Images of different types of carbon nanotubes. Carbon nanotubes are key to MIT researchers' efforts to improve on an energy storage device called an ultracapacitor. Image / Michael Str̦ck, released under GNU Free Documentation License. Original image courtesy Wikipedia

Just about everything that runs on batteries—flashlights, cell phones, electric cars, missile-guidance systems—would be improved with a better energy supply. But traditional batteries haven’t progressed far beyond the basic design developed by Alessandro Volta in the 19th century. Until now. « more »

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