Characterization of Sr/Ru co-doped ferrite based perovskite as a symmetrical electrode material for solid oxide fuel cells
Characterization of Sr/Ru co-doped ferrite based perovskite as a symmetrical electrode material for solid oxide fuel cells
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Sr/Ru共掺杂铁氧体基钙钛矿作为固体氧化物燃料电池对称电极材料的表征
DOI：
10.1016/j.jpowsour.2017.02.090
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发表时间：
2017-04-30
影响因子：
9.2
通讯作者：
Cheng, Yonghong
中科院分区：
文献类型：
--
作者：
Fan, Weiwei;Sun, Zhu;Cheng, Yonghong
合成了钙钛矿结构的Sm0.9Sr0.1Fe0.9Ru0.1O3-delta（SSFR），并将其作为一种新型的固体氧化物燃料电池（SOFC）对称电极材料进行了研究。X射线衍射分析表明，SSFR为正交晶系，空间群为Pnma（62）。在800 ℃的氢气和氧气气氛中进行了一系列实验后，极化电阻（R-p）没有显著变化，表明SSFR具有良好的氧化还原稳定性。为了深入了解SSFR电极的限速步骤，研究了在不同氧分压（pO（2））下R-p的行为。通常，Rp和pO（2）之间的关系遵循等式R-p = k（pO（2））（-n），并且不同的n值对应于不同的速率限制步骤。在本研究中，在高温下，SSFR阴极的n值为0：5，与氧原子的扩散有关。在高pO（2）时，SSFR呈现p型导电行为，随着pO（2）的降低，在10（-17）~ 10（-18）atm范围内发生p-n转变。此外，Sm0.2Ce0.8O1.9（SDC，类似于0.6mm）电解质支撑的对称电池SSFRISDCISSFR的峰值功率密度在800 ℃下使用加湿氢（类似于3%H2O）作为燃料达到119.69mW cm（-2）。(C)2017爱思唯尔B. V.保留所有权利。
The perovskite Sm0.9Sr0.1Fe0.9Ru0.1O3-delta (SSFR) is synthesized and investigated as a new type of symmetrical electrode material for solid oxide fuel cells (SOFCs). X-ray diffraction analysis indicates that SSFR exhibits an orthorhombic structure with a space group of Pnma (62). There are no significant changes in polarization resistance (R-p) after a series of experiments in hydrogen and oxygen atmospheres at 800 degrees C, implying that SSFR has a good redox stability. To get an insight into the rate-limiting steps of SSFR electrode, behavior of R-p, is investigated in different oxygen partial pressures (pO(2)). Generally, the relationship between Rp and pO(2) follows the equation R-p = k(pO(2))(-n) and different n values correspond to different rate-limiting steps. In this study, the n value of 0:5 is obtained for SSFR cathode at high temperature, relating to the diffusion of oxygen atom. In high pO(2), SSFR presents a p-type conducting behavior, with decreasing pO(2), a p-n transition occurs in the range 10(-17) to 10(-18) atm. Additionally, peak power density of the Sm0.2Ce0.8O1.9 (SDC, similar to 0.6 mm) electrolyte -supported symmetrical cell SSFRISDCISSFR achieves 119.69 mW cm(-2) at 800 degrees C using humidified hydrogen (similar to 3% H2O) as fuel. (C) 2017 Elsevier B.V. All rights reserved.