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A Novel Accelerated Stress Test for a Representative Enhancement of Cathode Degradation in Direct Methanol Fuel Cells

Rabissi, Claudio and Zago, Matteo and Bresciani, Fausto and Gazdzicki, Pawel and Casalegno, Andrea (2023) A Novel Accelerated Stress Test for a Representative Enhancement of Cathode Degradation in Direct Methanol Fuel Cells. Energies, 16, p. 3226. Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/en16073226. ISSN 1996-1073.

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Official URL: https://www.mdpi.com/1996-1073/16/7/3226


Performance decay of direct methanol fuel cells hinders technology competitiveness. The cathode electrochemical surface area loss is known to be a major reason for performance loss and it is mainly affected by cathode potential and dynamics, locally influenced by water and methanol crossover. To mitigate such phenomenon, novel materials and components need to be developed and intensively tested in relevant operating conditions. Thus, the development of representative accelerated stress tests is crucial to reduce the necessary testing time to assess material stability. In the literature, the most diffused accelerated stress tests commonly enhance a specific degradation mechanism, each resulting in limited representativeness of the complex combination and interaction of mechanisms involved during real-life operation. This work proposes a novel accelerated stress test procedure permitting a quantifiable and predictable acceleration of cathode degradation, with the goal of being representative of the real device operation. The results obtained with a 200 h accelerated stress test are validated by comparing both in situ and post mortem measurements with those performed during a 1100 h operational test, demonstrating an acceleration factor equal to 6.25x and confirming the development of consistent cathode degradation.

Item URL in elib:https://elib.dlr.de/194598/
Document Type:Article
Title:A Novel Accelerated Stress Test for a Representative Enhancement of Cathode Degradation in Direct Methanol Fuel Cells
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Rabissi, ClaudioPolitecnico di MilanoUNSPECIFIEDUNSPECIFIED
Zago, MatteoPolitecnico di MilanoUNSPECIFIEDUNSPECIFIED
Bresciani, FaustoPolitecnico di MilanoUNSPECIFIEDUNSPECIFIED
Gazdzicki, PawelUNSPECIFIEDhttps://orcid.org/0000-0002-5728-7861UNSPECIFIED
Casalegno, AndreaPolitecnico di MilanoUNSPECIFIEDUNSPECIFIED
Date:3 April 2023
Journal or Publication Title:Energies
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
Page Range:p. 3226
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
Keywords:accelerated stress test; degradation; direct methanol fuel cell; electrochemical active area loss; electrochemical impedance spectroscopy
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:Electrochemical Energy Storage
DLR - Research area:Energy
DLR - Program:E VS - Combustion Systems
DLR - Research theme (Project):E - Materials for Electrochemical Energy Storage
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Gazdzicki, Dr. Pawel
Deposited On:06 Apr 2023 14:55
Last Modified:06 Apr 2023 14:55

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