Guide: a weight less than the flies of the yarn, each time being stretched, you can light a LED.
Simply put, you take a yarn, stretch it, it will produce electricity. Put them in the shirt, no external power supply, people can breathe normal can produce electricity. "Said Dr. Carter Haynes, MD, of the University of Texas at Dallas at the University of Texas at the University of Texas at the University of Texas at the University of Texas.
The yarn, called Twistron, is spun from many carbon nanotubes, and the diameter of a single carbon nanotube is ten thousand times smaller than the diameter of a human hair. In order to make the yarn with high elasticity, the researchers continue to improve the twist, so that the formation of a similar spring structure.
"These yarns are essentially supercapacitors, but it does not require an external power supply to charge," said Dr. Li Na, a nanoscale research institute. Because carbon nanotubes are different from the chemical potential of the electrolyte, when the yarn is immersed in the electrolyte, a portion of the charge is embedded. When the yarn is stretched, the volume is reduced, so that the charges are close to each other, and the voltage generated by the charge is increased to obtain electric energy.
"When the yarn is stretched at a frequency of 30 times per second, the yarn can produce a peak electric power of 250 watts per kilogram, and a yarn that is less than the weight of the flies can be lit every time it is stretched. Dr. Twain Bowman, one of the authors of the article, says that the electric power per unit weight of Twistron yarns can be increased by more than a hundred times compared to other fabricable fibers.
It is worth mentioning that salt water can also be used as an electrolyte. The output of the generator yarn can be scaled up as the yarn volume increases and the number of yarns in parallel increases. "If you reduce production costs, Twistron can eventually be used for surfing," said Bowman.
At present, the most suitable application for carbon nanotube yarns is to supply power for sensors or Internet traffic. "Based on the average output power we achieve, we only need 31 milligrams of yarn, we can transmit 2 kilobytes of data packets every 10 seconds in a radius of 100 meters."