Towards an atomic scale understanding of the early-stage deterioration mechanism of LSCF

Abstract

The early-stage degradation behaviour of a porous lanthanum strontium cobalt ferrite (LSCF) cathode in a solid oxide fuel cell is investigated at a low temperature of 600 °C by operating...

An in situ hydrothermally self-crystallized dense ceria-based barrier layer for solid oxide fuel cells

“…Investigations into the crystallinity and microstructure of the electrolyte surface aer hydrothermal treatment over specic durations (3,6,12,18,24,30, and 36 h) were conducted using XRD and SEM. The XRD spectra (Fig.…”

“…4,5 However, the inter-reaction between LSCF/LSC-based cathodes and YSZ electrolytes oen culminates in the formation of a detrimental (Sr,Zr)O 3 phase at high temperature, and this undesirable phase blocks not only reaction sites but also oxygen ion transport pathways, leading to serious degradation. 6 Barrier layers composed of Gd-, Sm-, or Y-doped CeO 2 (GDC, SDC, or YDC, respectively) are integrated into the single cell to mitigate these interfacial reactions. 7,8 The prevalent method of screen-printing, while effective with layers 2-5 mm thick, 9,10 introduces its own set of complications.…”

“…4,5 However, the inter-reaction between LSCF/LSC-based cathodes and YSZ electrolytes often culminates in the formation of a detrimental (Sr,Zr)O 3 phase at high temperature, and this undesirable phase blocks not only reaction sites but also oxygen ion transport pathways, leading to serious degradation. 6…”