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

Journal Article · · Electrochimica Acta
 [1];  [2];  [3];  [3];  [3];  [3];  [4]
  1. Huazhong Univ. of Science and Technology, Wuhan (China); Univ. of South Carolina, Columbia, SC (United States); University of South Carolina
  2. Hubei Univ., Wuhan (China)
  3. Huazhong Univ. of Science and Technology, Wuhan (China)
  4. Univ. of South Carolina, Columbia, SC (United States)
+ Show Author Affiliations
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.
Research Organization:
Univ. of South Carolina, Columbia, SC (United States)
Sponsoring Organization:
National Natural Science Foundation of China; USDOE; USDOE Office of Fossil Energy (FE)
Grant/Contract Number:
FE0031176
OSTI ID:
1545481
Alternate ID(s):
OSTI ID: 1775722
Journal Information:
Electrochimica Acta, Journal Name: Electrochimica Acta Journal Issue: C Vol. 319; ISSN 0013-4686
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

25 ENERGY STORAGE
BSCF
Coating
Cr-tolerance
IT-SOFC
Metallic interconnect