Title :

Solid-state 3D micro-supercapacitors based on ionogel electrolyte: Influence of adding lithium and sodium salts to the ionic liquid

Author(s) :

Guillemin, Thibaud [Auteur]
Douard, Camille [Auteur]
Institut des Matériaux Jean Rouxel [IMN]
Robert, Kévin [Auteur]
Circuits Systèmes Applications des Micro-ondes - IEMN [CSAM - IEMN ]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Asbani, Bouchra [Auteur]
Laboratoire de Physique de la Matière Condensée - UR UPJV 2081 [LPMC]
Lethien, Christophe [Auteur correspondant]
Circuits Systèmes Applications des Micro-ondes - IEMN [CSAM - IEMN ]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Brousse, Thierry [Auteur correspondant]
Institut des Matériaux Jean Rouxel [IMN]
Le Bideau, Jean [Auteur correspondant]
Institut des Matériaux Jean Rouxel [IMN]

Journal title :

Energy Storage Materials

Pages :

606-617

Publisher :

Elsevier

Publication date :

2022-09

ISSN :

2405-8297

English keyword(s) :

Microsupercapacitor
Interdigitated-3D-scaffold
MnO2
ionogel
Li-Na

HAL domain(s) :

Sciences de l'ingénieur [physics]

English abstract : [en]

The ever-increasing interest in miniaturized Internet of Things devices and embedded electronics has given rise to a host of inquiries surrounding the need for safe, high performance energy storage devices. Solid-state 3D ...
Show more >The ever-increasing interest in miniaturized Internet of Things devices and embedded electronics has given rise to a host of inquiries surrounding the need for safe, high performance energy storage devices. Solid-state 3D micro-supercapacitors based on ionogels provide a promising response to many of these pressing questions. Herein, leakage-free solid-state-like 3D micro-supercapacitors incorporating lithium and sodium salts added to 1-Ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide-based ionogels were investigated. The resulting micro-supercapacitors containing these lithium and sodium ions displayed energy densities of 10.2 and 9.5 µWh.cm−2 at power densities of 1.1 and 1.0 mW.cm−2, respectively. In those devoid of these alkaline ions, however, the energy density reached a mere 3 µWh.cm−2 at the same power density, thereby validating the proposed strategy. The 3D interdigitated MnO2 // MnO2 micro-supercapacitors were cycled 50 000 times at 1.75 mA.cm−2 with good capacitance retention (∼ 85 %). While performing under high temperatures (100°C), there was no evidence of electrolyte degradation, capacitance fading or electrolyte leakage.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

ANR Project :

Supercondensateurs nanostructurés tout-solides pour stockage d'énergie plus dense et plus sûr
Laboratory of excellency for electrochemical energy storage

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL