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Title: Steady-State and Dynamic Modeling of Intermediate-Temperature Protonic Ceramic Fuel Cells

Abstract

Protonic ceramic fuel cells (PCFC) have emerged as a promising candidate for distributed power generation. The reduced temperature cells (~500°C) have the potential to enable faster start-up times, longer life, and lower cost materials compared to oxygen-ion conducting fuel cells. However, the modeling of PCFCs is confounded by several challenges, including estimating open circuit conditions for mixed charged conductors. Here we present the development of a PCFC computational framework for a predictive cell-level, interface charge transfer model capturing mixed conduction, as well as transients. Our approach employs a 1-D heterogeneous channel-level modeling strategy that resolves fuel depletion and flow configuration effects along the length of the channel and is coupled to a semi-empirical electrochemical model. The model is formulated in such a way that allows for easy integration of modeling parameters extracted from button cell experiments and performance scale-up to cell-level predictions. Humidified methane-fueled simulations display power densities above 0.125 W-cm-2 at 500°C, 0.15 A cm-2, and 80% fuel utilization cell conditions. Dynamic simulations indicate that the lower power density PCFCs (relative to solid oxide fuel cells) result in relatively slow thermal transients that could potentially dampen harmful effects of current-based fuel control during load-following operation.

Authors:
; ; ; ; ; ORCiD logo
Publication Date:
Research Org.:
Colorado School of Mines, Golden, CO (United States)
Sponsoring Org.:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
OSTI Identifier:
1530457
Alternate Identifier(s):
OSTI ID: 1613617
Grant/Contract Number:  
AR0000493
Resource Type:
Published Article
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Name: Journal of the Electrochemical Society Journal Volume: 166 Journal Issue: 10; Journal ID: ISSN 0013-4651
Publisher:
IOP Publishing - The Electrochemical Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Electrochemistry; Materials Science

Citation Formats

Albrecht, K. J., Dubois, A., Ferguson, K., Duan, C., O’Hayre, R. P., and Braun, R. J. Steady-State and Dynamic Modeling of Intermediate-Temperature Protonic Ceramic Fuel Cells. United States: N. p., 2019. Web. doi:10.1149/2.0651910jes.
Albrecht, K. J., Dubois, A., Ferguson, K., Duan, C., O’Hayre, R. P., & Braun, R. J. Steady-State and Dynamic Modeling of Intermediate-Temperature Protonic Ceramic Fuel Cells. United States. https://doi.org/10.1149/2.0651910jes
Albrecht, K. J., Dubois, A., Ferguson, K., Duan, C., O’Hayre, R. P., and Braun, R. J. Fri . "Steady-State and Dynamic Modeling of Intermediate-Temperature Protonic Ceramic Fuel Cells". United States. https://doi.org/10.1149/2.0651910jes.
@article{osti_1530457,
title = {Steady-State and Dynamic Modeling of Intermediate-Temperature Protonic Ceramic Fuel Cells},
author = {Albrecht, K. J. and Dubois, A. and Ferguson, K. and Duan, C. and O’Hayre, R. P. and Braun, R. J.},
abstractNote = {Protonic ceramic fuel cells (PCFC) have emerged as a promising candidate for distributed power generation. The reduced temperature cells (~500°C) have the potential to enable faster start-up times, longer life, and lower cost materials compared to oxygen-ion conducting fuel cells. However, the modeling of PCFCs is confounded by several challenges, including estimating open circuit conditions for mixed charged conductors. Here we present the development of a PCFC computational framework for a predictive cell-level, interface charge transfer model capturing mixed conduction, as well as transients. Our approach employs a 1-D heterogeneous channel-level modeling strategy that resolves fuel depletion and flow configuration effects along the length of the channel and is coupled to a semi-empirical electrochemical model. The model is formulated in such a way that allows for easy integration of modeling parameters extracted from button cell experiments and performance scale-up to cell-level predictions. Humidified methane-fueled simulations display power densities above 0.125 W-cm-2 at 500°C, 0.15 A cm-2, and 80% fuel utilization cell conditions. Dynamic simulations indicate that the lower power density PCFCs (relative to solid oxide fuel cells) result in relatively slow thermal transients that could potentially dampen harmful effects of current-based fuel control during load-following operation.},
doi = {10.1149/2.0651910jes},
journal = {Journal of the Electrochemical Society},
number = 10,
volume = 166,
place = {United States},
year = {Fri Jun 28 00:00:00 EDT 2019},
month = {Fri Jun 28 00:00:00 EDT 2019}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1149/2.0651910jes

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Cited by: 10 works
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