Thermodynamic and electrical properties of Ba0.5Sr0.5Co0.8Fe0.2O3-delta and La0.6Sr0.4Co0.2Fe0.8O3-delta for intermediate-temperature solid oxide fuel cells
Cited 0 times inCited 8 times in
- Thermodynamic and electrical properties of Ba0.5Sr0.5Co0.8Fe0.2O3-delta and La0.6Sr0.4Co0.2Fe0.8O3-delta for intermediate-temperature solid oxide fuel cells
- Jun, Areum; Yoo, Seonyoung; Gwon, Oh-hun; Shin, Jeeyoung; Kim, Guntae
- Alkaline earth; Cath-ode materials; Coulometric titration; Electrical conductivity; Electronic and ionic conductivity; Electronic conductivity; Intermediate temperature solid oxide fuel cell; IT-SOFCs; Low oxygen partial pressure; Oxygen non-stoichiometry; Oxygen partial pressure; Perovskite type oxides; Redox behavior; Redox stability
- Issue Date
- PERGAMON-ELSEVIER SCIENCE LTD
- ELECTROCHIMICA ACTA, v.89, no., pp.372 - 376
- Perovskite type oxides based on alkaline-earth and/or rare-earth containing cobaltites with high electronic and ionic conductivities are suitable for cathodes for intermediate-temperature solid oxide fuel cells (IT-SOFCs). Much of the prior work, in particular, has been focused on Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF) and La0.6Sr0.4Co0.2Fe0.8O3-delta (LSCF) because of their high catalytic activity and a sufficiently high electronic conductivity. This study focuses on the redox behavior and stability of BSCF and LSCF at low oxygen partial pressures. The variation of oxygen non-stoichiometry (delta) and its effect on the electrical conductivity of the BSCF and LSCF are investigated using coulometric titration in a wide range of oxygen partial pressure. Thermodynamic properties including oxidation enthalpies and entropies are determined from the oxidation isotherms. The BSCF and LSCF are considered to be a suitable cathode material of IT-SOFC in terms of electrical conductivity and redox stability.
- ; Go to Link
Appears in Collections:
- ECHE_Journal Papers
can give you direct access to the published full text of this article. (UNISTARs only)
Show full item record
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.