New Device Generates Electricity From Thin Air - Slashdot
source link: https://science.slashdot.org/story/23/06/01/2235200/new-device-generates-electricity-from-thin-air
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New Device Generates Electricity From Thin Air
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As water molecules pass through the device, from an upper chamber to a lower chamber, they knock against the tiny holes' edges, creating an electric charge imbalance between the layered chambers. In effect, it makes the device run like a battery. The whole process resembles the way clouds make electricity, which we see in the form of lightning bolts, according to Inverse's Molly Glick. [...] Currently, the fingernail-sized device can only create continuous electricity equivalent to a fraction of a volt, writes Vice's Becky Ferreira. But the researchers hope it can someday become a practical, sustainable source of power.
Scientists have previously tried harnessing humidity to generate electricity, but their attempts have often only worked for a short amount of time or relied on expensive materials, per Vice. In 2020, Yao and other researchers found a way to continuously collect electricity from humidity using a material grown from bacteria. But now, the new paper shows that such a specific material isn't necessary -- just about any material works, such as wood or silicon, as long as it can be punctured with the ultra-small holes. This finding makes the device much more practical; it "turns an initially narrow window to a wide-open door for broad potential," Yao tells Vice.
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