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Evaluation of Cr-Tolerance of the Sr 2 Fe 1.5 Mo 0.5 O 6-δ Cathode for Solid Oxide Fuel Cells

Journal Article · · ACS Applied Energy Materials
 [1];  [2];  [3];  [4];  [5];  [5];  [2]
  1. Univ. of South Carolina, Columbia, SC (United States); Huazhong Univ. of Science and Technology, Wuhan (China); University of South Carolina
  2. Univ. of South Carolina, Columbia, SC (United States)
  3. Univ. of South Carolina, Columbia, SC (United States); Guangdong Univ. of Technology, Guangzhou, Guangdong (China)
  4. Tianjin Univ. of Technology, Tianjin (China)
  5. Huazhong Univ. of Science and Technology, Wuhan (China)
+ Show Author Affiliations
Sr2Fe1.5Mo0.5O6-δ (SFM) is a promising electrode material recently studied for intermediate temperature solid oxide fuel cells (IT-SOFCs). In this work, Cr-tolerance of SFM has been systematically assessed. Due to the presence of Sr at the A-site, SFM has been found to be vulnerable to Cr species resulted from the metallic interconnects. The main product of Cr-poisoning for SFM is SrCrO4 deposited on the SFM surface. Furthermore, the Cr-poisoning mechanism of the SFM material has been evaluated both experimentally and thermodynamically. To enhance Cr-tolerance of SFM, LaCoO3-δ-infiltrated SFM (LC@SFM) has been developed. LC hinders the direct contact of SFM with Cr species and LC@SFM has significantly enhanced Cr-tolerance than SFM. This study provides valuable guidance for the wide application of SFM cathode in IT-SOFCs.
Research Organization:
Univ. of South Carolina, Columbia, SC (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE)
Grant/Contract Number:
FE0031176
OSTI ID:
1571440
Journal Information:
ACS Applied Energy Materials, Journal Name: ACS Applied Energy Materials Journal Issue: 10 Vol. 2; ISSN 2574-0962
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
Cathode
Cr species
Cr-tolerance
IT-SOFCs
SFM