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'Smart' Cloth May Replace Batteries in Wearable Devices
Scientists have developed the first durable, flexible cloth that harnesses human motion to generate energy and could replace batteries in wearable devices. Wearable electronics are gaining traction among consumers, but these gadgets' versatility is still held back by the stiff, short-lived batteries that are required.
The 'smart' cloth can overcome these limitations as it can self-charge batteries or supercapacitors without an external power source and make new commercial and medical applications possible.
Images source: cdn.phys.org
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Sang-Woo Kim and colleagues from Sungkyunkwan University Advanced Institute of Nanotechnology (SAINT) in South Korea said that small, lightweight devices could play life-changing roles as robotic skin or in other biomedical applications.
But to maximise their utility, such electronics need an ultra-flexible, long-lasting energy source that is seamlessly incorporated into the device's design. For a possible solution, Kim's team turned to the emerging technology of "triboelectric nanogenerators," or TNGs, which harvest energy from everyday motion.
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The researchers created a novel TNG fabric out of a silvery textile coated with nanorods and a silicon-based organic material. When they stacked four pieces of the cloth together and pushed down on the material, it captured the energy generated from the pressure.
The material immediately pumped out that energy, which was used to power light-emitting diodes, a liquid crystal display and a vehicle's keyless entry remote. The cloth worked for more than 12,000 cycles. The study is published in the journal ACS Nano.
Source: PTI
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