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:
-
- Huazhong Univ. of Science and Technology, Wuhan (China); Univ. of South Carolina, Columbia, SC (United States)
- Hubei Univ., Wuhan (China)
- Huazhong Univ. of Science and Technology, Wuhan (China)
- 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 (NSFC)
- OSTI Identifier:
- 1545481
- Alternate Identifier(s):
- OSTI ID: 1775722
- 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. https://doi.org/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. https://doi.org/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}
}
Web of Science