High performance metal-supported solid oxide fuel cells fabricated by thermal spray
High performance metal-supported solid oxide fuel cells fabricated by thermal spray
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DOI：
10.1016/j.jpowsour.2009.02.067
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发表时间：
2009-06
影响因子：
9.2
通讯作者：
R. Hui;J. O. Berghaus;C. Deĉes-Petit;W. Qu;S. Yick;J. Legoux;C. Moreau
中科院分区：
文献类型：
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作者：
R. Hui;J. O. Berghaus;C. Deĉes-Petit;W. Qu;S. Yick;J. Legoux;C. Moreau
本文制备了金属支撑固体氧化物燃料电池（SOFCs）并对其进行了表征。该电池由多孔NiO-SDC作为阳极，薄SDC作为电解液，SSCo作为阴极在多孔不锈钢衬底上组成。使用标准的工业热喷涂设备，在露天环境下，通过热喷涂将阳极层和电解质层连续沉积在多孔金属基板上。将正极材料用丝网印刷的方法涂在喷涂后的半电池上，并在800℃下热处理2h。在500 ~ 700℃的温度下，通过扫描电镜（SEM）、x射线衍射、漏电测试、交流阻抗和电化学极化检测电池的组成和性能。半英寸纽扣电池在600°C和700°C下的最大功率密度分别超过0.50Wcm−2和0.92Wcm−2，使用加湿氢燃料。半英寸纽扣电池在0.5Acm−2下，603°C下运行100小时。电池电压从0.701降至0.698V，电池降解率为4.3%kh−1。阻抗分析表明，欧姆损耗和电极极化对电池降解的贡献分别为4.5%和1.4%。在相同的条件下，5cm×5cm电池在600℃和700℃下分别表现出0.26Wcm−2和0.56Wcm−2的最大功率密度。阻抗分析表明，电池的欧姆电阻是所有电池的主要极化损失，当工作温度从700°C降低到500°C时，欧姆和电极极化都显著增加。这项工作证明了使用工业上可用的沉积技术制造具有相对高性能的金属支撑sofc的可行性。进一步优化的金属支撑，电极材料和微观结构，以及沉积工艺正在进行中。
Metal-supported solid oxide fuel cells (SOFCs) have been fabricated and characterized in this work. The cells consist of porous NiO–SDC as anode, thin SDC as electrolyte, and SSCo as cathode on porous stainless steel substrate. The anode and electrolyte layers were consecutively deposited onto porous metal substrate by thermal spray, using standard industrial thermal spray equipment, operated in an open-air atmosphere. The cathode materials were applied to the as-sprayed half-cells by screen-printing and heat-treated at 800°C for 2h. The cell components and performance were examined by scanning electron microscopy (SEM), X-ray diffraction, leakage test, ac impedance and electrochemical polarization at temperatures between 500 and 700°C. The half-inch button cells exhibit a maximum power density in excess of 0.50Wcm−2at 600°C and 0.92Wcm−2at 700°C operated with humidified hydrogen fuel, respectively. The half-inch button cell was run at 0.5Acm−2at 603°C for 100h. The cell voltage decreased from 0.701 to 0.698V, giving a cell degradation rate of 4.3%kh−1. Impedance analysis indicated that the cell degradation included 4.5% contribution from ohmic loss and 1.4% contribution from electrode polarization. The 5cm×5cm cells were also fabricated under the same conditions and showed a maximum power density of 0.26Wcm−2at 600°C and 0.56Wcm−2at 700°C with dry hydrogen as fuel, respectively. The impedance analysis showed that the ohmic resistance of the cells was the major polarization loss for all the cells, while both ohmic and electrode polarizations were significantly increased when the operating temperature decreased from 700 to 500°C. This work demonstrated the feasibility for the fabrication of metal-supported SOFCs with relatively high performance using industrially available deposition techniques. Further optimization of the metal support, electrode materials and microstructure, and deposition process is ongoing.