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Anchoring Hydrous RuO2 on Graphene Sheets for High-Performance Electrochemical Capacitors. Adv. Funct. Mater. 2010, 20, 3595¨C3602
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The highest energy density obtained for ROGSCs is 20.1 Wh/kg while the corresponding power density is 50 W/kg (0.1 A/g ). This value is slightly less than that of RuO2 (22.2 Wh/kg), but much higher than that of GSs (3.1 Wh/kg). With increasing power density from 100 W/kg (0.2 A/g) to 1000 W/kg (2 A/g), the energy densities drop very slowly from 22.1 to 17.7 Wh/kg for RuO2 and from 16.6 to 14.0 Wh/kg for ROGSCs. However, ¡­ROGSCs still retain a high energy density of 7.2 Wh/kg at 5000 W/kg (10 A/g) and 4.3 Wh/kg at power densities as high as 10000 W/kg  (20 A/g), thereby exhibiting the good power characteristic of ECs.

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