title: 3D hierarchical assembly of ultrathin MnO2 nanoflakes on silicon nanowires for high performance micro-supercapacitors in Li- doped ionic liquid.
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 2.2 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.
authors.affiliation: Catalan Institute of Nanoscience and Nanotechnology, CIN2, ICN2 (CSIC-ICN), Campus UAB E-08193, Bellaterra, Barcelona.
authors.forename: Deepak P
authors.initials: DP
authors.lastname: Dubal
authors.affiliation: 1] Univ. Grenoble Alpes, INAC-SPRAM, F-38000 Grenoble, France [2] CNRS, SPRAM, F-38000 Grenoble, France [3] CEA, INAC-SPRAM, F-38000 Grenoble, France.
authors.forename: David
authors.initials: D
authors.lastname: Aradilla
authors.affiliation: Univ. Grenoble Alpes, INAC-DIR, F-38000 Grenoble, France, CEA, INAC-DIR F-38000, Grenoble, France.
authors.forename: Gérard
authors.initials: G
authors.lastname: Bidan
authors.affiliation: 1] Univ. Grenoble Alpes, INAC-SP2M-SiNaPs, F-38000 Grenoble, France [2] CEA, INAC-SP2M-SiNaPS, F-38000 Grenoble, France.
authors.forename: Pascal
authors.initials: P
authors.lastname: Gentile
authors.affiliation: IOLITEC Ionic Liquids Technologies GmbH, Salzstrasse 184, 74076, Heilbronn, Germany.
authors.forename: Thomas J S
authors.initials: TJ
authors.lastname: Schubert
authors.affiliation: IOLITEC Ionic Liquids Technologies GmbH, Salzstrasse 184, 74076, Heilbronn, Germany.
authors.forename: Jan
authors.initials: J
authors.lastname: Wimberg
authors.affiliation: 1] Univ. Grenoble Alpes, INAC-SPRAM, F-38000 Grenoble, France [2] CNRS, SPRAM, F-38000 Grenoble, France [3] CEA, INAC-SPRAM, F-38000 Grenoble, France.
authors.forename: Saïd
authors.initials: S
authors.lastname: Sadki
authors.affiliation: 1] Catalan Institute of Nanoscience and Nanotechnology, CIN2, ICN2 (CSIC-ICN), Campus UAB E-08193, Bellaterra, Barcelona [2] Consejo Superior de Investigaciones Científicas (CSIC), Spain.
authors.forename: Pedro
authors.initials: P
authors.lastname: Gomez-Romero