An activated carbon monolith as an electrode material for supercapacitors

descriptionPublicationkeyboard_double_arrow_right Article 01 Jan 2009 English Publisher:Elsevier BVJournal:Carbon, volume 47, pages 195-200 (issn: 0008-6223,

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Authors: Ruiz Ruiz, Vanesa; Blanco Rodríguez, Clara; Santamaría Ramírez, Ricardo; Ramos-Fernández, J. M.; Martínez-Escandell, M.; Sepúlveda-Escribano, A.; Rodríguez-Reinoso, F.;

doi: 10.1016/j.carbon.2008.09.048

handle: 10261/11255

An activated carbon monolith as an electrode material for supercapacitors

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Abstract

Activated carbon binderless monoliths with high consistency and large porosity, synthesised from a mesophase pitch, are studied as electrodes for supercapacitors. The electrochemical cells prepared provided high capacitance values in sulphuric acid media (334 F g−1) and very low electrical resistivity, which results in a very efficient energy storage device (12 Wh Kg−1 maximum energy density and 12,000 W Kg−1 maximum power density). Long-term cycling experiments showed excellent stability with a reduction of the initial capacitance values of 19% after performing 23,000 galvanostatic cycles at ~300 mA g−1.

This work has been performed with financial support from MEC (projects MAT2007-61467 and MAT2007-61734). V. Ruiz acknowledges a predoctoral research grant from FICYT.

6 pages, 6 figures, 1 table.-- Available online Oct 2, 2008.

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Keywords

Polyaniline, Surface, Pitch, Deionization, Behaviour, Electrochemical capacitors, Porosity, Aerogel electrodes, Pyrolysis

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