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A wearable wristband containing a thermoelectric generator (TEG) can convert body heat into enough electricity to power an LED. In future, the technology may be able to power smartwatches and end the need for traditional charging hardware.
“Energy supply is always a big issue, and this could help alleviate the energy crisis,” says Qian Zhang of the Harbin Institute of Technology, China, one of the co-authors of the paper, who has worked on TEGs for more than 15 years.
TEGs are used in a wide range of applications, but are often rigid – something Zhang and her colleagues sought to solve. They layered a magnesium and bismuth material – the TEG materials – between polyurethane and a flexible electrode, enabling the wristband to wrap around a human arm. ....

Qian Zhang , Zuid Holland , Alena Butusava Getty , Chris Stokel Walker , Harbin Institute Of Technology , Delft University Of Technology , Harbin Institute , Rolf Hut , Delft University , Cell Reports Physical Science , ஹார்பின் நிறுவனம் ஆஃப் தொழில்நுட்பம் , டெல்ஃப்ட் பல்கலைக்கழகம் ஆஃப் தொழில்நுட்பம் , ஹார்பின் நிறுவனம் , ரோல்ஃப் குடிசை , டெல்ஃப்ட் பல்கலைக்கழகம் , செல் அறிக்கைகள் உடல் அறிவியல் ,