Investigation of protic ionic liquid electrolytes for porous RuO2 micro-supercapacitors
- Others:
- Équipe Nano-ingénierie et intégration des oxydes métalliques et de leurs interfaces (LAAS-NEO) ; Laboratoire d'analyse et d'architecture des systèmes (LAAS) ; Université Toulouse 1 Capitole (UT1) ; Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse) ; Institut National des Sciences Appliquées (INSA)-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3) ; Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP) ; Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse 1 Capitole (UT1) ; Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse) ; Institut National des Sciences Appliquées (INSA)-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3) ; Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP) ; Université Fédérale Toulouse Midi-Pyrénées
- Département de chimie [UdeM-Montréal] ; Université de Montréal (UdeM)
- ERC Consolidator Grant 3D-CAP
- European Project: 771793,H2020,ERC-2017-COG,ERC 3D-CAP(2018)
Citation
Description
The rapid advancement of the Internet of things (IoT) with applications across various sectors urges the development of miniaturized energy-storage devices that can harvest or deliver energy with high power capabilities. While micro-supercapacitors can meet the high-power requirements of ubiquitous sensors connected to IoT networks, their low voltage and low energy density remain a major bottleneck preventing their wide-scale adoption. In this report, we develop micro-supercapacitors using RuO2 electrodes providing pseudocapacitive charge storage in protic ionic liquid-based non-aqueous electrolytes while enlarging their operational voltage. The triethylammonium bis(trifluoromethanesulfonyl)imide (TEAH-TFSI)-based interdigitated porous RuO2 micro-supercapacitors showed an extended cell voltage up to 2 V with 4 times more energy density compared with conventional H2SO4 electrolyte. We then developed an all-solid-state micro-supercapacitor using TEAH-TFSI-based ionogel electrolyte able to deliver high areal capacitance (78 mF cm-2 at 2 mV s-1) and long-term cycling stability that is superior to state-of-the-art ionogel-based micro-supercapacitors employing carbonbased or pseudocapacitive materials. This study gives a new perspective to develop all-solidstate micro-supercapacitors using pseudocapacitive active materials that can operate in ionicliquid-based non-aqueous electrolytes compatible with on-chip IoT-based device applications seeking high areal energy/ power performance.
Abstract
International audience
Additional details
- URL
- https://hal.laas.fr/hal-03773385
- URN
- urn:oai:HAL:hal-03773385v1
- Origin repository
- UNICA