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| Home > Publications database > Supercapacitors with Aqueous Electrolytes: What Can We Learn from In-Situ and Operando Synchrotron and Neutron Techniques? > print |
| Home > Publications database > Supercapacitors with Aqueous Electrolytes: What Can We Learn from In-Situ and Operando Synchrotron and Neutron Techniques? > print |
| 001 | 630678 | ||
| 005 | 20250626211013.0 | ||
| 037 | _ | _ | |a PUBDB-2025-01898 |
| 041 | _ | _ | |a English |
| 100 | 1 | _ | |a Seyffertitz, Malina |0 P:(DE-H253)PIP1085383 |b 0 |e Corresponding author |g female |
| 245 | _ | _ | |a Supercapacitors with Aqueous Electrolytes: What Can We Learn from In-Situ and Operando Synchrotron and Neutron Techniques? |f 2021-04-01 - 2025-05-26 |
| 260 | _ | _ | |c 2025 |
| 300 | _ | _ | |a 217 |
| 336 | 7 | _ | |a Output Types/Dissertation |2 DataCite |
| 336 | 7 | _ | |a DISSERTATION |2 ORCID |
| 336 | 7 | _ | |a PHDTHESIS |2 BibTeX |
| 336 | 7 | _ | |a Thesis |0 2 |2 EndNote |
| 336 | 7 | _ | |a Dissertation / PhD Thesis |b phd |m phd |0 PUB:(DE-HGF)11 |s 1750935958_1076324 |2 PUB:(DE-HGF) |
| 336 | 7 | _ | |a doctoralThesis |2 DRIVER |
| 502 | _ | _ | |a Dissertation, Montanuniversität Leoben, 2025 |c Montanuniversität Leoben |b Dissertation |d 2025 |o 2025-05-26 |
| 520 | _ | _ | |a This thesis investigates the fundamental processes governing supercapacitors with aqueous electrolytes through the development and application of in-situ and operando synchrotronand neutron techniques. Using a suite of complementary methods, including X-ray Transmission (XRT), X-ray Fluorescence (XRF), (Anomalous) Small-Angle X-ray Scattering ((A)SAXS), Small-Angle Neutron Scattering (SANS), X-ray Diffraction (XRD), and Neutron Diffraction (ND), a detailed experimental framework is established to probe supercapacitor behaviour under working conditions. The work focuses on experimentally accessing and interpreting the following aspects of supercapacitor operation: (1) ion and solvent concentration changes and charge-balancing mechanisms, (2) structural changes in the electrode during operation, (3) wetting effects, (4) local ion and solvent (re-)arrangement, (5) charging dynamics, (6) atomic-scale interactions via pair distribution functions, and (7) the influence of electrode geometry and cell design. These phenomena are explored in detail for two electrochemical systems: MSP-20X activated carbon electrodes with 1 M RbBr (aq.) electrolyte, and Ni3(HITP)2 conductive metal-organic framework electrodes with 1 M NaTFSI (aq.) electrolyte. For both, tailored experimentalapproaches are developed and critically assessed. While this thesis provides a practical framework for applying in-situ and operando synchrotron and neutron techniques to electrochemical systems, its central contribution lies in the insights it offers into electric double-layer formation and ion and solvent behavior in supercapacitors under operating conditions. By revealing how a range of interconnected processes unfold during charging and discharging, these findings offer a comprehensive and nuanced understanding of how supercapacitors function and how their performance might be more effectively tailored in the future. |
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