84 Producing Fuels and Fine Chemicals from Biomass Using Nanomaterials
–OH and –COOH), which showed specic capacitance of 135 and 99 F/g in aque-
ous and organic electrolyte, respectively. In addition, high electrical conductivity
gave these materials consistently good performance over a wide range of voltage
scan rates. Chen
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also investigated graphene materials (GMs) as the EC electrode
materials. GMs were prepared from graphite oxide sheets reduced in a gas-phase
reaction with hydrazine. A maximum specic capacitance of 205 F/g and a power
density of 10 kW/kg at the energy density of 28.5 Wh/kg in an aqueous electrolyte
solution were obtained. The supercapacitor manufactured by such carbon exhibited
a very good long cycle life.
Other carbon ...