On the Operational Conditions’ Effect on the Performance of an Anion Exchange Membrane Water Electrolyzer: Electrochemical Impedance Spectroscopy Study

Pushkareva, I. V.; Solovyev, Maksim A.; Butrim, Sergey I.; Kozlova, M. V.; Simkin, Dmitri A.; Pushkarev, Artem S.

doi:10.3390/membranes13020192

Cited by 19 publications

(6 citation statements)

References 68 publications

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“…Furthermore, the frequency at which the low-frequency inductive behavior starts is very similar. Setups 3 and 4 show high-frequency inductance due to their wiringhere we refer to various publications for a more detailed understanding [28,33,34]. However, there are differences in the low-frequency region in the spectra of setup 3.…”

Section: Resultsmentioning

confidence: 98%

On the Role of Inductive Loops at Low Frequencies in Pem Electrolysis

Hensle,

Brinker,

Metz

et al. 2023

Preprint

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Section: Resultsmentioning

confidence: 98%

On the Role of Inductive Loops at Low Frequencies in Pem Electrolysis

Hensle,

Brinker,

Metz

et al. 2023

Preprint

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“…[9] Since these parasitic effects could not be avoided, an ECM has to be used to assess them. There are a different ways to model the inductive stray impedance: 1) a simple pure inductance (in Figure 3 model R-L), [31] 2) pure inductance in parallel with a resistance, [13,37] and 3) a modified inductance (in Figure 3 model R-L α ). [35,38] After assessing all the mentioned models, the one, which describes the results with the highest accuracy, which means least χ 2 , is a modified inductive reactance (L α ) in series to a resistance (R ohm ), see the ECM in Figure 2.…”

Section: Sc Measurements and Ecm Fittingmentioning

confidence: 99%

“…Recently the peak frequencies (or characteristic frequencies) were proposed to identify and characterize the processes occurring in electrochemical devices including water electrolysis MEA. [37,45,48] Peak-frequency analysis was, therefore, evaluated in case of inclusion (darker color) or not (lighter color) of the inductance and plotted for each R//CPE group in Figure 10. It is evident that the two approaches never provide corresponding results.…”

Section: Ecm Fitting Of In Situ Eis Measurementsmentioning

confidence: 99%

Parasitic Effects in Impedance Spectrum of PEM Water Electrolysis Cells: Case Study of High‐Frequency Inductive Effects

Franzetti,

Pushkarev,

Chan

et al. 2023

Energy Tech

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Electrochemical impedance spectroscopy (EIS) is a powerful tool to characterize and distinguish electrochemical, electrical, and diffusive processes in an electrolysis cell. The EIS response with small impedance (mΩ) depends on components and materials of the cell, but often also on the electrical setup, cables, and connectors, leading to incorrect conclusions about the performance of the electrolysis cells. These parasitic effects are assessed via a short‐circuit measurement and confirmed to be external from the membrane electrode assembly (MEA). In the setup, the inductive characteristic is described by a modified inductive reactance and must be included in the equivalent circuit model (ECM) which is fitting the cell EIS spectra in operation (in situ). If points of the spectra showing inductive characteristic (below x‐axis in Nyquist plot) are excluded from the ECM evaluation, an artificially increased ohmic resistance at high frequencies is obtained. In addition, considerations on other components of the ECM can be misleading and significantly incorrect. The only way to avoid that inductive behavior caused by the external setup is incorrectly assigned to the ECM describing properties of the MEA is to include the inductive effects in the ECM analysis of in situ EIS measurements.

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“…Quaternary ammonium AEMs were reported in one study [ 13 ] to be more effective in diffusion dialysis, with a thin membrane being the most effective. However, their chemical stability and conductivity were still of great concern, which appears to be a major challenge for the development of AEM-based energy systems [ 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Anion-Exchange Membrane “Polikon A” Based on Polyester Fiber Fabric (Functionalized by Low-Temperature High-Frequency Plasma) with Oxidized Metal Nanoparticles

Terin,

Kardash,

Ainetdinov

et al. 2023

Membranes

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An experimental laboratory set of samples of composite heterogeneous anion-exchange membranes was obtained by us for the development of our original method of polycondensation filling. Anion-exchange membranes were prepared on plasma-treated and non-plasma-treated polyester fiber fabrics. The fabric was treated with low-temperature argon plasma at a power of 400 W for 10 min at a pressure of 5 × 10−5 mbar. On the surface and bulk of the polyester fiber, a polyfunctional anionite of mixed basicity was synthesized and formed. The anion-exchange membrane contained secondary and tertiary amino groups and quaternary ammonium groups, which were obtained from polyethylene polyamines and epichlorohydrins. At the stage of the chemical synthesis of the anion matrix, oxidized nanoparticles (~1.5 wt.%) of silicon, nickel, and iron were added to the monomerization composition. The use of ion-plasma processing of fibers in combination with the introduction of oxidized nanoparticles at the synthesis stage makes it possible to influence the speed and depth of the synthesis and curing processes; this changes the formation of the surface morphology and the internal structure of the ion-exchange polymer matrix, as well as the hydrophobic/hydrophilic balance and—as a result—the different operational characteristics of anion-exchange membranes.

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On the Operational Conditions’ Effect on the Performance of an Anion Exchange Membrane Water Electrolyzer: Electrochemical Impedance Spectroscopy Study

Cited by 19 publications

References 68 publications

On the Role of Inductive Loops at Low Frequencies in Pem Electrolysis

On the Role of Inductive Loops at Low Frequencies in Pem Electrolysis

Parasitic Effects in Impedance Spectrum of PEM Water Electrolysis Cells: Case Study of High‐Frequency Inductive Effects

Anion-Exchange Membrane “Polikon A” Based on Polyester Fiber Fabric (Functionalized by Low-Temperature High-Frequency Plasma) with Oxidized Metal Nanoparticles

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