Impact of Anode Microstructure on Solid Oxide Fuel Cells
Impact of Anode Microstructure on Solid Oxide Fuel Cells
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DOI：
10.1126/science.1176404
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发表时间：
2009-08-14
期刊：
影响因子：
56.9
通讯作者：
Awano, Masanobu
中科院分区：
文献类型：
--
作者：
Suzuki, Toshio;Hasan, Zahir;Awano, Masanobu
我们报告了一个管状设计的固体氧化物燃料电池（SOFC）的阳极电极的微观结构和它的电化学性能之间的相关性。结果表明，电池的电化学性能得到了广泛的改善时，组成颗粒的尺寸减小，从而产生一个高度多孔的微观结构。SOFC在低至600摄氏度的操作温度下具有大于1瓦/平方厘米的功率密度，具有常规的基于氧化锆的电解质、镍金属陶瓷阳极和镧铁氧体钙钛矿阴极材料。氢燃料流速（线速度）的影响也进行了检查的优化操作条件。对于阳极孔隙率较高的电池，较高的燃料线速度导致较好的电池性能。通过优化阳极电极的微观结构和操作条件，氧化锆基电池可用于600 ℃以下的低温SOFC系统。
We report a correlation between the microstructure of the anode electrode of a solid oxide fuel cell (SOFC) and its electrochemical performance for a tubular design. It was shown that the electrochemical performance of the cell was extensively improved when the size of constituent particles was reduced so as to yield a highly porous microstructure. The SOFC had a power density of greater than 1 watt per square centimeter at an operating temperature as low as 600 degrees C with a conventional zirconia-based electrolyte, a nickel cermet anode, and a lanthanum ferrite perovskite cathode material. The effect of the hydrogen fuel flow rate (linear velocity) was also examined for the optimization of operating conditions. Higher linear fuel velocity led to better cell performance for the cell with higher anode porosity. A zirconia-based cell could be used for a low-temperature SOFC system under 600 degrees C just by optimizing the microstructure of the anode electrode and operating conditions.