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Wang, Shou-Qi; Geng, Ji-Hua; Zhao, Xue-Xue; Xing, Ya-Zhe
Materials chemistry and physics, 11/2023, Letnik: 309Journal Article
Ce0.8Sm0.1Nd0.1O2-δ (SNDC) is one of the most promising electrolyte materials for intermediate-temperature solid oxide fuel cells (IT-SOFCs). However, the adverse effect on the preparation of the electrolyte due to the high sintering temperature of SNDC limits the application of SNDC as an electrolyte material in IT-SOFCs. In this work, x mol % (x = 0, 0.5, 1.0, 1.5, 2.0, 2.5) Fe-doped SNDC (xFe-SNDC) powders were firstly fabricated by sol-gel synthesis, and then the corresponding bulks were prepared by cold-pressing and sintering at 1200∼1400 °C. The effects of Fe-doping on the sintering capability and electrical conductivity of SNDC were investigated. The results showed that Fe-doping leads to significant improvements in both the relative density and the electrical conductivity of SNDC. Doping Fe reduced the sintering temperature of SNDC from 1400 °C to 1200 °C and the relative density of 0.5Fe-SNDC sintered at 1200 °C reached 95.85%. Moreover, 0.5Fe-SNDC possessed the maximum conductivity of 0.0674 S cm−1 at 750 °C, which was attributed to the highest density and the highest conductivity of grain plus grain boundary. •Fe2O3-doped Ce0.8Sm0.1Nd0.1O2-δ materials were synthesized by sol-gel and calcination.•The dopant content affects the structure and ionic conductivity of sintered bulks.•Doping Fe reduced the sintering temperature of SNDC from 1400 °C to 1200 °C.•0.5mol% Fe-doped Ce0.8Sm0.1Nd0.1O2-δ bulk exhibits the maximum ionic conductivity.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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