High-performance bilayered electrolyte intermediate temperature solid oxide fuel cells
High-performance bilayered electrolyte intermediate temperature solid oxide fuel cells
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DOI：
10.1016/j.elecom.2009.05.041
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发表时间：
2009-07-01
影响因子：
5.4
通讯作者：
Wachsman, Eric D.
中科院分区：
文献类型：
--
作者：
Ahn, Jin Soo;Pergolesi, Daniele;Wachsman, Eric D.
ESB/GDC 双层电解质概念已被证明可以提高开路电压并降低使用传统单层 GDC 电解质的 SOFC 的有效面积电阻率。然而，这种双层电池的高性能尚未得到证实。实现这一目标的主要障碍是阳极支撑薄膜电解质的制造以及 ESB 与传统阴极的反应性。最近，开发了一种与 ESB 兼容的低面积比电阻阴极：微观结构优化的 Bi2Ru2O7-ESB 复合材料。此外，我们最近开发了一种新型阳极功能层，可以显着提高使用 GDC 电解质的 SOFC 的性能。这项研究结合了 SOFC 研究的最新成果，表明使用 ESB/GDC 双层电解质和 Bi2Ru2O7-ESB 复合阴极可以实现 SOFC 的卓越性能。结果证实，双层电解质和Bi2Ru2O7-ESB正极可以提高开路电位并降低总面积比电阻。双层 SOFC 的最大功率密度提高至 1.95 W cm(-2)，在 650 摄氏度时总电池面积比电阻为 0.079 Omega cm(2)。这是 IT 范围内迄今为止实现的最高功率，我们相信重新定义了 IT-SOFC 工作条件下最大功率的预期水平。 (c) 2009 Elsevier B.V. 保留所有权利。
The ESB/GDC bilayer electrolyte concept has been proved to improve open circuit voltage and reduce the effective area specific resistance of SOFCs utilizing a conventional single-layer GDC electrolyte. However, high performance from such bilayer cells had not yet been demonstrated. The main obstacles toward this end have been fabrication of anode-supported thin-film electrolytes and the reactivity of ESB with conventional cathodes, Recently, an ESB-compatible low area specific resistance cathode was developed: microstructurally optimized Bi2Ru2O7-ESB composites. In addition, we recently developed a novel anode functional layer which can significantly enhance the performance of SOFC utilizing GDC electrolytes. This study combines these recent achievements in SOFC studies and shows that exceptionally high performance of SOFC is possible using ESB/GDC bilayer electrolytes and Bi2Ru2O7-ESB composite cathodes. The result confirms that the bilayer electrolyte and the Bi2Ru2O7-ESB cathode can increase the open circuit potential and reduce the total area specific resistance. The maximum power density of the bilayered SOFC was improved to 1.95 W cm(-2) with 0.079 Omega cm(2) total cell area specific resistance at 650 degrees C. This is the highest power yet achieved in the IT range and we believe redefines the expectation level for maximum power under IT-SOFC operating conditions. (c) 2009 Elsevier B.V. All rights reserved.