Scientists Make Battery from Normal Paper and Ink
Well, not just ink and paper. They used nanotubes as well. But still, its still a pretty amazing breakthrough. Treehugger says,
they simply coat the paper with the special ink, put it in an oven and out comes a highly conductive storage device. “The small diameter helps the nanomaterial ink stick strongly to the fibrous paper, making the battery and supercapacitor very durable. The paper supercapacitor may last through 40,000 charge-discharge cycles – at least an order of magnitude more than lithium batteries.”
Unlike the urban legend of an onion powering the iPod, this is for real. The batteries are actually pretty powerful:
Cui’s batteries aren’t wimpy, either–they have comparable storage capacity to lithium-ion batteries and could potentially last for 40,000 charge-discharge cycles. That’s more than the li-ion batteries used in hybrid electric vehicles. And since ink adheres strongly to paper, the batteries are ultra-durable. According to Cui, the paper batteries can be crumpled or even soaked in acid without affecting performance.
GreenBang gives another description:
Society really needs a low-cost, high-performance energy storage device, such as batteries and simple supercapacitors,” said Cui, who published a paper on his research this week in the Proceedings of the National Academy of Sciences.
Like batteries, capacitors hold an electric charge, but for a shorter period of time. However, capacitors can store and discharge electricity much more rapidly than a battery.
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