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Performance of mesoporous carbons derived from poly(vinyl alcohol) in electrochemical capacitors

AutorFernández López, José Antonio ; Morishita, T.; Toyoda, M.; Inagak, M.; Stoeckli, F.; Álvarez Centeno, Teresa
Palabras claveElectrochemical capacitor
Surface area
Fecha de publicación3-ene-2008
CitaciónJournal of Power Sources 175(1): 675-679 (2008)
ResumenThe present work shows that mesoporous materials obtained by the carbonization of mixtures of poly(vinyl alcohol) with magnesium citrate are very promising candidates for electrodes in supercapacitors. Their high performance arises essentially from a double-layer mechanism through the extent of the total surface area and one obtains at low current density (1 mA cm−2) values as high as 180 F g−1 in aqueous 2 M H2SO4 electrolyte and around 100 F g−1 in 1 M (C2H5)4 NBF4 in acetonitrile. Moreover, in most cases the specific capacitance is reduced only by 15% at 100 mA cm−2, as opposed to many other types of carbons which display much higher reductions.
This study suggests that these novel carbons could be potentially more advantageous as electrodes in electrochemical capacitors than templated mesoporous carbons.
Descripción5 pages, 6 figures, 1 table.-- Available online Sep 21, 2007.
Versión del editorhttp://dx.doi.org/10.1016/j.jpowsour.2007.09.042
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