Ni–Fe Alloy-Supported Intermediate Temperature SOFCs Using LaGaO3 Electrolyte Film for Quick Startup
Ni–Fe Alloy-Supported Intermediate Temperature SOFCs Using LaGaO3 Electrolyte Film for Quick Startup
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DOI：
10.1115/1.2930763
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发表时间：
2008-08
影响因子：
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通讯作者：
T. Ishihara;Jingwang Yan;M. Enoki;Sachio Okada;H. Matsumoto
中科院分区：
文献类型：
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作者：
T. Ishihara;Jingwang Yan;M. Enoki;Sachio Okada;H. Matsumoto
采用原位还原法制备了Ni-Fe多孔合金基片，研究了中温固体氧化物燃料电池（SOFC）的热循环耐受性。结果表明，Ni-Fe合金具有良好的阳极反应活性和与InGaO 3电解液的相容性。在致密的NiO-Fe 2 O3复合阳极上成功制备了厚度为5 μm的La0.9Sr0.1Ga0.8Mg0.2O3（LSGM）和Sm0.2Ce0.8O2（SDC）双层电解质膜。经原位还原后，致密的NiO-Fe 2 O3片层转变为多孔的Ni-Fe合金基体，而LSGM膜层仍能保持致密状态。制备的负载LSGM电池的Ni-Fe合金在873 K和573 K下的最大功率密度分别为0.9W/cm 2和0.4W/cm 2。在540 s内加热到873 K后，薄膜上没有裂纹形成，开路电压接近理论值。此外，在773 K下获得了400 mW/cm 2的最大功率密度在热循环之后，最大功率密度的降低不大，这表明膜仍然是气密的并且对热循环具有高度耐受性。金属支撑固体氧化物燃料电池的快速启动特性可以将固体氧化物燃料电池的应用扩展到类似移动场的汽车电源。
Intermediate temperature solid oxide fuel cells (SOFCs), which are highly tolerant against a thermal cycle, are studied by using the Ni-Fe porous alloy substrate prepared by an in situ reduction. It was found that Ni-Fe alloy exhibits high activity against anodic reaction and suitable compatibility with InGaO 3 electrolyte. The electrolyte film of La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 O 3 (LSGM) and Sm 0.2 Ce 0.8 O 2 (SDC) bilayer with 5 μm thickness was successfully prepared on the dense NiO-Fe 2 O 3 composite anode. After a in situ reduction, the dense plate of NiO-Fe 2 O 3 was changed to the porous Ni-Fe alloy substrate; however, the LSGM film can keep the dense state. The prepared Ni-Fe alloy that supported LSGM cell demonstrated the maximum power densities of 0.9 W/cm 2 and 0.4 W/cm 2 at 873 K and 573 K. After heating up to 873 K within 540 s, there is no crack formed on the film and almost the theoretical open circuit voltage was exhibited. In addition, the maximum power density of 400 mW/cm 2 was achieved at 773 K. After the thermal cycling, the decrease in the maximum power density was not large, and this suggests that the film is still gas tight and highly tolerant against the thermal cycle. Quick start characteristics of the metal support SOFC could expand the SOFC application to the electric source of a mobile-field-like automobile.