About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Materials for Energy Conversion and Storage 2023
|
Presentation Title |
Analysis of Degradation of (Ni-YSZ) Fuel Electrode during SOEC Operation |
Author(s) |
Uday Bhanu Pal, John-In Lee, Jillian Rix Mulligan, Ayesha Akter, Soumendra Basu, Srikanth Gopalan |
On-Site Speaker (Planned) |
Uday Bhanu Pal |
Abstract Scope |
Solid oxide electrolysis cells (SOECs) are used to convert steam to hydrogen gas in our effort to transition to a renewable-energy economy. SOECs currently suffer from durability issues. Durability of SOECs is affected by numerous factors. Here we investigate performance degradation associated with the Nickel-Yttria-stabilized zirconia (Ni-YSZ) fuel electrode. This problem is thought to be caused primarily by nickel in the Ni-cermet driven by the chemical reaction, Ni(bulk)+H2O+Empty Ni(111)site ↔ NiOH on Ni(111)site+1/2H2. This phenomenon is investigated by changing operating condition, such as flow rate of hydrogen and H2O content of the fuel side gas. Furthermore, these experimental parameters are also being studied with GDC infiltrated Ni-YSZ fuel electrodes to determine whether the infiltration can positively influence these reactions and enhance performance durability. Measurements to evaluate and analyze performance of these fuel electrodes include I-V measurements, electrochemical impedance spectroscopy, distribution of relaxation times, and scanning electron microscopy (SEM). |
Proceedings Inclusion? |
Planned: |
Keywords |
Energy Conversion and Storage, Characterization, Characterization |