A novel double dysprosium- and tantalum-doped bismuth oxide electrolyte synthesized by solid-state reaction for low-temperature solid oxide fuel cells (LT-SOFCs) is here reported. The phase structures at room temperature were defined by X-ray powder diffraction (XRD). A stable δ-Bi₂O₃ phase was obtained by co-doping Bi₂O₃ with Dy₂O₃ and Ta₂O₅ in specific contents. The effect of the co-dopant total content (5–15 mol%) on the ionic conductivity was measured as a function of temperature (300 to 700 °C). Results revealed that the (Dy₂O₃)₁₃(Ta₂O₅)₂(Bi₂O₃)₈₅ system showed the highest ionic conductivity as 0.08 S cm⁻¹ at 500 °C, which is three times higher than the binary system reported in the literature (E₂O₃)₂₀(Bi₂O₃)₈₀ (20ESB) and in the same range as the ternary system with the highest conductivity reported so far (Dy₂O₃)₈(W₂O₃)₄(Bi₂O₃)₈₈ (8D4WSB). The lowest activation energy for our system was 0.20 eV at temperatures higher than 550 °C.

中文翻译：

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用于低温SOFC的高离子电导率的and钽钽共掺杂氧化铋电解质

本文报道了一种通过固态反应合成的低温double氧化物燃料电池（LT-SOFC）的新型double，钽掺杂的铋氧化物。室温下的相结构通过X射线粉末衍射（XRD）确定。稳定的δ-Bi系₂ ö ₃通过共掺杂的Bi，得到相₂ ö ₃与镝₂ ö ₃和Ta ₂ ö ₅中具体内容。测量了共掺杂剂总含量（5-15 mol％）对离子电导率的影响，该影响是温度（300至700°C）的函数。结果显示（Dy ₂ O ₃）₁₃（Ta ₂O ₅）₂（Bi ₂ O ₃）₈₅体系在500°C时显示出最高的离子电导率，为0.08 S cm ^-1，比文献中报道的二元体系（E ₂ O ₃）₂₀（Bi ₂ O ₃）₈₀（20ESB），并且与迄今报道的电导率最高的三元体系在相同范围内（Dy ₂ O ₃）₈（W ₂ O ₃）₄（Bi ₂ O ₃）₈₈（8D4WSB）。在高于550°C的温度下，我们系统的最低活化能为0.20 eV。