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Enhanced electrochemical performance of the YBa 0.5 Sr 0.5 Co 1.4 Cu 0.6 O 5+δ cathode material by Sm 0.2 Ce 0.8 O 1.9 incorporation for solid oxide fuel cells application
Journal of Sol-Gel Science and Technology ( IF 2.5 ) Pub Date : 2020-09-10 , DOI: 10.1007/s10971-020-05409-6
Minghui Liu , Xinmin Fu , Xiangwei Meng , Shiquan Lü , Shuhang Ren , Xiaoyan Liu , Fengyou Wang , Hougang Fan , Yanli Chen , Lizhong Wang

The performance of YBa0.5Sr0.5Co1.4Cu0.6O5+δ(YBSCCO)–Sm0.2Ce0.8O1.9 (SDC) composite cathode for SOFC is investigated in this paper. YBSCCO and SDC oxides are synthesized by the sol–gel method. The XRD result reveals that no obvious chemical reaction occurs after sintering the mixture of the YBSCCO and SDC at 850 °C for 20 h. The thermal expansion behavior shows that the YBSCCO–xSDC composite cathode has the suitable TEC values (13.3–11.2 × 10−6 K−1) for the common electrolyte. In different proportions of the composite cathode, YBSCCO–30SDC shows the lowest polarization resistance values, which are only about 0.022 Ω cm2 at 850 °C and 0.034 Ω cm2 at 800 °C. The electrolyte-supported single cell using YBSCCO–30SDC cathode is fabricated, and the peak power densities values are 567 and 432 mW cm−2 at 850 and 800 °C, respectively.



中文翻译:

通过掺入Sm 0.2 Ce 0.8 O 1.9增强YBa 0.5 Sr 0.5 Co 1.4 Cu 0.6 O 5 +δ正极材料的电化学性能,用于固体氧化物燃料电池

本文研究了YBa 0.5 Sr 0.5 Co 1.4 Cu 0.6 O 5+ δ(YBSCCO)–Sm 0.2 Ce 0.8 O 1.9(SDC)复合阴极用于SOFC的性能。YBSCCO和SDC氧化物是通过溶胶-凝胶法合成的。XRD结果表明,YBSCCO和SDC的混合物在850°C烧结20 h后没有发生明显的化学反应。热膨胀行为表明,YBSCCO– x SDC复合阴极具有合适的TEC值(13.3–11.2×10 -6  K -1)用于普通电解质。在复合阴极的不同比例,YBSCCO-30SDC示出了最低极化电阻值,这仅是约0.022厘米Ω 2在850℃和0.034Ω厘米2,在800℃。制作了使用YBSCCO-30SDC阴极的电解质支持的单电池,在850和800°C下的峰值功率密度分别为567和432 mW cm -2

更新日期:2020-09-10
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