Are SAXS and SANS suitable to extract information on the role of water for electric-double-layer formation at the carbon-aqueous-electrolyte interface?
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in: Faraday Discussions, Jahrgang 2024, Nr. 249, 16.08.2023, S. 363-380.
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
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T1 - Are SAXS and SANS suitable to extract information on the role of water for electric-double-layer formation at the carbon-aqueous-electrolyte interface?
AU - Seyffertitz, Malina
AU - Stock, Sebastian
AU - Rauscher, Max
AU - Prehal, Christian
AU - Haas, Sylvio
AU - Porcar, Lionel
AU - Paris, Oskar
N1 - Publisher Copyright: © 2023 The Royal Society of Chemistry. Publisher Copyright: © 2024 The Royal Society of Chemistry.
PY - 2023/8/16
Y1 - 2023/8/16
N2 - This study reports on the applicability of X-ray transmission (XRT), small- and wide-angle X-ray scattering (SAXS/WAXS) and small-angle neutron scattering (SANS) for investigating fundamental processes taking place in the working electrode of an electric double-layer capacitor with 1M RbBr aqueous electrolyte at different applied potentials. XRT and incoherent neutron scattering are employed to determine global ion- and water concentration changes and associated charge-balancing mechanisms. We showcase the suitability of SAXS and SANS to get complementary information on local ion and solvent rearrangement in nanoconfinement, respectively, but also underscore the limitations of simple qualitative models, asking for more quantitative descriptions of water-water and ion-water interactions via detailed atomistic modelling approaches.
AB - This study reports on the applicability of X-ray transmission (XRT), small- and wide-angle X-ray scattering (SAXS/WAXS) and small-angle neutron scattering (SANS) for investigating fundamental processes taking place in the working electrode of an electric double-layer capacitor with 1M RbBr aqueous electrolyte at different applied potentials. XRT and incoherent neutron scattering are employed to determine global ion- and water concentration changes and associated charge-balancing mechanisms. We showcase the suitability of SAXS and SANS to get complementary information on local ion and solvent rearrangement in nanoconfinement, respectively, but also underscore the limitations of simple qualitative models, asking for more quantitative descriptions of water-water and ion-water interactions via detailed atomistic modelling approaches.
UR - http://www.scopus.com/inward/record.url?scp=85174402388&partnerID=8YFLogxK
U2 - 10.1039/D3FD00124E
DO - 10.1039/D3FD00124E
M3 - Article
C2 - 37795935
AN - SCOPUS:85174402388
VL - 2024
SP - 363
EP - 380
JO - Faraday Discussions
JF - Faraday Discussions
SN - 1359-6640
IS - 249
ER -
