Synthesis and Characterization of Sc and Y Co-doped Zirconia (Zr0.84Y0.08Sc0.08O1.92) Electrolyte Prepared by Sol-Gel Method

Effects of Oxygen Partial Pressure and Substrate Temperature on the Structure and Morphology of Sc and Y Co-Doped ZrO2 Solid Electrolyte Thin Films Prepared via Pulsed Laser Deposition

“…On the other hand, the fabrication of solid electrolytes into thin films may further increase the conductivity and is crucial for the development of a micron-sized SOEC system (µ-SOEC). ScYSZ thin film showed higher ionic conductivity (1.2 × 10 −1 ) at 700 • C (0.7 eV activation energy) as compared to bulk solid electrolytes [8,13,15].…”

“…Yttria-stabilized zirconia (YSZ) is the typical zirconia-based solid electrolyte used for SOECs due to its high oxide ion conductivity at elevated temperatures [1][2][3][4]. Scandia-stabilized zirconia (ScSZ), on the other hand, is also used as a solid electrolyte due to its remarkable higher ionic conductivity, almost 3x, as compared to YSZ; however, the high conductivity of the cubic phase ScSZ is limited to a narrow temperature range and with the cubic phase structural stability dependent on doping concentration and temperature [5][6][7][8]. In order to circumvent these concerns and to improve the solid electrolyte properties and performance, fabrication into thin films and co-doping are some of the promising solutions.…”

“…Co-doping of scandium and yttrium into zirconia (ScYSZ) has been reported in the literature [8][9][10][11][12][13]. The incorporation of Y 3+ and Sc 3+ as co-dopants into ZrO 2 structure can either stabilize the cubic/tetragonal phase to achieve a better or desired property such as higher conductivity as compared to single doping [8][9][10][11] and can provide good mechanical and thermal stability desirable for certain applications [14]. On the other hand, the fabrication of solid electrolytes into thin films may further increase the conductivity and is crucial for the development of a micron-sized SOEC system (µ-SOEC).…”

Highly Conducting Sc and Y co-doped Zirconia Solid Electrolyte Thin Films Prepared via Pulsed Laser Deposition for Solid Oxide Electrochemical Cells Applications

“…ScYSZ is a promising solid electrolyte for solid oxide electrochemical cell applications. This co-doped zirconia-based solid electrolyte can stabilize the structure and achieve a higher ionic conducting electrolyte at intermediate temperatures while maintaining good mechanical properties and thermal stability (1)(2)(3)(4)(5)(6)(7). Solid oxide electrochemical cells (SOEC), such as electrolysers, can be used as energy storage by converting water into hydrogen, as a fuel cell to generate electricity, or as a reversible system for electrolysis and fuel cell modes (6).…”

“…Solid oxide electrochemical cells (SOEC), such as electrolysers, can be used as energy storage by converting water into hydrogen, as a fuel cell to generate electricity, or as a reversible system for electrolysis and fuel cell modes (6). Among the widely studied electrolyte materials such as yttriastabilized zirconia (YSZ) and scandia-stabilized zirconia (ScSZ), reported co-doped zirconia (ScYSZ) has been reported to have high conductivity at intermediate temperatures (3). In the previous work (8), a dense 4Sc4YSZ electrolyte film of about 7µm was prepared and obtained a high total conductivity of about 1.2x10 -1 S/cm at 700 °C using a simple wet-deposition method.…”