In the not-too-distant future, smart city sidewalks will also be able to generate electricity with the help of pedestrians who have passed in a hurry. Companies such as Pavegen have already provided some solutions, but for cost reasons, they are mostly used in shopping centers and football stadiums and other public places. However, a new technology developed by the University of Wisconsin-Madison is expected to make it into the homes of ordinary people, and prices will not be more expensive than traditional floors. Pavegen's floor tiles generate electricity through electromagnetic induction, and the school team chose the triboelectric effect.
The team called it "roadside energy collector."
Wang Xudong, a principal researcher from the University of Wisconsin-Madison, has a prototype of an energy collection floor. Charges can be generated by the friction of two material sandwiches, a discovery that has long been applied to clothing and touchscreen power capture.
We can imagine harvesting rich energy on the roadside and do a lot of work to collect energy from human activities. One direction is to create a device that is close to the body, and the other is to create something that is opposite to humans, such as the most commonly used floor.
Previously, Wang had experimented with a similar system that could collect the energy of car tire movements. In this case, he used a nanofiber embedded in a wooden floor less than 1 mm thick.
Some of the nanofibers are chemically treated and when they are in intimate contact with the untreated nanofibers (the rocking caused by treading on the surface of the material), they generate electrical charges that are then collected to supply lighting, battery charging and other family needs.
By stacking several layers more, the energy output of this system can also be doubled. Since nanofibers are relatively inexpensive and embedded in ordinary wood flooring, the team believes that the price of the finished product will be similar to that of ordinary wood flooring.
Compared to existing energy harvesting devices, this system is easier to recycle and expand, and it is as durable as standard wood flooring. In laboratory tests, it can experience millions of cycles without any problems.
Details of this research have been published in the recently published Nano Energy journal.
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