Abstract
\({\text{BaCe}}_{0.7} {\text{Sn}}_{0.1} {\text{Gd}}_{0.2} {\text{O}}_{3 - \sigma } \) (BCSG) and \({\text{BaCe}}_{0.8} {\text{Gd}}_{0.2} {\text{O}}_{3 - \sigma } \) (BCG) powders were prepared by solid-state reaction method. After exposure in 5% CO2 + 5% H2O + 90% N2 at 500 °C for 5 h, the BCSG powders were hardly affected while the BCG powders decomposed into CeO2 and BaCO3 phases. Moreover, the relative density of BCSG reaches 97%, while the BCG just displays 91% after sintering at 1,400 °C. The BCSG displays a conductivity of 0.01 S/cm at 700 °C in humid hydrogen, which is quite close to 0.012 S/cm for BCG. A fuel cell with BCSG exhibits 1.02 V for open circuit voltage, 420 mW/cm2 for peak performance and 0.23 Ω cm2 for interfacial resistance at 700 °C, respectively.
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Yan, R., Wang, Q. & Xie, K. A stable and easily sintering \({\text{BaCe}}_{0.7} {\text{Sn}}_{0.1} {\text{Gd}}_{0.2} {\text{O}}_{3 - \delta } \) electrolyte for solid oxide fuel cells. Ionics 15, 501–505 (2009). https://doi.org/10.1007/s11581-008-0282-4
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DOI: https://doi.org/10.1007/s11581-008-0282-4