TY - JOUR
T1 - Unlocking scandia stabilized zirconia
T2 - Aging suppression by ternary co-doping
AU - Mathur, Lakshya
AU - Hanantyo, Muhammad Pramaditya Garry
AU - Park, Saron
AU - Lee, Hajin
AU - Sengodan, Sivaprakash
AU - Song, Sun Ju
N1 - Publisher Copyright:
© 2025 Elsevier B.V.
PY - 2025/9/15
Y1 - 2025/9/15
N2 - This study aims to unlock the potential of ternary co-doping to mitigate the aging phenomena in scandia-stabilized zirconia (SSZs) while maintaining their intrinsic characteristics of ion conduction. Precisely, a strategic partial replacement of zirconia in the SSZ has been made with two different-sized cations, and its effect on atomic arrangement, electrical conductivity, and aging has been explored. The results revealed that (In2O3)0.0025 (Yb2O3)0.0025 (Sc2O3)0.11 (ZrO2)0.885 (In-Yb11SSZ) had suppressed the aging of (Sc2O3)0.11 (ZrO2)0.89 (11SSZ) by 44 % and 65 % in typical cathodic (air) and anodic (97 vol% H2/3 vol% H2O) conditions of solid oxide fuel cells (SOFCs) at 800 °C, with a remarkable ionic conductivity of 0.087 S/cm at 800 °C. Furthermore, this In-Yb11SSZ demonstrates a bending strength of 140 MPa, which is comparable to existing state-of-the-art electrolytes. Moreover, an electrolyte-supported cell (ESC) based on In-Yb11SSZ demonstrates a peak power density of 530 mW/cm2 at 800 °C, with a degradation of 5.5 % in 150 h under harsh current conditions (460 mA/cm2). These results are ∼30–40 % higher than existing state-of-the-electrolyte-based ESCs, which shows the potential of this composition to be used as an electrolyte in ESCs for SOFCs.
AB - This study aims to unlock the potential of ternary co-doping to mitigate the aging phenomena in scandia-stabilized zirconia (SSZs) while maintaining their intrinsic characteristics of ion conduction. Precisely, a strategic partial replacement of zirconia in the SSZ has been made with two different-sized cations, and its effect on atomic arrangement, electrical conductivity, and aging has been explored. The results revealed that (In2O3)0.0025 (Yb2O3)0.0025 (Sc2O3)0.11 (ZrO2)0.885 (In-Yb11SSZ) had suppressed the aging of (Sc2O3)0.11 (ZrO2)0.89 (11SSZ) by 44 % and 65 % in typical cathodic (air) and anodic (97 vol% H2/3 vol% H2O) conditions of solid oxide fuel cells (SOFCs) at 800 °C, with a remarkable ionic conductivity of 0.087 S/cm at 800 °C. Furthermore, this In-Yb11SSZ demonstrates a bending strength of 140 MPa, which is comparable to existing state-of-the-art electrolytes. Moreover, an electrolyte-supported cell (ESC) based on In-Yb11SSZ demonstrates a peak power density of 530 mW/cm2 at 800 °C, with a degradation of 5.5 % in 150 h under harsh current conditions (460 mA/cm2). These results are ∼30–40 % higher than existing state-of-the-electrolyte-based ESCs, which shows the potential of this composition to be used as an electrolyte in ESCs for SOFCs.
KW - Electrolyte supported cells
KW - Solid oxide cells
KW - Solid oxide fuel cells
KW - Solid state electrolyte
UR - https://www.scopus.com/pages/publications/105007056995
U2 - 10.1016/j.jpowsour.2025.237505
DO - 10.1016/j.jpowsour.2025.237505
M3 - Article
AN - SCOPUS:105007056995
SN - 0378-7753
VL - 650
JO - Journal of Power Sources
JF - Journal of Power Sources
M1 - 237505
ER -
