Analysis of the microstructure and physical ofLa0.85Sr0.15Ga0.8Mg0.2O2.825and Ce0.85Sm0.15O1.925compositeelectrolytes used in solid oxide fuel cells
Analysis of the microstructure and physical ofLa0.85Sr0.15Ga0.8Mg0.2O2.825and Ce0.85Sm0.15O1.925compositeelectrolytes used in solid oxide fuel cells
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固体氧化物燃料电池用La0.85Sr0.15Ga0.8Mg0.2O2.825和Ce0.85Sm0.15O1.925复合电解质的微观结构和物理分析
DOI：
10.1016/j.jeurceramsoc.2015.08.036
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发表时间：
2015
影响因子：
5.7
通讯作者：
li xiang
中科院分区：
文献类型：
--
作者：
Yu-Chuan Wu;Ming-Jin Lee;li xiang
通过固相反应合成了t(100–x wt%) La0.85Sr0.15Ga0.8Mg0.2O2.825(LSGM1520) + (x wt%) Ce0.85Sm0.15O1.925(SDC15)(x = 0、2、5、7、10和100)复合电解质。通过X射线衍射、拉曼光谱、扫描电子显微镜、热机械分析和阻抗谱分析了电解质的微观结构和电性能。使用基于 La0.6Sr0.4Co0.2Fe0.8O3-ı(LSCF6428) 阴极和 Ce0.8Sm0.2O1.9–Ni (SDC20-Ni) 阴极的电解质 LSGM1520 和 95 wt% LSGM1520–5 wt% SDC15 形成两个 SOFC。复合材料的热膨胀系数在 200–600°C 时为 10.5 × 10−6/°C 至 12 × 10−6/°C，在 600–800°C 时为 12 × 10−6/°C 至 15 × 10−6/°C。 LSCF6428/LSGM1520/SDC20-Ni和LSCF6428/95L05S/SDC20-Ni的性能和电流密度在774°C时分别为264 mW/cm2和1.00 A/cm2，在789°C时分别为182 mW/cm2和0.97 A/cm2，以及它们的开路电压(OCV)约为 1.0–1.1 V。
t(100–x wt%) La0.85Sr0.15Ga0.8Mg0.2O2.825(LSGM1520) + (x wt%) Ce0.85Sm0.15O1.925(SDC15)(x = 0, 2, 5, 7, 10,and 100) composite electrolytes were synthesized by a solid-state reaction. The microstructures andelectrical properties of the electrolytes were analyzed by X-ray diffractometry, Raman spectroscopy, scan-ning electron microscopy, thermomechanical analysis, and impedance spectroscopy. The electrolytes,LSGM1520 and 95 wt% LSGM1520–5 wt% SDC15, based on a La0.6Sr0.4Co0.2Fe0.8O3-ı(LSCF6428) cathodeand Ce0.8Sm0.2O1.9–Ni (SDC20-Ni) cathode were used to form two SOFCs. The thermal expansion coeffi-cients of the composites ranged from 10.5 × 10−6/◦C to 12 × 10−6/◦C at 200–600◦C and 12 × 10−6/◦C to15 × 10−6/◦C at 600–800◦C. The performances and current density of LSCF6428/LSGM1520/SDC20-Ni andLSCF6428/95L05S/SDC20-Ni are 264 mW/cm2and 1.00 A/cm2at 774◦C, and 182 mW/cm2and 0.97 A/cm2at 789◦C, respectively, and their open circuit voltages (OCV) are ∼1.0–1.1 V.