3D Printed Batteries (the size of a sand grain)

Medical implants could soon be powered by batteries the size of a grain of sand thanks to development by scientists at Harvard and the University of Illinois. The images show a battery being created using a custom-made 3D printer with special inks.

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The inks developed have particular electrochemical properties allowing them to harden as soon as they leave the printer. The 3D printed Li-Ion micro-batteries are similar in their life expectancy, energy density, and charge and discharge rates to normal batteries on the market.

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For a closer look, the team’s tiny invention is described in detail in their paper, found in Advanced Materials.

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