Ion and proton transport in aqueous/nonaqueous acidic tonic liquids for fuel-cell applications-insight from high-pressure dielectric studies
| Autor: | Zaneta Wojnarowska, Andreas Taubert, Alyna Lange, Marian Paluch |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
02 engineering and technology Electrolyte Dielectric Conductivity 010402 general chemistry Electrochemistry 01 natural sciences ion transport chemistry.chemical_compound acidic ionic liquids Proton transport General Materials Science dielectric spectroscopy Aqueous solution 021001 nanoscience & nanotechnology 0104 chemical sciences Dielectric spectroscopy high pressure chemistry Chemical engineering Ionic liquid ddc:540 Institut für Chemie proton hopping 0210 nano-technology ddc:600 Research Article |
| Zdroj: | ACS Applied Materials & Interfaces |
| Popis: | The use of acidic ionic liquids and solids as electrolytes in fuel cells is an emerging field due to their efficient proton conductivity and good thermal stability. Despite multiple reports describing conducting properties of acidic ILs, little is known on the charge-transport mechanism in the vicinity of liquid-glass transition and the structural factors governing the proton hopping. To address these issues, we studied two acidic imidazolium-based ILs with the same cation, however, different anions-bulk tosylate vs small methanesulfonate. High-pressure dielectric studies of anhydrous and water-saturated materials performed in the close vicinity of T-g have revealed significant differences in the charge-transport mechanism in these two systems being undetectable at ambient conditions. Thereby, we demonstrated the effect of molecular architecture on proton hopping, being crucial in the potential electrochemical applications of acidic ILs. |
| Databáze: | OpenAIRE |
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