Letteratura scientifica selezionata sul tema "Spatially and temporally resolved electrochemical impedance spectroscopy"
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Articoli di riviste sul tema "Spatially and temporally resolved electrochemical impedance spectroscopy":
Gerteisen, D., W. Mérida, T. Kurz, P. Lupotto, M. Schwager e C. Hebling. "Spatially Resolved Voltage, Current and Electrochemical Impedance Spectroscopy Measurements". Fuel Cells 11, n. 2 (23 marzo 2011): 339–49. http://dx.doi.org/10.1002/fuce.201000181.
Oppek, Philipp, Mischa Geörg, Tobias Goosmann, Tatyana V. Reshetenko, Andre Weber e Ulrike Krewer. "Spatially Resolved Deconvolution of Loss Processes in PEM Fuel Cells". ECS Meeting Abstracts MA2022-01, n. 35 (7 luglio 2022): 1439. http://dx.doi.org/10.1149/ma2022-01351439mtgabs.
Papac, Meagan C., Kevin R. Talley, Ryan O’Hayre e Andriy Zakutayev. "Instrument for spatially resolved, temperature-dependent electrochemical impedance spectroscopy of thin films under locally controlled atmosphere". Review of Scientific Instruments 92, n. 6 (1 giugno 2021): 065105. http://dx.doi.org/10.1063/5.0024875.
Hink, Steffen, e Emil Roduner. "Application of a contact mode AFM for spatially resolved electrochemical impedance spectroscopy measurements of a Nafion membrane electrode assembly". Phys. Chem. Chem. Phys. 15, n. 5 (2013): 1408–16. http://dx.doi.org/10.1039/c2cp42843a.
Schiller, Günter, Erich Gülzow, Mathias Schulze, Norbert Wagner e K. Andreas Friedrich. "Analytical Investigation of Fuel Cells by Using In Situ and Ex Situ Diagnostic Methods". Materials Science Forum 638-642 (gennaio 2010): 1125–30. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.1125.
Goosmann, Tobias, Philipp Oppek e Andre Weber. "Method for Systematic Validation of a Physically Based PEMFC Model By Spatially Resolved Impedance Measurements". ECS Meeting Abstracts MA2023-02, n. 38 (22 dicembre 2023): 1837. http://dx.doi.org/10.1149/ma2023-02381837mtgabs.
Tok, Guelen Ceren, Leonhard Reinschlüssel, Anne Berger e Hubert Andreas Gasteiger. "Spatially Resolved Operando X-Ray Absorption Spectroscopy in NCA/Graphite to Quantify the Potential-Dependent Transition Metal Dissolution and Its Effect on Capacity Fading". ECS Meeting Abstracts MA2022-01, n. 2 (7 luglio 2022): 172. http://dx.doi.org/10.1149/ma2022-012172mtgabs.
Stavola, Alyssa M., Dominick P. Guida, Andrea M. Bruck, Xiao Sun, Hongli Zhu e Joshua W. Gallaway. "Operando Measurement of Lithiation Gradients in NMC111-Argyrodite All-Solid-State Composite Cathodes". ECS Meeting Abstracts MA2023-01, n. 6 (28 agosto 2023): 1066. http://dx.doi.org/10.1149/ma2023-0161066mtgabs.
Koprek, Miriam, Robert Schlumberger, Christian Wachtel, Florian Wilhelm, Joachim Scholta e Markus Hölzle. "Development and Evaluation of Accelerated Durability Tests Under Realistic Operating Conditions for PEMFC Stacks – a Systematic Approach". ECS Meeting Abstracts MA2023-02, n. 38 (22 dicembre 2023): 1846. http://dx.doi.org/10.1149/ma2023-02381846mtgabs.
Schmitt, Tobias, Rémi Bligny, Gaël Maranzana e Ulrich Sauter. "Rapid and Local EIS on a Segmented Fuel Cell: A New Method for Spatial and Temporal Resolution". Journal of The Electrochemical Society, 8 settembre 2022. http://dx.doi.org/10.1149/1945-7111/ac9089.
Tesi sul tema "Spatially and temporally resolved electrochemical impedance spectroscopy":
Schmitt, Tobias. "Method development and experimental investigation of dynamic water distribution in a segmented PEMFC". Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0021.
Proton exchange membrane fuel cells (PEMFCs) represent a promising technology as an electric powertrain in automotive application that becomes increasingly superior to the internal combustion engine. Over the past years, the deconvolution of internal processes has been studied intensively, leading to an improvement of performances and lifetime while reducing the costs. Yet, many underlying mechanisms are still not fully understood, as the experimental methods are partly limited. Water distribution in a PEMFC plays a pivotal role in its performance and transient response. The experimental study of its influence is challenging and expensive. In addition, there is a lack of experimental methods that can combine spatially and temporally resolved data at a scale that allows investigation of impacts at the industrial cell or stack level.This work focuses on developing methods that can provide insight into spatially and temporally resolved influences of water distribution on the performance of PEMFCs and their investigation. Therefore, a highly instrumented and segmented PEMFC with straight parallel channels in combination with a self-developed control system is installed. The flexibility of the self-developed control system allows to establish a local electrochemical impedance spectroscopy (Lo EIS) measurement along the channel. In addition, a parametrization workflow is established, that links humidity sensitive resistances to temperature and applied relative humidity. These resistances, spatially resolved by Lo EIS, can then be transferred into a equivalent local humidity to study the humidity distribution along the channel and its effect on steady-state performances.In order to investigate not only steady-state but also transient conditions, Lo-EIS is further developed into the rapid and local EIS method (RaLo-EIS). The RaLo EIS acquires spectra within a reduced range of frequencies (10 kHz→20 Hz) for all 20 segments of the cell within 1 second. Such spatially and temporally resolved impedance data are a novelty for PEMFC and offer new insights into the transient behavior of PEMFCs. With RaLo EIS transient experiments are conducted, showing the inhomogeneity of the response of a PEMFC. It further reveals how much information is lost, if only globally averaged data is acquired.Since the use of humidity sensitive resistors that need to be fitted is challenging for the parameterized calculation of local humidity, fixed frequency impedances are used for this purpose. To prove the independence of fixed frequency a robust comparison of the resulting relative humidity based on multiple frequencies is conducted. The comparison shows that the resulting equivalent humidity is almost independent of the chosen frequency.To further speed up the acquisition rate of RaLo EIS, a speed optimized version, the rapid and local fixed frequency (RaLoff) EIS is developed to acquire temporally high resolved data. This method is then used to investigate and characterize the transient response of PEMFC to sudden changes in its conditions. A qualitative model is developed, that explains the resulting behavior in terms of performance and humidity distribution. A characterization method for transient responses is created, that can be used to reduce the complexity of such processes, making it possible to compare different materials in terms of their transient behavior.In the end a new approach for a transmission line model (TLM) is developed, as the established ones from literature are incapable of properly fitting experimental data for some cases. This new TLM is based on not yet validated assumptions but provides excellent matches with experimental data