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Journal articles on the topic 'Spatially and temporally resolved electrochemical impedance spectroscopy'

Author: Grafiati

Published: 8 June 2024

Last updated: 31 July 2025

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1

Gerteisen, D., W. Mérida, T. Kurz, P. Lupotto, M. Schwager, and C. Hebling. "Spatially Resolved Voltage, Current and Electrochemical Impedance Spectroscopy Measurements." Fuel Cells 11, no. 2 (2011): 339–49. http://dx.doi.org/10.1002/fuce.201000181.

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2

Oppek, Philipp, Mischa Geörg, Tobias Goosmann, Tatyana V. Reshetenko, Andre Weber, and Ulrike Krewer. "Spatially Resolved Deconvolution of Loss Processes in PEM Fuel Cells." ECS Meeting Abstracts MA2022-01, no. 35 (2022): 1439. http://dx.doi.org/10.1149/ma2022-01351439mtgabs.

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The complex operating behaviour of PEM Fuel Cells is heavily influenced by different non-linear loss processes, which limit the cell performance. Depending on the operating conditions, the different losses change in magnitude and characteristic time constants [1]. During technical operation of large-sized PEM Fuel Cells, gradients in operating conditions occur along the gas channels, resulting in an inhomogeneous current density distribution. This is caused by the locally varying electrochemical activity due to in-plane gradients in concentrations of reactants and reaction products, gas pressu

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3

Curnick, Oliver, Mehran Afra, Alexander Thirkell, et al. "Spatially-Resolved Characterisation of Large-Format PEMFC Electrodes: Electrochemical Impedance, ECSA and O₂ Concentration." ECS Meeting Abstracts MA2024-02, no. 44 (2024): 3064. https://doi.org/10.1149/ma2024-02443064mtgabs.

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Fuel cell stacks are growing: both in numbers deployed in the field but also in terms of active electrode areas. The pursuit of higher-power applications and power densities means that cell active areas upwards of 400cm² are now commonplace. With larger electrodes comes an increased risk of non-uniform distributions of current density, temperature and reactant concentrations, which may lead in turn to locally-accelerated degradation and premature failure. Whilst detailed CFD/FEA modelling and simulation can help to refine designs, direct observations via in-situ and in-operando measurements ar

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4

Papac, Meagan C., Kevin R. Talley, Ryan O’Hayre, and Andriy Zakutayev. "Instrument for spatially resolved, temperature-dependent electrochemical impedance spectroscopy of thin films under locally controlled atmosphere." Review of Scientific Instruments 92, no. 6 (2021): 065105. http://dx.doi.org/10.1063/5.0024875.

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5

Hink, Steffen, and 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, no. 5 (2013): 1408–16. http://dx.doi.org/10.1039/c2cp42843a.

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6

Schiller, Günter, Erich Gülzow, Mathias Schulze, Norbert Wagner, and K. Andreas Friedrich. "Analytical Investigation of Fuel Cells by Using In Situ and Ex Situ Diagnostic Methods." Materials Science Forum 638-642 (January 2010): 1125–30. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.1125.

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The study of the behaviour of fuel cells by using various in-situ and ex-situ diagnostic methods is a main topic at the German Aerospace Center (DLR). The degradation of cell components of polymer electrolyte fuel cells (PEFC, DMFC) and of solid oxide fuel cells (SOFC) are of special interest. For this purpose physical and electrochemical methods are used individually as well as in combination. In addition to routinely applied electrochemical methods different methods for locally resolved current density measurements by means of segmented cell technology and integrated temperature sensors have

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7

Tok, Guelen Ceren, Leonhard Reinschlüssel, Anne Berger, and 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, no. 2 (2022): 172. http://dx.doi.org/10.1149/ma2022-012172mtgabs.

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Layered transition metal oxides like NCAs (LiNixCoyAlzO2, with x+y+z=1) and NCMs (LiNixCoyMnzO2, with x+y+z=1) are used as cathode active materials (CAMs) for high energy Li-ion batteries due to their high capacity. However, at high upper cut-off potentials, those CAMs suffer from structural instabilities, resulting in severe capacity fading and thus limiting the accessible capacity that can be obtained. Possible causes for the capacity fade at high cut-off potentials and high state-of-charge (SOC) include the (electro)chemical oxidation of the electrolyte oxidation and transition metal (TM) d

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8

Goosmann, Tobias, Philipp Oppek, and Andre Weber. "Method for Systematic Validation of a Physically Based PEMFC Model By Spatially Resolved Impedance Measurements." ECS Meeting Abstracts MA2023-02, no. 38 (2023): 1837. http://dx.doi.org/10.1149/ma2023-02381837mtgabs.

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Loss mechanisms in PEM Fuel Cells related to charge transfer reactions or diffusive gas transport result in a strongly nonlinear performance, which is furthermore affected by operating conditions as temperature, relative humidity of the gases and stoichiometries. These dependencies have to be considered and validated in fuel cell models to ensure accuracy. Thus, the interpretation of the simulated results becomes more reliable. Direct comparison of simulated and measured current/voltage-relation only allows to evaluate deviations in resulting cell voltages but exclude internal state variables

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9

Oswald, Stefan, Alice J. Merryweather, Christoph Schnedermann, Akshay Rao, and Clare P. Grey. "Operando Optical Monitoring of the Dynamics and Inhomogeneity of the Electrical Double Layer on Single Particles." ECS Meeting Abstracts MA2025-01, no. 1 (2025): 78. https://doi.org/10.1149/ma2025-01178mtgabs.

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The electrical double layer (EDL) forms at the electrified interface of a solid electrode immersed into a liquid electrolyte and is composed of electronic charge carriers, solvated ions, and solvent molecules [1]. Its properties govern the mass and charge transfer through the interface itself, thus critical to the operation of any electrochemical system. However, a full description for these systems is still lacking since the direct characterization of the EDL is extremely challenging, mostly due to its nanoscopic scale and high rearrangement rates. Here, we present a novel laboratory-based op

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10

Schüttoff, Miriam, Christian Wachtel, Florian Wilhelm, Joachim Scholta, and Markus Hölzle. "Improved Understanding of PEMFC Stack Durability Testing through Comprehensive In-Situ and Ex-Situ Characterization Techniques." ECS Transactions 114, no. 5 (2024): 655–69. http://dx.doi.org/10.1149/11405.0655ecst.

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Durability testing of Proton Exchange Membrane Fuel Cells for mobile applications remains a critical challenge. While most academic studies focus on single-cell testing, there are only few publications on stack testing of technical relevant sizes. This study utilizes comprehensive characterization techniques to enhance understanding of PEMFC stack durability, aiming to meet the currently targeted durability targets. A 5,500-hour long-term test, based on the Auto Stack Industry (ASI) test protocol, was performed on a 7-cell short stack of 240 cm² active area. In-situ techniques, such as spatial

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11

Schüttoff, Miriam, Christian Wachtel, Florian Wilhelm, Joachim Scholta, and Markus Hölzle. "Improved Understanding of PEMFC Stack Durability Testing through Comprehensive In-Situ and Ex-Situ Characterization Techniques." ECS Transactions 114, no. 5 (2024): 641–55. http://dx.doi.org/10.1149/11405.0641ecst.

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Durability testing of Proton Exchange Membrane Fuel Cells for mobile applications remains a critical challenge. While most academic studies focus on single-cell testing, there are only few publications on stack testing of technical relevant sizes. This study utilizes comprehensive characterization techniques to enhance understanding of PEMFC stack durability, aiming to meet the currently targeted durability targets. A 5,500-hour long-term test, based on the Auto Stack Industry (ASI) test protocol, was performed on a 7-cell short stack of 240 cm² active area. In-situ techniques, such as spatial

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12

Stavola, Alyssa M., Dominick P. Guida, Andrea M. Bruck, Xiao Sun, Hongli Zhu, and Joshua W. Gallaway. "Operando Measurement of Lithiation Gradients in NMC111-Argyrodite All-Solid-State Composite Cathodes." ECS Meeting Abstracts MA2023-01, no. 6 (2023): 1066. http://dx.doi.org/10.1149/ma2023-0161066mtgabs.

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Achieving the high energy density targets in all-solid-state batteries (ASSBs) will require thick cathodes optimized for full utilization of active material. In composite cathodes with sulfide SSEs, the exclusion of carbon additives makes cathode design to balance ionic and electronic conductivities all the more important. Li-Ni1/3Mn1/3Co1/3O2 (NMC111) is a widely studied cathode material for its high energy density and high working voltage. The lattice parameters of this well-studied structure directly correlate to the amount of Li in the material, allowing for very accurate measurements of l

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13

Koprek, Miriam, Robert Schlumberger, Christian Wachtel, Florian Wilhelm, Joachim Scholta, and Markus Hölzle. "Development and Evaluation of Accelerated Durability Tests Under Realistic Operating Conditions for PEMFC Stacks – a Systematic Approach." ECS Meeting Abstracts MA2023-02, no. 38 (2023): 1846. http://dx.doi.org/10.1149/ma2023-02381846mtgabs.

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Over the last decade, significant progress has been achieved in the commercialization of Polymer Electrolyte Membrane (PEM) fuel cells for mobile applications. However, long-term durability and stability of such systems still needs further improvement. To overcome today’s time-consuming long-term durability tests, the development of so-called accelerated durability tests (ADT) is urgently necessary. In this work, we present our recent results on such ADT test-protocols based on research promoting a detailed understanding of the individual aging mechanisms in PEM fuel cells. Various stressors h

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14

Gerbig, Felix, Frank Schäfer, Michael Holzapfel, and Hermann Nirschl. "Optimizing Mid-Temperature Sodium Iodine Batteries for Sustainable Large-Scale Energy Storage: A Comprehensive Modeling Approach and Experimental Validation." ECS Meeting Abstracts MA2024-01, no. 3 (2024): 617. http://dx.doi.org/10.1149/ma2024-013617mtgabs.

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The need for safe, eco-friendly, low-cost batteries for large scale implementation rises in the presence of the expansions of renewable energy sources. High-temperature liquid sodium batteries (e.g. sodium-sulfur) are a well-established technology for large-scale grid storage. Combining the molten sodium anode with an aqueous iodine cathode overcomes the problems of thermal loses and sealing by reducing the operating temperature to about 100°C. This leads to higher cost efficiency, energy density and a simplified cell design. Here we present a novel modelling approach for complex carbon-based

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15

Schüttoff, Miriam, Christian Wachtel, Florian Wilhelm, Joachim Scholta, and Markus Hölzle. "Improved Understanding of PEMFC Stack Durability Testing through Comprehensive In-Situ and Ex-Situ Characterization Techniques." ECS Meeting Abstracts MA2024-02, no. 46 (2024): 3262. https://doi.org/10.1149/ma2024-02463262mtgabs.

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The pursuit of durable Proton Exchange Membrane Fuel Cells (PEMFC) for mobile applications has seen remarkable progress in the past decade. Despite this progress, ensuring long-term durability of PEMFCs remains a complex challenge. In addition to the development of accelerated test methods that allow a faster assessment of the expected lifetime, the use of in-situ and ex-situ characterization methods is necessary to gain a better understanding of the mechanisms leading to aging processes within fuel cell stacks. By adopting the learnings from such tests, targeted material development can be fo

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16

Schmitt, Tobias, Rémi Bligny, Gaël Maranzana, and Ulrich Sauter. "Rapid and Local EIS on a Segmented Fuel Cell: A New Method for Spatial and Temporal Resolution." Journal of The Electrochemical Society, September 8, 2022. http://dx.doi.org/10.1149/1945-7111/ac9089.

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Abstract A new method for acquiring temporal and spatially resolved electrochemical impedance spectroscopy data on a segmented proton exchange membrane fuel cell is developed. The cell used in this study consists of a segmented anode with 20 galvanically insulated segments. By measuring all segments simultaneously, restricting the frequency range, imposing all frequencies within one measuring task, and decoupling the acquisition and post-processing steps, we can reduce the acquisition time to 1 second. The results yield the spatial and temporal evolution of the TLM’s parameters, e.g., membrane

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17

Bandarenka, Aliaksandr, Felix Haimerl, Jarek P. Sabawa, and Tuan A. Dao. "Spatially Resolved Electrochemical Impedance Spectroscopy of Automotive PEM Fuel Cells." ChemElectroChem, April 13, 2022. http://dx.doi.org/10.1002/celc.202200069.

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18

Taylor, S. R., and A. M. Mierisch. "Incentives for Using LEIM in the Investigation of Corrosion Initiation on Organic Coated Alloys." MRS Proceedings 699 (2001). http://dx.doi.org/10.1557/proc-699-r1.4.

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AbstractLocal electrochemical impedance mapping and spectroscopy (LEIM/S) have become important tools for the investigation of local electrochemical breakdown events associated with the degradation of organically coated metals in aqueous environments. LEIM/S of organic coated metal substrates has revealed local degradation events that are distributed spatially and temporally. These observations provide support to a number of long-standing theories, as well as provide new insight into the damage process. The local changes in impedance observed at early stages of immersion support the presence o

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19

Clark, Raimi, Michael Mounho, William Brooks, Matthew Hopkins, Jacob Stephens, and Andreas Neuber. "Spectroscopic investigation of early light emission from anode-initiated surface flashover in vacuum." Physics of Plasmas 31, no. 3 (2024). http://dx.doi.org/10.1063/5.0190819.

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Time-resolved optical emission spectroscopy is used to explore the early development of anode-initiated flashover in vacuum. An experimental apparatus for collecting flashover self-luminosity is introduced, which enables spatially resolved light collection from regions adjacent to the anode and cathode triple junctions. The emitted light is spectrally and temporally resolved utilizing an imaging spectrograph and a fast electronic shutter camera. The first light detectable from flashovers across both Rexolite and polytetrafluoroethylene (PTFE) insulators begins less than 10 ns prior to the flas

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20

Oehler, Fabian Ferdinand, Andreas Graule, Simon Kücher, et al. "Multi-Reference Electrode Lithium-Ion Pouch Cell Design for Spatially Resolved Half-Cell Potential and Impedance Measurements." Journal of The Electrochemical Society, October 18, 2023. http://dx.doi.org/10.1149/1945-7111/ad048d.

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Abstract Reliable experimental methods for measuring local potentials in lithium-ion battery cells are challenging but vital for a deep understanding of internal processes at the individual electrode level, and to parameterize and validate electrochemical models. Different three-electrode setups and reference electrodes (REs) have been developed in recent years. Some are based on custom laboratory setups or are small, e.g., coin cell sized. This work addresses internal potentials and half-cell impedances in the widely used single-layer pouch cell format and proposes a novel multi-reference ele

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