A Review of Accelerated Stress Tests for Enhancing MEA Durability in PEM Water Electrolysis Cells

Kuhnert, Eveline; Hacker, Viktor; Bodner, Merit

doi:10.1155/2023/3183108

Cited by 25 publications

(12 citation statements)

References 136 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Membrane thinning as a result of a radical attack is widely known and has been reported by several researchers before [ 10 , 19 , 21 , 41 , 42 , 43 , 44 ]. According to Kusoglu et Weber [ 10 ], the chemical and mechanical degradation of PFSA membranes is inextricably linked and dependent on operation and dominant stressors.…”

Section: Resultsmentioning

confidence: 99%

Analysis of PEM Water Electrolyzer Failure Due to Induced Hydrogen Crossover in Catalyst-Coated PFSA Membranes

Kuhnert

Heidinger

Sandu³

et al. 2023

Membranes

Self Cite

View full text Add to dashboard Cite

Polymer electrolyte membrane water electrolysis (PEMWE) is a leading candidate for the development of a sustainable hydrogen infrastructure. The heart of a PEMWE cell is represented by the membrane electrode assembly (MEA), which consists of a polymer electrolyte membrane (PEM) with catalyst layers (CLs), flow fields, and bipolar plates (BPPs). The weakest component of the system is the PEM, as it is prone to chemical and mechanical degradation. Membrane chemical degradation is associated with the formation of hydrogen peroxide due to the crossover of product gases (H2 and O2). In this paper, membrane failure due to H2 crossover was addressed in a membrane-focused accelerated stress test (AST). Asymmetric H2O and gas supply were applied to a test cell in OCV mode at two temperatures (60 °C and 80 °C). Electrochemical characterization at the beginning and at the end of testing revealed a 1.6-fold higher increase in the high-frequency resistance (HFR) at 80 °C. The hydrogen crossover was measured with a micro-GC, and the fluoride emission rate (FER) was monitored during the ASTs. A direct correlation between the FER and H2 crossover was identified, and accelerated membrane degradation at higher temperatures was detected.

show abstract

Section: Resultsmentioning

confidence: 99%

Analysis of PEM Water Electrolyzer Failure Due to Induced Hydrogen Crossover in Catalyst-Coated PFSA Membranes

Kuhnert

Heidinger

Sandu³

et al. 2023

Membranes

Self Cite

View full text Add to dashboard Cite

show abstract

“…While the boundary layer also becomes thinner at 50−70 °C, it causes catalyst shedding which can be confirmed by the ECSA results. However, excessive electrolyte flow rate and elevated temperatures can decrease the physical stability of the GDE, 80 affecting the capillary action within the GDE and causing a decline in the PEMEC performance. 65 Therefore, 40 °C is the optimal temperature and the parallel grid flow path is suitable for achieving the best PEMEC performance.…”

Section: Resultsmentioning

confidence: 99%

Effect of Flow Channel Shape and Operating Temperature on the Performance of a Proton Exchange Membrane Electrolyzer Cell

2023

View full text Add to dashboard Cite

Proton exchange membrane electrolyzer cells (PEMECs) are considered to be an environmentally friendly system for producing high-purity hydrogen through water electrolysis. However, they require optimal configurations and operating conditions for energy and costeffective practical applications. In this study, four different types of flow paths inside a PEMEC were proposed, namely, parallel, single-channel, four-channel, and parallel grid, and the effect of the flow path shape inside the PEMEC on hydrogen evolution reaction was examined. In addition, the optimal operating temperature was determined via electrochemical experiments. The experimental results reveal that the parallel grid flow field yielded the highest current density of 118.04 mA/cm 2 and hydrogen production at a volume flow rate of 6.6 mL/min owing to a relatively higher electrochemical surface area of 1.11657 cm 2 at the optimum operating temperature of 40 °C compared with other flow fields. Computational fluid dynamics analysis results confirmed that at 40 °C the parallel grid flow field has an advantageous path shape for electrolyte distribution inside the PEMEC, and consequently, the appropriate flow rate facilitates the transport of reactants and products. The findings of this study can be used as a reference for PEMEC research in terms of the selection of a suitable flow field geometry and temperature for PEMECs operating under different conditions.

show abstract

“…Overpotentials typically increase as a result of deactivation. 47 A so-called activation step, as encountered for noble metals 48,49 or MEAs, 50,51 was not observed in the majority of the tested samples. A follow-up investigation on this irregular phenomenon will be present towards the end of this study.…”

Section: Simulated Optimization Of Composition Through Mobomentioning

confidence: 90%

Navigating the unknown with AI: multiobjective Bayesian optimization of non-noble acidic OER catalysts

Jenewein,

Torresi,

Haghmoradi

et al. 2024

J. Mater. Chem. A

View full text Add to dashboard Cite

show abstract

A Review of Accelerated Stress Tests for Enhancing MEA Durability in PEM Water Electrolysis Cells

Cited by 25 publications

References 136 publications

Analysis of PEM Water Electrolyzer Failure Due to Induced Hydrogen Crossover in Catalyst-Coated PFSA Membranes

Analysis of PEM Water Electrolyzer Failure Due to Induced Hydrogen Crossover in Catalyst-Coated PFSA Membranes

Effect of Flow Channel Shape and Operating Temperature on the Performance of a Proton Exchange Membrane Electrolyzer Cell

Navigating the unknown with AI: multiobjective Bayesian optimization of non-noble acidic OER catalysts

Contact Info

Product

Resources

About