At the University of St. Andrews in Scotland, Professor Peter Bruce has developed a battery that uses air as a fuel, called STAIR (St. Andrews Air). Early tests show it has the potential to store 10x more energy than existing lithium-ion batteries for applications like electric cars, mobile phones and notebooks.
The project is funded for four-years and is well into its second year (ending June, 2011). He says, “Our results so far are very encouraging and have far exceeded our expectations”.
The rechargeable air-fueled STAIR battery follows current research efforts looking to replace the expensive lithium cobalt oxide electrodes in existing batteries with more porous carbon electrodes. These, by their very chemical nature, allows the lithium ions and electrons within the cell to react with oxygen in normal air, which acts as a reagent in place of the normal chemicals found inside of a sealed battery.
Should early tests prove out through continued research, such a design will be cheaper to produce than today’s lithium-ion batteries, while providing notably more power, up to 10x that of today’s traditional lithium-ion rechargeable batteries.
source:cnet
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