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Charge Storage Mechanisms of Single-Layer Graphene in Ionic Liquid

Ye, Jianglin and Wu, Yih-Chyng and Xu, Kui and Ni, Kun and Shu, Na and Taberna, Pierre-Louis and Zhu, Yanwu and Simon, Patrice Charge Storage Mechanisms of Single-Layer Graphene in Ionic Liquid. (2019) Journal of the American Chemical Society, 141 (42). 16559-16563. ISSN 0002-7863

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Official URL: https://doi.org/10.1021/jacs.9b07134

Abstract

Graphene-based carbon materials are promising candidates for electrical double-layer (EDL) capacitors, and there is considerable interest in understanding the structure and properties of the graphene/electrolyte interface. Here, electrochemical impedance spectroscopy (EIS) and electrochemical quartz crystal microbalance (EQCM) are used to characterize the ion fluxes and adsorption on single-layer graphene in neat ionic liquid (EMI-TFSI) electrolyte. It is found that a positively charged ion-species desorption and ion reorganization dominate the double-layer charging during positive and negative polarizations, respectively, leading to the increase in EDL capacitance with applied potential.

Item Type:Article
HAL Id:hal-02519714
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 > University of Science and Technology of China - USTC (CHINA)
Laboratory name:
Funders:
Natural Science Foundation of China - Agence Nationale de la Recherche - ANR
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Deposited On:26 Mar 2020 10:30

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