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Atomic construction yields punchier power store - tech - 15 March 2009 - New Scientist
University of Maryland researchers have developed a new type of electrostatic capacitor that could replace batteries in some future devices. The new capacitor is, in fact, 10 billion nano-capacitors covering an area 50 nanometres across. The resulting system can discharge quickly (a 1 kg capacitor can deliver 1 megawatt) and has a storage capacity approaching that of supercapacitors (2500 joules per kilogram). They hope to use this device as part of a battery-capacitor hybrid.