Highly CO2-tolerant cathode for intermediate-temperature solid oxide fuel cells: samarium-doped ceria-protected SrCo0.85Ta0.15O3-δ hybrid

Li, Mengran, Zhou, Wei and Zhu, Zhonghua (2017) Highly CO2-tolerant cathode for intermediate-temperature solid oxide fuel cells: samarium-doped ceria-protected SrCo0.85Ta0.15O3-δ hybrid. ACS Applied Materials and Interfaces, 9 3: 2326-2333. doi:10.1021/acsami.6b12606


Author Li, Mengran
Zhou, Wei
Zhu, Zhonghua
Title Highly CO2-tolerant cathode for intermediate-temperature solid oxide fuel cells: samarium-doped ceria-protected SrCo0.85Ta0.15O3-δ hybrid
Formatted title
Highly CO2-tolerant cathode for intermediate-temperature solid oxide fuel cells: samarium-doped ceria-protected SrCo0.85Ta0.15O3-δ hybrid
Journal name ACS Applied Materials and Interfaces   Check publisher's open access policy
ISSN 1944-8252
1944-8244
Publication date 2017-01-25
Sub-type Article (original research)
DOI 10.1021/acsami.6b12606
Open Access Status Not yet assessed
Volume 9
Issue 3
Start page 2326
End page 2333
Total pages 8
Place of publication Washington, DC, United States
Publisher American Chemical Society
Collection year 2018
Language eng
Formatted abstract
Susceptibility to CO2 is one of the major challenges for the long-term stability of the alkaline-earth-containing cathodes for intermediate-temperature solid oxide fuel cells. To alleviate the adverse effects from CO2, we incorporated samarium-stabilized ceria (SDC) into a SrCo0.85Ta0.15O3-δ (SCT15) cathode by either mechanical mixing or a wet impregnation method and evaluated their cathode performance stability in the presence of a gas mixture of 10% CO2, 21% O2, and 69% N2. We observed that the CO2 tolerance of the hybrid cathode outperforms the pure SCT15 cathode by over 5 times at 550°C. This significant enhancement is likely attributable to the low CO2 adsorption and reactivity of the SDC protective layer, which are demonstrated through thermogravimetric analysis, energy-dispersive spectroscopy, and electrical conductivity study.
Keyword Cathode
CO2 poisoning
IT-SOFC
ORR
Stability
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
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