Status : Verified
| Personal Name | Villanoy, Christopher Jason M. |
|---|---|
| Resource Title | Fabrication & Characterization of LSCF-GDC|YSZ|LSCF-GDC Solid Oxide Electrolysis Cell for CO2 electrolysis applications |
| Date Issued | 18 August 2025 |
| Abstract | Carbon dioxide (CO2) electrolysis using Solid Oxide Electrolysis Cells (SOECs) plays a key role in CO2 utilization technologies, such as the production of O2 gas. While Ni-YSZ is a widely used cathode material, it suffers from carbon deposition under dry CO2 conditions, limiting its long-term stability. Perovskite-based cathodes, particularly the composite of La0.6Sr0.4Co0.2Fe0.8O3-δ and CeO2-Gd2O3 (LSCF-GDC), have emerged as promising alternatives due to their mixed ionic-electronic conductivity and structural stability. In this study, symmetrical SOECs were fabricated with LSCF-GDC composite cathodes deposited on YSZ substrates using the screen-printing technique, with varying LSCF-GDC weight ratios of 30:70, 50:50, and 70:30 LSCF-GDC. The cells were characterized by their microstructure, morphology, and total conductivity. SEM/EDS analysis confirmed good homogeneity between LSCF and GDC phases and adequate porosity for gas diffusion with an observed thin film thickness of <20um. Electrochemical impedance spectroscopy revealed that the total conductivity for different studied composition ranges from 10-7 to 10-4 S/cm. The total conductivity trend shows that it is increasing as GDC weight percentage increases. The total conductivity in a CO2 environment was lower compared to O₂, likely due to the lower oxygen partial pressure and reduced availability of reactive oxygen species. In addition, initial investigation of the electrolysis performance was conducted for the 30:70 LSCF-GDC, which resulted in a current density of 51mA/cm2 and a 0.09% O2 production rate at 800℃. Thus, this study successfully fabricated a symmetrical LSCF-GDC cell for dry CO2 electrolysis; however, further optimization is needed to increase its performance |
| Degree Course | MS Materials Science & Engineering |
| Language | English |
| Keyword | LSCF-GDC, Carbon Dioxide Electrolysis, Solid Oxide Electrolysis Cells, Aerospace, Perovskite Cathode, |
| Material Type | Thesis/Dissertation |
Preliminary Pages
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