Researchers at Rice University in the US have built a new supercapacitor based on a 3D nanoporous nickel hydroxide thin film. The device has a high capacitance of 192 F/g, an energy density of 68 Wh/kg and a power density of 44 kW/kg at a wide working potential of up to 1.6 V – and this is over 10,000 cycles of charging and discharging. These properties could make the thin film ideal for practical supercapacitors…..
http://nanotechweb.org/cws/article/tech/58658