Retarded saturation of the areal capacitance using 3D-aligned MnO2 thin film nanostructures as a supercapacitor electrode

Abstract The supercapacitive properties of manganese oxide (MnO2) thin films electrodeposited on three-dimensionally (3D) aligned inverse-opal nickel nanostructures are investigated. Compared to conventional planar or two-dimensionally (2D) aligned nanostructures, 3D-aligned nanostructures can provi...

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Auteurs principaux:	Green Kim, Ilhwan Ryu, Sanggyu Yim
Format:	article
Langue:	EN
Publié:	Nature Portfolio 2017
Sujets:	Medicine R Science Q
Accès en ligne:	https://doaj.org/article/9861b21483f94e458fafde870cf3cb9d
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spelling	oai:doaj.org-article:9861b21483f94e458fafde870cf3cb9d2021-12-02T16:06:30ZRetarded saturation of the areal capacitance using 3D-aligned MnO2 thin film nanostructures as a supercapacitor electrode10.1038/s41598-017-09039-x2045-2322https://doaj.org/article/9861b21483f94e458fafde870cf3cb9d2017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-09039-xhttps://doaj.org/toc/2045-2322Abstract The supercapacitive properties of manganese oxide (MnO2) thin films electrodeposited on three-dimensionally (3D) aligned inverse-opal nickel nanostructures are investigated. Compared to conventional planar or two-dimensionally (2D) aligned nanostructures, 3D-aligned nanostructures can provide considerably increased and controllable contacts between the electrode and electrolyte. As a result, saturation of the areal capacitance with the electrode thickness and associated decrease of the specific capacitance, C sp , become much slower than those of the planar and 2D-aligned electrode systems. While, for planar MnO2 electrodes, the C sp of a 60-cycle electrodeposited electrode is only the half of the 10-cycle electrodeposited one, the value of the 3D-nanostructured electrode remains unchanged under the same condition. The maximum C sp value of 864 F g−1, and C sp retention of 87.7% after 5000 cycles of galvanostatic charge-discharge are obtained. The voltammetric response is also improved significantly and the C sp measured at 200 mV s−1 retains 71.7% of the value measured at 10 mV s−1. More quantitative analysis on the effect of this 3D-aligned nanostructuring is also performed using a deconvolution of the capacitive elements in the total capacitance of the electrodes.Green KimIlhwan RyuSanggyu YimNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Green Kim Ilhwan Ryu Sanggyu Yim Retarded saturation of the areal capacitance using 3D-aligned MnO2 thin film nanostructures as a supercapacitor electrode
description	Abstract The supercapacitive properties of manganese oxide (MnO2) thin films electrodeposited on three-dimensionally (3D) aligned inverse-opal nickel nanostructures are investigated. Compared to conventional planar or two-dimensionally (2D) aligned nanostructures, 3D-aligned nanostructures can provide considerably increased and controllable contacts between the electrode and electrolyte. As a result, saturation of the areal capacitance with the electrode thickness and associated decrease of the specific capacitance, C sp , become much slower than those of the planar and 2D-aligned electrode systems. While, for planar MnO2 electrodes, the C sp of a 60-cycle electrodeposited electrode is only the half of the 10-cycle electrodeposited one, the value of the 3D-nanostructured electrode remains unchanged under the same condition. The maximum C sp value of 864 F g−1, and C sp retention of 87.7% after 5000 cycles of galvanostatic charge-discharge are obtained. The voltammetric response is also improved significantly and the C sp measured at 200 mV s−1 retains 71.7% of the value measured at 10 mV s−1. More quantitative analysis on the effect of this 3D-aligned nanostructuring is also performed using a deconvolution of the capacitive elements in the total capacitance of the electrodes.
format	article
author	Green Kim Ilhwan Ryu Sanggyu Yim
author_facet	Green Kim Ilhwan Ryu Sanggyu Yim
author_sort	Green Kim
title	Retarded saturation of the areal capacitance using 3D-aligned MnO2 thin film nanostructures as a supercapacitor electrode
title_short	Retarded saturation of the areal capacitance using 3D-aligned MnO2 thin film nanostructures as a supercapacitor electrode
title_full	Retarded saturation of the areal capacitance using 3D-aligned MnO2 thin film nanostructures as a supercapacitor electrode
title_fullStr	Retarded saturation of the areal capacitance using 3D-aligned MnO2 thin film nanostructures as a supercapacitor electrode
title_full_unstemmed	Retarded saturation of the areal capacitance using 3D-aligned MnO2 thin film nanostructures as a supercapacitor electrode
title_sort	retarded saturation of the areal capacitance using 3d-aligned mno2 thin film nanostructures as a supercapacitor electrode
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/9861b21483f94e458fafde870cf3cb9d
work_keys_str_mv	AT greenkim retardedsaturationofthearealcapacitanceusing3dalignedmno2thinfilmnanostructuresasasupercapacitorelectrode AT ilhwanryu retardedsaturationofthearealcapacitanceusing3dalignedmno2thinfilmnanostructuresasasupercapacitorelectrode AT sanggyuyim retardedsaturationofthearealcapacitanceusing3dalignedmno2thinfilmnanostructuresasasupercapacitorelectrode
_version_	1718384977027006464

Retarded saturation of the areal capacitance using 3D-aligned MnO2 thin film nanostructures as a supercapacitor electrode

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