Researchers at the University of Colorado Boulder have developed a new, low-cost wearable device that transforms the human body into a biological battery. The device, described in the journal Science Advances, is stretchy enough that you can wear it like a ring, a bracelet or any other accessory that touches your skin. It also taps into a person's natural heat—employing thermoelectric generators to convert the body's internal temperature into electricity.The devices can generate about 1 volt of energy for every square centimeter of skin space—less voltage per area than what most existing batteries provide but still enough to power electronics like watches or fitness trackers.
Scientists have previously experimented with similar thermoelectric wearable devices, but thiw one is stretchy, can heal itself when damaged and is fully recyclable—making it a cleaner alternative to traditional electronics. The latest innovation begins with a base made out of a stretchy material called polyimine. The scientists then stick a series of thin thermoelectric chips into that base, connecting them all with liquid metal wires. The final product looks like a cross between a plastic bracelet and a miniature computer motherboard or maybe a techy diamond ring. One can easily boost that power by adding in more blocks of generators. A person taking a brisk walk could use a device the size of a typical sports wristband to generate about 5 volts of electricity—which is more than what many watch batteries can muster.
If your device tears, for example, you can pinch together the broken ends, and they'll seal back up in just a few minutes. And when you're done with the device, you can dunk it into a special solution that will separate out the electronic components and dissolve the polyimine base—each and every one of those ingredients can then be reused. While there are still kinks to work out in the design, the group think that the devices could appear on the market in five to 10 years.
Vid: https://www.youtube.com/watch?v=hexScHvEFwQ
https://techxplore.com/news/2021-02-wearable-device-body-battery.html
Scientists have previously experimented with similar thermoelectric wearable devices, but thiw one is stretchy, can heal itself when damaged and is fully recyclable—making it a cleaner alternative to traditional electronics. The latest innovation begins with a base made out of a stretchy material called polyimine. The scientists then stick a series of thin thermoelectric chips into that base, connecting them all with liquid metal wires. The final product looks like a cross between a plastic bracelet and a miniature computer motherboard or maybe a techy diamond ring. One can easily boost that power by adding in more blocks of generators. A person taking a brisk walk could use a device the size of a typical sports wristband to generate about 5 volts of electricity—which is more than what many watch batteries can muster.
If your device tears, for example, you can pinch together the broken ends, and they'll seal back up in just a few minutes. And when you're done with the device, you can dunk it into a special solution that will separate out the electronic components and dissolve the polyimine base—each and every one of those ingredients can then be reused. While there are still kinks to work out in the design, the group think that the devices could appear on the market in five to 10 years.
Vid: https://www.youtube.com/watch?v=hexScHvEFwQ
https://techxplore.com/news/2021-02-wearable-device-body-battery.html
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