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Title: Effective Electrode Edge Protection for Proton Exchange Membrane Fuel Cell Drive Cycle Operation

Abstract

Drive cycle (DC) tests employ rapid load cycling which will result in rapidly changing local operating conditions and consequently high non-uniform mechanical stress at the electrode perimeter. In order to better investigate the impact of electrode irregularities on the long-term behavior of the cell, it is necessary to exclude the edge effects of the membrane electrode assemblies (MEAs) as a failure mode. Therefore, an effective electrode edge protection technique using thin protective gaskets and a hot-pressing procedure was developed which dramatically prolonged lifetime. Open circuit voltage (OCV), air polarization curve, and hydrogen crossover limiting current density were monitored during the DC tests. For post-DC ex-situ analysis, an in-house developed pinhole detection apparatus was employed to analyze quantity, size, and location of the failure points of MEAs with and without edge protection. Non-protected MEAs typically developed tears at the electrode perimeter, while the longer-lasting protected MEAs exhibited seemingly random pinhole development.

Authors:
 [1];  [2]; ORCiD logo [1]; ORCiD logo [1];  [1]
  1. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
  2. National Renewable Energy Laboratory (NREL), Golden, CO (United States); Colorado School of Mines
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Fuel Cell Technologies Office (EE-3F)
OSTI Identifier:
1570822
Report Number(s):
NREL/JA-5900-74427
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Journal Article
Journal Name:
ECS Transactions
Additional Journal Information:
Journal Volume: 92; Journal Issue: 8
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; fuel cell; PEMFC; membrane electrode assembly; MEA; performance; roll to roll; R2R; manufacturing

Citation Formats

Wang, Min, Rome, Grace, Phillips, Adam, Ulsh, Michael J, and Bender, Guido. Effective Electrode Edge Protection for Proton Exchange Membrane Fuel Cell Drive Cycle Operation. United States: N. p., 2019. Web. doi:https://dx.doi.org/10.1149/09208.0351ecst.
Wang, Min, Rome, Grace, Phillips, Adam, Ulsh, Michael J, & Bender, Guido. Effective Electrode Edge Protection for Proton Exchange Membrane Fuel Cell Drive Cycle Operation. United States. doi:https://dx.doi.org/10.1149/09208.0351ecst.
Wang, Min, Rome, Grace, Phillips, Adam, Ulsh, Michael J, and Bender, Guido. Fri . "Effective Electrode Edge Protection for Proton Exchange Membrane Fuel Cell Drive Cycle Operation". United States. doi:https://dx.doi.org/10.1149/09208.0351ecst.
@article{osti_1570822,
title = {Effective Electrode Edge Protection for Proton Exchange Membrane Fuel Cell Drive Cycle Operation},
author = {Wang, Min and Rome, Grace and Phillips, Adam and Ulsh, Michael J and Bender, Guido},
abstractNote = {Drive cycle (DC) tests employ rapid load cycling which will result in rapidly changing local operating conditions and consequently high non-uniform mechanical stress at the electrode perimeter. In order to better investigate the impact of electrode irregularities on the long-term behavior of the cell, it is necessary to exclude the edge effects of the membrane electrode assemblies (MEAs) as a failure mode. Therefore, an effective electrode edge protection technique using thin protective gaskets and a hot-pressing procedure was developed which dramatically prolonged lifetime. Open circuit voltage (OCV), air polarization curve, and hydrogen crossover limiting current density were monitored during the DC tests. For post-DC ex-situ analysis, an in-house developed pinhole detection apparatus was employed to analyze quantity, size, and location of the failure points of MEAs with and without edge protection. Non-protected MEAs typically developed tears at the electrode perimeter, while the longer-lasting protected MEAs exhibited seemingly random pinhole development.},
doi = {https://dx.doi.org/10.1149/09208.0351ecst},
journal = {ECS Transactions},
number = 8,
volume = 92,
place = {United States},
year = {2019},
month = {10}
}