Friday, January 23, 2009
World's Smallest Fuel Cell Could Power Your Gadgets [Fuel Cells]
This new cell utilizes only four components—a water reservoir and a chamber containing metal hydride separated by a thin membrane with an assembly of electrodes that conduct electricity underneath. Because of the small size of the cell, the team was able to eliminate the pump, pressure sensor, and controlling electronics that create such a power drain in typical fuel cells.
The first designs of the cell were capable of generating 0.7 volts and a current of 0.1 milliamps for 30 hours—but they claim that new versions can deliver 1 milliamp at a similar voltage