A dense La(Sr)Fe(Mn)O3-δ nano-film anode for intermediate-temperature solid oxide fuel cells
A dense La(Sr)Fe(Mn)O3-δ nano-film anode for intermediate-temperature solid oxide fuel cells
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DOI：
10.1039/c4ta05664g
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发表时间：
2015-01-01
影响因子：
11.9
通讯作者：
Ishihara, Tatsumi
中科院分区：
文献类型：
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作者：
Ju, Young-Wan;Hyodo, Junji;Ishihara, Tatsumi
为了在中温固体氧化物燃料电池（IT-SOFC）中实现高功率密度，我们在Ni-Fe金属基底和LaGaO 3基氧化物电解质之间引入了致密的La（Sr）Fe（Mn）O3-delta（LSFM）纳米膜阳极。虽然三相边界（TPB）被认为是阳极活性位点所需的，但与具有简单多孔Ni-Fe阳极的电池相比，具有LSFM混合导体薄膜阳极的电池表现出大大改善的功率密度。在973 K时，具有LSFM膜的电池的最大功率密度约为3.0 W cm（-2）。提高的功率密度主要归因于增强的阳极活性。此外，我们观察到致密的LSFM薄膜阳极在提高Ni-Fe金属阳极支撑电池的燃料利用率方面是有效的。这表明在LaFeO 3钙钛矿处的两相边界（阳极和气相）对阳极反应是高度活跃的。
To achieve high power density in intermediate-temperature solid oxide fuel cells (IT-SOFCs), we introduce a dense La(Sr)Fe(Mn)O3-delta (LSFM) nano-film anode between a Ni-Fe metallic substrate and a LaGaO3-based oxide electrolyte. Although a three-phase boundary (TPB) is believed to be required for anode active sites, the cell with the LSFM mixed-conductor thin-film anode exhibited much improved power density compared with that of the cell with a simple porous Ni-Fe anode. The maximum power density of the cell with the LSFM film was approximately 3.0 W cm(-2) at 973 K. The improved power density was primarily attributed to the enhanced anodic activity. Furthermore, we observed that the dense LSFM thin-film anode is effective in increasing the fuel utilization of a Ni-Fe metallic anode supported cell. This suggests that a two-phase boundary (anode and gas phase) at the LaFeO3 perovskite is highly active towards the anodic reaction.