Technology.am (Aug. 6, 2009) — German scientists have invented the world’s first printable batteries, wafer-thin and environmentally friendly batteries which can be produced in bulk.
The new battery is different from conventional batteries. The printable version weighs less than one gram on the scales, is not even one millimetre thick and can therefore be integrated into bank cash cards, for example.
The new battery was developed by Dr Reinhard Baumann of the Fraunhofer Research Institution for Electronic Nano Systems ENAS in Chemnitz, Germany. Scientists aim to mass produce the batteries at a price of single digit cent range each.
The battery contains no mercury and is in this respect environmentally friendly. Its voltage is 1.5 V, which lies within the normal range. By placing several batteries in a row, voltages of 3 V, 4.5 V and 6 V can also be achieved.
The batteries are printed using a silk-screen printing method similar to that used for t-shirts and signs. A kind of rubber lip presses the printing paste through a screen onto the substrate.
Therefore, the battery is suitable for applications which have a limited life span or a limited power requirement, for instance greeting cards.