Investigating fuel-cell transport limitations using hydrogen limiting current
Abstract
Reducing mass-transport losses in polymer-electrolyte fuel cells (PEFCs) is essential to increase their power density and reduce overall stack cost. At the same time, cost also motivates the reduction in expensive precious-metal catalysts, which results in higher local transport losses in the catalyst layers. Here, we use a hydrogen-pump limiting-current setup to explore the gas-phase transport losses through PEFC catalyst layers and various gas-diffusion and microporous layers. It is shown that the effective diffusivity in the gas-diffusion layers is a strong function of liquid saturation. Additionally, it is shown how the catalyst layer unexpectedly contributes significantly to the overall measured transport resistance. This is especially true for low catalyst loadings. It is also shown how the various losses can be separated into different mechanisms including diffusional processes and mass-dependent and independent ones, where the data suggests that a large part of the transport resistance in catalyst layers cannot be attributed to a gas-phase diffusional process. The technique is promising for deconvoluting transport losses in PEFCs.
- Authors:
-
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Energy Technologies Area
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Sustainable Transportation Office. Hydrogen Fuel Cell Technologies Office
- OSTI Identifier:
- 1379846
- Alternate Identifier(s):
- OSTI ID: 1396501
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- International Journal of Hydrogen Energy
- Additional Journal Information:
- Journal Volume: 42; Journal Issue: 19; Journal ID: ISSN 0360-3199
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 08 HYDROGEN; 30 DIRECT ENERGY CONVERSION; limiting current; resistance; catalyst layer; effective diffusivity; gas-diffusion layer; low loading
Citation Formats
Spingler, Franz B., Phillips, Adam, Schuler, Tobias, Tucker, Michael C., and Weber, Adam Z. Investigating fuel-cell transport limitations using hydrogen limiting current. United States: N. p., 2017.
Web. doi:10.1016/j.ijhydene.2017.01.036.
Spingler, Franz B., Phillips, Adam, Schuler, Tobias, Tucker, Michael C., & Weber, Adam Z. Investigating fuel-cell transport limitations using hydrogen limiting current. United States. https://doi.org/10.1016/j.ijhydene.2017.01.036
Spingler, Franz B., Phillips, Adam, Schuler, Tobias, Tucker, Michael C., and Weber, Adam Z. Thu .
"Investigating fuel-cell transport limitations using hydrogen limiting current". United States. https://doi.org/10.1016/j.ijhydene.2017.01.036. https://www.osti.gov/servlets/purl/1379846.
@article{osti_1379846,
title = {Investigating fuel-cell transport limitations using hydrogen limiting current},
author = {Spingler, Franz B. and Phillips, Adam and Schuler, Tobias and Tucker, Michael C. and Weber, Adam Z.},
abstractNote = {Reducing mass-transport losses in polymer-electrolyte fuel cells (PEFCs) is essential to increase their power density and reduce overall stack cost. At the same time, cost also motivates the reduction in expensive precious-metal catalysts, which results in higher local transport losses in the catalyst layers. Here, we use a hydrogen-pump limiting-current setup to explore the gas-phase transport losses through PEFC catalyst layers and various gas-diffusion and microporous layers. It is shown that the effective diffusivity in the gas-diffusion layers is a strong function of liquid saturation. Additionally, it is shown how the catalyst layer unexpectedly contributes significantly to the overall measured transport resistance. This is especially true for low catalyst loadings. It is also shown how the various losses can be separated into different mechanisms including diffusional processes and mass-dependent and independent ones, where the data suggests that a large part of the transport resistance in catalyst layers cannot be attributed to a gas-phase diffusional process. The technique is promising for deconvoluting transport losses in PEFCs.},
doi = {10.1016/j.ijhydene.2017.01.036},
journal = {International Journal of Hydrogen Energy},
number = 19,
volume = 42,
place = {United States},
year = {Thu Mar 09 00:00:00 EST 2017},
month = {Thu Mar 09 00:00:00 EST 2017}
}
Web of Science
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