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

Irina V Pushkareva; Maksim A Solovyev; Sergey I Butrim; Margarita V Kozlova; Dmitri A Simkin; Artem S Pushkarev

doi:10.3390/membranes13020192

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

Membranes (Basel). 2023 Feb 3;13(2):192. doi: 10.3390/membranes13020192.

Authors

Irina V Pushkareva^{1

2}, Maksim A Solovyev^{1

2}, Sergey I Butrim^{1

2}, Margarita V Kozlova^{1

2}, Dmitri A Simkin¹, Artem S Pushkarev^{1

2}

Affiliations

¹ National Research Center "Kurchatov Institute", 1 Kurchatov sq., Moscow 123182, Russia.
² Department of Chemistry and Electrochemical Energy, National Research University "Moscow Power Engineering Institute", 14 Krasnokazarmennaya str., Moscow 111250, Russia.

Abstract

The performance of an anion exchange membrane water electrolyzer under various operational conditions (including voltage, KOH-supporting electrolyte concentration, and flow rate) is studied using conventional time-domain technics and electrochemical impedance spectroscopy (EIS). The water electrolyzer EIS footprint, depending on the variation in operational conditions, is studied and discussed, providing valuable data on the faradaic and non-faradaic processes in MEA, considering their contribution to the total polarization resistance. The distribution of the AEMWE cell voltage contributions is valuable to accessing the key directions in the system performance improvement.

Keywords: anion exchange membrane; electrochemical impedance spectroscopy; operation conditions; stray impedance; supporting electrolyte; water electrolysis.

Grants and funding

A.S.P. was financially supported by the Grant of the President of the Russian Federation (project MK-407.2021.1.3) (EIS data analysis). I.V.P. was financially supported by the Grant of the President of the Russian Federation (project MK-4476.2022.1.3) (AEM water electrolyzer fabrication and study).