8YSZ Electrolyte Pellet (Disk & Sheet) for SOFC/SOEC Test, CSOFEC8YSZEP
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In the evaluation of Solid Oxide Fuel Cells (SOFC) and Electrolysis Cells (SOEC), a YSZ (Yttria-Stabilized Zirconia) electrolyte pellet (typically 8YSZ) serves as the structural foundation for "button cell" testing. These pellets are used in electrolyte-supported configurations to isolate and study the performance of new anode and cathode materials. Because YSZ is chemically inert and mechanically robust, it is the global baseline against which all other electrolyte materials are measured.
For reliable electrochemical testing, the YSZ pellet must meet strict physical standards to ensure gas tightness and consistent ohmic resistance: (1) Composition: 8 mol% Y2O3 stabilized ZrO2 (8YSZ). This provides the highest ionic conductivity in the zirconia family. (2) Dimensions: Usually 20 mm or 25 mm in diameter. (3) Thickness: 150 um to 500 um. Thinner pellets reduce the ohmic "background noise," making it easier to see small improvements in electrode performance. (4) Density: Must be >99% of theoretical density (~5.9 g/cm3). Any open porosity will cause "gas crossover," resulting in a low Open Circuit Voltage (OCV).
In a test environment (eg: button cell), the YSZ pellet is "functionalized" by applying electrodes to both sides: (1) Anode Side (Fuel): Typically a Ni-YSZ cermet. This is screen-printed or painted onto one side and fired (usually at 1300-1400 °C). (2) Cathode Side (Air): Materials like LSM (750-900 °C) or LSCF (600-750 °C). It should be noted that if using LSCF, a GDC barrier layer must be applied to the YSZ pellet first to prevent SrZrO3 formation. (4) Current Collection: Platinum (Pt) or Gold (Au) meshes are pressed against the electrodes to extract current.
| Part Number |
CSOFEC8YSZEP (C-SOFEC-8YSZEP) |
| Chemical Formula |
(Y2O3)0.08(ZrO2)0.92 |
| Active Powder | |
| Electrolyte Pellet Size |
(1) Disk: D15 mm (T: ~100 um) (2) Disk: D20 mm (T: ~100 um) (3) Sheet: 5cm * 5cm (T: ~200-300 um) (4) Sheet: 10cm * 10cm (T: ~200-300 um) |
| Package Grade |
1 pcs/pack (bulk quantity can be supplied upon request and certain discount will be applied) |
References:
- J. Schefold, et al., Electronic Conduction of Yttria-Stabilized Zirconia Electrolyte in Solid Oxide Cells Operated in High Temperature Water Electrolysis, J. Electrochem. Soc., 2009, 156, B897
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S. K. Kim, et al., Understanding the phase stability of yttria stabilized zirconia electrolyte under solid oxide electrolysis cell operation conditions, J. Mater. Chem. A, 2024,12, 8319-8330.