Lithium-ion battery the size of a grain of sand – the future of nanoelectronics

Jul

4

2013

Lithium-ion battery the size of a grain of sand – the future of nanoelectronics

sand grain microbatteries

Over the past few years, the trend of miniaturization of electronic devices. A striking example of this is a lot of biological sensors . However, at the moment there is a big enough problem – the power subsystem. Despite the many developments , the evolution of the market of batteries did not happen for a long time. Batteries are still big and heavy, not to mention their lack of capacity. A group of scientists from Harvard University and the University of Illinois is being able to solve one of the problems: they have created the world’s smallest lithium-ion rechargeable battery the size of a grain of sand.

Such small size, it has been achieved through the use of three-dimensional nanoimprint technology. The anodes and cathodes are made of two types of special electrochemically active ink nanoprintera extruded through a nozzle having a diameter less than the diameter of a human hair. Ink used to create anodes contain nanoparticles of lithium metal oxide, while the nanoparticles of the compound present in the ink used for the manufacture of cathodes.

sandgrainmicrobatteries-0

Both components were created by applying successive layers of ink bystrozatverdevayuschih. As a result of the anodes and cathodes without contact are located facing each other (as the two comb teeth). This structure was enclosed in a protective capsule of a polymeric material, the inner cavity is filled with a liquid electrolyte solution.

After a series of tests, scientists have found capacity, while a full charge-discharge and other characteristics nanoakkumulyatora. The researchers said that “the electrochemical characteristics of these batteries are comparable to the properties of the images of commercial lithium-ion batteries in terms of the time of the charge-discharge cycle life and the amount of stored energy.”

Previously, the power of miniature electronic devices used in thin-film batteries. According to Professor Jennifer Lewis of Harvard University, established by them with the help of technology 3D-printing thin-film batteries outperform counterparts on several parameters.
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