: Perovskite-based composite cathodes, La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ (LSCF)–Ce_0.8Sm_0.2O_1.9-carbonate (SDCC), were investigated as cathode materials for low-temperature solid-oxide fuel cells. The LSCF was mixed with the SDC–carbonate (SDCC) composite electrolyte at different weight percentages (i.e., 30, 40, and 50 wt %) to prepare the LSCF–SDCC composite cathode. The effect of SDCC composite electrolyte content on the diffraction pattern, microstructure, specific surface area, and electrochemical performances of the LSCF–SDCC composite cathode were evaluated. The XRD pattern revealed that the SDCC phase diffraction peaks vary according to its increasing addition to the system. The introduction of SDCCs within the composite cathode did not change the LSCF phase structure and its specific surface area. However, the electrical performance of the realized cell drastically changed with the increase of the SDCC content in the LSCF microstructure. This drastic change can be ascribed to the poor in-plane electronic conduction at the surface of the LSCF cathode layer due to the presence of the insulating phase of SDC and molten carbonate. Among the cathodes investigated, LSCF–30SDCC showed the best cell performance, exhibiting a power density value of 60.3–75.4 mW/cm² at 600 °C to 650 °C.

中文翻译：

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碳酸盐基镧锶钴铁氧体（LSCF）–掺C二氧化铈（SDC）复合阴极，用于低温固体氧化物燃料电池

：钙钛矿基复合阴极，La _0.6 Sr _0.4 Co _0.2 Fe _0.8 O3 _-δ（LSCF）–Ce _0.8 Sm _0.2 O _1.9碳酸盐（SDCC）被用作低温固体氧化物燃料电池的阴极材料。将LSCF与SDC-碳酸盐（SDCC）复合电解质以不同的重量百分比（即30、40和50 wt％）混合，以制备LSCF-SDCC复合阴极。评估了SDCC复合电解质含量对LSCF–SDCC复合阴极的衍射图样，微观结构，比表面积和电化学性能的影响。XRD图谱表明SDCC相衍射峰根据其向体系中增加的增加而变化。在复合阴极内引入SDCC不会改变LSCF相结构及其比表面积。然而，随着LSCF微结构中SDCC含量的增加，实现的电池的电性能急剧变化。这种剧烈变化可以归因于由于存在SDC和熔融碳酸盐的绝缘相而在LSCF阴极层的表面处的差的面内电子传导。在所研究的阴极中，LSCF–30SDCC显示出最佳的电池性能，其功率密度值为60.3–75.4 mW / cm²在600°C至650°C下。