Work

LSF films formed on YSZ electrolytes via polymeric precursor deposition for solid oxide fuel cell anode applications

Year: 2023

Type: article

Abstract: Different materials have been applied as anode in solid oxide fuel cell (SOFC). Perovskite structured materials are promising as an alternative electrode material to Ni. Here, we investigated perovskite‐structured mixed ionic and electronic conducting material, lanthanum strontium ferrite (LSF), which has typically been used as a cathode material. LSF has also shown potential for an anode in SOFC. LSF films with two different compositions, La0.6Sr0.4FeO3 (6LSF) and La0.8Sr0.2FeO3 (8LSF) were fabricated by a polymeric precursor method. The effects of the phase content, surface chemistry, and microstructure on the anode performance were investigated. It was found that a mixture of the Ruddlesden–Popper phase, SrCO3 phases, and rhombohedral perovskite exists in both cell structures. Both cells had Ruddlesden–Popper and SrCO3 phases at their surface, in addition to the rhombohedral perovskite. Symmetrical half‐cell measurements showed that the polarization resistance of 6LSF (0.34 Ω cm2) is lower than that of 8LSF (0.47 Ω cm2), mostly because of its highly porous microstructure as a result of slower A‐site diffusion rates induced by higher Sr content. The symmetrical 6LSF fuel and air electrodes exhibited ASRelectrode values of 0.34 and 0.14 Ω cm2, respectively, at 800 ˚C.

Source: Fuel Cells

DOI: 10.1002/fuce.202300153

Authors: Buse Bilbey, M. Imran Asghar, Leyla Colakerol Arslan, Peter D. Lund, Aligul Büyükaksoy

Institutions: Gebze Technical University, Aalto University

Language: English

Topic: Advancements in Solid Oxide Fuel Cells

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: bronze

Funder: Academy of Finland