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Mini-batteries for mobile phones
May 19, 2004CIDETEC is working on a project the aim of which is to carry out a direct assessment of the technology of fuel cells for "mini" applications which have between 1 and 10 watt power requirements - such as for mobile phone or PDA chargers or for remote signalling, etc. to this end, a series of technologies are being developed in order to obtain a house technology mini fuel cells, including the design and enhancement of EMAs (electrode-membrane assemblies), of structural elements (current collectors, shutting-off devices) and of the electronics for current enhancement (including the use of supercondensers for the supply of current peaks).
This work is currently following two lines of investigation, depending on which fuel is used. The first, using hydrogen mini fuel cells (stored in a small metal hydride cartridge), while the current focus is on the use of direct methanol (DMFC). To date it has been possible to assemble and test a 1.5W hydrogen mini fuel cell prototype which, combined with supercondensers, has been able to power a mobile phone enabling calls to be made and received.
Apart from the use of methanol as a fuel, other lines of investigation currently under way are the perfecting of a design of a new mini fuel cell the protection of which through taking out a patent is being processed; the use of new thin-layer EMAs which will provide greater yields with a significant reduction in the use of noble metals as electrocatalysts and, thus, reduce the cost of the cell.
This project is being directly funded by CEGASA, leader in the manufacture and distribution of alkaline batteries.
Elhuyar Fundazioa
Hydrogen Current Events and Hydrogen News RSSWPI Researchers Take Aim at Hard-to-Treat Fungal Infections
A team of researchers at the Worcester Polytechnic Institute (WPI) Life Sciences and Bioengineering Center at Gateway Park has developed a new model system to study fungal infections.
Proton's party pals may alter its internal structure
A recent experiment at the Department of Energy's Thomas Jefferson National Accelerator Facility has found that a proton's nearest neighbors in the nucleus of the atom may modify the proton's internal structure.
Berkeley Researchers Take the Lead Out of Piezoelectrics
There is good news for the global effort to reduce the amount of lead in the environment and for the growing array of technologies that rely upon the piezoelectric effect.
Vibrations key to efficiency of green fluorescent protein
University of California, Berkeley, chemists have discovered the secret to the success of a jellyfish protein whose green glow has made it the darling of biologists and the subject of the 2008 Nobel Prize in Physiology or Medicine.
Earth's early ocean cooled more than a billion years earlier than thought: Stanford study
The scalding-hot sea that supposedly covered the early Earth may in fact never have existed, according to a new study by Stanford University researchers who analyzed isotope ratios in 3.4 billion-year-old ocean floor rocks.
UT Knoxville and ORNL researchers turn algae into high-temperature hydrogen source
In the quest to make hydrogen as a clean alternative fuel source, researchers have been stymied about how to create usable hydrogen that is clean and sustainable without relying on an intensive, high-energy process that outweighs the benefits of not using petroleum to power vehicles.
Central Africa's tropical Congo Basin was arid, treeless in Late Jurassic
The Congo Basin - with its massive, lush tropical rain forest - was far different 150 million to 200 million years ago. At that time Africa and South America were part of the single continent Gondwana.
Engineers image nanostructure of a solid acid catalyst and boost its catalytic activity
The catalytic processes that facilitate the production of many chemicals and fuels could become much more environmentally friendly thanks to a breakthrough achieved by researchers from Lehigh and Rice Universities.
'Dropouts' pinpoint earliest galaxies
Astronomers, conducting the broadest survey to date of galaxies from about 800 million years after the Big Bang, have found 22 early galaxies and confirmed the age of one by its characteristic hydrogen signature at 787 million years post Big Bang.
Computer predicts reactions between molecules and surfaces, with 'chemical precision'
Good news for heterogeneous catalysis and the hydrogen economy: computers can now be used to make accurate predictions of the reactions of (hydrogen) molecules with surfaces. An international team of researchers, headed by Leiden theoretical chemist Geert-Jan Kroes, published on this subject this week in the journal Science.
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