An Efficient SOFC Based on Samaria-Doped Ceria (SDC) Electrolyte
An Efficient SOFC Based on Samaria-Doped Ceria (SDC) Electrolyte
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DOI：
10.1149/2.032206jes
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发表时间：
2012
影响因子：
3.9
通讯作者：
Mingfei Liu;D. Ding;Yaohui Bai;T. He;Meilin Liu
中科院分区：
文献类型：
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作者：
Mingfei Liu;D. Ding;Yaohui Bai;T. He;Meilin Liu
掺杂二氧化铈作为中温固体氧化物燃料电池（IT-SOFC）的电解质材料已被广泛研究。虽然已报道了高峰值功率密度，但在燃料电池工作条件下，掺杂二氧化铈的电子电导率会降低开路电压（OCV），从而降低能源效率，在较高工作温度下使用较薄的电解质膜更是如此。在这里，我们报告了一种新的电池结构：由混合离子导体 BaZr0.1Ce0.7Y0.1Yb0.1O3−δ (BZCYYb) 和 NiO 组成的复合阳极支撑的薄 SDC 电解质膜。共烧过程中BZCYYb和SDC之间的相互扩散会在界面处形成一层薄薄的掺杂铈酸钡和锆酸盐，从而抑制SDC的电子传导并增强OCV和电池性能。当在 750°C 下使用湿氢或甲烷作为燃料时，新的电池结构还表现出出色的稳定性。 ©2012 电化学协会。 [DOI：10.1149/2.032206jes] 保留所有权利。
Doped ceria has been widely studied as electrolyte materials for intermediate temperature solid oxide fuel cells (IT-SOFCs). While high peak power densities have been reported, the electronic conductivity of doped ceria under fuel cell operating conditions reduces the open circuit voltage (OCV) and hence energy efficiency, more so with thinner electrolyte membrane at higher operating temperatures. Here we report a new cell structure: a thin SDC electrolyte membrane supported by a composite anode consisting of a mixed-ion conductor BaZr0.1Ce0.7Y0.1Yb0.1O3−δ (BZCYYb) and NiO. The inter-diffusion between BZCYYb and SDC during co-firing results in a thin layer of doped barium cerate and zirconate at the interface, which suppresses the electronic conduction of SDC and enhances the OCV and cell performance. The new cell structure also shows excellent stability when wet hydrogen or methane was used as fuel at 750◦C. ©2012 The Electrochemical Society. [DOI: 10.1149/2.032206jes] All rights reserved.