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In Situ Magnetic Resonance Imaging of a Complete Supercapacitor Giving Additional Insight on the Role of Nanopores

Oukali, Ghenima and Salager, Elodie and Ammar, Mohamed Ramzi and Dutoit, Charles-Emmanuel and Sarou-Kanian, Vincent and Simon, Patrice and Raymundo-Piñero, Encarnacion and Deschamps, Michaël In Situ Magnetic Resonance Imaging of a Complete Supercapacitor Giving Additional Insight on the Role of Nanopores. (2019) ACS Nano, 13 (11). 12810-12815. ISSN 1936-0851

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Official URL: https://doi.org/10.1021/acsnano.9b04998

Abstract

Nuclear magnetic resonance is one of the rare techniques able to probe selectively the ions inside the nanoporous network in supercapacitor devices. With amagnetic resonance imaging method able to detect all ions(adsorbed and nonadsorbed), we record one-dimensional concentration profiles of the active ions in supercapacitors with an electrode configuration close to that used inindustry. Larger anionic concentration changes are probed upon charge and discharge in a carbide-derived carbon(CDC) with micropores smaller than 1 nm compared to a conventional nanoporous carbon (CC) with a larger distribution of pore sizes, up to 2 nm. They highlight the increased interaction of the anions with CDC and provide a better understanding of the enhanced capacitance in CDC-based supercapacitors.

Item Type:Article
HAL Id:hal-02521896
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Aix-Marseille Université - AMU (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Collège de France (FRANCE)
Other partners > Ecole Nationale Supérieure de Chimie de Paris - ENSCP (FRANCE)
Other partners > Ecole Nationale Supérieure de Chimie de Montpellier - ENSCM (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Institut polytechnique de Grenoble (FRANCE)
Other partners > Sorbonne Université (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Université de Nantes (FRANCE)
Other partners > Université de Picardie Jules Verne (FRANCE)
Other partners > Université de Pau et des Pays de l'Adour - UPPA (FRANCE)
Other partners > Université de Haute Alsace - UHA (FRANCE)
Other partners > Université de Montpellier (FRANCE)
Other partners > Université d'Orléans (FRANCE)
Laboratory name:
Funders:
Agence Nationale de la Recherche - ANR - Réseau sur le Stockage Electrochimique del’Energie - RS2E
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Deposited On:27 Mar 2020 15:38

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