RT Journal Article
T1 Superior Performance as Cathode Material for Intermediate-Temperature Solid Oxide Fuel Cells of the Ruddlesden−Popper n = 2 Member Eu2SrCo0.50Fe1.50O7−δ with Low Cobalt Content
A1 Muñoz Gil, Daniel
A1 Boulahya, Khalid
A1 Santoyo, María Santamaria
A1 Azcondo, Teresa
A1 Amador, Ulises
AB The effects of the contents of iron and cobalt on the crystal structure, oxygen content, thermal expansion coefficient, and electrical−electrochemical properties of materials Eu2SrCoxFe2−xO7−δ (x = 0.50 and 1.00) are reported. These oxides are well-ordered new members of the Ruddlesden−Popper series (Eu,Sr)n+1(Co,Fe)nO3n+1 system with n = 2 as determined by selected area electron diffraction and high-resolution transmission electron microscopy and X-ray diffraction studies. The two materials are semiconductors of p-type, with much higher total conductivity under working conditions for the low cobalt compound, Eu2SrCo0.50Fe1.50O7−δ. Composite cathodes prepared with this oxide present much lower area-specific resistance values (0.08 Ω·cm2 at 973 K in air) than composites containing Eu2SrCo1.00Fe1.00O7−δ (1.15 Ω·cm2). This significant difference is related to the much higher total conductivity and a sufficiently high content of oxygen vacancies in the Fe-rich phase. The excellent electrochemical performance of Eu2SrCo0.50Fe1.50O7−δ with low cobalt content, which shows one of the lowest area-specific resistance reported so far for a Ruddlesden−Popper oxide, makes it a good candidate for application as a cathode material for solid oxide fuel cells at intermediate temperatures in real devices.
PB American Chemical Society
SN 0020-1669
YR 2021
FD 2021
LK https://hdl.handle.net/20.500.14352/94287
UL https://hdl.handle.net/20.500.14352/94287
LA eng
NO Daniel Muñoz Gil, Khalid Boulahya, María Santamaria Santoyo, M. Teresa Azcondo, and Ulises Amador Inorganic Chemistry 2021 60 (5), 3094-3105 DOI: 10.1021/acs.inorgchem.0c03391
NO European Commission
NO Ministerio de Economía y Competitividad (España)
DS Docta Complutense
RD 7 abr 2025