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Title: La 0.6Sr 0.4Co 0.2Fe 0.8O 3-δ cathodes infiltrated with samarium-doped cerium oxide for solid oxide fuel cells

Abstract

Porous La 0.6Sr 0.4Co 0.2Fe 0.8O 3-δ (LSCF) cathodes are coated with a thin film of Sm 0.2Ce 0.8O 1.95-δ (SDC) using a one-step infiltration process. Examination of the microstructures reveals that small SDC particles are formed on the surface of LSCF grains with a relatively narrow size distribution. Impedance analysis indicates that the SDC infiltration has dramatically reduced the polarization of LSCF cathode, reaching interfacial resistances of 0.074 and 0.44 Ω cm 2 at 750 °C and 650 °C, respectively, which are about half of those for LSCF cathode without infiltration of SDC. The activation energies of the SDC infiltrated LSCF cathodes are in the range of 1.42–1.55 eV, slightly lower than those for a blank LSCF cathode. The SDC infiltrated LSCF cathodes have also shown improved stability under typical SOFC operating conditions, suggesting that SDC infiltration improves not only power output but also performance stability and operational life.

Authors:
; ; ;
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Heterogeneous Functional Materials Center (HeteroFoaM)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1381287
DOE Contract Number:  
SC0001061
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Power Sources; Journal Volume: 195; Journal Issue: 15; Related Information: HeteroFoaM partners with University of South Carolina (lead); University of California, Santa Barbara; University of Connecticut; Georgia Institute of Technology; Princeton University; Rochester Institute of Technology; Savannah River National Laboratory; University of South Carolina; University of Utah
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 30 DIRECT ENERGY CONVERSION; catalysis (heterogeneous), energy storage (including batteries and capacitors), hydrogen and fuel cells, mechanical behavior, charge transport, membrane, carbon sequestration, materials and chemistry by design, synthesis (novel materials), synthesis (self-assembly), synthesis (scalable processing)

Citation Formats

Nie, Lifang, Liu, Mingfei, Zhang, Yujun, and Liu, Meilin. La0.6Sr0.4Co0.2Fe0.8O3-δ cathodes infiltrated with samarium-doped cerium oxide for solid oxide fuel cells. United States: N. p., 2010. Web. doi:10.1016/j.jpowsour.2010.02.049.
Nie, Lifang, Liu, Mingfei, Zhang, Yujun, & Liu, Meilin. La0.6Sr0.4Co0.2Fe0.8O3-δ cathodes infiltrated with samarium-doped cerium oxide for solid oxide fuel cells. United States. doi:10.1016/j.jpowsour.2010.02.049.
Nie, Lifang, Liu, Mingfei, Zhang, Yujun, and Liu, Meilin. Sun . "La0.6Sr0.4Co0.2Fe0.8O3-δ cathodes infiltrated with samarium-doped cerium oxide for solid oxide fuel cells". United States. doi:10.1016/j.jpowsour.2010.02.049.
@article{osti_1381287,
title = {La0.6Sr0.4Co0.2Fe0.8O3-δ cathodes infiltrated with samarium-doped cerium oxide for solid oxide fuel cells},
author = {Nie, Lifang and Liu, Mingfei and Zhang, Yujun and Liu, Meilin},
abstractNote = {Porous La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) cathodes are coated with a thin film of Sm0.2Ce0.8O1.95-δ (SDC) using a one-step infiltration process. Examination of the microstructures reveals that small SDC particles are formed on the surface of LSCF grains with a relatively narrow size distribution. Impedance analysis indicates that the SDC infiltration has dramatically reduced the polarization of LSCF cathode, reaching interfacial resistances of 0.074 and 0.44 Ω cm2 at 750 °C and 650 °C, respectively, which are about half of those for LSCF cathode without infiltration of SDC. The activation energies of the SDC infiltrated LSCF cathodes are in the range of 1.42–1.55 eV, slightly lower than those for a blank LSCF cathode. The SDC infiltrated LSCF cathodes have also shown improved stability under typical SOFC operating conditions, suggesting that SDC infiltration improves not only power output but also performance stability and operational life.},
doi = {10.1016/j.jpowsour.2010.02.049},
journal = {Journal of Power Sources},
number = 15,
volume = 195,
place = {United States},
year = {Sun Aug 01 00:00:00 EDT 2010},
month = {Sun Aug 01 00:00:00 EDT 2010}
}