Influence of texture in hybrid carbon-phosphomolybdic acid materials on their performance as electrodes in supercapacitors
Palomino, Pablo (Universidad Complutense de Madrid. Departamento de Química Física)
Suarez-Guevara, Jullieth (Institut Català de Nanociència i Nanotecnologia)
Olivares-Marín, Mara (Institut de Ciència de Materials de Barcelona)
Ruiz Ruiz, Vanesa (Institut Català de Nanociència i Nanotecnologia)
Dubal, Deepak P. (Institut Català de Nanociència i Nanotecnologia)
Gómez-Romero, Pedro 1959- (Institut Català de Nanociència i Nanotecnologia)
Tonti, Dino (Institut de Ciència de Materials de Barcelona)
Enciso, Eduardo (Universidad Complutense de Madrid. Departamento de Química Física)

Date:	2017
Abstract:	In this paper, phosphomolybdic acid HPMoO (PMo) was anchored to four synthetic micro-mesoporous carbons and a commercial one to analyse the relationship between the porous texture of the support, the PMo adsorption and the performance of the resulting hybrid materials as electrodes in supercapacitors. The uptake of PMo on carbon supports follows a clear correlation with the micropore volume, which implies that PMo is mainly adsorbed in microporosity as a consequence of a greater confinement in this kind of pores instead of mesopores. Transmission electron microscopy indicates that the PMo adsorbed is homogeneously dispersed in the carbon texture. Finally, the addition of PMo to the original carbon electrodes provided capacitances up to 293 F per gram of electrode, substantially larger than the 206-240 F g of the unmodified activated carbon. This result represented an increase of up to 35% in terms of gravimetric energy density and 160% in terms of volumetric energy density, after PMo integration into the carbon matrix.
Grants:	Ministerio de Economía y Competitividad MAT2012-39199-C02-01 Ministerio de Economía y Competitividad MAT2012-39199-C02-02 Ministerio de Economía y Competitividad SEV-2013-0295
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Carbon electrode ; Gravimetric energy densities ; Mesoporous carbon ; Micropore volumes ; Phosphomolybdic acid ; Porous texture ; Super capacitor ; Volumetric energy densities
Published in:	Carbon, Vol. 111 (January 2017) , p. 74-82, ISSN 0008-6223

DOI: 10.1016/j.carbon.2016.09.054

Postprint 25 p, 722.8 KB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles