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Title: Modeling Hierarchical Non-Precious Metal Catalyst Cathodes for PEFCs Using Multi-Scale X-ray CT Imaging

This paper reports the development of a model for simulating polymer electrolyte fuel cells (PEFCs) with non-precious metal catalyst (NPMC) cathodes. NPMCs present an opportunity to dramatically reduce the cost of PEFC electrodes by removing the costly Pt catalyst. To address the significant transport losses in thick NPMC cathodes (ca. >60 µm), we developed a hierarchical electrode model that resolves the unique structure of the NPMCs we studied. A unique feature of the approach is the integration of the model with morphology data extracted from nano-scale resolution X-ray computed tomography (nano-CT) imaging of the electrodes. A notable finding is the impact of the liquid water accumulation in the electrode and the significant performance improvement possible if electrode flooding is mitigated.
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [1]
  1. Carnegie Mellon Univ., Pittsburgh, PA (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Report Number(s):
LA-UR-17-24489
Journal ID: ISSN 1938-6737
Grant/Contract Number:
AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
ECS Transactions (Online)
Additional Journal Information:
Journal Name: ECS Transactions (Online); Journal Volume: 64; Journal Issue: 3; Journal ID: ISSN 1938-6737
Publisher:
Electrochemical Society
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE). Fuel Cell Technologies Program (EE-3F)
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; Energy Sciences; Fuel Cell, computed tomography,
OSTI Identifier:
1375886

Komini Babu, S., Chung, H. T., Wu, G., Zelenay, P., and Litster, S.. Modeling Hierarchical Non-Precious Metal Catalyst Cathodes for PEFCs Using Multi-Scale X-ray CT Imaging. United States: N. p., Web. doi:10.1149/06403.0281ecst.
Komini Babu, S., Chung, H. T., Wu, G., Zelenay, P., & Litster, S.. Modeling Hierarchical Non-Precious Metal Catalyst Cathodes for PEFCs Using Multi-Scale X-ray CT Imaging. United States. doi:10.1149/06403.0281ecst.
Komini Babu, S., Chung, H. T., Wu, G., Zelenay, P., and Litster, S.. 2014. "Modeling Hierarchical Non-Precious Metal Catalyst Cathodes for PEFCs Using Multi-Scale X-ray CT Imaging". United States. doi:10.1149/06403.0281ecst. https://www.osti.gov/servlets/purl/1375886.
@article{osti_1375886,
title = {Modeling Hierarchical Non-Precious Metal Catalyst Cathodes for PEFCs Using Multi-Scale X-ray CT Imaging},
author = {Komini Babu, S. and Chung, H. T. and Wu, G. and Zelenay, P. and Litster, S.},
abstractNote = {This paper reports the development of a model for simulating polymer electrolyte fuel cells (PEFCs) with non-precious metal catalyst (NPMC) cathodes. NPMCs present an opportunity to dramatically reduce the cost of PEFC electrodes by removing the costly Pt catalyst. To address the significant transport losses in thick NPMC cathodes (ca. >60 µm), we developed a hierarchical electrode model that resolves the unique structure of the NPMCs we studied. A unique feature of the approach is the integration of the model with morphology data extracted from nano-scale resolution X-ray computed tomography (nano-CT) imaging of the electrodes. A notable finding is the impact of the liquid water accumulation in the electrode and the significant performance improvement possible if electrode flooding is mitigated.},
doi = {10.1149/06403.0281ecst},
journal = {ECS Transactions (Online)},
number = 3,
volume = 64,
place = {United States},
year = {2014},
month = {8}
}