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Charge Storage Mechanisms of Single-Layer Graphene in Ionic Liquid
- Source :
- Journal of the American Chemical Society, Journal of the American Chemical Society, 2019, 141 (42), pp.16559-16563. ⟨10.1021/jacs.9b07134⟩, Journal of the American Chemical Society, American Chemical Society, 2019, 141 (42), pp.16559-16563. ⟨10.1021/jacs.9b07134⟩
- Publication Year :
- 2019
- Publisher :
- HAL CCSD, 2019.
-
Abstract
- International audience; 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.
- Subjects :
- Energie électrique
Matériaux
Interfaces
Electrolyte
010402 general chemistry
Electrochemistry
01 natural sciences
7. Clean energy
Biochemistry
Capacitance
Catalysis
law.invention
Ion
[SPI.MAT]Engineering Sciences [physics]/Materials
chemistry.chemical_compound
Colloid and Surface Chemistry
law
Two dimensional materials
Electrodes
Ions
Graphene
[SPI.NRJ]Engineering Sciences [physics]/Electric power
General Chemistry
Quartz crystal microbalance
0104 chemical sciences
Dielectric spectroscopy
chemistry
Chemical engineering
Ionic liquid
Electrical properties
Subjects
Details
- Language :
- English
- ISSN :
- 00027863 and 15205126
- Database :
- OpenAIRE
- Journal :
- Journal of the American Chemical Society, Journal of the American Chemical Society, 2019, 141 (42), pp.16559-16563. ⟨10.1021/jacs.9b07134⟩, Journal of the American Chemical Society, American Chemical Society, 2019, 141 (42), pp.16559-16563. ⟨10.1021/jacs.9b07134⟩
- Accession number :
- edsair.doi.dedup.....05c3e2f4c688690e1576ea4f4ba07435