Simply coating a sheet of paper with ink made of carbon nanotubes and silver nanowires makes a highly conductive storage device. These nanomaterials are special. They’re a one-dimensional structure with very small diameters. The small diameter helps the nanomaterial ink stick strongly to the fibrous paper, making the battery and supercapacitor very durable. The paper supercapacitor may last through 40,000 charge-discharge cycles – at least an order of magnitude more than lithium batteries. The nanomaterials also make ideal conductors because they move electricity along much more efficiently than ordinary conductors.
In this article, you can watch video when Yi Cui, assistant professor of materials science and engineering demonstrated how to make the device. This article also said that the flexibility of paper allows for many clever applications. A paper supercapacitor may be especially useful for applications like electric or hybrid cars, which depend on the quick transfer of electricity. This technology also has potential to be commercialized within a short time. This is potentially a very nice, low-cost, flexible electrode for any electrical device. And the most important part of this paper is how a simple thing in daily life – paper – can be used as a substrate to make functional conductive electrodes by a simple process.
Detail story about this smple and usefull device can be read here
Provided by Stanford University (web)