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Preparation of Graphene-Containing Electrodes

: Siong, Victor

Fraunhofer-Institut für Produktionstechnik und Automatisierung -IPA-, Stuttgart:
ElectroGraph Dissemination Workshop 2012 : November 16th, 2012, Stuttgart
Stuttgart, 2012
22 Folien
ElectroGraph Dissemination Workshop <2012, Stuttgart>
European Commission EC
Conference Paper
Fraunhofer IPA ()
Graphene; supercapacitor; nanotechnology; Energiespeicher; ElectroGraph; Superkondensator; Dispersion; Elektrode; Kapazität (Kondensator); Kondensator

The presentation describes the first attempts undertaken in ElectroGraph project to produce supercapacitor electrodes from the in-house exfoliated graphene nano-platelets (GNP) and from commercial materials. The steps include dispersing GNPs in aqueous solvents with the assist of ultra-sonication and centrifugation to improve homogeneity of the final dispersion. Finally, spray coating method was used to deposit the GNPs on the aluminium foil current collector. The specific capacitances of the electrodes were electrochemically determined and the results are shown in the presentation. Through the drop in the electrodes' capacitance after repeated charging and discharging, it has been shown that the adhesion of the electro-active coating on the substrate have to be improved.