Asymmetric supercapacitor based on nanostructured graphene foam/polyvinyl alcohol/formaldehyde and activated carbon electrodes

作者：Bello Abdulhakeem^*; Barzegar Farshad; Momodu Damilola; Dangbegnon Julien; Taghizadeh Fatemeh; Fabiane Mopeli; Manyala Ncholu

来源：Journal of Power Sources, 2015, 273: 305-311.

DOI：10.1016/j.jpowsour.2014.09.094

• Graphene foam
• Polyvinyl alcohol
• Formaldehyde
• KOH activation
• Asymmetric supercapacitor

We present the electrochemical results of highly porous and interconnected carbon material by activation of graphene foam/polyvinyl alcohol-formaldehyde composite material designated as GF/PVA-F. Asymmetric supercapacitor devices were fabricated using the activated material (GF/PVA-F) and activated carbon (AC) as the positive and negative electrodes respectively. The device exhibited a maximum energy density of 42 mWh cm(-2), a power density of 0.5 W cm(-2) and 98% retention of its initial capacitance after 2000 cycles in an extended cell potential window of 1.8 V in 1 M Na2SO4 aqueous electrolyte. This work shows the great potential of this material for high performance energy storage application.

• 出版日期2015-1-1