Publication: Graphene foam functionalized with electrodeposited nickel hydroxide for energy applications
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Elsevier Science SA
The need of new systems for the storage and conversion of renewable energy sources is fueling the research in supercapacitors. In this work, we propose a low temperature route for the synthesis of electrodes for these supercapacitors: electrodeposition of a transition metal hydroxide-Ni(OH)₂ on a graphene foam. This electrode combines the superior mechanical and electrical properties of graphene, the large specific surface area of the foam and the large pseudocapacitance of Ni(OH)₂. We report a specific capacitance up to 900 F/g as well as specific power and energy comparable to active carbon electrodes. These electrodes are potential candidates for their use in energy applications.
© Elsevier Science SA. We thank J. Velázquez, from the C.A.I. de Difracción de Rayos X de la Universidad Complutense de Madrid, for XRD measurements and J.M. Rojo y V. Barranco from Instituto de Ciencia de Materiales de Madrid (CSIC) for the measurements on axsorb electrodes. This research was supported by Repsol under the Inspire program.