About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Materials for Energy Conversion and Storage 2023
|
Presentation Title |
Sulfur and Chromium Poisoning Mechanism of Lanthanum Nickelate Cathode Material: A Thermodynamic and Experimental Study |
Author(s) |
Rui Wang, Lucas R. Parent, Srikanth Gopalan, Yu Zhong |
On-Site Speaker (Planned) |
Yu Zhong |
Abstract Scope |
Ruddlesden-Popper (RP) type La2NiO4 (LNO) phase, as an intermediate temperature solid oxide fuel cell (IT-SOFC), has been used as an alternative SOFC cathode material due to its high efficiency and low emissions. To further understand the long-term degradation mechanism of the LNO phase in SO2 and Cr vapor gas impurities, LNO was prepared, sintered, and heat-treated at 800, 900, and 1000 ℃ in the sulfur, chromium, and water vapor-containing atmospheres, respectively. Later, XRD, SEM and TEM techniques were applied to the samples and corresponding simulations were made by the CALPHAD approach based on the same experimental conditions to verify the formation of the detrimental secondary phases. Results showed good agreement among the predictions and experiments. More importantly, extensive simulations were also conducted under different conditions (temperature, the partial pressure of oxygen and impurities) to understand the long-term degradation mechanism and optimize the operating conditions. |
Proceedings Inclusion? |
Planned: |
Keywords |
ICME, Energy Conversion and Storage, Modeling and Simulation |