Mimics of microstructures of Ni substituted Mn1−xNixCo2O4 for high energy density asymmetric capacitors
Tamboli, Mohaseen S. (Solapur University. School of Chemical Sciences)
Dubal, Deepak P. (Institut Català de Nanociència i Nanotecnologia)
Patil, Santosh S. (Centre for Materials for Electronics Technology)
Shaikh, Asiya F. (Centre for Materials for Electronics Technology)
Deonikar, Virendrakumar G. (Centre for Materials for Electronics Technology)
Kulkarni, Milind V. (Centre for Materials for Electronics Technology)
Maldar, Noormahamad N. (Solapur University. School of Chemical Sciences)
Gómez-Romero, Pedro 1959- (Institut Català de Nanociència i Nanotecnologia)
Kale, Bharat B. (Centre for Materials for Electronics Technology)
Patil, Deepak R. (Centre for Materials for Electronics Technology)

Date:	2017
Abstract:	The preparation of nanostructured hierarchical MnNiCoO metal oxides as efficient supercapacitors of different structures and configurations especially for the miniaturized electronics is still a challenge. In this context, we report template free facile hydrothermal synthesis of hierarchical nanostructured MnNiCoO with excellent supercapacitive performance. Significantly, the morphology of pure MnCoO transformed from 3D microcubes to 1D nanowires with incorporation of Ni. The electrochemical study shows highest specific capacitance i. e. 1762 F/g for MnNiCoO with high cycling stability of 89. 2% which is much higher than pristine MnCoO and NiCoO. Later, asymmetric capacitor has been fabricated successfully using MnNiCoO nanowires as positive electrode and activated carbon (AC) as negative electrode in a KOH aqueous electrolyte. An asymmetric cell could be cycled reversibly in the high-voltage range of 0-1. 5 V and displays intriguing performances with a specific capacitance of 112. 8 F/g (6. 87 F/cm) and high energy density of 35. 2 Wh/kg (2. 1 mWh/cm). Importantly, this asymmetric capacitor device exhibits an excellent long cycle life along with 83. 2% specific capacitance retained after 2000 cycles.
Grants:	Ministerio de Economía y Competitividad SEV-2013-0295 Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-1505
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 sotmesa a revisió
Subject:	Mixed transition metal oxides ; Nanostructures ; Asymmetric capacitor
Published in:	Chemical engineering journal, Vol. 307 (January 2017) , p. 300-310, ISSN 1873-3212

DOI: 10.1016/j.cej.2016.08.086

Preprint 37 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