Visualization, understanding, and mitigation of process-induced-membrane irregularities in gas diffusion electrode-based polymer electrolyte membrane fuel cells
Journal Article
·
· International Journal of Hydrogen Energy
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Colorado School of Mines, Golden, CO (United States)
- National Renewable Energy Lab. (NREL), Golden, CO (United States); Univ. of California, Riverside, CA (United States)
- National Renewable Energy Lab. (NREL), Golden, CO (United States); Colorado School of Mines, Golden, CO (United States)
Polymer electrolyte membrane fuel cells (PEMFC) show substantial promise for their application in electric vehicles. For large-scale manufacturing of PEMFCs, roll-to-roll coated gas-diffusion-electrodes (GDE) offer certain advantages over other production pathways. Procedures including hot pressing and coating an ionomer overlayer may be necessary for this manufacturing pathway to enable a suitable catalyst layer/membrane interface. The same procedures may potentially introduce membrane irregularities, especially when thin membranes are used. Limited understanding exists regarding if and to what extent such irregularities impact PEMFC performance and lifetime, and therefore be considered defects. In this study, NREL's customized fuel cell hardware that enables quasi in-situ infrared (IR) thermography studies was utilized to visualize spatial hydrogen crossover and identify membrane irregularities that originated from the GDE-based MEA fabrication process. The structure of these membrane irregularities was investigated by scanning electron microscopy (SEM) and its impact on initial H2/air performance was determined. Accelerated stress testing (AST) revealed that these irregularities develop into failure point locations. These results were validated across many MEAs with identified process-induced membrane irregularities. By selecting specific gas diffusion media properties and by fine tuning the MEA hot pressing parameters, the formation of such membrane irregularities was mitigated.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Hydrogen and Fuel Cell Technologies Office (EE-3F)
- Grant/Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1769844
- Alternate ID(s):
- OSTI ID: 1775192
- Report Number(s):
- NREL/JA-5900-79294; MainId:33520; UUID:08e9549d-33f0-420f-a359-1d35e04fa7a3; MainAdminID:19803
- Journal Information:
- International Journal of Hydrogen Energy, Journal Name: International Journal of Hydrogen Energy Journal Issue: 27 Vol. 46; ISSN 0360-3199
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Impacts of electrode coating irregularities on polymer electrolyte membrane fuel cell lifetime using quasi in-situ infrared thermography and accelerated stress testing
Fabrication of high-performance gas-diffusion-electrode based membrane-electrode assemblies
Development of high-performance roll-to-roll-coated gas-diffusion-electrode-based fuel cells
Journal Article
·
Thu Mar 01 19:00:00 EST 2018
· International Journal of Hydrogen Energy
·
OSTI ID:1426642
Fabrication of high-performance gas-diffusion-electrode based membrane-electrode assemblies
Journal Article
·
Tue Jan 28 19:00:00 EST 2020
· Journal of Power Sources
·
OSTI ID:1603262
Development of high-performance roll-to-roll-coated gas-diffusion-electrode-based fuel cells
Journal Article
·
Sun Jun 06 20:00:00 EDT 2021
· Journal of Power Sources
·
OSTI ID:1788428