As a renewable energy source, the biggest drawback of solar and wind energy is unsustainability - not always sunny and windy days. In this regard, waves have an unparalleled advantage. Scientists at the Georgia Institute of Technology have developed a nano-friction generator that uses waves to generate electricity. The researchers said the generator is simple, cheap and easy to use, and can work continuously day and night.
Friction power generation effect is the phenomenon that two materials contact and separate charge. Wang Zhonglin, the Georgia Institute of Technology in charge of the research, has previously developed a solid-state friction generator that charges battery cells for cell phones. The new research is facing the problem is how to make friction power generation in the humid environment such as seawater?
The researchers found that the phenomenon of friction power generation is not limited to solid between, it also exists in the liquid environment. The only requirement is that the two species' specific electron energies are close enough. For water, all it needs is a suitable "partner." Through experimentation, they found a special plastic or could do the job.
As a prototype, the researchers made an insulated plastic container. This container has a lid and a bottom on which electrodes made of copper sheets are mounted. Their system has been successful because of the nano-scale, pyramid-shaped polydimethylsiloxane (PDMS) coated inside the lid. The container is filled with deionized water. As the lid descends, the miniature pyramids come into contact with water and a collection of polydimethylsiloxane atoms are ionized, creating a negative charge. At the same time, a positive charge is also generated on the surface of the water. When the polydimethylsiloxane layer leaves the water to deliver charge, a complete triboelectric process is completed.
The principle is to use the polydimethylsiloxane and water potential difference between. The reason for choosing polydimethylsiloxane is its excellent hydrophobicity reduces the attachment of water, the unique pyramid shape more easily let the water fall off.
When placed in seawater, the device periodically rises and falls with the waves. The electrodes are connected to the rectifier and capacitor, and the resulting DC power can turn on 60 LED lights. Researchers said the device has a wide range of applications because of its temperature sensitivity as a temperature sensor; attaching other sensors, it can also provide more imagination for the design of biomolecule sensors and chemical sensors space.
Chief editor punctuality
As the saying goes, money is thrown into the water, not even a ring. But if you invest in this wave generator, money can be thrown into the sea but also money. The use of tidal power, long ago realized. But the friction of water has not been heard. We all know that there is great resistance to the boat traveling in the water, mainly due to friction. Transforming this nasty property into positive energy relies on organic materials scientists who are flashing light on a water-related material. In the future, even if the ocean wave engine is not a source of money, we can look forward to the "water friction" power generation used in medical fields.
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