Phimega Group Post #41

Printable batteries
posted by soliton at Wed, 7 Oct 2009 - 09:12:23

For a long time, batteries were bulky and heavy. Now, a new
cutting-edge battery is revolutionizing the field. It is thinner than
a millimeter, lighter than a gram, and can be produced
cost-effectively through a printing process.

Link: Download picture

In the past, it was necessary to race to the bank for every money
transfer and every bank statement. Today, bank transactions can be
easily carried out at home. Now where is that piece of paper again
with the TAN numbers? In the future you can spare yourself the search
for the number. Simply touch your EC card and a small integrated
display shows the TAN number to be used. Just type in the number and
off you go. This is made possible by a printable battery that can be
produced cost-effectively on a large scale. It was developed by a
research team led by Prof. Dr. Reinhard Baumann of the Fraunhofer
Research Institution for Electronic Nano Systems ENAS in Chemnitz
together with colleagues from TU Chemnitz and Menippos GmbH. =93Our goal
is to be able to mass produce the batteries at a price of single digit
cent range each,=94 states Dr. Andreas Willert, group manager at ENAS.

The characteristics of the battery differ significantly from those of
conventional batteries. The printable version weighs less than one
gram on the scales, is not even one millimeter thick and can therefore
be integrated into bank cards, for example. 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 new type of battery is composed of different layers: a
zinc anode and a manganese cathode, among others. Zinc and manganese
react with one another and produce electricity. However, the anode and
the cathode layer dissipate gradually during this chemical process.
Therefore, the battery is suitable for applications which have a
limited life span or a limited power requirement, for instance
greeting cards.

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. A template covers
the areas that are not to be printed on. Through this process it is
possible to apply comparatively large quantities of printing paste,
and the individual layers are slightly thicker than a hair. The
researchers have
already produced the batteries on a laboratory scale. At the end of
this year, the first products could possibly be finished.

http://www.fraunhofer.de/en/press/research-news/2009/july/printable-batteri=
es.jsp


--=20
soliton
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