The world’s smallest solid-oxide fuel cell( SOFC), as small as a sugar cube, was recently developed by the National Institute of Advanced Industrial Science and Technology (AIST). The sugar cube-sized SOFC is operable at 550°C.
To increase the ratio of electrode area to volume the size of the cylindrical cell was substantially downsized. The sugar cube-sized SOFC, which is made up of twenty five needle-like modules, each with a diameter of 0.8mm, can generate 3W of electricity.
Solid-oxide fuel cells are characterized by their high efficiency ( works at only 500° C) compared to other fuel cells (operate between 700 and 1,000° C), being appropriate for power cogeneration and generation.
According to AIST, one day fuel cell vehicles could be powered by the new SOFC. Now, the fuel cell is intended for use by automotive APUs.
Via Techon
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While nobody seems to speak much about them, solid acid fuel cells are actually a much cheaper way to produce energy from impure hydrogen sources, with much more flexibility than PEM fuel cells have.
The simplest fuel cell ‘burns’ hydrogen in a flameless chemical reaction to produce electricity. In order to ‘burn’ the hydrogen, a fuel cell needs a source of oxygen and this is usually obtained from air. The only by-product from this type of fuel cell is water. Unlike a battery, a fuel cell does not store [...]
In their search to make better fuel cells, a research team from the National Institute of Standards and Technology (NIST), in collaboration with the University of Liverpool, has discovered a new structure that moves oxygen ions through the cell at substantially lower temperatures than previously thought possible.
Current hydrogen fuel cells work at temperatures for up to 100°C for PEM types, and up to 300°C for SAFC (solid acid). The problem with these, although I don’t agree with their developmental direction, is that they don’t tolerate carbon very easily, and pure hydrogen is very hard to obtain from carbon-rich sources, such as methane or petrol.
What can you buy for $38,000? Two second-hand Priuses? No. A smaller airplane? Neither. I’ll tell you what you can have for that money: a solar powered desalination device.





#1 by WhichBurner on June 4, 2009 - 3:03 am
I really liked that, thanks and please carry on