3D hierarchical assembly of ultrathin MnO₂ nanoflakes on silicon nanowires for high performance micro-supercapacitors in Li-doped ionic liquid
Dubal, Deepak P. (Institut Català de Nanociència i Nanotecnologia)
Aradilla, David (Université Grenoble Alpes. Institute Nanosciences et Cryogénie)
Bidan, Gérard (Université Grenoble Alpes. Institute Nanosciences et Cryogénie)
Gentile, Pascal (Université Grenoble Alpes. Institute Nanosciences et Cryogénie)
Schubert, Thomas J. S. (IOLITEC Ionic Liquids Technologies GmbH)
Wimberg, Jan (IOLITEC Ionic Liquids Technologies GmbH)
Sadki, Saïd (Université Grenoble Alpes. Institute Nanosciences et Cryogénie)
Gómez-Romero, Pedro 1959- (Institut Català de Nanociència i Nanotecnologia)

Date:	2015
Abstract:	Building of hierarchical core-shell hetero-structures is currently the subject of intensive research in the electrochemical field owing to its potential for making improved electrodes for high-performance micro-supercapacitors. Here we report a novel architecture design of hierarchical MnO₂@silicon nanowires (MnO₂@SiNWs) hetero-structures directly supported onto silicon wafer coupled with Li-ion doped 1-Methyl-1-propylpyrrolidinium bis(trifluromethylsulfonyl)imide (PMPyrrBTA) ionic liquids as electrolyte for micro-supercapacitors. A unique 3D mesoporous MnO₂@SiNWs in Li-ion doped IL electrolyte can be cycled reversibly across a voltage of 2. 2V and exhibits a high areal capacitance of 13mFcm⁻². The high conductivity of the SiNWs arrays combined with the large surface area of ultrathin MnO₂ nanoflakes are responsible for the remarkable performance of these MnO₂@SiNWs hetero-structures which exhibit high energy density and excellent cycling stability. This combination of hybrid electrode and hybrid electrolyte opens up a novel avenue to design electrode materials for high-performance micro-supercapacitors.
Grants:	European Commission 309143 Ministerio de Economía y Competitividad SEV-2013-0295
Note:	Altres ajuts: Programa Beatriu de Pinós (BP-DGR-2013)
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Published in:	Scientific reports, Vol. 5 (May 2015) , art. 9771, ISSN 2045-2322

DOI: 10.1038/srep09771
PMID: 25985388

10 p, 2.2 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