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

David Aradilla; Fang Gao; Georgia Lewes-Malandrakis; Wolfgav Mueller-Sebert; Pascal Gentile; Maxime Boniface; Dmitry Aldakov; Boyan Iliev; Thomas J. S. Schubert; Christoph E. Nebel; Gerard Bidan

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

David Aradilla ^{1, 2} Fang Gao ³ Georgia Lewes-Malandrakis ³ Wolfgav Mueller-Sebert ³ Pascal Gentile ^{2, 1} Maxime Boniface ^{2, 1} Dmitry Aldakov ^{2, 1} Boyan Iliev ⁴ Thomas J. S. Schubert ⁴ Christoph E. Nebel ³ Gerard Bidan ^{2, 1}

1 SPRAM - UMR 5819 - Structures et propriétés d'architectures moléculaire

2 NM - Nanostructures et Magnétisme

SP2M - UMR 9002 - Service de Physique des Matériaux et Microstructures : DSM/INAC/SP2M

3 IAF - Fraunhofer Institute for Applied Solid State Physics

4 IOLITECH - Ionic Liquids Technologies GmbH

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)sulfonypimide 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.

Keywords : Micro-Supercapacitors High-Power Carbide Nanowires High-Energy Density Supercapacitors Diamond Conducting Polymers Silicon Nanowires Ionic Liquids Doped Silicon Nanowires Porous Carbon Electrodes

Document type :

Journal articles

Domain :

Physics [physics]

Complete list of metadatas

https://hal-cea.archives-ouvertes.fr/cea-01849347
Contributor : Jérôme Planès <>
Submitted on : Thursday, July 26, 2018 - 9:27:29 AM
Last modification on : Wednesday, October 9, 2019 - 1:14:38 AM

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

Identifiers

Collections

Citation

Export

Metrics

85

Contact

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

Identifiers

Collections

Citation

Export

Share

Metrics

85

Contact