Thin Film Yttria-Stabilized Zirconia (YSZ) Electrolyte Fabricated by a Novel Chemical Solution Deposition (CSD) Process for Solid Oxide Fuel Cells (SOFCs)
- Thin Film Yttria-Stabilized Zirconia (YSZ) Electrolyte Fabricated by a Novel Chemical Solution Deposition (CSD) Process for Solid Oxide Fuel Cells (SOFCs)
- 오은옥; 황진명; 황해진; 이유리; 이종흔; 손지원; 김병국; 제해준; 이종호; 이해원
- Solid Oxide Fuel Cell (SOFC); YSZ; Electrolyte; Chemical Solution Deposition (CSD); Dense Thin Films; Porous Substrate
- Issue Date
- Journal of Nanoelectronics and Optoelectronics
- VOL 7, NO 5, 554-558
- Thin film yttria-stabilized zirconia (YSZ) electrolyte was fabricated on a rigid anode substrate by multiple spin coating of a chemical solution and low-temperature sintering. Differential densification resulted in reduced densification and microstructural heterogeneity due to the global constraint of the rigid substrate. Microstructural heterogeneity and pore anisotropy were greatly diminished by incorporating YSZ nanoparticles into the chemical solution; these act as local constraints in the precursor powder matrix. The resulting YSZ electrolyte had a residual porosity of 10-15% in the closed state, a thickness of about 500-700 nm, and grain/pore sizes less than 100 nm. A thin-film electrolyte cell showed a stable open-circuit voltage value of about 1.07 V with fairly good gas tightness, and exhibited a maximum power density of 427 mW/cm2 at 600 °C, demonstrating that YSZ is a potential alternative to vacuum deposition techniques.
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