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Título

Electrochemical supercapacitors based on novel hybrid materials made of carbon nanotubes and polyoxometalates

AutorCuentas Gallegos, A. K.; Martínez-Rosales, Rosa; Baibarac, Mihaela; Gómez-Romero, P. ; Rincón, Marina E.
Palabras clavePolyoxometalates
Hybrid materials
Multiwalled carbon nanotubes
Supercapacitors
Energy density
Fecha de publicaciónago-2007
EditorElsevier
CitaciónElectrochemistry Communications 9(8): 2088-2092 (2007)
ResumenWe have characterized symmetric solid-state supercapacitors in swagelok cells using film electrodes made of novel hybrid materials based on multiwalled carbon nanotubes (CNT) and phosphomolybdate polyanion (Cs-PMo12) with PVA as binder. These hybrid materials were carried out by Cs-PMo12 adhesion onto previously functionalized CNT, in order to disperse both components at a molecular level and use Cs-PMo12 as energy density enhancer in supercapacitor cells. Our results show high capacitance values (up to 285 F/g at I = 200 mA/g) due to the contribution of Cs-PMo12, which was revealed on the higher energy density values compared to pure CNT electrodes. Additionally, good stability was observed during 500 charge–discharge cycles for most hybrid electrodes. These preliminary results show a new approach to enhance energy density of double layer supercapacitor cells through the introduction of Cs-PMo12, whereas from a material science point of view these materials are innovative, and open the way to search for diverse applications aside from supercapacitors (sensors, catalysts, photovoltaic cells, etc.)
Versión del editorhttp://dx.doi.org/10.1016/j.elecom.2007.06.003
URIhttp://hdl.handle.net/10261/15649
DOI10.1016/j.elecom.2007.06.003
ISSN1388-2481
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