02 Jul '12, 4pm

Spray-on batteries could turn your coffee cup into an energy collecting device

Engineers at Rice University have figured out how to make spray-on, rechargeable batteries that could transform any surface, anywhere, into a device for collecting and storing energy. Basically, the team broke down the elements of individual battery components and turned them into paints . Once they’d done that, they could turn any paintable surface into a working battery — including coffee mugs. The final paints were layered on to glass, stainless steel, glazed ceramic tiles and flexible polymer sheets — the resulting “batteries” worked just as well as the regular version. The team even picked out a choice ceramic mug, spray-painted the word “rice” in capital letters using a stencil, and demonstrated its efficiency as a battery. They also layered the batteries with solar cells, which meant that the cells could not only collect energy but store it. There’s still some work ...

Full article: http://grist.org/list/spray-on-batteries-could-turn-your-...

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