Yang Bing, Sun Mingxu, Li Peng, Yin Kaichao, Wang Mengjia, Li Bo, Chen Jing, Sun Xuzhuo, Tian Yunfeng, Xia Kaisheng, Chi Bo
School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, 450001, China.
Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430078, China.
ChemSusChem. 2025 Sep 23;18(18):e202501000. doi: 10.1002/cssc.202501000. Epub 2025 Jul 21.
High-performance solid oxide fuel cells (SOFCs) operating at intermediate to low temperatures require cathode materials with enhanced activity and stability. This study investigates the effect of excess B-site cations on the electrochemical performance of SmSrCoO (SSC) electrodes. A series of SmSrCoO (SSC1 + x, X = 0, 0.05, 0.1, 0.15, and 0.3) perovskite cathodes with varying Co excess are synthesized to investigate their effect on electrical conductivity, oxygen vacancy formation, and overall cathode properties. The SmSrCoO (SSC1.1) composition demonstrates a polarization resistance of 0.517 Ω cm at 550 °C, outperforming the standard SSC cathode (0.711 Ω cm). Moreover, single cells with SSC1.1 cathodes achieve a peak power density of 1.054 W cm at 700 °C, marking a 25% improvement over standard SSC cathodes (0.842 W cm). These results highlight the potential of SSC1.1 as an advanced cathode material for enhancing SOFC performance at reduced temperatures.
在中低温下运行的高性能固体氧化物燃料电池（SOFC）需要具有更高活性和稳定性的阴极材料。本研究调查了过量B位阳离子对SmSrCoO（SSC）电极电化学性能的影响。合成了一系列具有不同Co过量的SmSrCoO（SSC1+x，X = 0、0.05、0.1、0.15和0.3）钙钛矿阴极，以研究其对电导率、氧空位形成和整体阴极性能的影响。SmSrCoO（SSC1.1）组成在550°C时表现出0.517Ω·cm的极化电阻，优于标准SSC阴极（0.711Ω·cm）。此外，具有SSC1.1阴极的单电池在700°C时实现了1.054W/cm的峰值功率密度，比标准SSC阴极（0.842W/cm）提高了25%。这些结果突出了SSC1.1作为一种先进阴极材料在降低温度下提高SOFC性能的潜力。
