BendableBattery
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LG Chem develops very flexible cable batteries, may leave mobile devices tied up in knots
The world is no stranger to flexible batteries, but they've almost always had to be made in thin sheets -- that doesn't amount to a long running time if you're powering anything more than a watch. LG Chem has developed a flexible lithium-ion battery that's not just better-suited to our bigger gadgets but could out-do previous bendable energy packs. Researchers found that coating copper wires with nickel-tin and coiling them briefly around a rod results in a hollow anode that behaves like a very strong spring; mating that anode with a lithium-ion cell leads to a battery that works even when it's twisted up in knots. Join multiple packs together, and devices could have lithium-ion batteries that fit many shapes without compromising on their maximum deliverable power. Some hurdles remain to creating a production-grade battery, such as a tendency for the pack to shed a small amount of capacity whenever it's put under enough stress. LG Chem is fully set on turning these cable batteries into shippable technology, however, and could ultimately produce mobile devices and wearables that really do bend to their owners' every whim.
Flexible batteries get the graphene treatment, could be cheaper than other bendy batts
We've been talking about flexible batteries for years now, but a team of Korean researchers have presented a new solution to bendable energy sources that is not only more powerful than standard lithium-ion batteries, but also potentially cheaper to produce than its malleable predecessors -- and unsurprisingly, everyone's favorite wonder material, graphene, is at the heart of the innovation. The rechargeable battery contains a vanadium-oxide cathode, grown on a sheet of graphene paper, an unidentified separator, and an anode made of lithium-coated graphene. According to the folks behind the new power source, it sports higher energy and power density, as well as a better cycle life than the literally stiff competition. Similar advances have also out-performed rigid lithium-ion batteries, but have enlisted carbon nanotubes, a material more expensive to produce than graphene. Of course, like all technological advances, we won't be seeing these things for years, if not decades, so you might as well get used to ye olde standard bearer.
Inhabitat's Week in Green: fly like a bird, bend batteries in half, and spray clothing from a can
Each week our friends at Inhabitat recap the week's most interesting green developments and clean tech news for us -- it's the Week in Green. This week saw several amazing feats of aeronautics as we showcased the world's first continuous flight of a human-powered ornithopter and the sun-powered Solar Impulse plane embarked upon an incredible voyage across Switzerland. We also watched transportation take off as BMW unveiled a zippy new electric scooter, Sanitov launched a GPS enabled cargo tricycle in London, and this week's Green Overdrive show took us off-roading on a souped-up e-bike! Renewable energy tech also energized the globe as several countries in Central America launched plans to tap volcanoes for power and China developed the world's first directly solar-powered air conditioning unit. Energy storage also got a big boost as Stanford researchers unveiled a new type of bendable battery made out of paper - just the thing to power the flexible e-readers of the future. In other news, this week we brought you exclusive coverage of the greatest green designs from this year's London Design Festival and we showcased the latest in wearable tech - instant spray-on clothing in a can! Finally, we tackled an issue that has plagued tech junkies forever - those impossible-to-open clamshell plastic packages.
Researchers develop bendable, paper-based battery
Nah, the researchers at Rensselaer Polytechnic Institute won't be crowned the first to develop a flexible (or paper-based, for that matter) battery, but their minuscule prototype "is an integrated device, not a combination of pieces" as others typically are. The battery uses "paper infused with an electrolyte and carbon nanotubes that are embedded in the paper," and could eventually be utilized in combination with solar cells or "scaled up and shaped into something like a car door, offering moving electrical storage and power when needed." Currently, however, the wee samples can release just "2.3-volts, or enough to illuminate a small light," but the idea of using these things to power pacemakers and the like isn't that far fetched.[Via BBC, thanks to everyone who sent this in]
