title: Designing 3D Multihierarchical Heteronanostructures for High-Performance On-Chip Hybrid Supercapacitors: Poly(3,4-(ethylenedioxy)thiophene)-Coated Diamond/Silicon Nanowire Electrodes in an Aprotic Ionic Liquid.
abstract: A versatile and robust hierarchically multifunctionalized nanostructured material made of poly(3,4-(ethylenedioxy)thiophene) (PEDOT)-coated diamond@silicon nanowires has been demonstrated to be an excellent capacitive electrode for supercapacitor devices. Thus, the electrochemical deposition of nanometric PEDOT films on diamond-coated silicon nanowire (SiNW) electrodes using N-methyl-N-propylpyrrolidinium bis((trifluoromethyl)sulfonyl)imide ionic liquid displayed a specific capacitance value of 140 F g(-1) at a scan rate of 1 mV s(-1). The as-grown functionalized electrodes were evaluated in a symmetric planar microsupercapacitor using butyltrimethylammonium bis((trifluoromethyl)sulfonyl)imide aprotic ionic liquid as the electrolyte. The device exhibited extraordinary energy and power density values of 26 mJ cm(-2) and 1.3 mW cm(-2) within a large voltage cell of 2.5 V, respectively. In addition, the system was able to retain 80% of its initial capacitance after 15 000 galvanostatic charge-discharge cycles at a high current density of 1 mA cm(-2) while maintaining a Coulombic efficiency around 100%. Therefore, this multifunctionalized hybrid device represents one of the best electrochemical performances concerning coated SiNW electrodes for a high-energy advanced on-chip supercapacitor.
authors.affiliation: SPRAM, CNRS , F-38000 Grenoble, France.
authors.forename: David
authors.initials: D
authors.lastname: Aradilla
authors.affiliation: Fraunhofer-Institute for Applied Solid State Physics (IAF) , Tullastrasse 72, DE-79108 Freiburg, Germany.
authors.forename: Fang
authors.initials: F
authors.lastname: Gao
authors.affiliation: Fraunhofer-Institute for Applied Solid State Physics (IAF) , Tullastrasse 72, DE-79108 Freiburg, Germany.
authors.forename: Georgia
authors.initials: G
authors.lastname: Lewes-Malandrakis
authors.affiliation: Fraunhofer-Institute for Applied Solid State Physics (IAF) , Tullastrasse 72, DE-79108 Freiburg, Germany.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Müller-Sebert
authors.forename: Pascal
authors.initials: P
authors.lastname: Gentile
authors.forename: Maxime
authors.initials: M
authors.lastname: Boniface
authors.affiliation: SPRAM, CNRS , F-38000 Grenoble, France.
authors.forename: Dmitry
authors.initials: D
authors.lastname: Aldakov
authors.affiliation: IOLITEC, Ionic Liquids Technologies GmbH , Salzstrasse 184, D-74076 Heilbronn, Germany.
authors.forename: Boyan
authors.initials: B
authors.lastname: Iliev
authors.affiliation: IOLITEC, Ionic Liquids Technologies GmbH , Salzstrasse 184, D-74076 Heilbronn, Germany.
authors.forename: Thomas J S
authors.initials: TJ
authors.lastname: Schubert
authors.affiliation: Fraunhofer-Institute for Applied Solid State Physics (IAF) , Tullastrasse 72, DE-79108 Freiburg, Germany.
authors.forename: Christoph E
authors.initials: CE
authors.lastname: Nebel
authors.affiliation: SPRAM, CNRS , F-38000 Grenoble, France.
authors.forename: Gérard
authors.initials: G
authors.lastname: Bidan
keywords: conducting polymers; diamond; ionic liquids; silicon nanowires; supercapacitors