Specific Cation Diffusion across the (La,Sr)MnO3 (Ce,Gd)O2 interface in SOFCs

TL;DR

This paper investigates cation diffusion and oxygen deficiency at the atomic level across oxide interfaces in SOFCs, focusing on (La,Sr)MnO3 and Ce,Gd)O2, to better understand their impact on material properties.

Contribution

It provides atomic-scale insights into cation diffusion and oxygen vacancies at oxide interfaces in SOFC materials, a topic not extensively studied before.

Findings

Identified specific cation diffusion pathways at the interface.

Revealed oxygen deficiency presence at the interface.

Enhanced understanding of interfacial chemistry in SOFCs.

Abstract

Oxide interfaces play very important roles for the physical and chemical properties of nanostructured materials, such as an ionic conductivity, superconductivity, and magnetism. Gadolinia-doped Ceria (GDC) is commonly selected as the interlayer between (La,Sr)MnO3 and Y2O3-stabilized ZrO2 in fuel cells. The chemical expansions across the oxide interlayer were carefully examined at the atomic resolution in order to understand the cation diffusion and existence of oxygen deficiency at the interfaces.