The smart researchers from France and the US have come up with a micro supercapacitor that has some interesting potential. The capacitor uses electrodes made of onion-like carbon, a material where each individual particle is made up of concentric spheres of carbon atoms that are 6-7 nanometers in diameter. Thanks to the higher surface area per volume of the electrode material, the performance of the capacitor is improved dramatically, allowing it to deliver power in just milliseconds, faster than any battery or supercapacitor that is currently used in backup power supplies, wind power generators and other machinery. Such capacitors would be useful to mobile electronics, wireless networks, biomedical implants, RFID tags and even embedded micro sensors.