Garcia Sanchez, Daniel and Morawietz, Tobias and Gama da Rocha, Pedro and Hiesgen, Renate and Gazdzicki, Pawel and Friedrich, A.K. (2020) Local impact of load cycling on degradation in polymer electrolyte fuel cells. Applied Energy, 259, p. 114210. Elsevier. doi: 10.1016/j.apenergy.2019.114210. ISSN 0306-2619.
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Abstract
Degradation mechanisms occurring during proton exchange membrane fuel cells (PEMFC) operation critically depend on the applied electrical load profile. In this work, durability tests were performed using different load cycling ranges. The tests include refresh procedures in order to recover temporary performance losses. Operando current density distribution measurements as well as electrochemical characterization techniques were applied to obtain essential data for understanding degradation behavior of the components of the membrane electrode assembly (MEA). The analysis is supported by scanning electron microscopy (SEM) and energy dispersive x-ray diffraction (EDX) analysis of MEA components. Dynamic load cycling has proven to lead to lower performance losses as compared to constant load operation. Moreover, reversible performance losses were associated with an increased heterogeneity of the current density distribution along the flow field. Thereby, areas with high local current density exhibit particularly strong Pt band formation in the membrane linked with a thinning of the cathode catalyst layer.
Item URL in elib: | https://elib.dlr.de/135713/ | ||||||||||||||||||||||||||||
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Document Type: | Article | ||||||||||||||||||||||||||||
Title: | Local impact of load cycling on degradation in polymer electrolyte fuel cells | ||||||||||||||||||||||||||||
Authors: |
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Date: | 2020 | ||||||||||||||||||||||||||||
Journal or Publication Title: | Applied Energy | ||||||||||||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||||||||||||
Open Access: | Yes | ||||||||||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||||||||||
In SCOPUS: | Yes | ||||||||||||||||||||||||||||
In ISI Web of Science: | Yes | ||||||||||||||||||||||||||||
Volume: | 259 | ||||||||||||||||||||||||||||
DOI: | 10.1016/j.apenergy.2019.114210 | ||||||||||||||||||||||||||||
Page Range: | p. 114210 | ||||||||||||||||||||||||||||
Publisher: | Elsevier | ||||||||||||||||||||||||||||
ISSN: | 0306-2619 | ||||||||||||||||||||||||||||
Status: | Published | ||||||||||||||||||||||||||||
Keywords: | Polymer electrolyte membrane fuel cell Automotive Dynamic load cycling Local degradation Pt band | ||||||||||||||||||||||||||||
HGF - Research field: | Energy | ||||||||||||||||||||||||||||
HGF - Program: | Storage and Cross-linked Infrastructures | ||||||||||||||||||||||||||||
HGF - Program Themes: | Fuel cells | ||||||||||||||||||||||||||||
DLR - Research area: | Energy | ||||||||||||||||||||||||||||
DLR - Program: | E SP - Energy Storage | ||||||||||||||||||||||||||||
DLR - Research theme (Project): | E - Electrochemical Processes (Fuel Cells) (old) | ||||||||||||||||||||||||||||
Location: | Stuttgart | ||||||||||||||||||||||||||||
Institutes and Institutions: | Institute of Engineering Thermodynamics > Electrochemical Energy Technology | ||||||||||||||||||||||||||||
Deposited By: | Garcia Sanchez, Dr Daniel | ||||||||||||||||||||||||||||
Deposited On: | 14 Aug 2020 12:16 | ||||||||||||||||||||||||||||
Last Modified: | 23 Oct 2023 13:14 |
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