Functionalization of Polypyrrole Nanopipes with Redox-Active Polyoxometalates for High Energy Density Supercapacitors
Dubal, Deepak P. (Institut Català de Nanociència i Nanotecnologia)
Ballesteros, Belén (Institut Català de Nanociència i Nanotecnologia)
Mohite, Ashwini A. (Institut Català de Nanociència i Nanotecnologia)
Gómez-Romero, Pedro 1959- (Institut Català de Nanociència i Nanotecnologia)

Additional title:	"Nailing" Redox-active Polyoxometalates (POMs) to Polypyrrole Nano-pipes for Ultrahigh Energy Density Supercapacitors
Date:	2017
Abstract:	Hybrid materials are very attractive for the fabrication of high-performance supercapacitors. Here, we have explored organic-inorganic hybrid materials based on open-end porous 1 D polypyrrole nanopipes (PPy-NPipes) and heteropolyoxometalates (phosphotungstate ([PWO], PW) or phosphomolybdate ([PMoO], PMo)) that display excellent areal capacitances. Two different hybrid materials (PMo@PPy and PW@PPy) were effectively synthesized and used for symmetric supercapacitors. The anchoring of the inorganic nanoclusters onto the conducting polymer nanopipes led to electrodes that stood up to our best expectations exhibiting outstanding areal capacitances that are almost 1. 5 to 2 fold higher than that of pristine PPy-NPipes. In addition, symmetric cells based on PMo@PPy and PW@PPy hybrid electrodes were fabricated and showed significant improvement in cell performance with very high volumetric capacitances in the range of 6. 3-6. 8 F cm(considering the volume of whole device). Indeed, they provide extended potential windows in acidic electrolytes (up to 1. 5 V) which led to ultrahigh energy densities of 1. 5 and 2. 2 mWh cmfor PMo@PPy and PW@PPy cells, respectively. Thus, these unique organic-inorganic hybrid symmetric cells displayed extraordinary electrochemical performances far exceeding those of more complex asymmetric systems.
Grants:	Ministerio de Economía y Competitividad MAT2015-68394-R Ministerio de Economía y Competitividad SEV-2013-0295
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Subject:	Nanocomposite ; Nanopipes ; Polyoxometalates ; Polypyrrole ; Supercapacitors
Published in:	ChemSusChem, Vol. 10, Issue 4 (February 2017) , p. 731-737, ISSN 1864-564X

DOI: 10.1002/cssc.201601610

Preprint 30 p, 2.1 MB

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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