New Insights into the Degradation Behavior of Air Electrodes during Solid Oxide Electrolysis and Reversible Solid Oxide Cell Operation
Article
Article Title | New Insights into the Degradation Behavior of Air Electrodes during Solid Oxide Electrolysis and Reversible Solid Oxide Cell Operation |
---|---|
ERA Journal ID | 200427 |
Article Category | Article |
Authors | Khan, Muhammad Shirjeel, Xu, Xiaoyong, Knibbe, Ruth, Rehman, Ateeq Ur, Li, Zhiheng, Yago, Anya Josefa, Wang, Hao and Zhu, Zhonghua |
Journal Title | Energy Technology: generation, conversion, storage, distribution |
Journal Citation | 8 (9) |
Article Number | 2000241 |
Number of Pages | 10 |
Year | 2020 |
Publisher | John Wiley & Sons |
Place of Publication | Germany |
ISSN | 2194-4288 |
2194-4296 | |
Digital Object Identifier (DOI) | https://doi.org/10.1002/ente.202000241 |
Web Address (URL) | https://onlinelibrary-wiley-com.ezproxy.usq.edu.au/doi/full/10.1002/ente.202000241 |
Abstract | The commercialization of reversible solid oxide cells (RSOCs) is limited by the severe degradation of the air electrodes during solid oxide electrolysis cells (SOECs) operation. Herein, the degradation behavior of (La0.8Sr0.2)0.95Mn1−xCoxO3−δ (LSMC) air electrodes where x = 0.1, 0.3, and 0.5 is reported. After the SOEC test, the air electrode with x = 0.1 delaminates. While previous studies reported delamination due to the disintegration of air electrodes, for the first time, it is shown that delamination can also occur due to the disintegration of the samaria-doped ceria (SDC) barrier layer into nanoparticles. The formation of such nanoparticles weakens the contact between the air electrode and barrier layer and encourages delamination. The air electrode with x = 0.3, shows excellent long-term stability and also produces an electrolysis current density of 0.63 A cm−2 in 50% H2O/50% H2 at 1.3 V. This mechanistic study will allow researchers to develop air electrodes with improved long-term stability. |
Keywords | delamination; interfaces; oxygen partial pressures; reversible solid oxide cells |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 401602. Composite and hybrid materials |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Queensland |
Centre for Future Materials |
https://research.usq.edu.au/item/zqvq8/new-insights-into-the-degradation-behavior-of-air-electrodes-during-solid-oxide-electrolysis-and-reversible-solid-oxide-cell-operation
25
total views0
total downloads9
views this month0
downloads this month