Tracking Polarization and Passivation in Anion Exchange Membrane Electrolyzers via Current-Dependent Distribution of Relaxation Times of Electrochemical Impedance Spectroscopy

Elisabetta Campedelli; Enrico Squizzato; Marzio Rancan; Christian Durante

doi:10.1039/d6se00452k

January 1, 2026Sustainable Energy & FuelsOpen Access

Tracking Polarization and Passivation in Anion Exchange Membrane Electrolyzers via Current-Dependent Distribution of Relaxation Times of Electrochemical Impedance Spectroscopy

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Key Points

The study aims to investigate polarization and passivation processes in anion exchange membrane electrolyzers to enhance their performance and lifespan.
Utilized electrochemical impedance spectroscopy to measure relaxation times.
Analyzed current-dependent distributions to assess degradation mechanisms.
Conducted experiments under controlled conditions to simulate operational stress.
Identified significant polarization under varying operational currents, impacting efficiency.
Observed specific degradation pathways corresponding to passivation rates in AEM systems.

Implication

Tracks polarization and passivation in AEM electrolyzers, indicating challenges in sustainable hydrogen production.

Abstract

Anion exchange membrane (AEM) electrolyzers are promising for sustainable hydrogen production, however, still suffer from limited lifetime, high degradation rates, and remain a complex system to monitor. In this work,...

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Cite This Study

Campedelli et al. (2026) studied this question.

synapsesocial.com/papers/6a2900886f82f25be989d099 https://doi.org/10.1039/d6se00452k

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Tracking Polarization and Passivation in Anion Exchange Membrane Electrolyzers via Current-Dependent Distribution of Relaxation Times of Electrochemical Impedance Spectroscopy

Key Points

Implication

Abstract

Discussion

Cite This Study

Tracking Polarization and Passivation in Anion Exchange Membrane Electrolyzers via Current-Dependent Distribution of Relaxation Times of Electrochemical Impedance Spectroscopy

Key Points

Implication

Abstract

Discussion

Cite This Study

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