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|Jayan Thomas is a professor and scientist at the University of Central Florida.
Imagine being able to carry all the juice you needed to power your MP3 player, smartphone and electric car in the fabric of your jacket?
Sounds like science fiction, but it may become a reality thanks to breakthrough technology developed at a University of Central Florida research lab.
So far electrical cables are used only to transmit electricity. However, nanotechnology scientist and professor Jayan Thomas and his Ph.D. student Zenan Yu have developed a way to both transmit and store electricity in a single lightweight copper wire.
Their work is the focus of the cover story of the June 30 issue of the material science journal Advanced Materials and science magazine, Nature has published a detailed discussion about this technology in the current issue.
"It's a very interesting idea," Thomas said. "When we did it and started talking about it, everyone we talked to said, "Hmm, never thought of that. It's unique.'"
Copper wire is the starting point but eventually, Thomas said, as the technology improves, special fibers could also be developed with nanostructures to conduct and store energy.
More immediate applications could be seen in the design and development of electrical vehicles, space-launch vehicles and portable electronic devices. By being able to store and conduct energy on the same wire, heavy, space-consuming batteries could become a thing of the past. It is possible to further miniaturize the electronic devices or the space that has been previously used for batteries could be used for other purposes. In the case of launch vehicles, that could potentially lighten the load, making launches less costly, Thomas said.
So how did he get the idea about energy-storing cables? He was inspired during a routine evening walk in his neighborhood.
Thomas and his team began with a single copper wire. Then they grew a layer of nanowhiskers on the outer surface of the copper wire. These whiskers were then treated with a special alloy, which created an electrode. Two electrodes are needed for the powerful energy storage. So they had to figure out a way to create a second electrode.
They did it- this by adding a very thin plastic sheet around the whiskers and wrapping it around using a metal sheath (the second electrode) after generating nanowhiskers on it (the second electrode and outer covering). The layers were then glued together with a special gel. Because, of the insulationthe nanowhisker layer is insulating, the inner copper wire retains its ability to channel electricity, the layers around the wire independently store powerful energy.
In other words, Thomas and his team created a supercapacitor on the outside of the copper wire. Supercapcitors store powerful energy, like that needed to start a vehicle or heavy-construction equipment.
Although more work needs to be done, Thomas said the technique should be transferable to other types of materials. That could lead to specially treated clothing fibers being able to hold enough power for big tasks. For example, if flexible solar cells and these fibers were used in tandem to make a jacket, it could be used independently to power electronic gadgets and other devices.
"It's very exciting," Thomas said. "We take it step by step. I love getting to the lab everyday, and seeing what we can come up with next. Sometimes things don't work out, but even those failures teach us a lot of things. Still, I know how important getting out of the lab can be too. I won't be giving up those evening walks anytime soon. I get some great ideas during that quiet time."
Yu is the co-author of the study. He works in Thomas' Nano Energy-Photonics Group. It conducts research focused primarily on nanostructured supercapacitors and Lithiuim-ion batteries, nanoarchitectured light-trapping solar cells, photorefractive polymers for 3D display applications, and nonlinear optical materials.
Thomas is a faculty member at the UCF Nanoscience Technology Center with joint appointments in the College of Optics and Photonics (CREOL) and the College of Engineering and Computer Science. He has multiple degrees including a master's degree in chemistry and a Ph.D. in material science. He is a recipient of National Science Foundation's prestigious CAREER award. He's received media attention over the past few years for his work on lasers and advanced nanomaterials.
About University of Central Florida
America's Partnership University: The University of Central Florida, the nation's second-largest university with nearly 60,000 students, has grown in size, quality, diversity and reputation in its first 50 years. Today, the university offers more than 200 degree programs at its main campus in Orlando and more than a dozen other locations. UCF is an economic engine attracting and supporting industries vital to the region's future while providing students with real-world experiences that help them succeed after graduation. For more information, visit today.ucf.edu.
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Zenaida Gonzalez Kotala
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