Electrical characterization and water sensitivity of Sr₂Fe_1.5Mo_0.5O_6-δ as a possible solid oxide fuel cell electrode

Journal Article · Sun Sep 01 00:00:00 EDT 2013 · Journal of Power Sources

DOI:https://doi.org/10.1016/j.jpowsour.2013.02.079· OSTI ID:1381913

Wright, James H.; Virkar, Anil V.; Liu, Qiang; Chen, Fanglin

Sr₂Fe_1.5Mo_0.5O_6-δ (SFMO) powders were synthesized by combustion synthesis. Porous samples were formed by uniaxial pressing of powder compacts and sintering in air. Electrical conductivity was measured by a four-point DC technique over a temperature range from 200 °C to 800 °C in air and in hydrogen. Crystal structures were investigated by X-ray diffractometry. Stability of powder samples was investigated in H₂O-containing atmospheres. It was observed that Sr₂Fe_1.5Mo_0.5O_6-δ was stable at 800 °C in water-containing atmospheres. However, it reacts with water at low temperatures. Reaction of Sr₂Fe_1.5Mo_0.5O_6-δ (SFMO) with water at low temperatures is a potential shortcoming of this material for application in solid oxide fuel cells (SOFC) due to concerns regarding degradation of the electrodes at low temperatures during cycling.

• Research Organization: Energy Frontier Research Centers (EFRC) (United States). Heterogeneous Functional Materials Center (HeteroFoaM)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES)
• DOE Contract Number: SC0001061
• OSTI ID: 1381913
• Journal Information: Journal of Power Sources, Vol. 237, Issue C; Related Information: HeteroFoaM partners with University of South Carolina (lead); University of California, Santa Barbara; University of Connecticut; Georgia Institute of Technology; Princeton University; Rochester Institute of Technology; Savannah River National Laboratory; University of South Carolina; University of Utah; ISSN 0378-7753
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
catalysis (heterogeneous)
energy storage (including batteries and capacitors)
hydrogen and fuel cells
mechanical behavior
charge transport
membrane
carbon sequestration
materials and chemistry by design
synthesis (novel materials)
synthesis (self-assembly)
synthesis (scalable processing)