Crystal phase, electrical properties, and solid oxide fuel cell electrolyte application of scandia-stabilized zirconia doped with rare earth elements
| Autor: | Ryushiro Tokunaga, Yasushi Nakajima, Shota Kondo, Makoto Takata, Susumu Nakayama |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Electrochemical impedance analysis
Phase transition Materials science Analytical chemistry Oxide Clay industries. Ceramics. Glass Electrolyte Conductivity Electronic Optical and Magnetic Materials X-ray diffraction Biomaterials Crystal chemistry.chemical_compound TP785-869 chemistry Phase (matter) Materials Chemistry Ceramics and Composites Solid oxide fuel cell Cubic zirconia Arrhenius plot |
| Zdroj: | Open Ceramics, Vol 6, Iss, Pp 100136-(2021) |
| ISSN: | 2666-5395 |
| Popis: | ZrO2–10 mol% Sc2O3 (10ScSZ) has attracted attention as an electrolyte material for solid oxide fuel cells owing to its high conductivity. However, the phase transition between cubic and rhombohedral occurs in the range 500–600 °C, resulting in its rapid decrease in conductivity below 500 °C. In this study, we determined the elements that can eliminate phase transition in the range 500–600 °C for 10ScSZ to realize high conductivity for all temperature regions. Rare elements were incorporated to 10ScSZ. X-ray diffraction and conductivity measurements were used to confirm the occurrence of phase transition. The results noted that the addition of La, Ce, Pr, Nd, Sm, Eu, Gd, and Tb improved the conductivity of 10ScSZ below 500 °C, unlike that with the addition of Dy, Y, Ho, Er, Tm, Yb, Lu, and Sc. Further, although the addition of Ce to 10ScSZ was considered a solution, Nd and Sm were also noted to be effective additives. |
| Databáze: | OpenAIRE |
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