Bello, AbdulhakeemFabiane, MopeliMomodu, Damilola Y.Khamlich, SalehDangbegnon, Julien K.Manyala, Ncholu I.2014-09-292014-09Bello, A, Fabiane, M, Momodu, DY, Khamlich, S, Dangbegnon, JK & Manyala, N 2014, 'Functionalized graphene foam as electrode for improved electrochemical storage', Journal of Solid State Electrochemistry, vol. 18, no. 9, pp. 2359-2365.1432-8488 (print)1433-0768 (online)10.1007/s10008-014-2473-4http://hdl.handle.net/2263/42119We report on a non-covalent functionalization of graphene foam (GF) synthesized via chemical vapour deposition (CVD). The GF was treated with pyrene carboxylic acid (PCA) which acted as a source of oxygen and/or hydroxyl groups attached to the surface of the graphene foam for its electrochemical performance improvement. The modified graphene surface enabled a high pseudocapacitive effect on the GF. A specific capacitance of 133.3 F g−1, power density ∼ 145.3 kW kg−1 and energy density ∼ 4.7 W h kg−1 were achieved based on the functionalized foam in 6 M KOH aqueous electrolyte. The results suggest that non-covalent functionalization might be an effective approach to overcome the restacking problem associated with graphene electrodes and also signify the importance of surface functionalities in graphene-based electrode materials.en© Springer-Verlag Berlin Heidelberg 2014. The original publication is available at : http://link.springer.com/journal/10008.Graphene foam (GF)Pyrene carboxylic acid (PCA)Chemical vapour deposition (CVD)SupercapacitorPostprint Article