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ENERGY TECH
Generating electricity from tacky tape
by Staff Writers
Washington DC (SPX) Nov 23, 2022

This adhesive tape-based nanogenerator can light several hundred LEDs.

Along with bitterly cold temperatures, winter usually brings dry air and the occasional zap of static electricity. Those shocks might be annoying, but researchers are working to harness that otherwise wasted energy with triboelectric nanogenerators (TENGs) to power everyday devices.

Now, in ACS Omega, a team describes an easy way to manufacture these tiny generators out of materials as simple as double-sided store-bought tape that pack in higher energy densities than previously reported versions.

TENGs can transform mechanical energy into electrical energy through the triboelectric effect, which is a form of static electricity. But instead of that static turning into a shock, these nanogenerators send it through a circuit to power a device, such as an LED.

Though based on simple principles, many TENG devices are complicated and expensive to make and only produce a few watts of power. Previous research has shown that simplified TENGs can be made with a combination of tape, plastic and metal, but their low power densities have prevented them from being used in practical applications. So, Gang Wang and colleagues wanted to design an uncomplicated, easy-to-fabricate TENG that would work as well as more sophisticated designs.

The researchers created a TENG with layers of store-bought double-sided tape and plastic film covered with a thin sheet of aluminum metal. When these two layers were pressed together then disconnected from one another, a small spark formed between them.

If more pressure was placed on the layers, they could generate more power. In fact, the TENG was able to produce power densities consistent with that of other, more complicated versions. A double-electrode version of the device could even produce a power density of 169.6 watts per square meter - 47% higher than that previously reported for other devices, the researchers say.

In a series of tests, the team put the TENG through its paces. When hooked up to an array of LEDs, the generator could light up over 400 lights simultaneously when someone pressed the layers. Attaching the TENG to the bottom of a shoe could turn on LEDs with the power of a simple step.

In addition, the generator could power a laser diode, which could pave the way for use in sensors and light-based electronics. The researchers say that this generator design could help meet the larger power demands for self-powering electronics with simpler and cheaper materials.

The authors acknowledge funding from the College of Engineering at the University of Alabama in Huntsville and Materials Sciences LLC.

Research Report:"Power Generation by a Double-Sided Tape"


Related Links
American Chemical Society
Powering The World in the 21st Century at Energy-Daily.com


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ENERGY TECH
Great potential for aquifer thermal energy storage systems
Karlsruhe, Germany (SPX) Nov 23, 2022
Aquifer thermal energy storage systems can largely contribute to climate-friendly heating and cooling of buildings: Heated water is stored in the underground and pumped up, if needed. Researchers of Karlsruhe Institute of Technology (KIT) have now found that low-temperature aquifer thermal energy storage is of great potential in Germany. This potential is expected to grow in future due to climate change. The study includes the so far most detailed map of potential aquifer storage systems in German ... read more

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