Solid oxide fuel cells (SOFCs) have attracted significant attention as a highly efficient type of fuel cell. Recent research proposes the use of co-doped scandium-stabilized zirconia with Gd and Ce (denoted as 10Sc0.5Gd0.5CeSZ) and Yb and Bi co-doped gadolinium-doped ceria (denoted as GYBC) as promising materials for the electrolyte and buffer layers, respectively. 10Sc0.5Gd0.5CeSZ exhibits excellent structural stability and ionic conductivity, which can be attributed to the doping of Ce for enhanced stability and Gd for improved ionic conductivity. On the other hand, GYBC demonstrates good sinterability and ionic conductivity due to the ability of Bi to lower the sintering temperature and the high ionic conductivity of Yb. To evaluate the feasibility of 10Sc0.5Gd0.5CeSZ and GYBC at the single cell level. X-ray diffraction (XRD) peaks and Rietveld refinements show good structural stability with slight increase in the lattice parameter by doping. The particle morphologies, size distributions, and BET surface areas are evaluated for the basic material characterizations. Then, lanthanum strontium cobalt ferrite (LSCF)–gadolinium-doped ceria (GDC) was selected as cathode material with 10Sc0.5Gd0.5CeSZ and GYBC. Finally, a single cell composed of Ni-Yttria stabilized zirconia (YSZ)/10Sc0.5Gd0.5CeSZ/GYBC/LSCF-GDC (6.5:3.5) is fabricated by sequential 3-layer co-tape casting technique, and it shows good open circuit voltage of > 1.0 V, high electrochemical performance of 0.73 W/cm² and low ohmic resistance of 0.17 Ωcm² at 750 °C. Then, the electrochemical characteristics and long-term durability of this single cell are evaluated over 500 h without degradation issues. Based on these results, it is concluded that 10Sc0.5Gd0.5CeSZ and GYBC are promising candidate materials for SOFCs.

固体氧化物燃料电池（SOFC）作为一种高效燃料电池已引起人们的广泛关注。最近的研究提出使用钪稳定氧化锆与Gd和Ce（表示为10Sc0.5Gd0.5CeSZ）以及Yb和Bi共掺钆掺杂氧化铈（表示为GYBC）作为电解质和缓冲剂的有前途的材料层，分别。10Sc0.5Gd0.5CeSZ 表现出优异的结构稳定性和离子电导率，这可归因于 Ce 的掺杂增强了稳定性，Gd 的掺杂提高了离子电导率。另一方面，由于Bi具有降低烧结温度的能力以及Yb的高离子电导率，GYBC表现出良好的烧结性和离子电导率。评估10Sc0.5Gd0.5CeSZ和GYBC在单细胞水平上的可行性。X 射线衍射 (XRD) 峰和 Rietveld 精修显示出良好的结构稳定性，掺杂使晶格参数略有增加。评估颗粒形态、尺寸分布和 BET 表面积以了解基本材料特性。然后，选择镧锶钴铁氧体（LSCF）-掺钆二氧化铈（GDC）作为阴极材料，并采用10Sc0.5Gd0.5CeSZ和GYBC。最后，采用连续三层共流延浇注技术制备了由Ni-Yttria稳定氧化锆（YSZ）/10Sc0.5Gd0.5CeSZ/GYBC/LSCF-GDC（6.5:3.5）组成的单电池，并表现出良好的开路性能。电路电压 > 1.0 V，750 °C 时电化学性能为 0.73 W/cm ²，欧姆电阻为 0.17 Ωcm ²。然后，在 500 小时内评估该单电池的电化学特性和长期耐久性，没有出现降解问题。基于这些结果，得出结论：10Sc0.5Gd0.5CeSZ 和 GYBC 是有前途的 SOFC 候选材料。