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  • We already wear technology, from Apple watches to devices that monitor our vitals for medical

  • reasons.

  • There are even researchers in Sweden developing an in-body intranet that can link all wearable

  • medical devices!

  • As more and more things become integrated into our bodies, batteries will have to follow.

  • Right now, batteries are rigid, meaning whatever you put them in -- like a cell phone -- has

  • to be rigid.

  • Then there's that pesky issue where lithium-ion batteries in cellphones have a tendency to

  • explode when bent or punctured.

  • We're going to need a different power solution before we can better integrate personal devices

  • around our flexible bodies, and we're already seeing some early flexible battery technologies

  • in the making.

  • One recent development isn't the battery elements but a binding agent for the elements.

  • But let's back up for just a second.

  • All batteries are like little columns or bricks.

  • The internal elements are: the negatively charged anode, the positively charged cathode,

  • and some kind of the electrolyte that separates them.

  • Once the circuit is closedsay when a battery is put in a flashlightelectrons

  • can travel from the anode to the cathode, powering the light bulb along the way.

  • So back to this new thing

  • A team of researchers have created a new kind of glue that can bind battery elements together

  • with hydrogels.

  • Hydrogels are water-based materials that aren't dissimilar to the tissues that make up human

  • muscles and flesh.

  • The battery isn't stretchy, but the casing is!

  • The new glue is made of super glue's main ingredientcyanoacrylatemixed with

  • an organic non-solvent that delays the fluid's hardening.

  • This allows the adhesive to permeate porous materials before it sets, creating an instantaneous

  • and strong bond.

  • It's an adhesive that can hold 2.2 pounds (1 kilogram) and stretch as much as 2,000

  • percent.

  • The glue tech is well suited to stretchable batteries, electronic skin, and even hydrogel-based

  • patches loaded with sensors.

  • But it's not just this new glue that's getting us closer to stretchy electronics!

  • A different team from the University of California Berkeley developed a battery that can stretch

  • and bend.

  • They took the elements of a battery and arranged them end to end along a helical spring or

  • flexible wirebasically a tiny slinky that experiences minimal stresses when it's bent.

  • This is an ideal form for a bracelet, making these stretchy batteries a great option for

  • wearables that need to be in contact with the skin.

  • Another design sees a wire snaking along in a flexible polymer such that when it's flexed

  • the wire stretches without decreasing the battery's chemical power.

  • These batteries can be charged like any other battery, but the Berkeley team is looking

  • ahead at incorporating tiny solar cells, because the more devices we have the less practical

  • it will become to plug each one into the wall to recharge.

  • So, we have a stretchy case and we have stretchy battery elements, but this is all still in

  • the lab.

  • Stretchy batteries are years away, but, like, 5 years away, not decades!

  • Just think, someday stretchy batteries could let us bend a cell phone around our wrists

  • before we work outor maybe bring back slap bracelets -- but way more technologically

  • awesome ones.

  • If you're worried about plugging all these things in though -- maybe don't?

  • Wireless charging might be on the way thanks to this new design.

  • Check it out here.

  • Let us know what tech you're excited to have stretchy batteries for in the comments,

  • give this video a like, and subscribe for more Seeker.

We already wear technology, from Apple watches to devices that monitor our vitals for medical

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Stretchy Batteries Are Coming... Here's How They Work

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    joey joey に公開 2021 年 04 月 12 日
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