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Measuring and modeling mass transport losses in proton exchange membrane water electrolyzers using electrochemical impedance spectroscopy

Garcia-Navarro, Julio Cesar and Schulze, Mathias and Friedrich, Kaspar Andreas (2019) Measuring and modeling mass transport losses in proton exchange membrane water electrolyzers using electrochemical impedance spectroscopy. Journal of Power Sources, 431, pp. 189-204. Elsevier. doi: 10.1016/j.jpowsour.2019.05.027. ISSN 0378-7753.

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Abstract

PEM electrolysis has gained a lot of attention in recent years due to its ability to produce clean, sustainable hydrogen. One of the crucial steps toward optimizing hydrogen production is understanding the role of operating conditions on performance; in particular, understanding mass transport effects is crucial for optimizing the operation of a PEM electrolyzer. In this article we measured and modeled mass transport losses in a single-cell PEM electrolyzer, as a function of pressure and water flow, using EIS. We found that pressure and water flow cause larger mass transport losses on the cathode. Moreover, we measured a more considerable effect with pressure than with water flow, which we interpret as a consequence of pressure-dependent bubble detachment sizes and an increase in the diffusion path for bubble nucleation. Furthermore, we found a dependence of the mass transport overpotential on different MEA design parameters, such as electrode thickness.

Item URL in elib:https://elib.dlr.de/133204/
Document Type:Article
Title:Measuring and modeling mass transport losses in proton exchange membrane water electrolyzers using electrochemical impedance spectroscopy
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Garcia-Navarro, Julio CesarJulio.GarciaNavarro (at) dlr.deUNSPECIFIED
Schulze, MathiasMathias.Schulze (at) dlr.deUNSPECIFIED
Friedrich, Kaspar AndreasAndreas.Friedrich (at) dlr.dehttps://orcid.org/0000-0002-2968-5029
Date:2019
Journal or Publication Title:Journal of Power Sources
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:431
DOI :10.1016/j.jpowsour.2019.05.027
Page Range:pp. 189-204
Publisher:Elsevier
ISSN:0378-7753
Status:Published
Keywords:PEM electrolysis Mass transport losses Impedance spectroscopy Hydrogen production Electrolysis
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Electrolysis and Hydrogen
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Elektrochemical Processes (Electrolysis) (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Friedrich, Prof.Dr. Kaspar Andreas
Deposited On:07 Jan 2020 12:55
Last Modified:07 Jan 2020 12:55

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