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Posted by on Jun 19, 2013 in Hardware News |

They manage to make tiny battery for 3D micro printing

They manage to make tiny battery for 3D micro printing

In recent years, engineers have invented many miniaturized devices such as medical implants, insect-like flying robots and cameras and microphones that fit into a pair of glasses. A recent example is Robobee, the robot weight 80mg fly , the prototype had to be fed by a thin wire because it was available micro-battery.

In these minidispositivos, often the to power them are so large, or larger than the device itself, which defeats the purpose of them small.

To solve this problem, manufacturers have traditionally deposited thin films of solid materials to build the electrodes. However, due to its ultra-thin, these micro-batteries do not accumulate enough energy to feed the miniaturized devices.

A team of Harvard University and the University of Illinois at Urbana-Champaign, printed tiny electrodes in batteries accurately intertwined, each with a thickness less than that of a human hair.

The scientists realized that they could accumulate more energy if made ultra thin battery electrode and tightly intertwined. For this, they turned to printing. The 3D follow the instructions of 3D drawings from the computer, and successive layers deposited material-ink. (See video)

Have designed a range of functional inks with chemical and electrical properties useful. They have been used to create by 3D printing, precise structures with the electronic, optical, mechanical or biological desired.

They manage to make tiny battery for 3D micro printing image 2

In the picture above we see that for the micro-battery, the 3D printer special inks extruded through a nozzle narrower than a human hair. Solidify inks to create the battery (red) and (in purple), layer by layer. A chassis (green) encloses the electrodes and the electrolyte solution to create the micro-battery.

In the video below, the 3D printer nozzle (narrower than a human hair) a layer of “ink” specially formulated to create a micro-battery anode for.

Unlike ink jet printer stream, which comes in the form of drops of liquid and wet the paper, these “inks” are specially formulated to leave the nozzle as a toothpaste and then harden immediately layers as narrow as those produced by the methods of thin film fabrication. Also, inks containing nanoparticles of a compound of lithium oxide, which gives the suitable anode electrical properties.

Link: 3D printing tiny batteries (phys.org)

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