18 November 2024
A study on solid oxide cell barrier layers by IREC
Thickness effect of thin-film barrier layers for enhanced long-term operation of solid oxide fuel cells

Written by L. Bernadet, F. Buzi, F. Baiutti, J. Segura-Ruiz, J. Dolado, D. Montinaro, M. Torrell, A. Morata, A. Tarancón
This work, published in APL Energy, highlights advancements in solid oxide cell (SOC) technology, focusing on the diffusion barrier layer between the zirconia-based electrolytes and oxygen electrodes which aims to prevent the formation of insulating secondary phases that reduce the cells’ performance. As part of the 24/7 ZEN EU project, IREC developed ultra-thin (200 nm) and dense gadolinia-doped ceria (GDC) barrier layers using the Pulsed Laser Deposition technique, able to block the cations interdiffusion. Excellent electrochemical performance was obtained, boosting cell performance by 45% compared to state-of-the-art cells and ensuring stability for 3500 hours under SOFC operation using hydrogen as fuel.
Solid oxide cells are a promising solution for renewable hydrogen and a sustainable future. This study showed that the implementation of dense and extremely thin barrier layers can effectively protect against secondary phase formation and prevent the destabilization of electrolytes and cathodes. Their use offers a significant advantage by reducing manufacturing time, energy consumption, and costs for improving long-term SOC performance.
Read more here: https://doi.org/10.1063/5.0159765