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首页> 外文期刊>Electrochimica Acta >Effect of samaria-doped ceria (SDC) interlayer on the performance of La0.6Sr0.4Co0.2Fe0.8O3-delta/SDC composite oxygen electrode for reversible solid oxide fuel cells
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Effect of samaria-doped ceria (SDC) interlayer on the performance of La0.6Sr0.4Co0.2Fe0.8O3-delta/SDC composite oxygen electrode for reversible solid oxide fuel cells

机译：钐掺杂二氧化铈（SDC）中间层对可逆固体氧化物燃料电池的La0.6SR0.4CO0.2FE0.8O3-DERTA / SDC复合氧气性能的影响

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In order to establish clear criteria for designing highly active and highly durable oxygen electrode for reversible solid oxide fuel cells, we have focused on the effect of samaria-doped ceria (SDC) interlayers prepared on YSZ solid electrolyte surface on the performances of La0.6Sr0.4Co0.2Fe0.8O3-delta (LSCF)-SDC composite oxygen electrode. Symmetrical cells with the configuration, LSCF-SDC vertical bar SDC interlayer vertical bar YSZ vertical bar SDC interlayer vertical bar LSCF-SDC, were constructed. We prepared two kinds of SDC interlayers, one from a mixed solution of cerium 2-ethylhexanoate (denoted as octoate) and samarium octoates (o-interlayer) and another from a mixed solution of cerium and samarium nitrates (n-interlayer). The LSCF-SDC electrodes with o-interlayer and n-interlayer exhibited very similar performances in both the anodic and cathodic reactions at 900 degrees C. When temperature was decreased to 800 degrees C, an increase in overpotentials was observed. However, the LSCF-SDC electrode with o-interlayer exhibited superior performance to that with n-interlayer. It was found that the entire surface of the YSZ electrolyte disk was well covered with a dense o-interlayer of uniform thickness. Such an interlayer enables uniform transport of oxide ions to and from the LSCF-SDC electrode, resulting in an enlarged effective reaction zone (ERZ). The I-E performance of the LSCF-SDC vertical bar o-interlayer vertical bar YSZ cell was found to be comparable to that of the identical electrode prepared on a dense SDC sintered electrolyte disk (as a reference). This observation supports our views regarding the essential role of a dense interlayer with uniform thickness in enhancing the performance of reversible solid oxide cells. (C) 2016 Elsevier Ltd. All rights reserved.
机译：为了建立用于设计高活性和高耐久的氧电极的明确标准，用于可逆固体氧化物燃料电池，我们专注于撒玛西亚掺杂的二氧化铈（SDC）中间层对YSZ固体电解质表面对LA0.6SR0的性能的影响.4CO0.2FE0.8O3-DELTA（LSCF）-SDC复合氧电极。具有配置的对称电池，LSCF-SDC垂直杆SDC中间层垂直条YSZ垂直杆SDC层间垂直条LSCF-SDC。我们制备了两种SDC夹层，其中一种来自铈2-乙基己酸铈（表示为辛酸盐）和钐辛酸钐（O-中间层）的混合溶液，以及来自铈和硝酸钐（N-中间层）的混合溶液。具有O-中间层和N层间的LSCF-SDC电极在900℃下在阳极和阴极反应中表现出非常相似的性能。当温度降低至800℃时，观察到过电位的增加。然而，具有O-中间层的LSCF-SDC电极具有与N-中间层的优异性能。发现YSZ电解质盘的整个表面很好地覆盖着致密的厚度的致密o夹层。这种中间层使得能够均匀地传送氧化物离子与LSCF-SDC电极，导致增大的有效反应区（ERZ）。发现LSCF-SDC垂直条O-中间层垂直条YSZ电池的I-E性能与在致密SDC烧结电解质盘上制备的相同电极的I-E性能相当。该观察结果支持我们对致密层间具有均匀厚度的基本作用的看法，以提高可逆固体氧化物细胞的性能。 （c）2016 Elsevier有限公司保留所有权利。

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