining battery capacity and output power.
The most exciting thing is that all the processes use standard electrode materials (graphite as negative electrode, lithium cobalt oxide as positive electrode), standard current collector (aluminum and copper foil) and packaging technology (aluminum plastic film), which means this Technology is safe. Theoretically, it can be mass-produced and commercialized. This will help solve the problem of energy storage in flexible electronics. This research titled “Origami Lithium-ion Batteries†(lithium-ion batteries based on origami art) was published in Nature-Communications magazine and has applied for US national patents.
This lithium-ion battery uses the Miura-ori origami structure invented by Koryo Miura. The initial purpose of this origami structure was to build a space-saving folding solar panel in a spacecraft. The key to this is that the folds allow the battery to be stretched, twisted, bent, and ensure that no excessive stress is applied. To the interior.
This lithium-ion battery not only has superior flexibility and stretchability, but also has a very good electrochemical performance: a 1cm2 size origami battery, an area of ​​about 1-2 milliampere capacity, and the capacity can also be increased by More active materials to improve. Its power can also be comparable to traditional lithium-ion batteries. Even after more than 200 repeated foldings, the origami battery retains its performance.
Looking ahead, Arizona State University's origami battery can play an important role in the development of flexible and wearable electronic products. The current batteries are all rigid and bulky, both of which are not only unsightly and uncomfortable for wearable electronics. In the future, we will not have to put a very small button battery on the smart hand-side dial, but use a large-capacity flexible origami battery that can be integrated in the strap. If you want to use a foldable flexible electronic paper display, or a flexible smartphone, a flexible origami battery is essential. Professor Jiang Hanqing stated that they are interested in further pushing this technology into commercial applications.
It is worth pondering that art forms like origami, which may have existed for thousands of years, may be the key to the future of flexible electronic age.
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