【摘要】 采用柠檬酸-硝酸盐自蔓延燃烧法合成了Sm_0.9Pr_0.1FeO_3-δ（SPF）粉体。以YSZ为电解质,SPF同时作为阴极和阳极,构建了对称固体氧化物燃料电池SPF|YSZ|SPF。利用X射线衍射法研究材料的成相以及相互间的化学稳定性,交流阻抗法记录界面极化行为,热膨胀仪评估材料的热膨胀系数,用扫描电子显微镜观察电池的断面微观结构,用自组装的测试系统评价电池输出性能。结果表明,合成的SPF粉体呈钙钛矿结构,且在还原条件下仍保持不变,与电解质YSZ间有良好的化学及热稳定性;800℃时空气及氢气气氛下的电解质|电极间的极化阻抗分别为0.15和15.80Ω·cm2;以加湿H2（含体积分数3%的水蒸气）为燃料气,空气为氧化气时,单电池SPF|YSZ|SPF输出功率密度为168mW/cm2。结果显示SPF是对称固体氧化物燃料电池良好的候选电极材料。更多还原

【Abstract】 Sm_0.9Pr_0.1FeO_3-δ（SPF）powders were synthesized by a citric acid-nitrates self-propagating combustion method.The YSZ-supported symmetrical solid oxide fuel cell based on the configuration of SPF│YSZ│SPF was fabricated.The phase structure,chemical compatibility,polarization resistance,cross-section microstructure and the cell performance were investigated by X-ray diffraction（XRD）,electrochemical impedance spectra,thermal dilatometer,scanning electron microscope（SEM）and self-assembly SOFC test system,respectively.The XRD results indicate that the synthesized SPF powder exhibited a single perovskite structure and was chemically and thermally compatible with YSZ electrolyte.The area specific resistances（ASR）of SPF│YSZ in air and hydrogen atmosphere at 800℃ were 0.15 and 15.80Ω·cm2,respectively.The maximum power density of SPF symmetrical cell was 168mW/cm2 at 850℃ with humidified hydrogen（3%H2O）as fuel and ambient air as oxidant.The results indicate that SPF is a promising electrode material for symmetrical solid oxide fuel cells.更多还原