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Type: Journal article
Title: 3D hierarchical assembly of ultrathin MnO₂ nanoflakes on silicon nanowires for high performance micro-supercapacitors in Li- doped ionic liquid
Author: Dubal, D.
Aradilla, D.
Bidan, G.
Gentile, P.
Schubert, T.
Wimberg, J.
Sadki, S.
Gomez-Romero, P.
Citation: Scientific Reports, 2015; 5(1):09771-1-09771-10
Publisher: Nature Publishing Group
Issue Date: 2015
ISSN: 2045-2322
Statement of
Deepak P. Dubal, David Aradilla, Gérard Bidan, Pascal Gentile, Thomas J.S. Schubert, Jan Wimberg, Saïd Sadki, Pedro Gomez-Romero
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 Liion 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 2.2 V and exhibits a high areal capacitance of 13 mFcm⁻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.
Rights: This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit
DOI: 10.1038/srep09771
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