Loading…

Three-Dimensional Microstructural Analysis for the Characterization of Failure Mechanisms of a Novel SOEC

A novel fuel electrode-supported electrolysis cell has been developed as promising candidate for hydrogen production at intermediate temperatures. It contains a Ni-GDC electrode functional layer, a three-layer GDC-YSZ-GDC electrolyte and an LSC air electrode. Although this cell enables improved perf...

Full description

Saved in:
Bibliographic Details
Published in:ECS transactions 2023-05, Vol.111 (6), p.231-239
Main Authors: Wehner, Luzie, Lenser, Christian, Dzieciol, Krzysztof, Wessel, Egbert, Malzbender, Jürgen, Schwaiger, Ruth
Format: Article
Language:English
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A novel fuel electrode-supported electrolysis cell has been developed as promising candidate for hydrogen production at intermediate temperatures. It contains a Ni-GDC electrode functional layer, a three-layer GDC-YSZ-GDC electrolyte and an LSC air electrode. Although this cell enables improved performance compared to state-of-the-art YSZ electrolyte-based cells, especially at lower operation temperatures, 700 °C and below, and electrolysis currents around 1.2-1.7 A cm -2 a voltage drop and subsequently crack formation in the electrolyte was observed in initial studies. In the current work, FIB/SEM and X-ray computed tomography are used for microstructural investigations. Based on calculated microstructural parameters the suitability of the methods for an assessment of the failure mechanisms are discussed.
ISSN:1938-5862
1938-6737
DOI:10.1149/11106.0231ecst