@article{YANG2026, 
author = {Jian-Ming YANG and Yi-Chao GONG and Hu ZHAO and Jian-Qi QI and Guo-Jun ZHANG},
title = {Preparation and Electrochemical Performance of Rare-Earth Doped CeO2-Based Electrolytes: A Systematic Comparison of Sm3+, Gd3+, Y3+ and La3+},
year = {2026},
journal = {Advanced Ceramics},
volume = {47},
number = {5},
pages = {601-614},
keywords = {Rare-earth Doping, CeO2-Based Electrolytes, Ionic Conductivity, Oxygen Vacancies},
url = {https://www.sciopen.com/article/10.16253/j.cnki.37-1226/tq.2026.05.013},
doi = {10.16253/j.cnki.37-1226/tq.2026.05.013},
abstract = {The reduction of operating temperature for solid oxide fuel cells (SOFCs) imposes higher requirements on the ionic conductivity of electrolyte materials. CeO2-based electrolytes have attracted considerable attention due to their superior ionic conductivity in the intermediate-to-low temperature range. However, pure CeO2 tends to develop electronic conduction under reducing atmospheres, which severely limits its practical application. In this study, CeO2-based electrolyte materials doped with four rare-earth ions, namely Sm3+, Gd3+, Y3+ and La3+, were synthesized via a co-precipitation method. The effects of dopant species on the crystal structure, microstructure, sintering behavior, electrochemical performance and single-cell output performance were systematically investigated. The results indicate that all doped samples form single-phase solid solutions with a cubic fluorite structure. Gd3+/La3+ doping significantly promotes the densification of CeO2. Among all samples, Sm- and Gd-doped CeO2exhibit the highest oxygen vacancy concentration. Sm-doped CeO2 achieves an ionic conductivity of 0.04 S/cm at 700 ℃, and the single cell based on this electrolyte exhibits a maximum power density of approximately 90 mW/cm2, which is substantially superior to those of the other doping systems. This comprehensive study demonstrates that Sm-doped CeO2 is the most promising electrolyte material among the four systems for intermediate-to-low temperature SOFCs applications.}
}