By making the basic building blocks of batteries out of ink, Harvard materials scientist Jennifer Lewis is laying the groundwork for lithium-ion batteries and other high-performing electronics that can be produced with 3-D printers. Although the technology is still at an early stage, the ability to print batteries and other electronics could make it possible to manufacture new kinds of devices. Think of self-powered bio-medical sensors, affixed to the skin, that would continuously transmit vital signs to a smartphone.
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