Improvement in the Electrochemical Performance of Anode‐supported Solid Oxide Fuel Cells by Meso‐ and Nanoscale Structural Modifications
Improvement in the Electrochemical Performance of Anode‐supported Solid Oxide Fuel Cells by Meso‐ and Nanoscale Structural Modifications
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DOI：
10.1002/fuce.202000079
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发表时间：
2020-09
期刊：
影响因子：
2.8
通讯作者：
H. Seo;M. Kishimoto;C. Ding;H. Iwai;M. Saito;H. Yoshida
中科院分区：
文献类型：
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作者：
H. Seo;M. Kishimoto;C. Ding;H. Iwai;M. Saito;H. Yoshida
为了提高阳极支撑固体氧化物燃料电池（SOFC）的电化学性能，微挤出印刷和湿法渗透技术分别用于介观（10-100 µm）和纳米级的结构修饰。在介观结构改性中，阳极脊结构通过在平坦阳极盘的表面上挤出阳极浆料以扩展电极-电解质界面面积来制造。在纳米级结构改性中，钆掺杂的二氧化铈（GDC）纳米颗粒被引入到多孔镧锶钴铁氧体（LSCF）阴极中。为了研究介观尺度和纳米尺度结构修饰的影响，制备了四种不同类型的阳极支撑SOFC，包括传统电池，并在几个操作温度下评估了它们的性能。结果发现，介观尺度和纳米尺度的结构修饰不仅降低了极化电阻，而且降低了电池中的欧姆电阻，从而改善了电池性能。此外，它是澄清，在电池性能的改善变得更大，降低工作温度。具体而言，与传统电池相比，在应用介观尺度和纳米尺度结构修饰的电池中的最大功率密度在600 °C下增加了66%，在700 °C下增加了34%。
To improve the electrochemical performance of anode‐supported solid oxide fuel cells (SOFCs), microextrusion printing and wet infiltration techniques are employed for structural modification on the meso‐ (10–100 µm) and nanoscale order, respectively. In the mesoscale structural modification, anode ridge structures are fabricated by extruding an anode slurry on the surface of a flat anode disk to extend the electrode–electrolyte interfacial area. In the nanoscale structural modification, gadolinium‐doped ceria (GDC) nanoparticles are introduced into a porous lanthanum strontium cobalt ferrite (LSCF) cathode. To investigate the effects of mesoscale and nanoscale structural modifications, four different types of anode‐supported SOFC including a conventional cell are prepared, and their performance is evaluated at several operating temperatures. It is found that both the mesoscale and nanoscale structural modifications reduce not only the polarization resistance but also the ohmic resistance in the cells, resulting in the improvement in cell performance. Moreover, it is clarified that the improvement in cell performance becomes greater with decreasing operating temperature. Specifically, the maximum power density in the cell where both mesoscale and nanoscale structural modifications are applied is increased by 66% at 600 °C and 34% at 700 °C, compared with that in the conventional cell.