The present work aims to understand the effect of binary and ternary co-dopant's presence on the ionic mobility and structural stability of stabilized zirconia. To evaluate that, binary co-dopant combinations with Yb-Sc have been opted (SegI), followed by the addition of ternary co-dopant in the later part (Seg-II). The crystallographic data suggests that all the compositions consist of cubic or tetragonal symmetry of zirconia without any other phases. Moreover, the highly dense morphology and clear grain boundaries suggest the absence of segregation of impurities. Later on, the electrical conductivity of 0.087 S/cm with a degradation of 5.4% in 150 h at 800 °C in air was obtained for x = 0.08 in (ScO)(YbO) (ZrO). This huge degradation has been suppressed in the Seg-II of this work, by adding various ternary co-dopant with a chemical formula of (M)(ScO)(YbO) (ZrO), Where M = MgO, InO, SmO, CaO. Among various ternary co-dopants, the presence of In shows the lowest degradation of 3% in 270 h with a remarkable conductivity of 0.08 S/cm at 800 °C in air. This suppression of aging without affecting much the conductivity and absence of any O dependency shows the potential of ternary co-doped (In-2Yb8SSZ) stabilized zirconia to be used as an electrolyte for solid oxide fuel cells (SOFCs) applications.

中文翻译：

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用于固体氧化物燃料电池的三元共掺镱钪稳定氧化锆电解质

目前的工作旨在了解二元和三元共掺杂剂的存在对稳定氧化锆的离子迁移率和结构稳定性的影响。为了评估这一点，选择了与 Yb-Sc 的二元共掺杂剂组合 (SegI)，然后在后面的部分中添加三元共掺杂剂 (Seg-II)。晶体学数据表明，所有成分均由立方或四方对称的氧化锆组成，没有任何其他相。此外，高致密的形态和清晰的晶界表明不存在杂质偏析。随后，对于 (ScO)(YbO) (ZrO) 中 x = 0.08，获得了 0.087 S/cm 的电导率，在 800 °C 空气中 150 小时内降解了 5.4%。通过添加化学式为 (M)(ScO)(YbO) (ZrO) 的各种三元共掺杂剂，这种巨大的退化在本工作的 Seg-II 中得到了抑制，其中 M = MgO、InO、SmO、CaO 。在各种三元共掺杂剂中，In 的存在在 270 小时内表现出最低的降解率 3%，并且在 800 °C 空气中具有 0.08 S/cm 的显着电导率。这种对老化的抑制不会对电导率产生太大影响，并且不存在任何 O 依赖性，这表明三元共掺杂 (In-2Yb8SSZ) 稳定氧化锆作为固体氧化物燃料电池 (SOFC) 应用的电解质的潜力。