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Title: LaCoO3-δ coated Ba0.5Sr0.5Co0.8Fe0.2O3-δ cathode for intermediate temperature solid oxide fuel cells

Abstract

Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) is a promising cathode for intermediate temperature solid oxide fuel cells. Yet, BSCF cathode performance stability has been a challenge and its electrochemical performance deteriorates severely in the presence of Cr2O3-forming metallic interconnect. We demonstrate that LaCoO3-δ (LC) coating on BSCF cathode can not only enhance BSCF electrochemical performance, but also effectively improve the BSCF performance stability. Here, LC-coated BSCF-Gd0.1Ce0.9O1.9 (LC@BSCF-GDC) cathode is prepared through a solution impregnation method and systematically characterized. EIS, XRD, Raman, SEM and EDS tests with and without SUS430 interconnect are conducted to characterize the Cr-tolerance. The results reflect that BSCF-GDC cathode is susceptible to Cr poisoning while LC@BSCF-GDC cathode has significantly enhanced tolerance to Cr poisoning. Single cells with LC@BSCF-GDC cathode achieve higher peak power density and smaller polarization resistance values than that of single cells with BSCF-GDC cathode. Furthermore, significant improvement of performance stability under a constant current load has been achieved for single cells with LC@BSCF-GDC cathode. This work provides a new solution for solving BSCF cathode performance stability.

Authors:
 [1];  [2];  [3];  [3];  [3];  [3];  [4]
  1. Huazhong Univ. of Science and Technology, Wuhan (China); Univ. of South Carolina, Columbia, SC (United States)
  2. Hubei Univ., Wuhan (China)
  3. Huazhong Univ. of Science and Technology, Wuhan (China)
  4. Univ. of South Carolina, Columbia, SC (United States)
Publication Date:
Research Org.:
Univ. of South Carolina, Columbia, SC (United States)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE); National Natural Science Foundation of China (NNSFC)
OSTI Identifier:
1545481
Grant/Contract Number:  
FE0031176
Resource Type:
Accepted Manuscript
Journal Name:
Electrochimica Acta
Additional Journal Information:
Journal Volume: 319; Journal Issue: C; Journal ID: ISSN 0013-4686
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; BSCF; IT-SOFC; Metallic interconnect; Coating; Cr-tolerance

Citation Formats

Qiu, Peng, Li, Jin, Jia, Lichao, Chi, Bo, Pu, Jian, Li, Jian, and Chen, Fanglin. LaCoO3-δ coated Ba0.5Sr0.5Co0.8Fe0.2O3-δ cathode for intermediate temperature solid oxide fuel cells. United States: N. p., 2019. Web. doi:10.1016/j.electacta.2019.07.054.
Qiu, Peng, Li, Jin, Jia, Lichao, Chi, Bo, Pu, Jian, Li, Jian, & Chen, Fanglin. LaCoO3-δ coated Ba0.5Sr0.5Co0.8Fe0.2O3-δ cathode for intermediate temperature solid oxide fuel cells. United States. doi:10.1016/j.electacta.2019.07.054.
Qiu, Peng, Li, Jin, Jia, Lichao, Chi, Bo, Pu, Jian, Li, Jian, and Chen, Fanglin. Fri . "LaCoO3-δ coated Ba0.5Sr0.5Co0.8Fe0.2O3-δ cathode for intermediate temperature solid oxide fuel cells". United States. doi:10.1016/j.electacta.2019.07.054. https://www.osti.gov/servlets/purl/1545481.
@article{osti_1545481,
title = {LaCoO3-δ coated Ba0.5Sr0.5Co0.8Fe0.2O3-δ cathode for intermediate temperature solid oxide fuel cells},
author = {Qiu, Peng and Li, Jin and Jia, Lichao and Chi, Bo and Pu, Jian and Li, Jian and Chen, Fanglin},
abstractNote = {Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) is a promising cathode for intermediate temperature solid oxide fuel cells. Yet, BSCF cathode performance stability has been a challenge and its electrochemical performance deteriorates severely in the presence of Cr2O3-forming metallic interconnect. We demonstrate that LaCoO3-δ (LC) coating on BSCF cathode can not only enhance BSCF electrochemical performance, but also effectively improve the BSCF performance stability. Here, LC-coated BSCF-Gd0.1Ce0.9O1.9 (LC@BSCF-GDC) cathode is prepared through a solution impregnation method and systematically characterized. EIS, XRD, Raman, SEM and EDS tests with and without SUS430 interconnect are conducted to characterize the Cr-tolerance. The results reflect that BSCF-GDC cathode is susceptible to Cr poisoning while LC@BSCF-GDC cathode has significantly enhanced tolerance to Cr poisoning. Single cells with LC@BSCF-GDC cathode achieve higher peak power density and smaller polarization resistance values than that of single cells with BSCF-GDC cathode. Furthermore, significant improvement of performance stability under a constant current load has been achieved for single cells with LC@BSCF-GDC cathode. This work provides a new solution for solving BSCF cathode performance stability.},
doi = {10.1016/j.electacta.2019.07.054},
journal = {Electrochimica Acta},
number = C,
volume = 319,
place = {United States},
year = {2019},
month = {7}
}

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