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Energy from paper

30.10.2007

Scientists from the USA offer to print batteries on sheets of paper.

Scientists from the Rensselaer Polytechnic Institute (USA) have created a battery that looks like a piece of black paper. In essence, this is a sheet of paper, since its base is made of cellulose fibers. On this basis, approximately by the same method as during the operation of the printer, electrodes were deposited - layers of carbon nanotubes. And the paper itself was moistened with an electrolyte, the so-called ionic liquid - molten salt. The ionic liquid does not contain a drop of water, it does not evaporate or freeze, so the battery can be used at temperatures from +150 to -70°C.

"This battery can be bent, folded, crushed, cut into pieces, and it will not lose its properties. Or you can put the sheets in a pile and get a very powerful battery. By the way, we made not only a battery, but also a capacitor capable of creating a high current density ", - says one of the participants in the work, Professor Robert Linhardt. - The components of the battery are connected to each other at the molecular level, this is a very smart paper. In addition, you can do without electrolyte at all - it will be replaced by blood, sweat or urine if such a battery becomes a power source for device implanted in the human body.

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