An effective strategy to enhancing tolerance to contaminants poisoning of solid oxide fuel cell cathodes
Abstract
Commercialization of solid oxide fuel cells (SOFCs) is impeded by severe cathode degradation from the poisoning effect of contaminants commonly encountered in air (such as H2O and CO2) and from other cell components (e.g., Cr species from chromium-containing interconnector). Here we report our findings in unraveling the mechanism of Cr poisoning of La.6Sr.4Co.2Fe.8O3 (LSCF) cathodes using our unique in situ/operando surface enhanced Raman spectroscopy. Further, we present an effective strategy to enhancing the tolerance to contaminants poisoning of LSCF cathode through infiltration of a hybrid catalyst coating, which is composed of a conformal film of perovskite PrNi.5Mn.5O3 (PNM) and exsoluted PrOx nano-particles. The coating is catalytically active to oxygen reduction reaction but inert to contaminant poisoning. When subjected to an accelerated Cr-poisoning test, the cells with a hybrid catalyst-coated LSCF cathode show excellent peak power density (Pmax of 0.71 Wcm-2) and significantly enhanced durability (degradation rate of 0.0434% h-1 at 0.7 V), much better than those of cells with a bare LSCF cathode (Pmax of ~0.46 Wcm-2 and degradation rate of 0.4% h-1 at 0.7 V). The results suggest that surface modification of electrodes with a coating of rationally designed catalysts is a cost-effective approach to dramatically reducing electrode degradationmore »
- Authors:
-
- Georgia Institute of Technology, Atlanta, GA (United States)
- South China University of Technology (SCUT), Guangzhou (China)
- Publication Date:
- Research Org.:
- Georgia Institute of Technology, Atlanta, GA (United States)
- Sponsoring Org.:
- USDOE Advanced Research Projects Agency - Energy (ARPA-E)
- OSTI Identifier:
- 1538633
- Alternate Identifier(s):
- OSTI ID: 1582823
- Grant/Contract Number:
- AR0000502; FE0009652; FE0026106
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Nano Energy
- Additional Journal Information:
- Journal Volume: 47; Journal Issue: C; Journal ID: ISSN 2211-2855
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; fuel cell; solid oxide fuel cell; oxygen reduction; cathode; raman spectroscopy
Citation Formats
Chen, Yu, Yoo, Seonyoung, Li, Xiaxi, Ding, Dong, Pei, Kai, Chen, Dongchang, Ding, Yong, Zhao, Bote, Murphy, Ryan, deGlee, Ben, Liu, Jiang, and Liu, Meilin. An effective strategy to enhancing tolerance to contaminants poisoning of solid oxide fuel cell cathodes. United States: N. p., 2018.
Web. doi:10.1016/j.nanoen.2018.03.043.
Chen, Yu, Yoo, Seonyoung, Li, Xiaxi, Ding, Dong, Pei, Kai, Chen, Dongchang, Ding, Yong, Zhao, Bote, Murphy, Ryan, deGlee, Ben, Liu, Jiang, & Liu, Meilin. An effective strategy to enhancing tolerance to contaminants poisoning of solid oxide fuel cell cathodes. United States. https://doi.org/10.1016/j.nanoen.2018.03.043
Chen, Yu, Yoo, Seonyoung, Li, Xiaxi, Ding, Dong, Pei, Kai, Chen, Dongchang, Ding, Yong, Zhao, Bote, Murphy, Ryan, deGlee, Ben, Liu, Jiang, and Liu, Meilin. 2018.
"An effective strategy to enhancing tolerance to contaminants poisoning of solid oxide fuel cell cathodes". United States. https://doi.org/10.1016/j.nanoen.2018.03.043. https://www.osti.gov/servlets/purl/1538633.
@article{osti_1538633,
title = {An effective strategy to enhancing tolerance to contaminants poisoning of solid oxide fuel cell cathodes},
author = {Chen, Yu and Yoo, Seonyoung and Li, Xiaxi and Ding, Dong and Pei, Kai and Chen, Dongchang and Ding, Yong and Zhao, Bote and Murphy, Ryan and deGlee, Ben and Liu, Jiang and Liu, Meilin},
abstractNote = {Commercialization of solid oxide fuel cells (SOFCs) is impeded by severe cathode degradation from the poisoning effect of contaminants commonly encountered in air (such as H2O and CO2) and from other cell components (e.g., Cr species from chromium-containing interconnector). Here we report our findings in unraveling the mechanism of Cr poisoning of La.6Sr.4Co.2Fe.8O3 (LSCF) cathodes using our unique in situ/operando surface enhanced Raman spectroscopy. Further, we present an effective strategy to enhancing the tolerance to contaminants poisoning of LSCF cathode through infiltration of a hybrid catalyst coating, which is composed of a conformal film of perovskite PrNi.5Mn.5O3 (PNM) and exsoluted PrOx nano-particles. The coating is catalytically active to oxygen reduction reaction but inert to contaminant poisoning. When subjected to an accelerated Cr-poisoning test, the cells with a hybrid catalyst-coated LSCF cathode show excellent peak power density (Pmax of 0.71 Wcm-2) and significantly enhanced durability (degradation rate of 0.0434% h-1 at 0.7 V), much better than those of cells with a bare LSCF cathode (Pmax of ~0.46 Wcm-2 and degradation rate of 0.4% h-1 at 0.7 V). The results suggest that surface modification of electrodes with a coating of rationally designed catalysts is a cost-effective approach to dramatically reducing electrode degradation caused by contaminations.},
doi = {10.1016/j.nanoen.2018.03.043},
url = {https://www.osti.gov/biblio/1538633},
journal = {Nano Energy},
issn = {2211-2855},
number = C,
volume = 47,
place = {United States},
year = {Thu Mar 15 00:00:00 EDT 2018},
month = {Thu Mar 15 00:00:00 EDT 2018}
}
Web of Science
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